From a5bde5d8fde8a8cb28e59a672d5ddc5b9c1e7656 Mon Sep 17 00:00:00 2001
From: Breno Leitao <leitao@debian.org>
Date: Wed, 5 Aug 2026 07:52:36 -0700
Subject: workqueue: skip the node_nr_active update for non-unbound workqueues

apply_wqattrs_commit() updates node_nr_active->max unconditionally.
wq->node_nr_active[] is only allocated for unbound workqueues, so guard
the call before per-cpu workqueues start using this path.

No functional change: only unbound workqueues reach apply_wqattrs_*()
today.

Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
---
 drivers/gpu/drm/loongson/Kconfig              |   20 +
 drivers/gpu/drm/loongson/Makefile             |   22 +
 drivers/gpu/drm/loongson/loongson_device.c    |  102 +++
 drivers/gpu/drm/loongson/loongson_module.c    |   33 +
 drivers/gpu/drm/loongson/loongson_module.h    |   12 +
 drivers/gpu/drm/loongson/lsdc_benchmark.c     |  134 ++++
 drivers/gpu/drm/loongson/lsdc_benchmark.h     |   13 +
 drivers/gpu/drm/loongson/lsdc_crtc.c          | 1026 +++++++++++++++++++++++++
 drivers/gpu/drm/loongson/lsdc_debugfs.c       |  111 +++
 drivers/gpu/drm/loongson/lsdc_drv.c           |  464 +++++++++++
 drivers/gpu/drm/loongson/lsdc_drv.h           |  388 ++++++++++
 drivers/gpu/drm/loongson/lsdc_gem.c           |  275 +++++++
 drivers/gpu/drm/loongson/lsdc_gem.h           |   33 +
 drivers/gpu/drm/loongson/lsdc_gfxpll.c        |  199 +++++
 drivers/gpu/drm/loongson/lsdc_gfxpll.h        |   52 ++
 drivers/gpu/drm/loongson/lsdc_i2c.c           |  179 +++++
 drivers/gpu/drm/loongson/lsdc_i2c.h           |   29 +
 drivers/gpu/drm/loongson/lsdc_irq.c           |   75 ++
 drivers/gpu/drm/loongson/lsdc_irq.h           |   16 +
 drivers/gpu/drm/loongson/lsdc_output.h        |   21 +
 drivers/gpu/drm/loongson/lsdc_output_7a1000.c |  178 +++++
 drivers/gpu/drm/loongson/lsdc_output_7a2000.c |  552 +++++++++++++
 drivers/gpu/drm/loongson/lsdc_pixpll.c        |  484 ++++++++++++
 drivers/gpu/drm/loongson/lsdc_pixpll.h        |   86 +++
 drivers/gpu/drm/loongson/lsdc_plane.c         |  794 +++++++++++++++++++
 drivers/gpu/drm/loongson/lsdc_probe.c         |   56 ++
 drivers/gpu/drm/loongson/lsdc_probe.h         |   12 +
 drivers/gpu/drm/loongson/lsdc_regs.h          |  406 ++++++++++
 drivers/gpu/drm/loongson/lsdc_ttm.c           |  589 ++++++++++++++
 drivers/gpu/drm/loongson/lsdc_ttm.h           |   99 +++
 30 files changed, 6460 insertions(+)
 create mode 100644 drivers/gpu/drm/loongson/Kconfig
 create mode 100644 drivers/gpu/drm/loongson/Makefile
 create mode 100644 drivers/gpu/drm/loongson/loongson_device.c
 create mode 100644 drivers/gpu/drm/loongson/loongson_module.c
 create mode 100644 drivers/gpu/drm/loongson/loongson_module.h
 create mode 100644 drivers/gpu/drm/loongson/lsdc_benchmark.c
 create mode 100644 drivers/gpu/drm/loongson/lsdc_benchmark.h
 create mode 100644 drivers/gpu/drm/loongson/lsdc_crtc.c
 create mode 100644 drivers/gpu/drm/loongson/lsdc_debugfs.c
 create mode 100644 drivers/gpu/drm/loongson/lsdc_drv.c
 create mode 100644 drivers/gpu/drm/loongson/lsdc_drv.h
 create mode 100644 drivers/gpu/drm/loongson/lsdc_gem.c
 create mode 100644 drivers/gpu/drm/loongson/lsdc_gem.h
 create mode 100644 drivers/gpu/drm/loongson/lsdc_gfxpll.c
 create mode 100644 drivers/gpu/drm/loongson/lsdc_gfxpll.h
 create mode 100644 drivers/gpu/drm/loongson/lsdc_i2c.c
 create mode 100644 drivers/gpu/drm/loongson/lsdc_i2c.h
 create mode 100644 drivers/gpu/drm/loongson/lsdc_irq.c
 create mode 100644 drivers/gpu/drm/loongson/lsdc_irq.h
 create mode 100644 drivers/gpu/drm/loongson/lsdc_output.h
 create mode 100644 drivers/gpu/drm/loongson/lsdc_output_7a1000.c
 create mode 100644 drivers/gpu/drm/loongson/lsdc_output_7a2000.c
 create mode 100644 drivers/gpu/drm/loongson/lsdc_pixpll.c
 create mode 100644 drivers/gpu/drm/loongson/lsdc_pixpll.h
 create mode 100644 drivers/gpu/drm/loongson/lsdc_plane.c
 create mode 100644 drivers/gpu/drm/loongson/lsdc_probe.c
 create mode 100644 drivers/gpu/drm/loongson/lsdc_probe.h
 create mode 100644 drivers/gpu/drm/loongson/lsdc_regs.h
 create mode 100644 drivers/gpu/drm/loongson/lsdc_ttm.c
 create mode 100644 drivers/gpu/drm/loongson/lsdc_ttm.h

(limited to 'drivers/gpu/drm/loongson')

diff --git a/drivers/gpu/drm/loongson/Kconfig b/drivers/gpu/drm/loongson/Kconfig
new file mode 100644
index 000000000..d739d51cf
--- /dev/null
+++ b/drivers/gpu/drm/loongson/Kconfig
@@ -0,0 +1,20 @@
+# SPDX-License-Identifier: GPL-2.0
+
+config DRM_LOONGSON
+	tristate "DRM support for Loongson Graphics"
+	depends on DRM && PCI
+	depends on LOONGARCH || MIPS || COMPILE_TEST
+	select DRM_CLIENT_SELECTION
+	select DRM_KMS_HELPER
+	select DRM_TTM
+	select DRM_TTM_HELPER
+	select I2C
+	select I2C_ALGOBIT
+	help
+	  This is a DRM driver for Loongson Graphics, it may including
+	  LS7A2000, LS7A1000, LS2K2000 and LS2K1000 etc. Loongson LS7A
+	  series are bridge chipset, while Loongson LS2K series are SoC.
+
+	  If "M" is selected, the module will be called loongson.
+
+	  If in doubt, say "N".
diff --git a/drivers/gpu/drm/loongson/Makefile b/drivers/gpu/drm/loongson/Makefile
new file mode 100644
index 000000000..91e72bd90
--- /dev/null
+++ b/drivers/gpu/drm/loongson/Makefile
@@ -0,0 +1,22 @@
+# SPDX-License-Identifier: GPL-2.0
+
+loongson-y := \
+	lsdc_benchmark.o \
+	lsdc_crtc.o \
+	lsdc_debugfs.o \
+	lsdc_drv.o \
+	lsdc_gem.o \
+	lsdc_gfxpll.o \
+	lsdc_i2c.o \
+	lsdc_irq.o \
+	lsdc_output_7a1000.o \
+	lsdc_output_7a2000.o \
+	lsdc_plane.o \
+	lsdc_pixpll.o \
+	lsdc_probe.o \
+	lsdc_ttm.o
+
+loongson-y += loongson_device.o \
+	      loongson_module.o
+
+obj-$(CONFIG_DRM_LOONGSON) += loongson.o
diff --git a/drivers/gpu/drm/loongson/loongson_device.c b/drivers/gpu/drm/loongson/loongson_device.c
new file mode 100644
index 000000000..9986c8a2a
--- /dev/null
+++ b/drivers/gpu/drm/loongson/loongson_device.c
@@ -0,0 +1,102 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2023 Loongson Technology Corporation Limited
+ */
+
+#include <linux/pci.h>
+
+#include "lsdc_drv.h"
+
+static const struct lsdc_kms_funcs ls7a1000_kms_funcs = {
+	.create_i2c = lsdc_create_i2c_chan,
+	.irq_handler = ls7a1000_dc_irq_handler,
+	.output_init = ls7a1000_output_init,
+	.cursor_plane_init = ls7a1000_cursor_plane_init,
+	.primary_plane_init = lsdc_primary_plane_init,
+	.crtc_init = ls7a1000_crtc_init,
+};
+
+static const struct lsdc_kms_funcs ls7a2000_kms_funcs = {
+	.create_i2c = lsdc_create_i2c_chan,
+	.irq_handler = ls7a2000_dc_irq_handler,
+	.output_init = ls7a2000_output_init,
+	.cursor_plane_init = ls7a2000_cursor_plane_init,
+	.primary_plane_init = lsdc_primary_plane_init,
+	.crtc_init = ls7a2000_crtc_init,
+};
+
+static const struct loongson_gfx_desc ls7a1000_gfx = {
+	.dc = {
+		.num_of_crtc = 2,
+		.max_pixel_clk = 200000,
+		.max_width = 2048,
+		.max_height = 2048,
+		.num_of_hw_cursor = 1,
+		.hw_cursor_w = 32,
+		.hw_cursor_h = 32,
+		.pitch_align = 256,
+		.has_vblank_counter = false,
+		.funcs = &ls7a1000_kms_funcs,
+	},
+	.conf_reg_base = LS7A1000_CONF_REG_BASE,
+	.gfxpll = {
+		.reg_offset = LS7A1000_PLL_GFX_REG,
+		.reg_size = 8,
+	},
+	.pixpll = {
+		[0] = {
+			.reg_offset = LS7A1000_PIXPLL0_REG,
+			.reg_size = 8,
+		},
+		[1] = {
+			.reg_offset = LS7A1000_PIXPLL1_REG,
+			.reg_size = 8,
+		},
+	},
+	.chip_id = CHIP_LS7A1000,
+	.model = "LS7A1000 bridge chipset",
+};
+
+static const struct loongson_gfx_desc ls7a2000_gfx = {
+	.dc = {
+		.num_of_crtc = 2,
+		.max_pixel_clk = 350000,
+		.max_width = 4096,
+		.max_height = 4096,
+		.num_of_hw_cursor = 2,
+		.hw_cursor_w = 64,
+		.hw_cursor_h = 64,
+		.pitch_align = 64,
+		.has_vblank_counter = true,
+		.funcs = &ls7a2000_kms_funcs,
+	},
+	.conf_reg_base = LS7A2000_CONF_REG_BASE,
+	.gfxpll = {
+		.reg_offset = LS7A2000_PLL_GFX_REG,
+		.reg_size = 8,
+	},
+	.pixpll = {
+		[0] = {
+			.reg_offset = LS7A2000_PIXPLL0_REG,
+			.reg_size = 8,
+		},
+		[1] = {
+			.reg_offset = LS7A2000_PIXPLL1_REG,
+			.reg_size = 8,
+		},
+	},
+	.chip_id = CHIP_LS7A2000,
+	.model = "LS7A2000 bridge chipset",
+};
+
+static const struct lsdc_desc *__chip_id_desc_table[] = {
+	[CHIP_LS7A1000] = &ls7a1000_gfx.dc,
+	[CHIP_LS7A2000] = &ls7a2000_gfx.dc,
+	[CHIP_LS_LAST] = NULL,
+};
+
+const struct lsdc_desc *
+lsdc_device_probe(struct pci_dev *pdev, enum loongson_chip_id chip_id)
+{
+	return __chip_id_desc_table[chip_id];
+}
diff --git a/drivers/gpu/drm/loongson/loongson_module.c b/drivers/gpu/drm/loongson/loongson_module.c
new file mode 100644
index 000000000..d2a51bd39
--- /dev/null
+++ b/drivers/gpu/drm/loongson/loongson_module.c
@@ -0,0 +1,33 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2023 Loongson Technology Corporation Limited
+ */
+
+#include <linux/pci.h>
+
+#include <video/nomodeset.h>
+
+#include "loongson_module.h"
+
+static int loongson_modeset = -1;
+MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
+module_param_named(modeset, loongson_modeset, int, 0400);
+
+int loongson_vblank = 1;
+MODULE_PARM_DESC(vblank, "Disable/Enable hw vblank support");
+module_param_named(vblank, loongson_vblank, int, 0400);
+
+static int __init loongson_module_init(void)
+{
+	if (!loongson_modeset || video_firmware_drivers_only())
+		return -ENODEV;
+
+	return pci_register_driver(&lsdc_pci_driver);
+}
+module_init(loongson_module_init);
+
+static void __exit loongson_module_exit(void)
+{
+	pci_unregister_driver(&lsdc_pci_driver);
+}
+module_exit(loongson_module_exit);
diff --git a/drivers/gpu/drm/loongson/loongson_module.h b/drivers/gpu/drm/loongson/loongson_module.h
new file mode 100644
index 000000000..931c17521
--- /dev/null
+++ b/drivers/gpu/drm/loongson/loongson_module.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2023 Loongson Technology Corporation Limited
+ */
+
+#ifndef __LOONGSON_MODULE_H__
+#define __LOONGSON_MODULE_H__
+
+extern int loongson_vblank;
+extern struct pci_driver lsdc_pci_driver;
+
+#endif
diff --git a/drivers/gpu/drm/loongson/lsdc_benchmark.c b/drivers/gpu/drm/loongson/lsdc_benchmark.c
new file mode 100644
index 000000000..659173381
--- /dev/null
+++ b/drivers/gpu/drm/loongson/lsdc_benchmark.c
@@ -0,0 +1,134 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2023 Loongson Technology Corporation Limited
+ */
+
+#include <drm/drm_debugfs.h>
+#include <drm/drm_print.h>
+
+#include "lsdc_benchmark.h"
+#include "lsdc_drv.h"
+#include "lsdc_gem.h"
+#include "lsdc_ttm.h"
+
+typedef void (*lsdc_copy_proc_t)(struct lsdc_bo *src_bo,
+				 struct lsdc_bo *dst_bo,
+				 unsigned int size,
+				 int n);
+
+static void lsdc_copy_gtt_to_vram_cpu(struct lsdc_bo *src_bo,
+				      struct lsdc_bo *dst_bo,
+				      unsigned int size,
+				      int n)
+{
+	lsdc_bo_kmap(src_bo);
+	lsdc_bo_kmap(dst_bo);
+
+	while (n--)
+		memcpy_toio(dst_bo->kptr, src_bo->kptr, size);
+
+	lsdc_bo_kunmap(src_bo);
+	lsdc_bo_kunmap(dst_bo);
+}
+
+static void lsdc_copy_vram_to_gtt_cpu(struct lsdc_bo *src_bo,
+				      struct lsdc_bo *dst_bo,
+				      unsigned int size,
+				      int n)
+{
+	lsdc_bo_kmap(src_bo);
+	lsdc_bo_kmap(dst_bo);
+
+	while (n--)
+		memcpy_fromio(dst_bo->kptr, src_bo->kptr, size);
+
+	lsdc_bo_kunmap(src_bo);
+	lsdc_bo_kunmap(dst_bo);
+}
+
+static void lsdc_copy_gtt_to_gtt_cpu(struct lsdc_bo *src_bo,
+				     struct lsdc_bo *dst_bo,
+				     unsigned int size,
+				     int n)
+{
+	lsdc_bo_kmap(src_bo);
+	lsdc_bo_kmap(dst_bo);
+
+	while (n--)
+		memcpy(dst_bo->kptr, src_bo->kptr, size);
+
+	lsdc_bo_kunmap(src_bo);
+	lsdc_bo_kunmap(dst_bo);
+}
+
+static void lsdc_benchmark_copy(struct lsdc_device *ldev,
+				unsigned int size,
+				unsigned int n,
+				u32 src_domain,
+				u32 dst_domain,
+				lsdc_copy_proc_t copy_proc,
+				struct drm_printer *p)
+{
+	struct drm_device *ddev = &ldev->base;
+	struct lsdc_bo *src_bo;
+	struct lsdc_bo *dst_bo;
+	unsigned long start_jiffies;
+	unsigned long end_jiffies;
+	unsigned int throughput;
+	unsigned int time;
+
+	src_bo = lsdc_bo_create_kernel_pinned(ddev, src_domain, size);
+	dst_bo = lsdc_bo_create_kernel_pinned(ddev, dst_domain, size);
+
+	start_jiffies = jiffies;
+
+	copy_proc(src_bo, dst_bo, size, n);
+
+	end_jiffies = jiffies;
+
+	lsdc_bo_free_kernel_pinned(src_bo);
+	lsdc_bo_free_kernel_pinned(dst_bo);
+
+	time = jiffies_to_msecs(end_jiffies - start_jiffies);
+
+	throughput = (n * (size >> 10)) / time;
+
+	drm_printf(p,
+		   "Copy bo of %uKiB %u times from %s to %s in %ums: %uMB/s\n",
+		   size >> 10, n,
+		   lsdc_domain_to_str(src_domain),
+		   lsdc_domain_to_str(dst_domain),
+		   time, throughput);
+}
+
+int lsdc_show_benchmark_copy(struct lsdc_device *ldev, struct drm_printer *p)
+{
+	unsigned int buffer_size = 1920 * 1080 * 4;
+	unsigned int iteration = 60;
+
+	lsdc_benchmark_copy(ldev,
+			    buffer_size,
+			    iteration,
+			    LSDC_GEM_DOMAIN_GTT,
+			    LSDC_GEM_DOMAIN_GTT,
+			    lsdc_copy_gtt_to_gtt_cpu,
+			    p);
+
+	lsdc_benchmark_copy(ldev,
+			    buffer_size,
+			    iteration,
+			    LSDC_GEM_DOMAIN_GTT,
+			    LSDC_GEM_DOMAIN_VRAM,
+			    lsdc_copy_gtt_to_vram_cpu,
+			    p);
+
+	lsdc_benchmark_copy(ldev,
+			    buffer_size,
+			    iteration,
+			    LSDC_GEM_DOMAIN_VRAM,
+			    LSDC_GEM_DOMAIN_GTT,
+			    lsdc_copy_vram_to_gtt_cpu,
+			    p);
+
+	return 0;
+}
diff --git a/drivers/gpu/drm/loongson/lsdc_benchmark.h b/drivers/gpu/drm/loongson/lsdc_benchmark.h
new file mode 100644
index 000000000..361102782
--- /dev/null
+++ b/drivers/gpu/drm/loongson/lsdc_benchmark.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2023 Loongson Technology Corporation Limited
+ */
+
+#ifndef __LSDC_BENCHMARK_H__
+#define __LSDC_BENCHMARK_H__
+
+#include "lsdc_drv.h"
+
+int lsdc_show_benchmark_copy(struct lsdc_device *ldev, struct drm_printer *p);
+
+#endif
diff --git a/drivers/gpu/drm/loongson/lsdc_crtc.c b/drivers/gpu/drm/loongson/lsdc_crtc.c
new file mode 100644
index 000000000..16b8f36a4
--- /dev/null
+++ b/drivers/gpu/drm/loongson/lsdc_crtc.c
@@ -0,0 +1,1026 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2023 Loongson Technology Corporation Limited
+ */
+
+#include <linux/debugfs.h>
+#include <linux/delay.h>
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_debugfs.h>
+#include <drm/drm_print.h>
+#include <drm/drm_vblank.h>
+
+#include "lsdc_drv.h"
+
+/*
+ * After the CRTC soft reset, the vblank counter would be reset to zero.
+ * But the address and other settings in the CRTC register remain the same
+ * as before.
+ */
+
+static void lsdc_crtc0_soft_reset(struct lsdc_crtc *lcrtc)
+{
+	struct lsdc_device *ldev = lcrtc->ldev;
+	u32 val;
+
+	val = lsdc_rreg32(ldev, LSDC_CRTC0_CFG_REG);
+
+	val &= CFG_VALID_BITS_MASK;
+
+	/* Soft reset bit, active low */
+	val &= ~CFG_RESET_N;
+
+	val &= ~CFG_PIX_FMT_MASK;
+
+	lsdc_wreg32(ldev, LSDC_CRTC0_CFG_REG, val);
+
+	udelay(1);
+
+	val |= CFG_RESET_N | LSDC_PF_XRGB8888 | CFG_OUTPUT_ENABLE;
+
+	lsdc_wreg32(ldev, LSDC_CRTC0_CFG_REG, val);
+
+	/* Wait about a vblank time */
+	mdelay(20);
+}
+
+static void lsdc_crtc1_soft_reset(struct lsdc_crtc *lcrtc)
+{
+	struct lsdc_device *ldev = lcrtc->ldev;
+	u32 val;
+
+	val = lsdc_rreg32(ldev, LSDC_CRTC1_CFG_REG);
+
+	val &= CFG_VALID_BITS_MASK;
+
+	/* Soft reset bit, active low */
+	val &= ~CFG_RESET_N;
+
+	val &= ~CFG_PIX_FMT_MASK;
+
+	lsdc_wreg32(ldev, LSDC_CRTC1_CFG_REG, val);
+
+	udelay(1);
+
+	val |= CFG_RESET_N | LSDC_PF_XRGB8888 | CFG_OUTPUT_ENABLE;
+
+	lsdc_wreg32(ldev, LSDC_CRTC1_CFG_REG, val);
+
+	/* Wait about a vblank time */
+	msleep(20);
+}
+
+static void lsdc_crtc0_enable(struct lsdc_crtc *lcrtc)
+{
+	struct lsdc_device *ldev = lcrtc->ldev;
+	u32 val;
+
+	val = lsdc_rreg32(ldev, LSDC_CRTC0_CFG_REG);
+
+	/*
+	 * This may happen in extremely rare cases, but a soft reset can
+	 * bring it back to normal. We add a warning here, hoping to catch
+	 * something if it happens.
+	 */
+	if (val & CRTC_ANCHORED) {
+		drm_warn(&ldev->base, "%s stall\n", lcrtc->base.name);
+		return lsdc_crtc0_soft_reset(lcrtc);
+	}
+
+	lsdc_wreg32(ldev, LSDC_CRTC0_CFG_REG, val | CFG_OUTPUT_ENABLE);
+}
+
+static void lsdc_crtc0_disable(struct lsdc_crtc *lcrtc)
+{
+	struct lsdc_device *ldev = lcrtc->ldev;
+
+	lsdc_ureg32_clr(ldev, LSDC_CRTC0_CFG_REG, CFG_OUTPUT_ENABLE);
+
+	udelay(9);
+}
+
+static void lsdc_crtc1_enable(struct lsdc_crtc *lcrtc)
+{
+	struct lsdc_device *ldev = lcrtc->ldev;
+	u32 val;
+
+	/*
+	 * This may happen in extremely rare cases, but a soft reset can
+	 * bring it back to normal. We add a warning here, hoping to catch
+	 * something if it happens.
+	 */
+	val = lsdc_rreg32(ldev, LSDC_CRTC1_CFG_REG);
+	if (val & CRTC_ANCHORED) {
+		drm_warn(&ldev->base, "%s stall\n", lcrtc->base.name);
+		return lsdc_crtc1_soft_reset(lcrtc);
+	}
+
+	lsdc_wreg32(ldev, LSDC_CRTC1_CFG_REG, val | CFG_OUTPUT_ENABLE);
+}
+
+static void lsdc_crtc1_disable(struct lsdc_crtc *lcrtc)
+{
+	struct lsdc_device *ldev = lcrtc->ldev;
+
+	lsdc_ureg32_clr(ldev, LSDC_CRTC1_CFG_REG, CFG_OUTPUT_ENABLE);
+
+	udelay(9);
+}
+
+/* All Loongson display controllers have hardware scanout position recoders */
+
+static void lsdc_crtc0_scan_pos(struct lsdc_crtc *lcrtc, int *hpos, int *vpos)
+{
+	struct lsdc_device *ldev = lcrtc->ldev;
+	u32 val;
+
+	val = lsdc_rreg32(ldev, LSDC_CRTC0_SCAN_POS_REG);
+
+	*hpos = val >> 16;
+	*vpos = val & 0xffff;
+}
+
+static void lsdc_crtc1_scan_pos(struct lsdc_crtc *lcrtc, int *hpos, int *vpos)
+{
+	struct lsdc_device *ldev = lcrtc->ldev;
+	u32 val;
+
+	val = lsdc_rreg32(ldev, LSDC_CRTC1_SCAN_POS_REG);
+
+	*hpos = val >> 16;
+	*vpos = val & 0xffff;
+}
+
+static void lsdc_crtc0_enable_vblank(struct lsdc_crtc *lcrtc)
+{
+	struct lsdc_device *ldev = lcrtc->ldev;
+
+	lsdc_ureg32_set(ldev, LSDC_INT_REG, INT_CRTC0_VSYNC_EN);
+}
+
+static void lsdc_crtc0_disable_vblank(struct lsdc_crtc *lcrtc)
+{
+	struct lsdc_device *ldev = lcrtc->ldev;
+
+	lsdc_ureg32_clr(ldev, LSDC_INT_REG, INT_CRTC0_VSYNC_EN);
+}
+
+static void lsdc_crtc1_enable_vblank(struct lsdc_crtc *lcrtc)
+{
+	struct lsdc_device *ldev = lcrtc->ldev;
+
+	lsdc_ureg32_set(ldev, LSDC_INT_REG, INT_CRTC1_VSYNC_EN);
+}
+
+static void lsdc_crtc1_disable_vblank(struct lsdc_crtc *lcrtc)
+{
+	struct lsdc_device *ldev = lcrtc->ldev;
+
+	lsdc_ureg32_clr(ldev, LSDC_INT_REG, INT_CRTC1_VSYNC_EN);
+}
+
+static void lsdc_crtc0_flip(struct lsdc_crtc *lcrtc)
+{
+	struct lsdc_device *ldev = lcrtc->ldev;
+
+	lsdc_ureg32_set(ldev, LSDC_CRTC0_CFG_REG, CFG_PAGE_FLIP);
+}
+
+static void lsdc_crtc1_flip(struct lsdc_crtc *lcrtc)
+{
+	struct lsdc_device *ldev = lcrtc->ldev;
+
+	lsdc_ureg32_set(ldev, LSDC_CRTC1_CFG_REG, CFG_PAGE_FLIP);
+}
+
+/*
+ * CRTC0 clone from CRTC1 or CRTC1 clone from CRTC0 using hardware logic
+ * This may be useful for custom cloning (TWIN) applications. Saving the
+ * bandwidth compared with the clone (mirroring) display mode provided by
+ * drm core.
+ */
+
+static void lsdc_crtc0_clone(struct lsdc_crtc *lcrtc)
+{
+	struct lsdc_device *ldev = lcrtc->ldev;
+
+	lsdc_ureg32_set(ldev, LSDC_CRTC0_CFG_REG, CFG_HW_CLONE);
+}
+
+static void lsdc_crtc1_clone(struct lsdc_crtc *lcrtc)
+{
+	struct lsdc_device *ldev = lcrtc->ldev;
+
+	lsdc_ureg32_set(ldev, LSDC_CRTC1_CFG_REG, CFG_HW_CLONE);
+}
+
+static void lsdc_crtc0_set_mode(struct lsdc_crtc *lcrtc,
+				const struct drm_display_mode *mode)
+{
+	struct lsdc_device *ldev = lcrtc->ldev;
+
+	lsdc_wreg32(ldev, LSDC_CRTC0_HDISPLAY_REG,
+		    (mode->crtc_htotal << 16) | mode->crtc_hdisplay);
+
+	lsdc_wreg32(ldev, LSDC_CRTC0_VDISPLAY_REG,
+		    (mode->crtc_vtotal << 16) | mode->crtc_vdisplay);
+
+	lsdc_wreg32(ldev, LSDC_CRTC0_HSYNC_REG,
+		    (mode->crtc_hsync_end << 16) | mode->crtc_hsync_start | HSYNC_EN);
+
+	lsdc_wreg32(ldev, LSDC_CRTC0_VSYNC_REG,
+		    (mode->crtc_vsync_end << 16) | mode->crtc_vsync_start | VSYNC_EN);
+}
+
+static void lsdc_crtc1_set_mode(struct lsdc_crtc *lcrtc,
+				const struct drm_display_mode *mode)
+{
+	struct lsdc_device *ldev = lcrtc->ldev;
+
+	lsdc_wreg32(ldev, LSDC_CRTC1_HDISPLAY_REG,
+		    (mode->crtc_htotal << 16) | mode->crtc_hdisplay);
+
+	lsdc_wreg32(ldev, LSDC_CRTC1_VDISPLAY_REG,
+		    (mode->crtc_vtotal << 16) | mode->crtc_vdisplay);
+
+	lsdc_wreg32(ldev, LSDC_CRTC1_HSYNC_REG,
+		    (mode->crtc_hsync_end << 16) | mode->crtc_hsync_start | HSYNC_EN);
+
+	lsdc_wreg32(ldev, LSDC_CRTC1_VSYNC_REG,
+		    (mode->crtc_vsync_end << 16) | mode->crtc_vsync_start | VSYNC_EN);
+}
+
+/*
+ * This is required for S3 support.
+ * After resuming from suspend, LSDC_CRTCx_CFG_REG (x = 0 or 1) is filled
+ * with garbage value, which causes the CRTC hang there.
+ *
+ * This function provides minimal settings for the affected registers.
+ * This overrides the firmware's settings on startup, making the CRTC work
+ * on our own, similar to the functional of GPU POST (Power On Self Test).
+ * Only touch CRTC hardware-related parts.
+ */
+
+static void lsdc_crtc0_reset(struct lsdc_crtc *lcrtc)
+{
+	struct lsdc_device *ldev = lcrtc->ldev;
+
+	lsdc_wreg32(ldev, LSDC_CRTC0_CFG_REG, CFG_RESET_N | LSDC_PF_XRGB8888);
+}
+
+static void lsdc_crtc1_reset(struct lsdc_crtc *lcrtc)
+{
+	struct lsdc_device *ldev = lcrtc->ldev;
+
+	lsdc_wreg32(ldev, LSDC_CRTC1_CFG_REG, CFG_RESET_N | LSDC_PF_XRGB8888);
+}
+
+static const struct lsdc_crtc_hw_ops ls7a1000_crtc_hw_ops[2] = {
+	{
+		.enable = lsdc_crtc0_enable,
+		.disable = lsdc_crtc0_disable,
+		.enable_vblank = lsdc_crtc0_enable_vblank,
+		.disable_vblank = lsdc_crtc0_disable_vblank,
+		.flip = lsdc_crtc0_flip,
+		.clone = lsdc_crtc0_clone,
+		.set_mode = lsdc_crtc0_set_mode,
+		.get_scan_pos = lsdc_crtc0_scan_pos,
+		.soft_reset = lsdc_crtc0_soft_reset,
+		.reset = lsdc_crtc0_reset,
+	},
+	{
+		.enable = lsdc_crtc1_enable,
+		.disable = lsdc_crtc1_disable,
+		.enable_vblank = lsdc_crtc1_enable_vblank,
+		.disable_vblank = lsdc_crtc1_disable_vblank,
+		.flip = lsdc_crtc1_flip,
+		.clone = lsdc_crtc1_clone,
+		.set_mode = lsdc_crtc1_set_mode,
+		.get_scan_pos = lsdc_crtc1_scan_pos,
+		.soft_reset = lsdc_crtc1_soft_reset,
+		.reset = lsdc_crtc1_reset,
+	},
+};
+
+/*
+ * The 32-bit hardware vblank counter has been available since LS7A2000
+ * and LS2K2000. The counter increases even though the CRTC is disabled,
+ * it will be reset only if the CRTC is being soft reset.
+ * Those registers are also readable for ls7a1000, but its value does not
+ * change.
+ */
+
+static u32 lsdc_crtc0_get_vblank_count(struct lsdc_crtc *lcrtc)
+{
+	struct lsdc_device *ldev = lcrtc->ldev;
+
+	return lsdc_rreg32(ldev, LSDC_CRTC0_VSYNC_COUNTER_REG);
+}
+
+static u32 lsdc_crtc1_get_vblank_count(struct lsdc_crtc *lcrtc)
+{
+	struct lsdc_device *ldev = lcrtc->ldev;
+
+	return lsdc_rreg32(ldev, LSDC_CRTC1_VSYNC_COUNTER_REG);
+}
+
+/*
+ * The DMA step bit fields are available since LS7A2000/LS2K2000, for
+ * supporting odd resolutions. But a large DMA step save the bandwidth.
+ * The larger, the better. Behavior of writing those bits on LS7A1000
+ * or LS2K1000 is underfined.
+ */
+
+static void lsdc_crtc0_set_dma_step(struct lsdc_crtc *lcrtc,
+				    enum lsdc_dma_steps dma_step)
+{
+	struct lsdc_device *ldev = lcrtc->ldev;
+	u32 val = lsdc_rreg32(ldev, LSDC_CRTC0_CFG_REG);
+
+	val &= ~CFG_DMA_STEP_MASK;
+	val |= dma_step << CFG_DMA_STEP_SHIFT;
+
+	lsdc_wreg32(ldev, LSDC_CRTC0_CFG_REG, val);
+}
+
+static void lsdc_crtc1_set_dma_step(struct lsdc_crtc *lcrtc,
+				    enum lsdc_dma_steps dma_step)
+{
+	struct lsdc_device *ldev = lcrtc->ldev;
+	u32 val = lsdc_rreg32(ldev, LSDC_CRTC1_CFG_REG);
+
+	val &= ~CFG_DMA_STEP_MASK;
+	val |= dma_step << CFG_DMA_STEP_SHIFT;
+
+	lsdc_wreg32(ldev, LSDC_CRTC1_CFG_REG, val);
+}
+
+static const struct lsdc_crtc_hw_ops ls7a2000_crtc_hw_ops[2] = {
+	{
+		.enable = lsdc_crtc0_enable,
+		.disable = lsdc_crtc0_disable,
+		.enable_vblank = lsdc_crtc0_enable_vblank,
+		.disable_vblank = lsdc_crtc0_disable_vblank,
+		.flip = lsdc_crtc0_flip,
+		.clone = lsdc_crtc0_clone,
+		.set_mode = lsdc_crtc0_set_mode,
+		.soft_reset = lsdc_crtc0_soft_reset,
+		.get_scan_pos = lsdc_crtc0_scan_pos,
+		.set_dma_step = lsdc_crtc0_set_dma_step,
+		.get_vblank_counter = lsdc_crtc0_get_vblank_count,
+		.reset = lsdc_crtc0_reset,
+	},
+	{
+		.enable = lsdc_crtc1_enable,
+		.disable = lsdc_crtc1_disable,
+		.enable_vblank = lsdc_crtc1_enable_vblank,
+		.disable_vblank = lsdc_crtc1_disable_vblank,
+		.flip = lsdc_crtc1_flip,
+		.clone = lsdc_crtc1_clone,
+		.set_mode = lsdc_crtc1_set_mode,
+		.get_scan_pos = lsdc_crtc1_scan_pos,
+		.soft_reset = lsdc_crtc1_soft_reset,
+		.set_dma_step = lsdc_crtc1_set_dma_step,
+		.get_vblank_counter = lsdc_crtc1_get_vblank_count,
+		.reset = lsdc_crtc1_reset,
+	},
+};
+
+static void lsdc_crtc_reset(struct drm_crtc *crtc)
+{
+	struct lsdc_crtc *lcrtc = to_lsdc_crtc(crtc);
+	const struct lsdc_crtc_hw_ops *ops = lcrtc->hw_ops;
+	struct lsdc_crtc_state *priv_crtc_state;
+
+	if (crtc->state)
+		crtc->funcs->atomic_destroy_state(crtc, crtc->state);
+
+	priv_crtc_state = kzalloc_obj(*priv_crtc_state);
+
+	if (!priv_crtc_state)
+		__drm_atomic_helper_crtc_reset(crtc, NULL);
+	else
+		__drm_atomic_helper_crtc_reset(crtc, &priv_crtc_state->base);
+
+	/* Reset the CRTC hardware, this is required for S3 support */
+	ops->reset(lcrtc);
+}
+
+static void lsdc_crtc_atomic_destroy_state(struct drm_crtc *crtc,
+					   struct drm_crtc_state *state)
+{
+	struct lsdc_crtc_state *priv_state = to_lsdc_crtc_state(state);
+
+	__drm_atomic_helper_crtc_destroy_state(&priv_state->base);
+
+	kfree(priv_state);
+}
+
+static struct drm_crtc_state *
+lsdc_crtc_atomic_duplicate_state(struct drm_crtc *crtc)
+{
+	struct lsdc_crtc_state *new_priv_state;
+	struct lsdc_crtc_state *old_priv_state;
+
+	new_priv_state = kzalloc_obj(*new_priv_state);
+	if (!new_priv_state)
+		return NULL;
+
+	__drm_atomic_helper_crtc_duplicate_state(crtc, &new_priv_state->base);
+
+	old_priv_state = to_lsdc_crtc_state(crtc->state);
+
+	memcpy(&new_priv_state->pparms, &old_priv_state->pparms,
+	       sizeof(new_priv_state->pparms));
+
+	return &new_priv_state->base;
+}
+
+static u32 lsdc_crtc_get_vblank_counter(struct drm_crtc *crtc)
+{
+	struct lsdc_crtc *lcrtc = to_lsdc_crtc(crtc);
+
+	/* 32-bit hardware vblank counter */
+	return lcrtc->hw_ops->get_vblank_counter(lcrtc);
+}
+
+static int lsdc_crtc_enable_vblank(struct drm_crtc *crtc)
+{
+	struct lsdc_crtc *lcrtc = to_lsdc_crtc(crtc);
+
+	if (!lcrtc->has_vblank)
+		return -EINVAL;
+
+	lcrtc->hw_ops->enable_vblank(lcrtc);
+
+	return 0;
+}
+
+static void lsdc_crtc_disable_vblank(struct drm_crtc *crtc)
+{
+	struct lsdc_crtc *lcrtc = to_lsdc_crtc(crtc);
+
+	if (!lcrtc->has_vblank)
+		return;
+
+	lcrtc->hw_ops->disable_vblank(lcrtc);
+}
+
+/*
+ * CRTC related debugfs
+ * Primary planes and cursor planes belong to the CRTC as well.
+ * For the sake of convenience, plane-related registers are also add here.
+ */
+
+#define REG_DEF(reg) { \
+	.name = __stringify_1(LSDC_##reg##_REG), \
+	.offset = LSDC_##reg##_REG, \
+}
+
+static const struct lsdc_reg32 lsdc_crtc_regs_array[2][21] = {
+	[0] = {
+		REG_DEF(CRTC0_CFG),
+		REG_DEF(CRTC0_FB_ORIGIN),
+		REG_DEF(CRTC0_DVO_CONF),
+		REG_DEF(CRTC0_HDISPLAY),
+		REG_DEF(CRTC0_HSYNC),
+		REG_DEF(CRTC0_VDISPLAY),
+		REG_DEF(CRTC0_VSYNC),
+		REG_DEF(CRTC0_GAMMA_INDEX),
+		REG_DEF(CRTC0_GAMMA_DATA),
+		REG_DEF(CRTC0_SYNC_DEVIATION),
+		REG_DEF(CRTC0_VSYNC_COUNTER),
+		REG_DEF(CRTC0_SCAN_POS),
+		REG_DEF(CRTC0_STRIDE),
+		REG_DEF(CRTC0_FB1_ADDR_HI),
+		REG_DEF(CRTC0_FB1_ADDR_LO),
+		REG_DEF(CRTC0_FB0_ADDR_HI),
+		REG_DEF(CRTC0_FB0_ADDR_LO),
+		REG_DEF(CURSOR0_CFG),
+		REG_DEF(CURSOR0_POSITION),
+		REG_DEF(CURSOR0_BG_COLOR),
+		REG_DEF(CURSOR0_FG_COLOR),
+	},
+	[1] = {
+		REG_DEF(CRTC1_CFG),
+		REG_DEF(CRTC1_FB_ORIGIN),
+		REG_DEF(CRTC1_DVO_CONF),
+		REG_DEF(CRTC1_HDISPLAY),
+		REG_DEF(CRTC1_HSYNC),
+		REG_DEF(CRTC1_VDISPLAY),
+		REG_DEF(CRTC1_VSYNC),
+		REG_DEF(CRTC1_GAMMA_INDEX),
+		REG_DEF(CRTC1_GAMMA_DATA),
+		REG_DEF(CRTC1_SYNC_DEVIATION),
+		REG_DEF(CRTC1_VSYNC_COUNTER),
+		REG_DEF(CRTC1_SCAN_POS),
+		REG_DEF(CRTC1_STRIDE),
+		REG_DEF(CRTC1_FB1_ADDR_HI),
+		REG_DEF(CRTC1_FB1_ADDR_LO),
+		REG_DEF(CRTC1_FB0_ADDR_HI),
+		REG_DEF(CRTC1_FB0_ADDR_LO),
+		REG_DEF(CURSOR1_CFG),
+		REG_DEF(CURSOR1_POSITION),
+		REG_DEF(CURSOR1_BG_COLOR),
+		REG_DEF(CURSOR1_FG_COLOR),
+	},
+};
+
+static int lsdc_crtc_show_regs(struct seq_file *m, void *arg)
+{
+	struct drm_info_node *node = (struct drm_info_node *)m->private;
+	struct lsdc_crtc *lcrtc = (struct lsdc_crtc *)node->info_ent->data;
+	struct lsdc_device *ldev = lcrtc->ldev;
+	unsigned int i;
+
+	for (i = 0; i < lcrtc->nreg; i++) {
+		const struct lsdc_reg32 *preg = &lcrtc->preg[i];
+		u32 offset = preg->offset;
+
+		seq_printf(m, "%s (0x%04x): 0x%08x\n",
+			   preg->name, offset, lsdc_rreg32(ldev, offset));
+	}
+
+	return 0;
+}
+
+static int lsdc_crtc_show_scan_position(struct seq_file *m, void *arg)
+{
+	struct drm_info_node *node = (struct drm_info_node *)m->private;
+	struct lsdc_crtc *lcrtc = (struct lsdc_crtc *)node->info_ent->data;
+	int x, y;
+
+	lcrtc->hw_ops->get_scan_pos(lcrtc, &x, &y);
+	seq_printf(m, "Scanout position: x: %08u, y: %08u\n", x, y);
+
+	return 0;
+}
+
+static int lsdc_crtc_show_vblank_counter(struct seq_file *m, void *arg)
+{
+	struct drm_info_node *node = (struct drm_info_node *)m->private;
+	struct lsdc_crtc *lcrtc = (struct lsdc_crtc *)node->info_ent->data;
+
+	if (lcrtc->hw_ops->get_vblank_counter)
+		seq_printf(m, "%s vblank counter: %08u\n\n", lcrtc->base.name,
+			   lcrtc->hw_ops->get_vblank_counter(lcrtc));
+
+	return 0;
+}
+
+static int lsdc_pixpll_show_clock(struct seq_file *m, void *arg)
+{
+	struct drm_info_node *node = (struct drm_info_node *)m->private;
+	struct lsdc_crtc *lcrtc = (struct lsdc_crtc *)node->info_ent->data;
+	struct lsdc_pixpll *pixpll = &lcrtc->pixpll;
+	const struct lsdc_pixpll_funcs *funcs = pixpll->funcs;
+	struct drm_crtc *crtc = &lcrtc->base;
+	struct drm_display_mode *mode = &crtc->state->mode;
+	struct drm_printer printer = drm_seq_file_printer(m);
+	unsigned int out_khz;
+
+	out_khz = funcs->get_rate(pixpll);
+
+	seq_printf(m, "%s: %dx%d@%d\n", crtc->name,
+		   mode->hdisplay, mode->vdisplay, drm_mode_vrefresh(mode));
+
+	seq_printf(m, "Pixel clock required: %d kHz\n", mode->clock);
+	seq_printf(m, "Actual frequency output: %u kHz\n", out_khz);
+	seq_printf(m, "Diff: %d kHz\n", out_khz - mode->clock);
+
+	funcs->print(pixpll, &printer);
+
+	return 0;
+}
+
+static struct drm_info_list lsdc_crtc_debugfs_list[2][4] = {
+	[0] = {
+		{ "regs", lsdc_crtc_show_regs, 0, NULL },
+		{ "pixclk", lsdc_pixpll_show_clock, 0, NULL },
+		{ "scanpos", lsdc_crtc_show_scan_position, 0, NULL },
+		{ "vblanks", lsdc_crtc_show_vblank_counter, 0, NULL },
+	},
+	[1] = {
+		{ "regs", lsdc_crtc_show_regs, 0, NULL },
+		{ "pixclk", lsdc_pixpll_show_clock, 0, NULL },
+		{ "scanpos", lsdc_crtc_show_scan_position, 0, NULL },
+		{ "vblanks", lsdc_crtc_show_vblank_counter, 0, NULL },
+	},
+};
+
+/* operate manually */
+
+static int lsdc_crtc_man_op_show(struct seq_file *m, void *data)
+{
+	seq_puts(m, "soft_reset: soft reset this CRTC\n");
+	seq_puts(m, "enable: enable this CRTC\n");
+	seq_puts(m, "disable: disable this CRTC\n");
+	seq_puts(m, "flip: trigger the page flip\n");
+	seq_puts(m, "clone: clone the another crtc with hardware logic\n");
+
+	return 0;
+}
+
+static int lsdc_crtc_man_op_open(struct inode *inode, struct file *file)
+{
+	struct drm_crtc *crtc = inode->i_private;
+
+	return single_open(file, lsdc_crtc_man_op_show, crtc);
+}
+
+static ssize_t lsdc_crtc_man_op_write(struct file *file,
+				      const char __user *ubuf,
+				      size_t len,
+				      loff_t *offp)
+{
+	struct seq_file *m = file->private_data;
+	struct lsdc_crtc *lcrtc = m->private;
+	const struct lsdc_crtc_hw_ops *ops = lcrtc->hw_ops;
+	char buf[16];
+
+	if (len > sizeof(buf) - 1)
+		return -EINVAL;
+
+	if (copy_from_user(buf, ubuf, len))
+		return -EFAULT;
+
+	buf[len] = '\0';
+
+	if (sysfs_streq(buf, "soft_reset"))
+		ops->soft_reset(lcrtc);
+	else if (sysfs_streq(buf, "enable"))
+		ops->enable(lcrtc);
+	else if (sysfs_streq(buf, "disable"))
+		ops->disable(lcrtc);
+	else if (sysfs_streq(buf, "flip"))
+		ops->flip(lcrtc);
+	else if (sysfs_streq(buf, "clone"))
+		ops->clone(lcrtc);
+
+	return len;
+}
+
+static const struct file_operations lsdc_crtc_man_op_fops = {
+	.owner = THIS_MODULE,
+	.open = lsdc_crtc_man_op_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+	.write = lsdc_crtc_man_op_write,
+};
+
+static int lsdc_crtc_late_register(struct drm_crtc *crtc)
+{
+	struct lsdc_display_pipe *dispipe = crtc_to_display_pipe(crtc);
+	struct lsdc_crtc *lcrtc = to_lsdc_crtc(crtc);
+	struct drm_minor *minor = crtc->dev->primary;
+	unsigned int index = dispipe->index;
+	unsigned int i;
+
+	lcrtc->preg = lsdc_crtc_regs_array[index];
+	lcrtc->nreg = ARRAY_SIZE(lsdc_crtc_regs_array[index]);
+	lcrtc->p_info_list = lsdc_crtc_debugfs_list[index];
+	lcrtc->n_info_list = ARRAY_SIZE(lsdc_crtc_debugfs_list[index]);
+
+	for (i = 0; i < lcrtc->n_info_list; ++i)
+		lcrtc->p_info_list[i].data = lcrtc;
+
+	drm_debugfs_create_files(lcrtc->p_info_list, lcrtc->n_info_list,
+				 crtc->debugfs_entry, minor);
+
+	/* Manual operations supported */
+	debugfs_create_file("ops", 0644, crtc->debugfs_entry, lcrtc,
+			    &lsdc_crtc_man_op_fops);
+
+	return 0;
+}
+
+static void lsdc_crtc_atomic_print_state(struct drm_printer *p,
+					 const struct drm_crtc_state *state)
+{
+	const struct lsdc_crtc_state *priv_state;
+	const struct lsdc_pixpll_parms *pparms;
+
+	priv_state = container_of_const(state, struct lsdc_crtc_state, base);
+	pparms = &priv_state->pparms;
+
+	drm_printf(p, "\tInput clock divider = %u\n", pparms->div_ref);
+	drm_printf(p, "\tMedium clock multiplier = %u\n", pparms->loopc);
+	drm_printf(p, "\tOutput clock divider = %u\n", pparms->div_out);
+}
+
+static const struct drm_crtc_funcs ls7a1000_crtc_funcs = {
+	.reset = lsdc_crtc_reset,
+	.destroy = drm_crtc_cleanup,
+	.set_config = drm_atomic_helper_set_config,
+	.page_flip = drm_atomic_helper_page_flip,
+	.atomic_duplicate_state = lsdc_crtc_atomic_duplicate_state,
+	.atomic_destroy_state = lsdc_crtc_atomic_destroy_state,
+	.late_register = lsdc_crtc_late_register,
+	.enable_vblank = lsdc_crtc_enable_vblank,
+	.disable_vblank = lsdc_crtc_disable_vblank,
+	.get_vblank_timestamp = drm_crtc_vblank_helper_get_vblank_timestamp,
+	.atomic_print_state = lsdc_crtc_atomic_print_state,
+};
+
+static const struct drm_crtc_funcs ls7a2000_crtc_funcs = {
+	.reset = lsdc_crtc_reset,
+	.destroy = drm_crtc_cleanup,
+	.set_config = drm_atomic_helper_set_config,
+	.page_flip = drm_atomic_helper_page_flip,
+	.atomic_duplicate_state = lsdc_crtc_atomic_duplicate_state,
+	.atomic_destroy_state = lsdc_crtc_atomic_destroy_state,
+	.late_register = lsdc_crtc_late_register,
+	.get_vblank_counter = lsdc_crtc_get_vblank_counter,
+	.enable_vblank = lsdc_crtc_enable_vblank,
+	.disable_vblank = lsdc_crtc_disable_vblank,
+	.get_vblank_timestamp = drm_crtc_vblank_helper_get_vblank_timestamp,
+	.atomic_print_state = lsdc_crtc_atomic_print_state,
+};
+
+static enum drm_mode_status
+lsdc_crtc_mode_valid(struct drm_crtc *crtc, const struct drm_display_mode *mode)
+{
+	struct drm_device *ddev = crtc->dev;
+	struct lsdc_device *ldev = to_lsdc(ddev);
+	const struct lsdc_desc *descp = ldev->descp;
+	unsigned int pitch;
+
+	if (mode->hdisplay > descp->max_width)
+		return MODE_BAD_HVALUE;
+
+	if (mode->vdisplay > descp->max_height)
+		return MODE_BAD_VVALUE;
+
+	if (mode->clock > descp->max_pixel_clk) {
+		drm_dbg_kms(ddev, "mode %dx%d, pixel clock=%d is too high\n",
+			    mode->hdisplay, mode->vdisplay, mode->clock);
+		return MODE_CLOCK_HIGH;
+	}
+
+	/* 4 for DRM_FORMAT_XRGB8888 */
+	pitch = mode->hdisplay * 4;
+
+	if (pitch % descp->pitch_align) {
+		drm_dbg_kms(ddev, "align to %u bytes is required: %u\n",
+			    descp->pitch_align, pitch);
+		return MODE_BAD_WIDTH;
+	}
+
+	return MODE_OK;
+}
+
+static int lsdc_pixpll_atomic_check(struct drm_crtc *crtc,
+				    struct drm_crtc_state *state)
+{
+	struct lsdc_crtc *lcrtc = to_lsdc_crtc(crtc);
+	struct lsdc_pixpll *pixpll = &lcrtc->pixpll;
+	const struct lsdc_pixpll_funcs *pfuncs = pixpll->funcs;
+	struct lsdc_crtc_state *priv_state = to_lsdc_crtc_state(state);
+	unsigned int clock = state->mode.clock;
+	int ret;
+
+	ret = pfuncs->compute(pixpll, clock, &priv_state->pparms);
+	if (ret) {
+		drm_warn(crtc->dev, "Failed to find PLL params for %ukHz\n",
+			 clock);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int lsdc_crtc_helper_atomic_check(struct drm_crtc *crtc,
+					 struct drm_atomic_commit *state)
+{
+	struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
+
+	if (!crtc_state->enable)
+		return 0;
+
+	return lsdc_pixpll_atomic_check(crtc, crtc_state);
+}
+
+static void lsdc_crtc_mode_set_nofb(struct drm_crtc *crtc)
+{
+	struct lsdc_crtc *lcrtc = to_lsdc_crtc(crtc);
+	const struct lsdc_crtc_hw_ops *crtc_hw_ops = lcrtc->hw_ops;
+	struct lsdc_pixpll *pixpll = &lcrtc->pixpll;
+	const struct lsdc_pixpll_funcs *pixpll_funcs = pixpll->funcs;
+	struct drm_crtc_state *state = crtc->state;
+	struct drm_display_mode *mode = &state->mode;
+	struct lsdc_crtc_state *priv_state = to_lsdc_crtc_state(state);
+
+	pixpll_funcs->update(pixpll, &priv_state->pparms);
+
+	if (crtc_hw_ops->set_dma_step) {
+		unsigned int width_in_bytes = mode->hdisplay * 4;
+		enum lsdc_dma_steps dma_step;
+
+		/*
+		 * Using DMA step as large as possible, for improving
+		 * hardware DMA efficiency.
+		 */
+		if (width_in_bytes % 256 == 0)
+			dma_step = LSDC_DMA_STEP_256_BYTES;
+		else if (width_in_bytes % 128 == 0)
+			dma_step = LSDC_DMA_STEP_128_BYTES;
+		else if (width_in_bytes % 64 == 0)
+			dma_step = LSDC_DMA_STEP_64_BYTES;
+		else  /* width_in_bytes % 32 == 0 */
+			dma_step = LSDC_DMA_STEP_32_BYTES;
+
+		crtc_hw_ops->set_dma_step(lcrtc, dma_step);
+	}
+
+	crtc_hw_ops->set_mode(lcrtc, mode);
+}
+
+static void lsdc_crtc_send_vblank(struct drm_crtc *crtc)
+{
+	struct drm_device *ddev = crtc->dev;
+	unsigned long flags;
+
+	if (!crtc->state || !crtc->state->event)
+		return;
+
+	drm_dbg(ddev, "Send vblank manually\n");
+
+	spin_lock_irqsave(&ddev->event_lock, flags);
+	drm_crtc_send_vblank_event(crtc, crtc->state->event);
+	crtc->state->event = NULL;
+	spin_unlock_irqrestore(&ddev->event_lock, flags);
+}
+
+static void lsdc_crtc_atomic_enable(struct drm_crtc *crtc,
+				    struct drm_atomic_commit *state)
+{
+	struct lsdc_crtc *lcrtc = to_lsdc_crtc(crtc);
+
+	if (lcrtc->has_vblank)
+		drm_crtc_vblank_on(crtc);
+
+	lcrtc->hw_ops->enable(lcrtc);
+}
+
+static void lsdc_crtc_atomic_disable(struct drm_crtc *crtc,
+				     struct drm_atomic_commit *state)
+{
+	struct lsdc_crtc *lcrtc = to_lsdc_crtc(crtc);
+
+	if (lcrtc->has_vblank)
+		drm_crtc_vblank_off(crtc);
+
+	lcrtc->hw_ops->disable(lcrtc);
+
+	/*
+	 * Make sure we issue a vblank event after disabling the CRTC if
+	 * someone was waiting it.
+	 */
+	lsdc_crtc_send_vblank(crtc);
+}
+
+static void lsdc_crtc_atomic_flush(struct drm_crtc *crtc,
+				   struct drm_atomic_commit *state)
+{
+	spin_lock_irq(&crtc->dev->event_lock);
+	if (crtc->state->event) {
+		if (drm_crtc_vblank_get(crtc) == 0)
+			drm_crtc_arm_vblank_event(crtc, crtc->state->event);
+		else
+			drm_crtc_send_vblank_event(crtc, crtc->state->event);
+		crtc->state->event = NULL;
+	}
+	spin_unlock_irq(&crtc->dev->event_lock);
+}
+
+static bool lsdc_crtc_get_scanout_position(struct drm_crtc *crtc,
+					   bool in_vblank_irq,
+					   int *vpos,
+					   int *hpos,
+					   ktime_t *stime,
+					   ktime_t *etime,
+					   const struct drm_display_mode *mode)
+{
+	struct lsdc_crtc *lcrtc = to_lsdc_crtc(crtc);
+	const struct lsdc_crtc_hw_ops *ops = lcrtc->hw_ops;
+	int vsw, vbp, vactive_start, vactive_end, vfp_end;
+	int x, y;
+
+	vsw = mode->crtc_vsync_end - mode->crtc_vsync_start;
+	vbp = mode->crtc_vtotal - mode->crtc_vsync_end;
+
+	vactive_start = vsw + vbp + 1;
+	vactive_end = vactive_start + mode->crtc_vdisplay;
+
+	/* last scan line before VSYNC */
+	vfp_end = mode->crtc_vtotal;
+
+	if (stime)
+		*stime = ktime_get();
+
+	ops->get_scan_pos(lcrtc, &x, &y);
+
+	if (y > vactive_end)
+		y = y - vfp_end - vactive_start;
+	else
+		y -= vactive_start;
+
+	*vpos = y;
+	*hpos = 0;
+
+	if (etime)
+		*etime = ktime_get();
+
+	return true;
+}
+
+static const struct drm_crtc_helper_funcs lsdc_crtc_helper_funcs = {
+	.mode_valid = lsdc_crtc_mode_valid,
+	.mode_set_nofb = lsdc_crtc_mode_set_nofb,
+	.atomic_enable = lsdc_crtc_atomic_enable,
+	.atomic_disable = lsdc_crtc_atomic_disable,
+	.atomic_check = lsdc_crtc_helper_atomic_check,
+	.atomic_flush = lsdc_crtc_atomic_flush,
+	.get_scanout_position = lsdc_crtc_get_scanout_position,
+};
+
+int ls7a1000_crtc_init(struct drm_device *ddev,
+		       struct drm_crtc *crtc,
+		       struct drm_plane *primary,
+		       struct drm_plane *cursor,
+		       unsigned int index,
+		       bool has_vblank)
+{
+	struct lsdc_crtc *lcrtc = to_lsdc_crtc(crtc);
+	int ret;
+
+	ret = lsdc_pixpll_init(&lcrtc->pixpll, ddev, index);
+	if (ret) {
+		drm_err(ddev, "pixel pll init failed: %d\n", ret);
+		return ret;
+	}
+
+	lcrtc->ldev = to_lsdc(ddev);
+	lcrtc->has_vblank = has_vblank;
+	lcrtc->hw_ops = &ls7a1000_crtc_hw_ops[index];
+
+	ret = drm_crtc_init_with_planes(ddev, crtc, primary, cursor,
+					&ls7a1000_crtc_funcs,
+					"LS-CRTC-%d", index);
+	if (ret) {
+		drm_err(ddev, "crtc init with planes failed: %d\n", ret);
+		return ret;
+	}
+
+	drm_crtc_helper_add(crtc, &lsdc_crtc_helper_funcs);
+
+	ret = drm_mode_crtc_set_gamma_size(crtc, 256);
+	if (ret)
+		return ret;
+
+	drm_crtc_enable_color_mgmt(crtc, 0, false, 256);
+
+	return 0;
+}
+
+int ls7a2000_crtc_init(struct drm_device *ddev,
+		       struct drm_crtc *crtc,
+		       struct drm_plane *primary,
+		       struct drm_plane *cursor,
+		       unsigned int index,
+		       bool has_vblank)
+{
+	struct lsdc_crtc *lcrtc = to_lsdc_crtc(crtc);
+	int ret;
+
+	ret = lsdc_pixpll_init(&lcrtc->pixpll, ddev, index);
+	if (ret) {
+		drm_err(ddev, "crtc init with pll failed: %d\n", ret);
+		return ret;
+	}
+
+	lcrtc->ldev = to_lsdc(ddev);
+	lcrtc->has_vblank = has_vblank;
+	lcrtc->hw_ops = &ls7a2000_crtc_hw_ops[index];
+
+	ret = drm_crtc_init_with_planes(ddev, crtc, primary, cursor,
+					&ls7a2000_crtc_funcs,
+					"LS-CRTC-%u", index);
+	if (ret) {
+		drm_err(ddev, "crtc init with planes failed: %d\n", ret);
+		return ret;
+	}
+
+	drm_crtc_helper_add(crtc, &lsdc_crtc_helper_funcs);
+
+	ret = drm_mode_crtc_set_gamma_size(crtc, 256);
+	if (ret)
+		return ret;
+
+	drm_crtc_enable_color_mgmt(crtc, 0, false, 256);
+
+	return 0;
+}
diff --git a/drivers/gpu/drm/loongson/lsdc_debugfs.c b/drivers/gpu/drm/loongson/lsdc_debugfs.c
new file mode 100644
index 000000000..19aa7ef57
--- /dev/null
+++ b/drivers/gpu/drm/loongson/lsdc_debugfs.c
@@ -0,0 +1,111 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2023 Loongson Technology Corporation Limited
+ */
+
+#include <drm/drm_debugfs.h>
+#include <drm/drm_print.h>
+
+#include "lsdc_benchmark.h"
+#include "lsdc_drv.h"
+#include "lsdc_gem.h"
+#include "lsdc_probe.h"
+#include "lsdc_ttm.h"
+
+/* device level debugfs */
+
+static int lsdc_identify(struct seq_file *m, void *arg)
+{
+	struct drm_info_node *node = (struct drm_info_node *)m->private;
+	struct lsdc_device *ldev = (struct lsdc_device *)node->info_ent->data;
+	const struct loongson_gfx_desc *gfx = to_loongson_gfx(ldev->descp);
+	u8 impl, rev;
+
+	loongson_cpu_get_prid(&impl, &rev);
+
+	seq_printf(m, "Running on cpu 0x%x, cpu revision: 0x%x\n",
+		   impl, rev);
+
+	seq_printf(m, "Contained in: %s\n", gfx->model);
+
+	return 0;
+}
+
+static int lsdc_show_mm(struct seq_file *m, void *arg)
+{
+	struct drm_info_node *node = (struct drm_info_node *)m->private;
+	struct drm_device *ddev = node->minor->dev;
+	struct drm_printer p = drm_seq_file_printer(m);
+
+	drm_mm_print(&ddev->vma_offset_manager->vm_addr_space_mm, &p);
+
+	return 0;
+}
+
+static int lsdc_show_gfxpll_clock(struct seq_file *m, void *arg)
+{
+	struct drm_info_node *node = (struct drm_info_node *)m->private;
+	struct lsdc_device *ldev = (struct lsdc_device *)node->info_ent->data;
+	struct drm_printer printer = drm_seq_file_printer(m);
+	struct loongson_gfxpll *gfxpll = ldev->gfxpll;
+
+	gfxpll->funcs->print(gfxpll, &printer, true);
+
+	return 0;
+}
+
+static int lsdc_show_benchmark(struct seq_file *m, void *arg)
+{
+	struct drm_info_node *node = (struct drm_info_node *)m->private;
+	struct lsdc_device *ldev = (struct lsdc_device *)node->info_ent->data;
+	struct drm_printer printer = drm_seq_file_printer(m);
+
+	lsdc_show_benchmark_copy(ldev, &printer);
+
+	return 0;
+}
+
+static int lsdc_pdev_enable_io_mem(struct seq_file *m, void *arg)
+{
+	struct drm_info_node *node = (struct drm_info_node *)m->private;
+	struct lsdc_device *ldev = (struct lsdc_device *)node->info_ent->data;
+	u16 cmd;
+
+	pci_read_config_word(ldev->dc, PCI_COMMAND, &cmd);
+
+	seq_printf(m, "PCI_COMMAND: 0x%x\n", cmd);
+
+	cmd |= PCI_COMMAND_MEMORY | PCI_COMMAND_IO;
+
+	pci_write_config_word(ldev->dc, PCI_COMMAND, cmd);
+
+	pci_read_config_word(ldev->dc, PCI_COMMAND, &cmd);
+
+	seq_printf(m, "PCI_COMMAND: 0x%x\n", cmd);
+
+	return 0;
+}
+
+static struct drm_info_list lsdc_debugfs_list[] = {
+	{ "benchmark",   lsdc_show_benchmark, 0, NULL },
+	{ "bos",         lsdc_show_buffer_object, 0, NULL },
+	{ "chips",       lsdc_identify, 0, NULL },
+	{ "clocks",      lsdc_show_gfxpll_clock, 0, NULL },
+	{ "dc_enable",   lsdc_pdev_enable_io_mem, 0, NULL },
+	{ "mm",          lsdc_show_mm, 0, NULL },
+};
+
+void lsdc_debugfs_init(struct drm_minor *minor)
+{
+	struct drm_device *ddev = minor->dev;
+	struct lsdc_device *ldev = to_lsdc(ddev);
+	unsigned int n = ARRAY_SIZE(lsdc_debugfs_list);
+	unsigned int i;
+
+	for (i = 0; i < n; ++i)
+		lsdc_debugfs_list[i].data = ldev;
+
+	drm_debugfs_create_files(lsdc_debugfs_list, n, minor->debugfs_root, minor);
+
+	lsdc_ttm_debugfs_init(ldev);
+}
diff --git a/drivers/gpu/drm/loongson/lsdc_drv.c b/drivers/gpu/drm/loongson/lsdc_drv.c
new file mode 100644
index 000000000..34405073c
--- /dev/null
+++ b/drivers/gpu/drm/loongson/lsdc_drv.c
@@ -0,0 +1,464 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2023 Loongson Technology Corporation Limited
+ */
+
+#include <linux/aperture.h>
+#include <linux/pci.h>
+#include <linux/vgaarb.h>
+
+#include <drm/clients/drm_client_setup.h>
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fbdev_ttm.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_gem_ttm_helper.h>
+#include <drm/drm_ioctl.h>
+#include <drm/drm_modeset_helper.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_vblank.h>
+
+#include "loongson_module.h"
+#include "lsdc_drv.h"
+#include "lsdc_gem.h"
+#include "lsdc_ttm.h"
+
+#define DRIVER_AUTHOR               "Sui Jingfeng <suijingfeng@loongson.cn>"
+#define DRIVER_NAME                 "loongson"
+#define DRIVER_DESC                 "drm driver for loongson graphics"
+#define DRIVER_MAJOR                1
+#define DRIVER_MINOR                0
+#define DRIVER_PATCHLEVEL           0
+
+DEFINE_DRM_GEM_FOPS(lsdc_gem_fops);
+
+static const struct drm_driver lsdc_drm_driver = {
+	.driver_features = DRIVER_MODESET | DRIVER_RENDER | DRIVER_GEM | DRIVER_ATOMIC,
+	.fops = &lsdc_gem_fops,
+
+	.name = DRIVER_NAME,
+	.desc = DRIVER_DESC,
+	.major = DRIVER_MAJOR,
+	.minor = DRIVER_MINOR,
+	.patchlevel = DRIVER_PATCHLEVEL,
+
+	.debugfs_init = lsdc_debugfs_init,
+	.dumb_create = lsdc_dumb_create,
+	.dumb_map_offset = drm_gem_ttm_dumb_map_offset,
+	.gem_prime_import_sg_table = lsdc_prime_import_sg_table,
+	DRM_FBDEV_TTM_DRIVER_OPS,
+};
+
+static const struct drm_mode_config_funcs lsdc_mode_config_funcs = {
+	.fb_create = drm_gem_fb_create,
+	.atomic_check = drm_atomic_helper_check,
+	.atomic_commit = drm_atomic_helper_commit,
+};
+
+/* Display related */
+
+static int lsdc_modeset_init(struct lsdc_device *ldev,
+			     unsigned int num_crtc,
+			     const struct lsdc_kms_funcs *funcs,
+			     bool has_vblank)
+{
+	struct drm_device *ddev = &ldev->base;
+	struct lsdc_display_pipe *dispipe;
+	unsigned int i;
+	int ret;
+
+	for (i = 0; i < num_crtc; i++) {
+		dispipe = &ldev->dispipe[i];
+
+		/* We need an index before crtc is initialized */
+		dispipe->index = i;
+
+		ret = funcs->create_i2c(ddev, dispipe, i);
+		if (ret)
+			return ret;
+	}
+
+	for (i = 0; i < num_crtc; i++) {
+		struct i2c_adapter *ddc = NULL;
+
+		dispipe = &ldev->dispipe[i];
+		if (dispipe->li2c)
+			ddc = &dispipe->li2c->adapter;
+
+		ret = funcs->output_init(ddev, dispipe, ddc, i);
+		if (ret)
+			return ret;
+
+		ldev->num_output++;
+	}
+
+	for (i = 0; i < num_crtc; i++) {
+		dispipe = &ldev->dispipe[i];
+
+		ret = funcs->primary_plane_init(ddev, &dispipe->primary.base, i);
+		if (ret)
+			return ret;
+
+		ret = funcs->cursor_plane_init(ddev, &dispipe->cursor.base, i);
+		if (ret)
+			return ret;
+
+		ret = funcs->crtc_init(ddev, &dispipe->crtc.base,
+				       &dispipe->primary.base,
+				       &dispipe->cursor.base,
+				       i, has_vblank);
+		if (ret)
+			return ret;
+	}
+
+	drm_info(ddev, "Total %u outputs\n", ldev->num_output);
+
+	return 0;
+}
+
+static const struct drm_mode_config_helper_funcs lsdc_mode_config_helper_funcs = {
+	.atomic_commit_tail = drm_atomic_helper_commit_tail,
+};
+
+static int lsdc_mode_config_init(struct drm_device *ddev,
+				 const struct lsdc_desc *descp)
+{
+	int ret;
+
+	ret = drmm_mode_config_init(ddev);
+	if (ret)
+		return ret;
+
+	ddev->mode_config.funcs = &lsdc_mode_config_funcs;
+	ddev->mode_config.min_width = 1;
+	ddev->mode_config.min_height = 1;
+	ddev->mode_config.max_width = descp->max_width * LSDC_NUM_CRTC;
+	ddev->mode_config.max_height = descp->max_height * LSDC_NUM_CRTC;
+	ddev->mode_config.preferred_depth = 24;
+	ddev->mode_config.prefer_shadow = 1;
+
+	ddev->mode_config.cursor_width = descp->hw_cursor_h;
+	ddev->mode_config.cursor_height = descp->hw_cursor_h;
+
+	ddev->mode_config.helper_private = &lsdc_mode_config_helper_funcs;
+
+	if (descp->has_vblank_counter)
+		ddev->max_vblank_count = 0xffffffff;
+
+	return ret;
+}
+
+/*
+ * The GPU and display controller in the LS7A1000/LS7A2000/LS2K2000 are
+ * separated PCIE devices. They are two devices, not one. Bar 2 of the GPU
+ * device contains the base address and size of the VRAM, both the GPU and
+ * the DC could access the on-board VRAM.
+ */
+static int lsdc_get_dedicated_vram(struct lsdc_device *ldev,
+				   struct pci_dev *pdev_dc,
+				   const struct lsdc_desc *descp)
+{
+	struct drm_device *ddev = &ldev->base;
+	struct pci_dev *pdev_gpu;
+	resource_size_t base, size;
+
+	/*
+	 * The GPU has 00:06.0 as its BDF, while the DC has 00:06.1
+	 * This is true for the LS7A1000, LS7A2000 and LS2K2000.
+	 */
+	pdev_gpu = pci_get_domain_bus_and_slot(pci_domain_nr(pdev_dc->bus),
+					       pdev_dc->bus->number,
+					       PCI_DEVFN(6, 0));
+	if (!pdev_gpu) {
+		drm_err(ddev, "No GPU device, then no VRAM\n");
+		return -ENODEV;
+	}
+
+	base = pci_resource_start(pdev_gpu, 2);
+	size = pci_resource_len(pdev_gpu, 2);
+
+	ldev->vram_base = base;
+	ldev->vram_size = size;
+	ldev->gpu = pdev_gpu;
+
+	drm_info(ddev, "Dedicated vram start: 0x%llx, size: %uMiB\n",
+		 (u64)base, (u32)(size >> 20));
+
+	return (size > SZ_1M) ? 0 : -ENODEV;
+}
+
+static struct lsdc_device *
+lsdc_create_device(struct pci_dev *pdev,
+		   const struct lsdc_desc *descp,
+		   const struct drm_driver *driver)
+{
+	struct lsdc_device *ldev;
+	struct drm_device *ddev;
+	int ret;
+
+	ldev = devm_drm_dev_alloc(&pdev->dev, driver, struct lsdc_device, base);
+	if (IS_ERR(ldev))
+		return ldev;
+
+	ldev->dc = pdev;
+	ldev->descp = descp;
+
+	ddev = &ldev->base;
+
+	loongson_gfxpll_create(ddev, &ldev->gfxpll);
+
+	ret = lsdc_get_dedicated_vram(ldev, pdev, descp);
+	if (ret) {
+		drm_err(ddev, "Init VRAM failed: %d\n", ret);
+		return ERR_PTR(ret);
+	}
+
+	ret = aperture_remove_conflicting_devices(ldev->vram_base,
+						  ldev->vram_size,
+						  driver->name);
+	if (ret) {
+		drm_err(ddev, "Remove firmware framebuffers failed: %d\n", ret);
+		return ERR_PTR(ret);
+	}
+
+	ret = lsdc_ttm_init(ldev);
+	if (ret) {
+		drm_err(ddev, "Memory manager init failed: %d\n", ret);
+		return ERR_PTR(ret);
+	}
+
+	lsdc_gem_init(ddev);
+
+	/* Bar 0 of the DC device contains the MMIO register's base address */
+	ldev->reg_base = pcim_iomap_region(pdev, 0, "lsdc");
+	if (IS_ERR(ldev->reg_base))
+		return ldev->reg_base;
+
+	spin_lock_init(&ldev->reglock);
+
+	ret = lsdc_mode_config_init(ddev, descp);
+	if (ret)
+		return ERR_PTR(ret);
+
+	ret = lsdc_modeset_init(ldev, descp->num_of_crtc, descp->funcs,
+				loongson_vblank);
+	if (ret)
+		return ERR_PTR(ret);
+
+	drm_mode_config_reset(ddev);
+
+	return ldev;
+}
+
+/* For multiple GPU driver instance co-exixt in the system */
+
+static unsigned int lsdc_vga_set_decode(struct pci_dev *pdev, bool state)
+{
+	return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
+}
+
+static int lsdc_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+	const struct lsdc_desc *descp;
+	struct drm_device *ddev;
+	struct lsdc_device *ldev;
+	int ret;
+
+	descp = lsdc_device_probe(pdev, ent->driver_data);
+	if (IS_ERR_OR_NULL(descp))
+		return -ENODEV;
+
+	pci_set_master(pdev);
+
+	ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(40));
+	if (ret)
+		return ret;
+
+	ret = pcim_enable_device(pdev);
+	if (ret)
+		return ret;
+
+	dev_info(&pdev->dev, "Found %s, revision: %u",
+		 to_loongson_gfx(descp)->model, pdev->revision);
+
+	ldev = lsdc_create_device(pdev, descp, &lsdc_drm_driver);
+	if (IS_ERR(ldev))
+		return PTR_ERR(ldev);
+
+	ddev = &ldev->base;
+
+	pci_set_drvdata(pdev, ddev);
+
+	vga_client_register(pdev, lsdc_vga_set_decode);
+
+	drmm_kms_helper_poll_init(ddev);
+
+	if (loongson_vblank) {
+		ret = drm_vblank_init(ddev, descp->num_of_crtc);
+		if (ret)
+			return ret;
+
+		ret = devm_request_irq(&pdev->dev, pdev->irq,
+				       descp->funcs->irq_handler,
+				       IRQF_SHARED,
+				       dev_name(&pdev->dev), ddev);
+		if (ret) {
+			drm_err(ddev, "Failed to register interrupt: %d\n", ret);
+			return ret;
+		}
+
+		drm_info(ddev, "registered irq: %u\n", pdev->irq);
+	}
+
+	ret = drm_dev_register(ddev, 0);
+	if (ret)
+		return ret;
+
+	drm_client_setup(ddev, NULL);
+
+	return 0;
+}
+
+static void lsdc_pci_remove(struct pci_dev *pdev)
+{
+	struct drm_device *ddev = pci_get_drvdata(pdev);
+
+	drm_dev_unregister(ddev);
+	drm_atomic_helper_shutdown(ddev);
+}
+
+static void lsdc_pci_shutdown(struct pci_dev *pdev)
+{
+	drm_atomic_helper_shutdown(pci_get_drvdata(pdev));
+}
+
+static int lsdc_drm_freeze(struct drm_device *ddev)
+{
+	struct lsdc_device *ldev = to_lsdc(ddev);
+	struct lsdc_bo *lbo;
+	int ret;
+
+	/* unpin all of buffers in the VRAM */
+	mutex_lock(&ldev->gem.mutex);
+	list_for_each_entry(lbo, &ldev->gem.objects, list) {
+		struct ttm_buffer_object *tbo = &lbo->tbo;
+		struct ttm_resource *resource = tbo->resource;
+		unsigned int pin_count = tbo->pin_count;
+
+		drm_dbg(ddev, "bo[%p], size: %zuKiB, type: %s, pin count: %u\n",
+			lbo, lsdc_bo_size(lbo) >> 10,
+			lsdc_mem_type_to_str(resource->mem_type), pin_count);
+
+		if (!pin_count)
+			continue;
+
+		if (resource->mem_type == TTM_PL_VRAM) {
+			ret = lsdc_bo_reserve(lbo);
+			if (unlikely(ret)) {
+				drm_err(ddev, "bo reserve failed: %d\n", ret);
+				continue;
+			}
+
+			do {
+				lsdc_bo_unpin(lbo);
+				--pin_count;
+			} while (pin_count);
+
+			lsdc_bo_unreserve(lbo);
+		}
+	}
+	mutex_unlock(&ldev->gem.mutex);
+
+	lsdc_bo_evict_vram(ddev);
+
+	ret = drm_mode_config_helper_suspend(ddev);
+	if (unlikely(ret)) {
+		drm_err(ddev, "Freeze error: %d", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int lsdc_drm_resume(struct device *dev)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct drm_device *ddev = pci_get_drvdata(pdev);
+
+	return drm_mode_config_helper_resume(ddev);
+}
+
+static int lsdc_pm_freeze(struct device *dev)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct drm_device *ddev = pci_get_drvdata(pdev);
+
+	return lsdc_drm_freeze(ddev);
+}
+
+static int lsdc_pm_thaw(struct device *dev)
+{
+	return lsdc_drm_resume(dev);
+}
+
+static int lsdc_pm_suspend(struct device *dev)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	int error;
+
+	error = lsdc_pm_freeze(dev);
+	if (error)
+		return error;
+
+	pci_save_state(pdev);
+	/* Shut down the device */
+	pci_disable_device(pdev);
+	pci_set_power_state(pdev, PCI_D3hot);
+
+	return 0;
+}
+
+static int lsdc_pm_resume(struct device *dev)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+
+	pci_set_power_state(pdev, PCI_D0);
+
+	pci_restore_state(pdev);
+
+	if (pcim_enable_device(pdev))
+		return -EIO;
+
+	return lsdc_pm_thaw(dev);
+}
+
+static const struct dev_pm_ops lsdc_pm_ops = {
+	.suspend = lsdc_pm_suspend,
+	.resume = lsdc_pm_resume,
+	.freeze = lsdc_pm_freeze,
+	.thaw = lsdc_pm_thaw,
+	.poweroff = lsdc_pm_freeze,
+	.restore = lsdc_pm_resume,
+};
+
+static const struct pci_device_id lsdc_pciid_list[] = {
+	{PCI_VDEVICE(LOONGSON, 0x7a06), CHIP_LS7A1000},
+	{PCI_VDEVICE(LOONGSON, 0x7a36), CHIP_LS7A2000},
+	{ }
+};
+
+struct pci_driver lsdc_pci_driver = {
+	.name = DRIVER_NAME,
+	.id_table = lsdc_pciid_list,
+	.probe = lsdc_pci_probe,
+	.remove = lsdc_pci_remove,
+	.shutdown = lsdc_pci_shutdown,
+	.driver.pm = &lsdc_pm_ops,
+};
+
+MODULE_DEVICE_TABLE(pci, lsdc_pciid_list);
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/loongson/lsdc_drv.h b/drivers/gpu/drm/loongson/lsdc_drv.h
new file mode 100644
index 000000000..fbf2d760e
--- /dev/null
+++ b/drivers/gpu/drm/loongson/lsdc_drv.h
@@ -0,0 +1,388 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2023 Loongson Technology Corporation Limited
+ */
+
+#ifndef __LSDC_DRV_H__
+#define __LSDC_DRV_H__
+
+#include <linux/pci.h>
+
+#include <drm/drm_connector.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_device.h>
+#include <drm/drm_encoder.h>
+#include <drm/drm_file.h>
+#include <drm/drm_plane.h>
+#include <drm/ttm/ttm_device.h>
+
+#include "lsdc_i2c.h"
+#include "lsdc_irq.h"
+#include "lsdc_gfxpll.h"
+#include "lsdc_output.h"
+#include "lsdc_pixpll.h"
+#include "lsdc_regs.h"
+
+/* Currently, all Loongson display controllers have two display pipes. */
+#define LSDC_NUM_CRTC           2
+
+/*
+ * LS7A1000/LS7A2000 chipsets function as the south & north bridges of the
+ * Loongson 3 series processors, they are equipped with on-board video RAM
+ * typically. While Loongson LS2K series are low cost SoCs which share the
+ * system RAM as video RAM, they don't has a dedicated VRAM.
+ *
+ * There is only a 1:1 mapping of crtcs, encoders and connectors for the DC
+ *
+ * display pipe 0 = crtc0 + dvo0 + encoder0 + connector0 + cursor0 + primary0
+ * display pipe 1 = crtc1 + dvo1 + encoder1 + connectro1 + cursor1 + primary1
+ */
+
+enum loongson_chip_id {
+	CHIP_LS7A1000 = 0,
+	CHIP_LS7A2000 = 1,
+	CHIP_LS_LAST,
+};
+
+const struct lsdc_desc *
+lsdc_device_probe(struct pci_dev *pdev, enum loongson_chip_id chip);
+
+struct lsdc_kms_funcs;
+
+/* DC specific */
+
+struct lsdc_desc {
+	u32 num_of_crtc;
+	u32 max_pixel_clk;
+	u32 max_width;
+	u32 max_height;
+	u32 num_of_hw_cursor;
+	u32 hw_cursor_w;
+	u32 hw_cursor_h;
+	u32 pitch_align;         /* CRTC DMA alignment constraint */
+	bool has_vblank_counter; /* 32 bit hw vsync counter */
+
+	/* device dependent ops, dc side */
+	const struct lsdc_kms_funcs *funcs;
+};
+
+/* GFX related resources wrangler */
+
+struct loongson_gfx_desc {
+	struct lsdc_desc dc;
+
+	u32 conf_reg_base;
+
+	/* GFXPLL shared by the DC, GMC and GPU */
+	struct {
+		u32 reg_offset;
+		u32 reg_size;
+	} gfxpll;
+
+	/* Pixel PLL, per display pipe */
+	struct {
+		u32 reg_offset;
+		u32 reg_size;
+	} pixpll[LSDC_NUM_CRTC];
+
+	enum loongson_chip_id chip_id;
+	char model[64];
+};
+
+static inline const struct loongson_gfx_desc *
+to_loongson_gfx(const struct lsdc_desc *dcp)
+{
+	return container_of_const(dcp, struct loongson_gfx_desc, dc);
+};
+
+struct lsdc_reg32 {
+	char *name;
+	u32 offset;
+};
+
+/* crtc hardware related ops */
+
+struct lsdc_crtc;
+
+struct lsdc_crtc_hw_ops {
+	void (*enable)(struct lsdc_crtc *lcrtc);
+	void (*disable)(struct lsdc_crtc *lcrtc);
+	void (*enable_vblank)(struct lsdc_crtc *lcrtc);
+	void (*disable_vblank)(struct lsdc_crtc *lcrtc);
+	void (*flip)(struct lsdc_crtc *lcrtc);
+	void (*clone)(struct lsdc_crtc *lcrtc);
+	void (*get_scan_pos)(struct lsdc_crtc *lcrtc, int *hpos, int *vpos);
+	void (*set_mode)(struct lsdc_crtc *lcrtc, const struct drm_display_mode *mode);
+	void (*soft_reset)(struct lsdc_crtc *lcrtc);
+	void (*reset)(struct lsdc_crtc *lcrtc);
+
+	u32  (*get_vblank_counter)(struct lsdc_crtc *lcrtc);
+	void (*set_dma_step)(struct lsdc_crtc *lcrtc, enum lsdc_dma_steps step);
+};
+
+struct lsdc_crtc {
+	struct drm_crtc base;
+	struct lsdc_pixpll pixpll;
+	struct lsdc_device *ldev;
+	const struct lsdc_crtc_hw_ops *hw_ops;
+	const struct lsdc_reg32 *preg;
+	unsigned int nreg;
+	struct drm_info_list *p_info_list;
+	unsigned int n_info_list;
+	bool has_vblank;
+};
+
+/* primary plane hardware related ops */
+
+struct lsdc_primary;
+
+struct lsdc_primary_plane_ops {
+	void (*update_fb_addr)(struct lsdc_primary *plane, u64 addr);
+	void (*update_fb_stride)(struct lsdc_primary *plane, u32 stride);
+	void (*update_fb_format)(struct lsdc_primary *plane,
+				 const struct drm_format_info *format);
+};
+
+struct lsdc_primary {
+	struct drm_plane base;
+	const struct lsdc_primary_plane_ops *ops;
+	struct lsdc_device *ldev;
+};
+
+/* cursor plane hardware related ops */
+
+struct lsdc_cursor;
+
+struct lsdc_cursor_plane_ops {
+	void (*update_bo_addr)(struct lsdc_cursor *plane, u64 addr);
+	void (*update_cfg)(struct lsdc_cursor *plane,
+			   enum lsdc_cursor_size cursor_size,
+			   enum lsdc_cursor_format);
+	void (*update_position)(struct lsdc_cursor *plane, int x, int y);
+};
+
+struct lsdc_cursor {
+	struct drm_plane base;
+	const struct lsdc_cursor_plane_ops *ops;
+	struct lsdc_device *ldev;
+};
+
+struct lsdc_output {
+	struct drm_encoder encoder;
+	struct drm_connector connector;
+};
+
+static inline struct lsdc_output *
+connector_to_lsdc_output(struct drm_connector *connector)
+{
+	return container_of(connector, struct lsdc_output, connector);
+}
+
+static inline struct lsdc_output *
+encoder_to_lsdc_output(struct drm_encoder *encoder)
+{
+	return container_of(encoder, struct lsdc_output, encoder);
+}
+
+struct lsdc_display_pipe {
+	struct lsdc_crtc crtc;
+	struct lsdc_primary primary;
+	struct lsdc_cursor cursor;
+	struct lsdc_output output;
+	struct lsdc_i2c *li2c;
+	unsigned int index;
+};
+
+static inline struct lsdc_display_pipe *
+output_to_display_pipe(struct lsdc_output *output)
+{
+	return container_of(output, struct lsdc_display_pipe, output);
+}
+
+struct lsdc_kms_funcs {
+	irqreturn_t (*irq_handler)(int irq, void *arg);
+
+	int (*create_i2c)(struct drm_device *ddev,
+			  struct lsdc_display_pipe *dispipe,
+			  unsigned int index);
+
+	int (*output_init)(struct drm_device *ddev,
+			   struct lsdc_display_pipe *dispipe,
+			   struct i2c_adapter *ddc,
+			   unsigned int index);
+
+	int (*cursor_plane_init)(struct drm_device *ddev,
+				 struct drm_plane *plane,
+				 unsigned int index);
+
+	int (*primary_plane_init)(struct drm_device *ddev,
+				  struct drm_plane *plane,
+				  unsigned int index);
+
+	int (*crtc_init)(struct drm_device *ddev,
+			 struct drm_crtc *crtc,
+			 struct drm_plane *primary,
+			 struct drm_plane *cursor,
+			 unsigned int index,
+			 bool has_vblank);
+};
+
+static inline struct lsdc_crtc *
+to_lsdc_crtc(struct drm_crtc *crtc)
+{
+	return container_of(crtc, struct lsdc_crtc, base);
+}
+
+static inline struct lsdc_display_pipe *
+crtc_to_display_pipe(struct drm_crtc *crtc)
+{
+	return container_of(crtc, struct lsdc_display_pipe, crtc.base);
+}
+
+static inline struct lsdc_primary *
+to_lsdc_primary(struct drm_plane *plane)
+{
+	return container_of(plane, struct lsdc_primary, base);
+}
+
+static inline struct lsdc_cursor *
+to_lsdc_cursor(struct drm_plane *plane)
+{
+	return container_of(plane, struct lsdc_cursor, base);
+}
+
+struct lsdc_crtc_state {
+	struct drm_crtc_state base;
+	struct lsdc_pixpll_parms pparms;
+};
+
+struct lsdc_gem {
+	/* @mutex: protect objects list */
+	struct mutex mutex;
+	struct list_head objects;
+};
+
+struct lsdc_device {
+	struct drm_device base;
+	struct ttm_device bdev;
+
+	/* @descp: features description of the DC variant */
+	const struct lsdc_desc *descp;
+	struct pci_dev *dc;
+	struct pci_dev *gpu;
+
+	struct loongson_gfxpll *gfxpll;
+
+	/* @reglock: protects concurrent access */
+	spinlock_t reglock;
+
+	void __iomem *reg_base;
+	resource_size_t vram_base;
+	resource_size_t vram_size;
+
+	resource_size_t gtt_base;
+	resource_size_t gtt_size;
+
+	struct lsdc_display_pipe dispipe[LSDC_NUM_CRTC];
+
+	struct lsdc_gem gem;
+
+	u32 irq_status;
+
+	/* tracking pinned memory */
+	size_t vram_pinned_size;
+	size_t gtt_pinned_size;
+
+	/* @num_output: count the number of active display pipe */
+	unsigned int num_output;
+};
+
+static inline struct lsdc_device *tdev_to_ldev(struct ttm_device *bdev)
+{
+	return container_of(bdev, struct lsdc_device, bdev);
+}
+
+static inline struct lsdc_device *to_lsdc(struct drm_device *ddev)
+{
+	return container_of(ddev, struct lsdc_device, base);
+}
+
+static inline struct lsdc_crtc_state *
+to_lsdc_crtc_state(struct drm_crtc_state *base)
+{
+	return container_of(base, struct lsdc_crtc_state, base);
+}
+
+void lsdc_debugfs_init(struct drm_minor *minor);
+
+int ls7a1000_crtc_init(struct drm_device *ddev,
+		       struct drm_crtc *crtc,
+		       struct drm_plane *primary,
+		       struct drm_plane *cursor,
+		       unsigned int index,
+		       bool no_vblank);
+
+int ls7a2000_crtc_init(struct drm_device *ddev,
+		       struct drm_crtc *crtc,
+		       struct drm_plane *primary,
+		       struct drm_plane *cursor,
+		       unsigned int index,
+		       bool no_vblank);
+
+int lsdc_primary_plane_init(struct drm_device *ddev,
+			    struct drm_plane *plane,
+			    unsigned int index);
+
+int ls7a1000_cursor_plane_init(struct drm_device *ddev,
+			       struct drm_plane *plane,
+			       unsigned int index);
+
+int ls7a2000_cursor_plane_init(struct drm_device *ddev,
+			       struct drm_plane *plane,
+			       unsigned int index);
+
+/* Registers access helpers */
+
+static inline u32 lsdc_rreg32(struct lsdc_device *ldev, u32 offset)
+{
+	return readl(ldev->reg_base + offset);
+}
+
+static inline void lsdc_wreg32(struct lsdc_device *ldev, u32 offset, u32 val)
+{
+	writel(val, ldev->reg_base + offset);
+}
+
+static inline void lsdc_ureg32_set(struct lsdc_device *ldev,
+				   u32 offset,
+				   u32 mask)
+{
+	void __iomem *addr = ldev->reg_base + offset;
+	u32 val = readl(addr);
+
+	writel(val | mask, addr);
+}
+
+static inline void lsdc_ureg32_clr(struct lsdc_device *ldev,
+				   u32 offset,
+				   u32 mask)
+{
+	void __iomem *addr = ldev->reg_base + offset;
+	u32 val = readl(addr);
+
+	writel(val & ~mask, addr);
+}
+
+static inline u32 lsdc_pipe_rreg32(struct lsdc_device *ldev,
+				   u32 offset, u32 pipe)
+{
+	return readl(ldev->reg_base + offset + pipe * CRTC_PIPE_OFFSET);
+}
+
+static inline void lsdc_pipe_wreg32(struct lsdc_device *ldev,
+				    u32 offset, u32 pipe, u32 val)
+{
+	writel(val, ldev->reg_base + offset + pipe * CRTC_PIPE_OFFSET);
+}
+
+#endif
diff --git a/drivers/gpu/drm/loongson/lsdc_gem.c b/drivers/gpu/drm/loongson/lsdc_gem.c
new file mode 100644
index 000000000..2fb03487c
--- /dev/null
+++ b/drivers/gpu/drm/loongson/lsdc_gem.c
@@ -0,0 +1,275 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2023 Loongson Technology Corporation Limited
+ */
+
+#include <linux/dma-buf.h>
+
+#include <drm/drm_debugfs.h>
+#include <drm/drm_dumb_buffers.h>
+#include <drm/drm_file.h>
+#include <drm/drm_gem.h>
+#include <drm/drm_prime.h>
+#include <drm/drm_print.h>
+
+#include "lsdc_drv.h"
+#include "lsdc_gem.h"
+#include "lsdc_ttm.h"
+
+static int lsdc_gem_prime_pin(struct drm_gem_object *obj)
+{
+	struct lsdc_bo *lbo = gem_to_lsdc_bo(obj);
+	int ret;
+
+	dma_resv_assert_held(obj->resv);
+
+	ret = lsdc_bo_pin(lbo, LSDC_GEM_DOMAIN_GTT, NULL);
+	if (likely(ret == 0))
+		lbo->sharing_count++;
+
+	return ret;
+}
+
+static void lsdc_gem_prime_unpin(struct drm_gem_object *obj)
+{
+	struct lsdc_bo *lbo = gem_to_lsdc_bo(obj);
+
+	dma_resv_assert_held(obj->resv);
+
+	lsdc_bo_unpin(lbo);
+	if (lbo->sharing_count)
+		lbo->sharing_count--;
+}
+
+static struct sg_table *lsdc_gem_prime_get_sg_table(struct drm_gem_object *obj)
+{
+	struct ttm_buffer_object *tbo = to_ttm_bo(obj);
+	struct ttm_tt *tt = tbo->ttm;
+
+	if (!tt) {
+		drm_err(obj->dev, "sharing a buffer without backing memory\n");
+		return ERR_PTR(-ENOMEM);
+	}
+
+	return drm_prime_pages_to_sg(obj->dev, tt->pages, tt->num_pages);
+}
+
+static void lsdc_gem_object_free(struct drm_gem_object *obj)
+{
+	struct ttm_buffer_object *tbo = to_ttm_bo(obj);
+
+	if (tbo)
+		ttm_bo_fini(tbo);
+}
+
+static int lsdc_gem_object_vmap(struct drm_gem_object *obj, struct iosys_map *map)
+{
+	struct ttm_buffer_object *tbo = to_ttm_bo(obj);
+	struct lsdc_bo *lbo = to_lsdc_bo(tbo);
+	int ret;
+
+	if (lbo->vmap_count > 0) {
+		++lbo->vmap_count;
+		goto out;
+	}
+
+	ret = lsdc_bo_pin(lbo, 0, NULL);
+	if (unlikely(ret)) {
+		drm_err(obj->dev, "pin %p for vmap failed\n", lbo);
+		return ret;
+	}
+
+	ret = ttm_bo_vmap(tbo, &lbo->map);
+	if (ret) {
+		drm_err(obj->dev, "ttm bo vmap failed\n");
+		lsdc_bo_unpin(lbo);
+		return ret;
+	}
+
+	lbo->vmap_count = 1;
+
+out:
+	*map = lbo->map;
+
+	return 0;
+}
+
+static void lsdc_gem_object_vunmap(struct drm_gem_object *obj, struct iosys_map *map)
+{
+	struct ttm_buffer_object *tbo = to_ttm_bo(obj);
+	struct lsdc_bo *lbo = to_lsdc_bo(tbo);
+
+	if (unlikely(!lbo->vmap_count)) {
+		drm_warn(obj->dev, "%p is not mapped\n", lbo);
+		return;
+	}
+
+	--lbo->vmap_count;
+	if (lbo->vmap_count == 0) {
+		ttm_bo_vunmap(tbo, &lbo->map);
+
+		lsdc_bo_unpin(lbo);
+	}
+}
+
+static int lsdc_gem_object_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
+{
+	struct ttm_buffer_object *tbo = to_ttm_bo(obj);
+	int ret;
+
+	ret = ttm_bo_mmap_obj(vma, tbo);
+	if (unlikely(ret)) {
+		drm_warn(obj->dev, "mmap %p failed\n", tbo);
+		return ret;
+	}
+
+	drm_gem_object_put(obj);
+
+	return 0;
+}
+
+static const struct drm_gem_object_funcs lsdc_gem_object_funcs = {
+	.free = lsdc_gem_object_free,
+	.export = drm_gem_prime_export,
+	.pin = lsdc_gem_prime_pin,
+	.unpin = lsdc_gem_prime_unpin,
+	.get_sg_table = lsdc_gem_prime_get_sg_table,
+	.vmap = lsdc_gem_object_vmap,
+	.vunmap = lsdc_gem_object_vunmap,
+	.mmap = lsdc_gem_object_mmap,
+};
+
+struct drm_gem_object *lsdc_gem_object_create(struct drm_device *ddev,
+					      u32 domain,
+					      size_t size,
+					      bool kerenl,
+					      struct sg_table *sg,
+					      struct dma_resv *resv)
+{
+	struct lsdc_device *ldev = to_lsdc(ddev);
+	struct drm_gem_object *gobj;
+	struct lsdc_bo *lbo;
+	int ret;
+
+	lbo = lsdc_bo_create(ddev, domain, size, kerenl, sg, resv);
+	if (IS_ERR(lbo)) {
+		ret = PTR_ERR(lbo);
+		return ERR_PTR(ret);
+	}
+
+	if (!sg) {
+		/* VRAM is filled with random data */
+		lsdc_bo_clear(lbo);
+	}
+
+	gobj = &lbo->tbo.base;
+	gobj->funcs = &lsdc_gem_object_funcs;
+
+	/* tracking the BOs we created */
+	mutex_lock(&ldev->gem.mutex);
+	list_add_tail(&lbo->list, &ldev->gem.objects);
+	mutex_unlock(&ldev->gem.mutex);
+
+	return gobj;
+}
+
+struct drm_gem_object *
+lsdc_prime_import_sg_table(struct drm_device *ddev,
+			   struct dma_buf_attachment *attach,
+			   struct sg_table *sg)
+{
+	struct dma_resv *resv = attach->dmabuf->resv;
+	u64 size = attach->dmabuf->size;
+	struct drm_gem_object *gobj;
+	struct lsdc_bo *lbo;
+
+	dma_resv_lock(resv, NULL);
+	gobj = lsdc_gem_object_create(ddev, LSDC_GEM_DOMAIN_GTT, size, false,
+				      sg, resv);
+	dma_resv_unlock(resv);
+
+	if (IS_ERR(gobj)) {
+		drm_err(ddev, "Failed to import sg table\n");
+		return gobj;
+	}
+
+	lbo = gem_to_lsdc_bo(gobj);
+	lbo->sharing_count = 1;
+
+	return gobj;
+}
+
+int lsdc_dumb_create(struct drm_file *file, struct drm_device *ddev,
+		     struct drm_mode_create_dumb *args)
+{
+	struct lsdc_device *ldev = to_lsdc(ddev);
+	const struct lsdc_desc *descp = ldev->descp;
+	u32 domain = LSDC_GEM_DOMAIN_VRAM;
+	struct drm_gem_object *gobj;
+	int ret;
+
+	ret = drm_mode_size_dumb(ddev, args, descp->pitch_align, 0);
+	if (ret)
+		return ret;
+
+	/* Maximum single bo size allowed is the half vram size available */
+	if (args->size > ldev->vram_size / 2) {
+		drm_err(ddev, "Requesting(%zuMiB) failed\n", (size_t)(args->size >> PAGE_SHIFT));
+		return -ENOMEM;
+	}
+
+	gobj = lsdc_gem_object_create(ddev, domain, args->size, false, NULL, NULL);
+	if (IS_ERR(gobj)) {
+		drm_err(ddev, "Failed to create gem object\n");
+		return PTR_ERR(gobj);
+	}
+
+	ret = drm_gem_handle_create(file, gobj, &args->handle);
+
+	/* drop reference from allocate, handle holds it now */
+	drm_gem_object_put(gobj);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+
+void lsdc_gem_init(struct drm_device *ddev)
+{
+	struct lsdc_device *ldev = to_lsdc(ddev);
+
+	mutex_init(&ldev->gem.mutex);
+	INIT_LIST_HEAD(&ldev->gem.objects);
+}
+
+int lsdc_show_buffer_object(struct seq_file *m, void *arg)
+{
+	struct drm_info_node *node = (struct drm_info_node *)m->private;
+	struct drm_device *ddev = node->minor->dev;
+	struct lsdc_device *ldev = to_lsdc(ddev);
+	struct lsdc_bo *lbo;
+	unsigned int i;
+
+	mutex_lock(&ldev->gem.mutex);
+
+	i = 0;
+
+	list_for_each_entry(lbo, &ldev->gem.objects, list) {
+		struct ttm_buffer_object *tbo = &lbo->tbo;
+		struct ttm_resource *resource = tbo->resource;
+
+		seq_printf(m, "bo[%04u][%p]: size: %8zuKiB %s offset: %8llx\n",
+			   i, lbo, lsdc_bo_size(lbo) >> 10,
+			   lsdc_mem_type_to_str(resource->mem_type),
+			   lsdc_bo_gpu_offset(lbo));
+		i++;
+	}
+
+	mutex_unlock(&ldev->gem.mutex);
+
+	seq_printf(m, "Pinned BO size: VRAM: %zuKiB, GTT: %zu KiB\n",
+		   ldev->vram_pinned_size >> 10, ldev->gtt_pinned_size >> 10);
+
+	return 0;
+}
diff --git a/drivers/gpu/drm/loongson/lsdc_gem.h b/drivers/gpu/drm/loongson/lsdc_gem.h
new file mode 100644
index 000000000..96729b3ee
--- /dev/null
+++ b/drivers/gpu/drm/loongson/lsdc_gem.h
@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2023 Loongson Technology Corporation Limited
+ */
+
+#ifndef __LSDC_GEM_H__
+#define __LSDC_GEM_H__
+
+#include <drm/drm_device.h>
+#include <drm/drm_gem.h>
+
+struct drm_gem_object *
+lsdc_prime_import_sg_table(struct drm_device *ddev,
+			   struct dma_buf_attachment *attach,
+			   struct sg_table *sg);
+
+
+int lsdc_dumb_create(struct drm_file *file,
+		     struct drm_device *ddev,
+		     struct drm_mode_create_dumb *args);
+
+void lsdc_gem_init(struct drm_device *ddev);
+int lsdc_show_buffer_object(struct seq_file *m, void *arg);
+
+struct drm_gem_object *
+lsdc_gem_object_create(struct drm_device *ddev,
+		       u32 domain,
+		       size_t size,
+		       bool kerenl,
+		       struct sg_table *sg,
+		       struct dma_resv *resv);
+
+#endif
diff --git a/drivers/gpu/drm/loongson/lsdc_gfxpll.c b/drivers/gpu/drm/loongson/lsdc_gfxpll.c
new file mode 100644
index 000000000..2daa62e72
--- /dev/null
+++ b/drivers/gpu/drm/loongson/lsdc_gfxpll.c
@@ -0,0 +1,199 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2023 Loongson Technology Corporation Limited
+ */
+
+#include <linux/delay.h>
+
+#include <drm/drm_file.h>
+#include <drm/drm_managed.h>
+#include <drm/drm_print.h>
+
+#include "lsdc_drv.h"
+
+/*
+ * GFX PLL is the PLL used by DC, GMC and GPU, the structure of the GFX PLL
+ * may suffer from change across chip variants.
+ *
+ *
+ *                                            +-------------+  sel_out_dc
+ *                                       +----| / div_out_0 | _____/ _____ DC
+ *                                       |    +-------------+
+ * refclk   +---------+      +-------+   |    +-------------+  sel_out_gmc
+ * ---+---> | div_ref | ---> | loopc | --+--> | / div_out_1 | _____/ _____ GMC
+ *    |     +---------+      +-------+   |    +-------------+
+ *    |          /               *       |    +-------------+  sel_out_gpu
+ *    |                                  +----| / div_out_2 | _____/ _____ GPU
+ *    |                                       +-------------+
+ *    |                                                         ^
+ *    |                                                         |
+ *    +--------------------------- bypass ----------------------+
+ */
+
+struct loongson_gfxpll_bitmap {
+	/* Byte 0 ~ Byte 3 */
+	unsigned div_out_dc    : 7;  /*  6 : 0    DC output clock divider  */
+	unsigned div_out_gmc   : 7;  /* 13 : 7    GMC output clock divider */
+	unsigned div_out_gpu   : 7;  /* 20 : 14   GPU output clock divider */
+	unsigned loopc         : 9;  /* 29 : 21   clock multiplier         */
+	unsigned _reserved_1_  : 2;  /* 31 : 30                            */
+
+	/* Byte 4 ~ Byte 7 */
+	unsigned div_ref       : 7;   /* 38 : 32   Input clock divider    */
+	unsigned locked        : 1;   /* 39        PLL locked indicator   */
+	unsigned sel_out_dc    : 1;   /* 40        dc output clk enable   */
+	unsigned sel_out_gmc   : 1;   /* 41        gmc output clk enable  */
+	unsigned sel_out_gpu   : 1;   /* 42        gpu output clk enable  */
+	unsigned set_param     : 1;   /* 43        Trigger the update     */
+	unsigned bypass        : 1;   /* 44                               */
+	unsigned powerdown     : 1;   /* 45                               */
+	unsigned _reserved_2_  : 18;  /* 46 : 63   no use                 */
+};
+
+union loongson_gfxpll_reg_bitmap {
+	struct loongson_gfxpll_bitmap bitmap;
+	u32 w[2];
+	u64 d;
+};
+
+static void __gfxpll_rreg(struct loongson_gfxpll *this,
+			  union loongson_gfxpll_reg_bitmap *reg)
+{
+#if defined(CONFIG_64BIT)
+	reg->d = readq(this->mmio);
+#else
+	reg->w[0] = readl(this->mmio);
+	reg->w[1] = readl(this->mmio + 4);
+#endif
+}
+
+/* Update new parameters to the hardware */
+
+static int loongson_gfxpll_update(struct loongson_gfxpll * const this,
+				  struct loongson_gfxpll_parms const *pin)
+{
+	/* None, TODO */
+
+	return 0;
+}
+
+static void loongson_gfxpll_get_rates(struct loongson_gfxpll * const this,
+				      unsigned int *dc,
+				      unsigned int *gmc,
+				      unsigned int *gpu)
+{
+	struct loongson_gfxpll_parms *pparms = &this->parms;
+	union loongson_gfxpll_reg_bitmap gfxpll_reg;
+	unsigned int pre_output;
+	unsigned int dc_mhz;
+	unsigned int gmc_mhz;
+	unsigned int gpu_mhz;
+
+	__gfxpll_rreg(this, &gfxpll_reg);
+
+	pparms->div_ref = gfxpll_reg.bitmap.div_ref;
+	pparms->loopc = gfxpll_reg.bitmap.loopc;
+
+	pparms->div_out_dc = gfxpll_reg.bitmap.div_out_dc;
+	pparms->div_out_gmc = gfxpll_reg.bitmap.div_out_gmc;
+	pparms->div_out_gpu = gfxpll_reg.bitmap.div_out_gpu;
+
+	pre_output = pparms->ref_clock / pparms->div_ref * pparms->loopc;
+
+	dc_mhz = pre_output / pparms->div_out_dc / 1000;
+	gmc_mhz = pre_output / pparms->div_out_gmc / 1000;
+	gpu_mhz = pre_output / pparms->div_out_gpu / 1000;
+
+	if (dc)
+		*dc = dc_mhz;
+
+	if (gmc)
+		*gmc = gmc_mhz;
+
+	if (gpu)
+		*gpu = gpu_mhz;
+}
+
+static void loongson_gfxpll_print(struct loongson_gfxpll * const this,
+				  struct drm_printer *p,
+				  bool verbose)
+{
+	struct loongson_gfxpll_parms *parms = &this->parms;
+	unsigned int dc, gmc, gpu;
+
+	if (verbose) {
+		drm_printf(p, "reference clock: %u\n", parms->ref_clock);
+		drm_printf(p, "div_ref = %u\n", parms->div_ref);
+		drm_printf(p, "loopc = %u\n", parms->loopc);
+
+		drm_printf(p, "div_out_dc = %u\n", parms->div_out_dc);
+		drm_printf(p, "div_out_gmc = %u\n", parms->div_out_gmc);
+		drm_printf(p, "div_out_gpu = %u\n", parms->div_out_gpu);
+	}
+
+	this->funcs->get_rates(this, &dc, &gmc, &gpu);
+
+	drm_printf(p, "dc: %uMHz, gmc: %uMHz, gpu: %uMHz\n", dc, gmc, gpu);
+}
+
+/* GFX (DC, GPU, GMC) PLL initialization and destroy function */
+
+static void loongson_gfxpll_fini(struct drm_device *ddev, void *data)
+{
+	struct loongson_gfxpll *this = (struct loongson_gfxpll *)data;
+
+	iounmap(this->mmio);
+
+	kfree(this);
+}
+
+static int loongson_gfxpll_init(struct loongson_gfxpll * const this)
+{
+	struct loongson_gfxpll_parms *pparms = &this->parms;
+	struct drm_printer printer = drm_info_printer(this->ddev->dev);
+
+	pparms->ref_clock = LSDC_PLL_REF_CLK_KHZ;
+
+	this->mmio = ioremap(this->reg_base, this->reg_size);
+	if (IS_ERR_OR_NULL(this->mmio))
+		return -ENOMEM;
+
+	this->funcs->print(this, &printer, false);
+
+	return 0;
+}
+
+static const struct loongson_gfxpll_funcs lsdc_gmc_gpu_funcs = {
+	.init = loongson_gfxpll_init,
+	.update = loongson_gfxpll_update,
+	.get_rates = loongson_gfxpll_get_rates,
+	.print = loongson_gfxpll_print,
+};
+
+int loongson_gfxpll_create(struct drm_device *ddev,
+			   struct loongson_gfxpll **ppout)
+{
+	struct lsdc_device *ldev = to_lsdc(ddev);
+	const struct loongson_gfx_desc *gfx = to_loongson_gfx(ldev->descp);
+	struct loongson_gfxpll *this;
+	int ret;
+
+	this = kzalloc_obj(*this);
+	if (IS_ERR_OR_NULL(this))
+		return -ENOMEM;
+
+	this->ddev = ddev;
+	this->reg_size = gfx->gfxpll.reg_size;
+	this->reg_base = gfx->conf_reg_base + gfx->gfxpll.reg_offset;
+	this->funcs = &lsdc_gmc_gpu_funcs;
+
+	ret = this->funcs->init(this);
+	if (unlikely(ret)) {
+		kfree(this);
+		return ret;
+	}
+
+	*ppout = this;
+
+	return drmm_add_action_or_reset(ddev, loongson_gfxpll_fini, this);
+}
diff --git a/drivers/gpu/drm/loongson/lsdc_gfxpll.h b/drivers/gpu/drm/loongson/lsdc_gfxpll.h
new file mode 100644
index 000000000..9d59cbfc1
--- /dev/null
+++ b/drivers/gpu/drm/loongson/lsdc_gfxpll.h
@@ -0,0 +1,52 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2023 Loongson Technology Corporation Limited
+ */
+
+#ifndef __LSDC_GFXPLL_H__
+#define __LSDC_GFXPLL_H__
+
+#include <drm/drm_device.h>
+
+struct loongson_gfxpll;
+
+struct loongson_gfxpll_parms {
+	unsigned int ref_clock;
+	unsigned int div_ref;
+	unsigned int loopc;
+	unsigned int div_out_dc;
+	unsigned int div_out_gmc;
+	unsigned int div_out_gpu;
+};
+
+struct loongson_gfxpll_funcs {
+	int (*init)(struct loongson_gfxpll * const this);
+
+	int (*update)(struct loongson_gfxpll * const this,
+		      struct loongson_gfxpll_parms const *pin);
+
+	void (*get_rates)(struct loongson_gfxpll * const this,
+			  unsigned int *dc, unsigned int *gmc, unsigned int *gpu);
+
+	void (*print)(struct loongson_gfxpll * const this,
+		      struct drm_printer *printer, bool verbose);
+};
+
+struct loongson_gfxpll {
+	struct drm_device *ddev;
+	void __iomem *mmio;
+
+	/* PLL register offset */
+	u32 reg_base;
+	/* PLL register size in bytes */
+	u32 reg_size;
+
+	const struct loongson_gfxpll_funcs *funcs;
+
+	struct loongson_gfxpll_parms parms;
+};
+
+int loongson_gfxpll_create(struct drm_device *ddev,
+			   struct loongson_gfxpll **ppout);
+
+#endif
diff --git a/drivers/gpu/drm/loongson/lsdc_i2c.c b/drivers/gpu/drm/loongson/lsdc_i2c.c
new file mode 100644
index 000000000..b5ff68866
--- /dev/null
+++ b/drivers/gpu/drm/loongson/lsdc_i2c.c
@@ -0,0 +1,179 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2023 Loongson Technology Corporation Limited
+ */
+
+#include <drm/drm_managed.h>
+#include <drm/drm_print.h>
+
+#include "lsdc_drv.h"
+#include "lsdc_output.h"
+
+/*
+ * __lsdc_gpio_i2c_set - set the state of a gpio pin indicated by mask
+ * @mask: gpio pin mask
+ * @state: "0" for low, "1" for high
+ */
+static void __lsdc_gpio_i2c_set(struct lsdc_i2c * const li2c, int mask, int state)
+{
+	struct lsdc_device *ldev = to_lsdc(li2c->ddev);
+	unsigned long flags;
+	u8 val;
+
+	spin_lock_irqsave(&ldev->reglock, flags);
+
+	if (state) {
+		/*
+		 * Setting this pin as input directly, write 1 for input.
+		 * The external pull-up resistor will pull the level up
+		 */
+		val = readb(li2c->dir_reg);
+		val |= mask;
+		writeb(val, li2c->dir_reg);
+	} else {
+		/* First set this pin as output, write 0 for output */
+		val = readb(li2c->dir_reg);
+		val &= ~mask;
+		writeb(val, li2c->dir_reg);
+
+		/* Then, make this pin output 0 */
+		val = readb(li2c->dat_reg);
+		val &= ~mask;
+		writeb(val, li2c->dat_reg);
+	}
+
+	spin_unlock_irqrestore(&ldev->reglock, flags);
+}
+
+/*
+ * __lsdc_gpio_i2c_get - read value back from the gpio pin indicated by mask
+ * @mask: gpio pin mask
+ * return "0" for low, "1" for high
+ */
+static int __lsdc_gpio_i2c_get(struct lsdc_i2c * const li2c, int mask)
+{
+	struct lsdc_device *ldev = to_lsdc(li2c->ddev);
+	unsigned long flags;
+	u8 val;
+
+	spin_lock_irqsave(&ldev->reglock, flags);
+
+	/* First set this pin as input */
+	val = readb(li2c->dir_reg);
+	val |= mask;
+	writeb(val, li2c->dir_reg);
+
+	/* Then get level state from this pin */
+	val = readb(li2c->dat_reg);
+
+	spin_unlock_irqrestore(&ldev->reglock, flags);
+
+	return (val & mask) ? 1 : 0;
+}
+
+static void lsdc_gpio_i2c_set_sda(void *i2c, int state)
+{
+	struct lsdc_i2c * const li2c = (struct lsdc_i2c *)i2c;
+	/* set state on the li2c->sda pin */
+	return __lsdc_gpio_i2c_set(li2c, li2c->sda, state);
+}
+
+static void lsdc_gpio_i2c_set_scl(void *i2c, int state)
+{
+	struct lsdc_i2c * const li2c = (struct lsdc_i2c *)i2c;
+	/* set state on the li2c->scl pin */
+	return __lsdc_gpio_i2c_set(li2c, li2c->scl, state);
+}
+
+static int lsdc_gpio_i2c_get_sda(void *i2c)
+{
+	struct lsdc_i2c * const li2c = (struct lsdc_i2c *)i2c;
+	/* read value from the li2c->sda pin */
+	return __lsdc_gpio_i2c_get(li2c, li2c->sda);
+}
+
+static int lsdc_gpio_i2c_get_scl(void *i2c)
+{
+	struct lsdc_i2c * const li2c = (struct lsdc_i2c *)i2c;
+	/* read the value from the li2c->scl pin */
+	return __lsdc_gpio_i2c_get(li2c, li2c->scl);
+}
+
+static void lsdc_destroy_i2c(struct drm_device *ddev, void *data)
+{
+	struct lsdc_i2c *li2c = (struct lsdc_i2c *)data;
+
+	if (li2c) {
+		i2c_del_adapter(&li2c->adapter);
+		kfree(li2c);
+	}
+}
+
+/*
+ * The DC in ls7a1000/ls7a2000/ls2k2000 has builtin gpio hardware
+ *
+ * @reg_base: gpio reg base
+ * @index: output channel index, 0 for PIPE0, 1 for PIPE1
+ */
+int lsdc_create_i2c_chan(struct drm_device *ddev,
+			 struct lsdc_display_pipe *dispipe,
+			 unsigned int index)
+{
+	struct lsdc_device *ldev = to_lsdc(ddev);
+	struct i2c_adapter *adapter;
+	struct lsdc_i2c *li2c;
+	int ret;
+
+	li2c = kzalloc_obj(*li2c);
+	if (!li2c)
+		return -ENOMEM;
+
+	dispipe->li2c = li2c;
+
+	if (index == 0) {
+		li2c->sda = 0x01;  /* pin 0 */
+		li2c->scl = 0x02;  /* pin 1 */
+	} else if (index == 1) {
+		li2c->sda = 0x04;  /* pin 2 */
+		li2c->scl = 0x08;  /* pin 3 */
+	} else {
+		return -ENOENT;
+	}
+
+	li2c->ddev = ddev;
+	li2c->dir_reg = ldev->reg_base + LS7A_DC_GPIO_DIR_REG;
+	li2c->dat_reg = ldev->reg_base + LS7A_DC_GPIO_DAT_REG;
+
+	li2c->bit.setsda = lsdc_gpio_i2c_set_sda;
+	li2c->bit.setscl = lsdc_gpio_i2c_set_scl;
+	li2c->bit.getsda = lsdc_gpio_i2c_get_sda;
+	li2c->bit.getscl = lsdc_gpio_i2c_get_scl;
+	li2c->bit.udelay = 5;
+	li2c->bit.timeout = usecs_to_jiffies(2200);
+	li2c->bit.data = li2c;
+
+	adapter = &li2c->adapter;
+	adapter->algo_data = &li2c->bit;
+	adapter->owner = THIS_MODULE;
+	adapter->dev.parent = ddev->dev;
+	adapter->nr = -1;
+
+	snprintf(adapter->name, sizeof(adapter->name), "lsdc-i2c%u", index);
+
+	i2c_set_adapdata(adapter, li2c);
+
+	ret = i2c_bit_add_bus(adapter);
+	if (ret) {
+		kfree(li2c);
+		return ret;
+	}
+
+	ret = drmm_add_action_or_reset(ddev, lsdc_destroy_i2c, li2c);
+	if (ret)
+		return ret;
+
+	drm_info(ddev, "%s(sda pin mask=%u, scl pin mask=%u) created\n",
+		 adapter->name, li2c->sda, li2c->scl);
+
+	return 0;
+}
diff --git a/drivers/gpu/drm/loongson/lsdc_i2c.h b/drivers/gpu/drm/loongson/lsdc_i2c.h
new file mode 100644
index 000000000..88cd1a181
--- /dev/null
+++ b/drivers/gpu/drm/loongson/lsdc_i2c.h
@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2023 Loongson Technology Corporation Limited
+ */
+
+#ifndef __LSDC_I2C_H__
+#define __LSDC_I2C_H__
+
+#include <linux/i2c.h>
+#include <linux/i2c-algo-bit.h>
+
+struct lsdc_i2c {
+	struct i2c_adapter adapter;
+	struct i2c_algo_bit_data bit;
+	struct drm_device *ddev;
+	void __iomem *dir_reg;
+	void __iomem *dat_reg;
+	/* pin bit mask */
+	u8 sda;
+	u8 scl;
+};
+
+struct lsdc_display_pipe;
+
+int lsdc_create_i2c_chan(struct drm_device *ddev,
+			 struct lsdc_display_pipe *dispipe,
+			 unsigned int index);
+
+#endif
diff --git a/drivers/gpu/drm/loongson/lsdc_irq.c b/drivers/gpu/drm/loongson/lsdc_irq.c
new file mode 100644
index 000000000..e8b7cc327
--- /dev/null
+++ b/drivers/gpu/drm/loongson/lsdc_irq.c
@@ -0,0 +1,75 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2023 Loongson Technology Corporation Limited
+ */
+
+#include <drm/drm_print.h>
+#include <drm/drm_vblank.h>
+
+#include "lsdc_irq.h"
+
+/*
+ * For the DC in LS7A2000, clearing interrupt status is achieved by
+ * write "1" to LSDC_INT_REG.
+ *
+ * For the DC in LS7A1000, clear interrupt status is achieved by write "0"
+ * to LSDC_INT_REG.
+ *
+ * Two different hardware engineers modify it as their will.
+ */
+
+irqreturn_t ls7a2000_dc_irq_handler(int irq, void *arg)
+{
+	struct drm_device *ddev = arg;
+	struct lsdc_device *ldev = to_lsdc(ddev);
+	u32 val;
+
+	/* Read the interrupt status */
+	val = lsdc_rreg32(ldev, LSDC_INT_REG);
+	if ((val & INT_STATUS_MASK) == 0) {
+		drm_warn(ddev, "no interrupt occurs\n");
+		return IRQ_NONE;
+	}
+
+	ldev->irq_status = val;
+
+	/* write "1" to clear the interrupt status */
+	lsdc_wreg32(ldev, LSDC_INT_REG, val);
+
+	if (ldev->irq_status & INT_CRTC0_VSYNC)
+		drm_handle_vblank(ddev, 0);
+
+	if (ldev->irq_status & INT_CRTC1_VSYNC)
+		drm_handle_vblank(ddev, 1);
+
+	return IRQ_HANDLED;
+}
+
+/* For the DC in LS7A1000 and LS2K1000 */
+irqreturn_t ls7a1000_dc_irq_handler(int irq, void *arg)
+{
+	struct drm_device *ddev = arg;
+	struct lsdc_device *ldev = to_lsdc(ddev);
+	u32 val;
+
+	/* Read the interrupt status */
+	val = lsdc_rreg32(ldev, LSDC_INT_REG);
+	if ((val & INT_STATUS_MASK) == 0) {
+		drm_warn(ddev, "no interrupt occurs\n");
+		return IRQ_NONE;
+	}
+
+	ldev->irq_status = val;
+
+	/* write "0" to clear the interrupt status */
+	val &= ~(INT_CRTC0_VSYNC | INT_CRTC1_VSYNC);
+	lsdc_wreg32(ldev, LSDC_INT_REG, val);
+
+	if (ldev->irq_status & INT_CRTC0_VSYNC)
+		drm_handle_vblank(ddev, 0);
+
+	if (ldev->irq_status & INT_CRTC1_VSYNC)
+		drm_handle_vblank(ddev, 1);
+
+	return IRQ_HANDLED;
+}
diff --git a/drivers/gpu/drm/loongson/lsdc_irq.h b/drivers/gpu/drm/loongson/lsdc_irq.h
new file mode 100644
index 000000000..726cb3018
--- /dev/null
+++ b/drivers/gpu/drm/loongson/lsdc_irq.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2023 Loongson Technology Corporation Limited
+ */
+
+#ifndef __LSDC_IRQ_H__
+#define __LSDC_IRQ_H__
+
+#include <linux/irqreturn.h>
+
+#include "lsdc_drv.h"
+
+irqreturn_t ls7a1000_dc_irq_handler(int irq, void *arg);
+irqreturn_t ls7a2000_dc_irq_handler(int irq, void *arg);
+
+#endif
diff --git a/drivers/gpu/drm/loongson/lsdc_output.h b/drivers/gpu/drm/loongson/lsdc_output.h
new file mode 100644
index 000000000..097789051
--- /dev/null
+++ b/drivers/gpu/drm/loongson/lsdc_output.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2023 Loongson Technology Corporation Limited
+ */
+
+#ifndef __LSDC_OUTPUT_H__
+#define __LSDC_OUTPUT_H__
+
+#include "lsdc_drv.h"
+
+int ls7a1000_output_init(struct drm_device *ddev,
+			 struct lsdc_display_pipe *dispipe,
+			 struct i2c_adapter *ddc,
+			 unsigned int index);
+
+int ls7a2000_output_init(struct drm_device *ldev,
+			 struct lsdc_display_pipe *dispipe,
+			 struct i2c_adapter *ddc,
+			 unsigned int index);
+
+#endif
diff --git a/drivers/gpu/drm/loongson/lsdc_output_7a1000.c b/drivers/gpu/drm/loongson/lsdc_output_7a1000.c
new file mode 100644
index 000000000..5c483baa3
--- /dev/null
+++ b/drivers/gpu/drm/loongson/lsdc_output_7a1000.c
@@ -0,0 +1,178 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2023 Loongson Technology Corporation Limited
+ */
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+#include "lsdc_drv.h"
+#include "lsdc_output.h"
+
+/*
+ * The display controller in the LS7A1000 exports two DVO interfaces, thus
+ * external encoder is required, except connected to the DPI panel directly.
+ *
+ *       ___________________                                     _________
+ *      |            -------|                                   |         |
+ *      |  CRTC0 --> | DVO0 ----> Encoder0 ---> Connector0 ---> | Display |
+ *      |  _   _     -------|        ^             ^            |_________|
+ *      | | | | |  +------+ |        |             |
+ *      | |_| |_|  | i2c6 | <--------+-------------+
+ *      |          +------+ |
+ *      |                   |
+ *      |  DC in LS7A1000   |
+ *      |                   |
+ *      |  _   _   +------+ |
+ *      | | | | |  | i2c7 | <--------+-------------+
+ *      | |_| |_|  +------+ |        |             |             _________
+ *      |            -------|        |             |            |         |
+ *      |  CRTC1 --> | DVO1 ----> Encoder1 ---> Connector1 ---> |  Panel  |
+ *      |            -------|                                   |_________|
+ *      |___________________|
+ *
+ * Currently, we assume the external encoders connected to the DVO are
+ * transparent. Loongson's DVO interface can directly drive RGB888 panels.
+ *
+ *  TODO: Add support for non-transparent encoders
+ */
+
+static int ls7a1000_dpi_connector_get_modes(struct drm_connector *conn)
+{
+	int num;
+
+	if (conn->ddc) {
+		const struct drm_edid *drm_edid;
+
+		drm_edid = drm_edid_read(conn);
+		drm_edid_connector_update(conn, drm_edid);
+		num = drm_edid_connector_add_modes(conn);
+		drm_edid_free(drm_edid);
+
+		return num;
+	}
+
+	num = drm_add_modes_noedid(conn, 1920, 1200);
+
+	drm_set_preferred_mode(conn, 1024, 768);
+
+	return num;
+}
+
+static struct drm_encoder *
+ls7a1000_dpi_connector_get_best_encoder(struct drm_connector *connector,
+					struct drm_atomic_commit *state)
+{
+	struct lsdc_output *output = connector_to_lsdc_output(connector);
+
+	return &output->encoder;
+}
+
+static const struct drm_connector_helper_funcs
+ls7a1000_dpi_connector_helpers = {
+	.atomic_best_encoder = ls7a1000_dpi_connector_get_best_encoder,
+	.get_modes = ls7a1000_dpi_connector_get_modes,
+};
+
+static enum drm_connector_status
+ls7a1000_dpi_connector_detect(struct drm_connector *connector, bool force)
+{
+	struct i2c_adapter *ddc = connector->ddc;
+
+	if (ddc) {
+		if (drm_probe_ddc(ddc))
+			return connector_status_connected;
+
+		return connector_status_disconnected;
+	}
+
+	return connector_status_unknown;
+}
+
+static const struct drm_connector_funcs ls7a1000_dpi_connector_funcs = {
+	.detect = ls7a1000_dpi_connector_detect,
+	.fill_modes = drm_helper_probe_single_connector_modes,
+	.destroy = drm_connector_cleanup,
+	.reset = drm_atomic_helper_connector_reset,
+	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state
+};
+
+static void ls7a1000_pipe0_encoder_reset(struct drm_encoder *encoder)
+{
+	struct drm_device *ddev = encoder->dev;
+	struct lsdc_device *ldev = to_lsdc(ddev);
+
+	/*
+	 * We need this for S3 support, screen will not lightup if don't set
+	 * this register correctly.
+	 */
+	lsdc_wreg32(ldev, LSDC_CRTC0_DVO_CONF_REG,
+		    PHY_CLOCK_POL | PHY_CLOCK_EN | PHY_DATA_EN);
+}
+
+static void ls7a1000_pipe1_encoder_reset(struct drm_encoder *encoder)
+{
+	struct drm_device *ddev = encoder->dev;
+	struct lsdc_device *ldev = to_lsdc(ddev);
+
+	/*
+	 * We need this for S3 support, screen will not lightup if don't set
+	 * this register correctly.
+	 */
+
+	/* DVO */
+	lsdc_wreg32(ldev, LSDC_CRTC1_DVO_CONF_REG,
+		    BIT(31) | PHY_CLOCK_POL | PHY_CLOCK_EN | PHY_DATA_EN);
+}
+
+static const struct drm_encoder_funcs ls7a1000_encoder_funcs[2] = {
+	{
+		.reset = ls7a1000_pipe0_encoder_reset,
+		.destroy = drm_encoder_cleanup,
+	},
+	{
+		.reset = ls7a1000_pipe1_encoder_reset,
+		.destroy = drm_encoder_cleanup,
+	},
+};
+
+int ls7a1000_output_init(struct drm_device *ddev,
+			 struct lsdc_display_pipe *dispipe,
+			 struct i2c_adapter *ddc,
+			 unsigned int index)
+{
+	struct lsdc_output *output = &dispipe->output;
+	struct drm_encoder *encoder = &output->encoder;
+	struct drm_connector *connector = &output->connector;
+	int ret;
+
+	ret = drm_encoder_init(ddev, encoder, &ls7a1000_encoder_funcs[index],
+			       DRM_MODE_ENCODER_TMDS, "encoder-%u", index);
+	if (ret)
+		return ret;
+
+	encoder->possible_crtcs = BIT(index);
+
+	ret = drm_connector_init_with_ddc(ddev, connector,
+					  &ls7a1000_dpi_connector_funcs,
+					  DRM_MODE_CONNECTOR_DPI, ddc);
+	if (ret)
+		return ret;
+
+	drm_info(ddev, "display pipe-%u has a DVO\n", index);
+
+	drm_connector_helper_add(connector, &ls7a1000_dpi_connector_helpers);
+
+	drm_connector_attach_encoder(connector, encoder);
+
+	connector->polled = DRM_CONNECTOR_POLL_CONNECT |
+			    DRM_CONNECTOR_POLL_DISCONNECT;
+
+	connector->interlace_allowed = 0;
+	connector->doublescan_allowed = 0;
+
+	return 0;
+}
diff --git a/drivers/gpu/drm/loongson/lsdc_output_7a2000.c b/drivers/gpu/drm/loongson/lsdc_output_7a2000.c
new file mode 100644
index 000000000..a9798b3da
--- /dev/null
+++ b/drivers/gpu/drm/loongson/lsdc_output_7a2000.c
@@ -0,0 +1,552 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2023 Loongson Technology Corporation Limited
+ */
+
+#include <linux/delay.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_debugfs.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+#include "lsdc_drv.h"
+#include "lsdc_output.h"
+
+/*
+ * The display controller in LS7A2000 has two display pipes
+ * Display pipe 0 is attached with a built-in transparent VGA encoder and
+ * a built-in HDMI encoder.
+ * Display pipe 1 has only one built-in HDMI encoder connected.
+ *       ______________________                          _____________
+ *      |             +-----+  |                        |             |
+ *      | CRTC0 -+--> | VGA |  ----> VGA Connector ---> | VGA Monitor |<---+
+ *      |        |    +-----+  |                        |_____________|    |
+ *      |        |             |                         ______________    |
+ *      |        |    +------+ |                        |              |   |
+ *      |        +--> | HDMI | ----> HDMI Connector --> | HDMI Monitor |<--+
+ *      |             +------+ |                        |______________|   |
+ *      |            +------+  |                                           |
+ *      |            | i2c6 |  <-------------------------------------------+
+ *      |            +------+  |
+ *      |                      |
+ *      |    DC in LS7A2000    |
+ *      |                      |
+ *      |            +------+  |
+ *      |            | i2c7 |  <--------------------------------+
+ *      |            +------+  |                                |
+ *      |                      |                          ______|_______
+ *      |            +------+  |                         |              |
+ *      | CRTC1 ---> | HDMI |  ----> HDMI Connector ---> | HDMI Monitor |
+ *      |            +------+  |                         |______________|
+ *      |______________________|
+ */
+
+static int ls7a2000_connector_get_modes(struct drm_connector *connector)
+{
+	int num;
+
+	if (connector->ddc) {
+		const struct drm_edid *drm_edid;
+
+		drm_edid = drm_edid_read(connector);
+		drm_edid_connector_update(connector, drm_edid);
+		num = drm_edid_connector_add_modes(connector);
+		drm_edid_free(drm_edid);
+
+		return num;
+	}
+
+	num = drm_add_modes_noedid(connector, 1920, 1200);
+
+	drm_set_preferred_mode(connector, 1024, 768);
+
+	return num;
+}
+
+static struct drm_encoder *
+ls7a2000_connector_get_best_encoder(struct drm_connector *connector,
+				    struct drm_atomic_commit *state)
+{
+	struct lsdc_output *output = connector_to_lsdc_output(connector);
+
+	return &output->encoder;
+}
+
+static const struct drm_connector_helper_funcs ls7a2000_connector_helpers = {
+	.atomic_best_encoder = ls7a2000_connector_get_best_encoder,
+	.get_modes = ls7a2000_connector_get_modes,
+};
+
+/* debugfs */
+
+#define LSDC_HDMI_REG(i, reg) {                               \
+	.name = __stringify_1(LSDC_HDMI##i##_##reg##_REG),    \
+	.offset = LSDC_HDMI##i##_##reg##_REG,                 \
+}
+
+static const struct lsdc_reg32 ls7a2000_hdmi0_encoder_regs[] = {
+	LSDC_HDMI_REG(0, ZONE),
+	LSDC_HDMI_REG(0, INTF_CTRL),
+	LSDC_HDMI_REG(0, PHY_CTRL),
+	LSDC_HDMI_REG(0, PHY_PLL),
+	LSDC_HDMI_REG(0, AVI_INFO_CRTL),
+	LSDC_HDMI_REG(0, PHY_CAL),
+	LSDC_HDMI_REG(0, AUDIO_PLL_LO),
+	LSDC_HDMI_REG(0, AUDIO_PLL_HI),
+	{NULL, 0},  /* MUST be {NULL, 0} terminated */
+};
+
+static const struct lsdc_reg32 ls7a2000_hdmi1_encoder_regs[] = {
+	LSDC_HDMI_REG(1, ZONE),
+	LSDC_HDMI_REG(1, INTF_CTRL),
+	LSDC_HDMI_REG(1, PHY_CTRL),
+	LSDC_HDMI_REG(1, PHY_PLL),
+	LSDC_HDMI_REG(1, AVI_INFO_CRTL),
+	LSDC_HDMI_REG(1, PHY_CAL),
+	LSDC_HDMI_REG(1, AUDIO_PLL_LO),
+	LSDC_HDMI_REG(1, AUDIO_PLL_HI),
+	{NULL, 0},  /* MUST be {NULL, 0} terminated */
+};
+
+static int ls7a2000_hdmi_encoder_regs_show(struct seq_file *m, void *data)
+{
+	struct drm_info_node *node = (struct drm_info_node *)m->private;
+	struct drm_device *ddev = node->minor->dev;
+	struct lsdc_device *ldev = to_lsdc(ddev);
+	const struct lsdc_reg32 *preg;
+
+	preg = (const struct lsdc_reg32 *)node->info_ent->data;
+
+	while (preg->name) {
+		u32 offset = preg->offset;
+
+		seq_printf(m, "%s (0x%04x): 0x%08x\n",
+			   preg->name, offset, lsdc_rreg32(ldev, offset));
+		++preg;
+	}
+
+	return 0;
+}
+
+static const struct drm_info_list ls7a2000_hdmi0_debugfs_files[] = {
+	{ "regs", ls7a2000_hdmi_encoder_regs_show, 0, (void *)ls7a2000_hdmi0_encoder_regs },
+};
+
+static const struct drm_info_list ls7a2000_hdmi1_debugfs_files[] = {
+	{ "regs", ls7a2000_hdmi_encoder_regs_show, 0, (void *)ls7a2000_hdmi1_encoder_regs },
+};
+
+static void ls7a2000_hdmi0_late_register(struct drm_connector *connector,
+					 struct dentry *root)
+{
+	struct drm_device *ddev = connector->dev;
+	struct drm_minor *minor = ddev->primary;
+
+	drm_debugfs_create_files(ls7a2000_hdmi0_debugfs_files,
+				 ARRAY_SIZE(ls7a2000_hdmi0_debugfs_files),
+				 root, minor);
+}
+
+static void ls7a2000_hdmi1_late_register(struct drm_connector *connector,
+					 struct dentry *root)
+{
+	struct drm_device *ddev = connector->dev;
+	struct drm_minor *minor = ddev->primary;
+
+	drm_debugfs_create_files(ls7a2000_hdmi1_debugfs_files,
+				 ARRAY_SIZE(ls7a2000_hdmi1_debugfs_files),
+				 root, minor);
+}
+
+/* monitor present detection */
+
+static enum drm_connector_status
+ls7a2000_hdmi0_vga_connector_detect(struct drm_connector *connector, bool force)
+{
+	struct drm_device *ddev = connector->dev;
+	struct lsdc_device *ldev = to_lsdc(ddev);
+	u32 val;
+
+	val = lsdc_rreg32(ldev, LSDC_HDMI_HPD_STATUS_REG);
+
+	if (val & HDMI0_HPD_FLAG)
+		return connector_status_connected;
+
+	if (connector->ddc) {
+		if (drm_probe_ddc(connector->ddc))
+			return connector_status_connected;
+
+		return connector_status_disconnected;
+	}
+
+	return connector_status_unknown;
+}
+
+static enum drm_connector_status
+ls7a2000_hdmi1_connector_detect(struct drm_connector *connector, bool force)
+{
+	struct lsdc_device *ldev = to_lsdc(connector->dev);
+	u32 val;
+
+	val = lsdc_rreg32(ldev, LSDC_HDMI_HPD_STATUS_REG);
+
+	if (val & HDMI1_HPD_FLAG)
+		return connector_status_connected;
+
+	return connector_status_disconnected;
+}
+
+static const struct drm_connector_funcs ls7a2000_hdmi_connector_funcs[2] = {
+	{
+		.detect = ls7a2000_hdmi0_vga_connector_detect,
+		.fill_modes = drm_helper_probe_single_connector_modes,
+		.destroy = drm_connector_cleanup,
+		.reset = drm_atomic_helper_connector_reset,
+		.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+		.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+		.debugfs_init = ls7a2000_hdmi0_late_register,
+	},
+	{
+		.detect = ls7a2000_hdmi1_connector_detect,
+		.fill_modes = drm_helper_probe_single_connector_modes,
+		.destroy = drm_connector_cleanup,
+		.reset = drm_atomic_helper_connector_reset,
+		.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+		.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+		.debugfs_init = ls7a2000_hdmi1_late_register,
+	},
+};
+
+/* Even though some board has only one hdmi on display pipe 1,
+ * We still need hook lsdc_encoder_funcs up on display pipe 0,
+ * This is because we need its reset() callback get called, to
+ * set the LSDC_HDMIx_CTRL_REG using software gpio emulated i2c.
+ * Otherwise, the firmware may set LSDC_HDMIx_CTRL_REG blindly.
+ */
+static void ls7a2000_hdmi0_encoder_reset(struct drm_encoder *encoder)
+{
+	struct drm_device *ddev = encoder->dev;
+	struct lsdc_device *ldev = to_lsdc(ddev);
+	u32 val;
+
+	val = PHY_CLOCK_POL | PHY_CLOCK_EN | PHY_DATA_EN;
+	lsdc_wreg32(ldev, LSDC_CRTC0_DVO_CONF_REG, val);
+
+	/* using software gpio emulated i2c */
+	val = lsdc_rreg32(ldev, LSDC_HDMI0_INTF_CTRL_REG);
+	val &= ~HW_I2C_EN;
+	lsdc_wreg32(ldev, LSDC_HDMI0_INTF_CTRL_REG, val);
+
+	/* help the hdmi phy to get out of reset state */
+	lsdc_wreg32(ldev, LSDC_HDMI0_PHY_CTRL_REG, HDMI_PHY_RESET_N);
+
+	mdelay(20);
+
+	drm_dbg(ddev, "HDMI-0 Reset\n");
+}
+
+static void ls7a2000_hdmi1_encoder_reset(struct drm_encoder *encoder)
+{
+	struct drm_device *ddev = encoder->dev;
+	struct lsdc_device *ldev = to_lsdc(ddev);
+	u32 val;
+
+	val = PHY_CLOCK_POL | PHY_CLOCK_EN | PHY_DATA_EN;
+	lsdc_wreg32(ldev, LSDC_CRTC1_DVO_CONF_REG, val);
+
+	/* using software gpio emulated i2c */
+	val = lsdc_rreg32(ldev, LSDC_HDMI1_INTF_CTRL_REG);
+	val &= ~HW_I2C_EN;
+	lsdc_wreg32(ldev, LSDC_HDMI1_INTF_CTRL_REG, val);
+
+	/*  help the hdmi phy to get out of reset state */
+	lsdc_wreg32(ldev, LSDC_HDMI1_PHY_CTRL_REG, HDMI_PHY_RESET_N);
+
+	mdelay(20);
+
+	drm_dbg(ddev, "HDMI-1 Reset\n");
+}
+
+static const struct drm_encoder_funcs ls7a2000_encoder_funcs[2] = {
+	{
+		.reset = ls7a2000_hdmi0_encoder_reset,
+		.destroy = drm_encoder_cleanup,
+	},
+	{
+		.reset = ls7a2000_hdmi1_encoder_reset,
+		.destroy = drm_encoder_cleanup,
+	},
+};
+
+static int ls7a2000_hdmi_set_avi_infoframe(struct drm_encoder *encoder,
+					   struct drm_display_mode *mode)
+{
+	struct lsdc_output *output = encoder_to_lsdc_output(encoder);
+	struct lsdc_display_pipe *dispipe = output_to_display_pipe(output);
+	unsigned int index = dispipe->index;
+	struct drm_device *ddev = encoder->dev;
+	struct lsdc_device *ldev = to_lsdc(ddev);
+	struct hdmi_avi_infoframe infoframe;
+	u8 buffer[HDMI_INFOFRAME_SIZE(AVI)];
+	unsigned char *ptr = &buffer[HDMI_INFOFRAME_HEADER_SIZE];
+	unsigned int content0, content1, content2, content3;
+	int err;
+
+	err = drm_hdmi_avi_infoframe_from_display_mode(&infoframe,
+						       &output->connector,
+						       mode);
+	if (err < 0) {
+		drm_err(ddev, "failed to setup AVI infoframe: %d\n", err);
+		return err;
+	}
+
+	/* Fixed infoframe configuration not linked to the mode */
+	infoframe.colorspace = HDMI_COLORSPACE_RGB;
+	infoframe.quantization_range = HDMI_QUANTIZATION_RANGE_DEFAULT;
+	infoframe.colorimetry = HDMI_COLORIMETRY_NONE;
+
+	err = hdmi_avi_infoframe_pack(&infoframe, buffer, sizeof(buffer));
+	if (err < 0) {
+		drm_err(ddev, "failed to pack AVI infoframe: %d\n", err);
+			return err;
+	}
+
+	content0 = *(unsigned int *)ptr;
+	content1 = *(ptr + 4);
+	content2 = *(unsigned int *)(ptr + 5);
+	content3 = *(unsigned int *)(ptr + 9);
+
+	lsdc_pipe_wreg32(ldev, LSDC_HDMI0_AVI_CONTENT0, index, content0);
+	lsdc_pipe_wreg32(ldev, LSDC_HDMI0_AVI_CONTENT1, index, content1);
+	lsdc_pipe_wreg32(ldev, LSDC_HDMI0_AVI_CONTENT2, index, content2);
+	lsdc_pipe_wreg32(ldev, LSDC_HDMI0_AVI_CONTENT3, index, content3);
+
+	lsdc_pipe_wreg32(ldev, LSDC_HDMI0_AVI_INFO_CRTL_REG, index,
+			 AVI_PKT_ENABLE | AVI_PKT_UPDATE);
+
+	drm_dbg(ddev, "Update HDMI-%u avi infoframe\n", index);
+
+	return 0;
+}
+
+static void ls7a2000_hdmi_atomic_disable(struct drm_encoder *encoder,
+					 struct drm_atomic_commit *state)
+{
+	struct lsdc_output *output = encoder_to_lsdc_output(encoder);
+	struct lsdc_display_pipe *dispipe = output_to_display_pipe(output);
+	unsigned int index = dispipe->index;
+	struct drm_device *ddev = encoder->dev;
+	struct lsdc_device *ldev = to_lsdc(ddev);
+	u32 val;
+
+	/* Disable the hdmi phy */
+	val = lsdc_pipe_rreg32(ldev, LSDC_HDMI0_PHY_CTRL_REG, index);
+	val &= ~HDMI_PHY_EN;
+	lsdc_pipe_wreg32(ldev, LSDC_HDMI0_PHY_CTRL_REG, index, val);
+
+	/* Disable the hdmi interface */
+	val = lsdc_pipe_rreg32(ldev, LSDC_HDMI0_INTF_CTRL_REG, index);
+	val &= ~HDMI_INTERFACE_EN;
+	lsdc_pipe_wreg32(ldev, LSDC_HDMI0_INTF_CTRL_REG, index, val);
+
+	drm_dbg(ddev, "HDMI-%u disabled\n", index);
+}
+
+static void ls7a2000_hdmi_atomic_enable(struct drm_encoder *encoder,
+					struct drm_atomic_commit *state)
+{
+	struct drm_device *ddev = encoder->dev;
+	struct lsdc_device *ldev = to_lsdc(ddev);
+	struct lsdc_output *output = encoder_to_lsdc_output(encoder);
+	struct lsdc_display_pipe *dispipe = output_to_display_pipe(output);
+	unsigned int index = dispipe->index;
+	u32 val;
+
+	/* datasheet say it should larger than 48 */
+	val = 64 << HDMI_H_ZONE_IDLE_SHIFT | 64 << HDMI_V_ZONE_IDLE_SHIFT;
+
+	lsdc_pipe_wreg32(ldev, LSDC_HDMI0_ZONE_REG, index, val);
+
+	val = HDMI_PHY_TERM_STATUS |
+	      HDMI_PHY_TERM_DET_EN |
+	      HDMI_PHY_TERM_H_EN |
+	      HDMI_PHY_TERM_L_EN |
+	      HDMI_PHY_RESET_N |
+	      HDMI_PHY_EN;
+
+	lsdc_pipe_wreg32(ldev, LSDC_HDMI0_PHY_CTRL_REG, index, val);
+
+	udelay(2);
+
+	val = HDMI_CTL_PERIOD_MODE |
+	      HDMI_AUDIO_EN |
+	      HDMI_PACKET_EN |
+	      HDMI_INTERFACE_EN |
+	      (8 << HDMI_VIDEO_PREAMBLE_SHIFT);
+
+	lsdc_pipe_wreg32(ldev, LSDC_HDMI0_INTF_CTRL_REG, index, val);
+
+	drm_dbg(ddev, "HDMI-%u enabled\n", index);
+}
+
+/*
+ *  Fout = M * Fin
+ *
+ *  M = (4 * LF) / (IDF * ODF)
+ *
+ *  IDF: Input Division Factor
+ *  ODF: Output Division Factor
+ *   LF: Loop Factor
+ *    M: Required Mult
+ *
+ *  +--------------------------------------------------------+
+ *  |     Fin (kHZ)     | M  | IDF | LF | ODF |   Fout(Mhz)  |
+ *  |-------------------+----+-----+----+-----+--------------|
+ *  |  170000 ~ 340000  | 10 | 16  | 40 |  1  | 1700 ~ 3400  |
+ *  |   85000 ~ 170000  | 10 |  8  | 40 |  2  |  850 ~ 1700  |
+ *  |   42500 ~  85000  | 10 |  4  | 40 |  4  |  425 ~ 850   |
+ *  |   21250 ~  42500  | 10 |  2  | 40 |  8  | 212.5 ~ 425  |
+ *  |   20000 ~  21250  | 10 |  1  | 40 | 16  |  200 ~ 212.5 |
+ *  +--------------------------------------------------------+
+ */
+static void ls7a2000_hdmi_phy_pll_config(struct lsdc_device *ldev,
+					 int fin,
+					 unsigned int index)
+{
+	struct drm_device *ddev = &ldev->base;
+	int count = 0;
+	u32 val;
+
+	/* Firstly, disable phy pll */
+	lsdc_pipe_wreg32(ldev, LSDC_HDMI0_PHY_PLL_REG, index, 0x0);
+
+	/*
+	 * Most of time, loongson HDMI require M = 10
+	 * for example, 10 = (4 * 40) / (8 * 2)
+	 * here, write "1" to the ODF will get "2"
+	 */
+
+	if (fin >= 170000)
+		val = (16 << HDMI_PLL_IDF_SHIFT) |
+		      (40 << HDMI_PLL_LF_SHIFT) |
+		      (0 << HDMI_PLL_ODF_SHIFT);
+	else if (fin >= 85000)
+		val = (8 << HDMI_PLL_IDF_SHIFT) |
+		      (40 << HDMI_PLL_LF_SHIFT) |
+		      (1 << HDMI_PLL_ODF_SHIFT);
+	else if (fin >= 42500)
+		val = (4 << HDMI_PLL_IDF_SHIFT) |
+		      (40 << HDMI_PLL_LF_SHIFT) |
+		      (2 << HDMI_PLL_ODF_SHIFT);
+	else if  (fin >= 21250)
+		val = (2 << HDMI_PLL_IDF_SHIFT) |
+		      (40 << HDMI_PLL_LF_SHIFT) |
+		      (3 << HDMI_PLL_ODF_SHIFT);
+	else
+		val = (1 << HDMI_PLL_IDF_SHIFT) |
+		      (40 << HDMI_PLL_LF_SHIFT) |
+		      (4 << HDMI_PLL_ODF_SHIFT);
+
+	lsdc_pipe_wreg32(ldev, LSDC_HDMI0_PHY_PLL_REG, index, val);
+
+	val |= HDMI_PLL_ENABLE;
+
+	lsdc_pipe_wreg32(ldev, LSDC_HDMI0_PHY_PLL_REG, index, val);
+
+	udelay(2);
+
+	drm_dbg(ddev, "Fin of HDMI-%u: %d kHz\n", index, fin);
+
+	/* Wait hdmi phy pll lock */
+	do {
+		val = lsdc_pipe_rreg32(ldev, LSDC_HDMI0_PHY_PLL_REG, index);
+
+		if (val & HDMI_PLL_LOCKED) {
+			drm_dbg(ddev, "Setting HDMI-%u PLL take %d cycles\n",
+				index, count);
+			break;
+		}
+		++count;
+	} while (count < 1000);
+
+	lsdc_pipe_wreg32(ldev, LSDC_HDMI0_PHY_CAL_REG, index, 0x0f000ff0);
+
+	if (count >= 1000)
+		drm_err(ddev, "Setting HDMI-%u PLL failed\n", index);
+}
+
+static void ls7a2000_hdmi_atomic_mode_set(struct drm_encoder *encoder,
+					  struct drm_crtc_state *crtc_state,
+					  struct drm_connector_state *conn_state)
+{
+	struct lsdc_output *output = encoder_to_lsdc_output(encoder);
+	struct lsdc_display_pipe *dispipe = output_to_display_pipe(output);
+	unsigned int index = dispipe->index;
+	struct drm_device *ddev = encoder->dev;
+	struct lsdc_device *ldev = to_lsdc(ddev);
+	struct drm_display_mode *mode = &crtc_state->mode;
+
+	ls7a2000_hdmi_phy_pll_config(ldev, mode->clock, index);
+
+	ls7a2000_hdmi_set_avi_infoframe(encoder, mode);
+
+	drm_dbg(ddev, "%s modeset finished\n", encoder->name);
+}
+
+static const struct drm_encoder_helper_funcs ls7a2000_encoder_helper_funcs = {
+	.atomic_disable = ls7a2000_hdmi_atomic_disable,
+	.atomic_enable = ls7a2000_hdmi_atomic_enable,
+	.atomic_mode_set = ls7a2000_hdmi_atomic_mode_set,
+};
+
+/*
+ * For LS7A2000:
+ *
+ * 1) Most of board export one vga + hdmi output interface.
+ * 2) Yet, Some boards export double hdmi output interface.
+ * 3) Still have boards export three output(2 hdmi + 1 vga).
+ *
+ * So let's hook hdmi helper funcs to all display pipe, don't miss.
+ * writing hdmi register do no harms.
+ */
+int ls7a2000_output_init(struct drm_device *ddev,
+			 struct lsdc_display_pipe *dispipe,
+			 struct i2c_adapter *ddc,
+			 unsigned int pipe)
+{
+	struct lsdc_output *output = &dispipe->output;
+	struct drm_encoder *encoder = &output->encoder;
+	struct drm_connector *connector = &output->connector;
+	int ret;
+
+	ret = drm_encoder_init(ddev, encoder, &ls7a2000_encoder_funcs[pipe],
+			       DRM_MODE_ENCODER_TMDS, "encoder-%u", pipe);
+	if (ret)
+		return ret;
+
+	encoder->possible_crtcs = BIT(pipe);
+
+	drm_encoder_helper_add(encoder, &ls7a2000_encoder_helper_funcs);
+
+	ret = drm_connector_init_with_ddc(ddev, connector,
+					  &ls7a2000_hdmi_connector_funcs[pipe],
+					  DRM_MODE_CONNECTOR_HDMIA, ddc);
+	if (ret)
+		return ret;
+
+	drm_info(ddev, "display pipe-%u has HDMI %s\n", pipe, pipe ? "" : "and/or VGA");
+
+	drm_connector_helper_add(connector, &ls7a2000_connector_helpers);
+
+	drm_connector_attach_encoder(connector, encoder);
+
+	connector->polled = DRM_CONNECTOR_POLL_CONNECT |
+			    DRM_CONNECTOR_POLL_DISCONNECT;
+
+	connector->interlace_allowed = 0;
+	connector->doublescan_allowed = 0;
+
+	return 0;
+}
diff --git a/drivers/gpu/drm/loongson/lsdc_pixpll.c b/drivers/gpu/drm/loongson/lsdc_pixpll.c
new file mode 100644
index 000000000..41131a740
--- /dev/null
+++ b/drivers/gpu/drm/loongson/lsdc_pixpll.c
@@ -0,0 +1,484 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2023 Loongson Technology Corporation Limited
+ */
+
+#include <linux/delay.h>
+
+#include <drm/drm_managed.h>
+#include <drm/drm_print.h>
+
+#include "lsdc_drv.h"
+
+/*
+ * The structure of the pixel PLL registers is evolved with times,
+ * it can be different across different chip also.
+ */
+
+/* size is u64, note that all loongson's cpu is little endian.
+ * This structure is same for ls7a2000, ls7a1000 and ls2k2000.
+ */
+struct lsdc_pixpll_reg {
+	/* Byte 0 ~ Byte 3 */
+	unsigned div_out       : 7;   /*  6 : 0     Output clock divider  */
+	unsigned _reserved_1_  : 14;  /* 20 : 7                           */
+	unsigned loopc         : 9;   /* 29 : 21    Clock multiplier      */
+	unsigned _reserved_2_  : 2;   /* 31 : 30                          */
+
+	/* Byte 4 ~ Byte 7 */
+	unsigned div_ref       : 7;   /* 38 : 32    Input clock divider   */
+	unsigned locked        : 1;   /* 39         PLL locked indicator  */
+	unsigned sel_out       : 1;   /* 40         output clk selector   */
+	unsigned _reserved_3_  : 2;   /* 42 : 41                          */
+	unsigned set_param     : 1;   /* 43         Trigger the update    */
+	unsigned bypass        : 1;   /* 44                               */
+	unsigned powerdown     : 1;   /* 45                               */
+	unsigned _reserved_4_  : 18;  /* 46 : 63    no use                */
+};
+
+union lsdc_pixpll_reg_bitmap {
+	struct lsdc_pixpll_reg bitmap;
+	u32 w[2];
+	u64 d;
+};
+
+struct clk_to_pixpll_parms_lookup_t {
+	unsigned int clock;        /* kHz */
+
+	unsigned short width;
+	unsigned short height;
+	unsigned short vrefresh;
+
+	/* Stores parameters for programming the Hardware PLLs */
+	unsigned short div_out;
+	unsigned short loopc;
+	unsigned short div_ref;
+};
+
+static const struct clk_to_pixpll_parms_lookup_t pixpll_parms_table[] = {
+	{148500, 1920, 1080, 60,  11, 49,  3},   /* 1920x1080@60Hz */
+	{141750, 1920, 1080, 60,  11, 78,  5},   /* 1920x1080@60Hz */
+						 /* 1920x1080@50Hz */
+	{174500, 1920, 1080, 75,  17, 89,  3},   /* 1920x1080@75Hz */
+	{181250, 2560, 1080, 75,  8,  58,  4},   /* 2560x1080@75Hz */
+	{297000, 2560, 1080, 30,  8,  95,  4},   /* 3840x2160@30Hz */
+	{301992, 1920, 1080, 100, 10, 151, 5},   /* 1920x1080@100Hz */
+	{146250, 1680, 1050, 60,  16, 117, 5},   /* 1680x1050@60Hz */
+	{135000, 1280, 1024, 75,  10, 54,  4},   /* 1280x1024@75Hz */
+	{119000, 1680, 1050, 60,  20, 119, 5},   /* 1680x1050@60Hz */
+	{108000, 1600, 900,  60,  15, 81,  5},   /* 1600x900@60Hz  */
+						 /* 1280x1024@60Hz */
+						 /* 1280x960@60Hz */
+						 /* 1152x864@75Hz */
+
+	{106500, 1440, 900,  60,  19, 81,  4},   /* 1440x900@60Hz */
+	{88750,  1440, 900,  60,  16, 71,  5},   /* 1440x900@60Hz */
+	{83500,  1280, 800,  60,  17, 71,  5},   /* 1280x800@60Hz */
+	{71000,  1280, 800,  60,  20, 71,  5},   /* 1280x800@60Hz */
+
+	{74250,  1280, 720,  60,  22, 49,  3},   /* 1280x720@60Hz */
+						 /* 1280x720@50Hz */
+
+	{78750,  1024, 768,  75,  16, 63,  5},   /* 1024x768@75Hz */
+	{75000,  1024, 768,  70,  29, 87,  4},   /* 1024x768@70Hz */
+	{65000,  1024, 768,  60,  20, 39,  3},   /* 1024x768@60Hz */
+
+	{51200,  1024, 600,  60,  25, 64,  5},   /* 1024x600@60Hz */
+
+	{57284,  832,  624,  75,  24, 55,  4},   /* 832x624@75Hz */
+	{49500,  800,  600,  75,  40, 99,  5},   /* 800x600@75Hz */
+	{50000,  800,  600,  72,  44, 88,  4},   /* 800x600@72Hz */
+	{40000,  800,  600,  60,  30, 36,  3},   /* 800x600@60Hz */
+	{36000,  800,  600,  56,  50, 72,  4},   /* 800x600@56Hz */
+	{31500,  640,  480,  75,  40, 63,  5},   /* 640x480@75Hz */
+						 /* 640x480@73Hz */
+
+	{30240,  640,  480,  67,  62, 75,  4},   /* 640x480@67Hz */
+	{27000,  720,  576,  50,  50, 54,  4},   /* 720x576@60Hz */
+	{25175,  640,  480,  60,  85, 107, 5},   /* 640x480@60Hz */
+	{25200,  640,  480,  60,  50, 63,  5},   /* 640x480@60Hz */
+						 /* 720x480@60Hz */
+};
+
+static void lsdc_pixel_pll_free(struct drm_device *ddev, void *data)
+{
+	struct lsdc_pixpll *this = (struct lsdc_pixpll *)data;
+
+	iounmap(this->mmio);
+
+	kfree(this->priv);
+
+	drm_dbg(ddev, "pixpll private data freed\n");
+}
+
+/*
+ * ioremap the device dependent PLL registers
+ *
+ * @this: point to the object where this function is called from
+ */
+static int lsdc_pixel_pll_setup(struct lsdc_pixpll * const this)
+{
+	struct lsdc_pixpll_parms *pparms;
+
+	this->mmio = ioremap(this->reg_base, this->reg_size);
+	if (!this->mmio)
+		return -ENOMEM;
+
+	pparms = kzalloc_obj(*pparms);
+	if (!pparms) {
+		iounmap(this->mmio);
+		return -ENOMEM;
+	}
+
+	pparms->ref_clock = LSDC_PLL_REF_CLK_KHZ;
+
+	this->priv = pparms;
+
+	return drmm_add_action_or_reset(this->ddev, lsdc_pixel_pll_free, this);
+}
+
+/*
+ * Find a set of pll parameters from a static local table which avoid
+ * computing the pll parameter eachtime a modeset is triggered.
+ *
+ * @this: point to the object where this function is called from
+ * @clock: the desired output pixel clock, the unit is kHz
+ * @pout: point to where the parameters to store if found
+ *
+ * Return 0 if success, return -1 if not found.
+ */
+static int lsdc_pixpll_find(struct lsdc_pixpll * const this,
+			    unsigned int clock,
+			    struct lsdc_pixpll_parms *pout)
+{
+	unsigned int num = ARRAY_SIZE(pixpll_parms_table);
+	const struct clk_to_pixpll_parms_lookup_t *pt;
+	unsigned int i;
+
+	for (i = 0; i < num; ++i) {
+		pt = &pixpll_parms_table[i];
+
+		if (clock == pt->clock) {
+			pout->div_ref = pt->div_ref;
+			pout->loopc   = pt->loopc;
+			pout->div_out = pt->div_out;
+
+			return 0;
+		}
+	}
+
+	drm_dbg_kms(this->ddev, "pixel clock %u: miss\n", clock);
+
+	return -1;
+}
+
+/*
+ * Find a set of pll parameters which have minimal difference with the
+ * desired pixel clock frequency. It does that by computing all of the
+ * possible combination. Compute the diff and find the combination with
+ * minimal diff.
+ *
+ * clock_out = refclk / div_ref * loopc / div_out
+ *
+ * refclk is determined by the oscillator mounted on motherboard(100MHz
+ * in almost all board)
+ *
+ * @this: point to the object from where this function is called
+ * @clock: the desired output pixel clock, the unit is kHz
+ * @pout: point to the out struct of lsdc_pixpll_parms
+ *
+ * Return 0 if a set of parameter is found, otherwise return the error
+ * between clock_kHz we wanted and the most closest candidate with it.
+ */
+static int lsdc_pixel_pll_compute(struct lsdc_pixpll * const this,
+				  unsigned int clock,
+				  struct lsdc_pixpll_parms *pout)
+{
+	struct lsdc_pixpll_parms *pparms = this->priv;
+	unsigned int refclk = pparms->ref_clock;
+	const unsigned int tolerance = 1000;
+	unsigned int min = tolerance;
+	unsigned int div_out, loopc, div_ref;
+	unsigned int computed;
+
+	if (!lsdc_pixpll_find(this, clock, pout))
+		return 0;
+
+	for (div_out = 6; div_out < 64; div_out++) {
+		for (div_ref = 3; div_ref < 6; div_ref++) {
+			for (loopc = 6; loopc < 161; loopc++) {
+				unsigned int diff = 0;
+
+				if (loopc < 12 * div_ref)
+					continue;
+				if (loopc > 32 * div_ref)
+					continue;
+
+				computed = refclk / div_ref * loopc / div_out;
+
+				if (clock >= computed)
+					diff = clock - computed;
+				else
+					diff = computed - clock;
+
+				if (diff < min) {
+					min = diff;
+					pparms->div_ref = div_ref;
+					pparms->div_out = div_out;
+					pparms->loopc = loopc;
+
+					if (diff == 0) {
+						*pout = *pparms;
+						return 0;
+					}
+				}
+			}
+		}
+	}
+
+	/* still acceptable */
+	if (min < tolerance) {
+		*pout = *pparms;
+		return 0;
+	}
+
+	drm_dbg(this->ddev, "can't find suitable params for %u khz\n", clock);
+
+	return min;
+}
+
+/* Pixel pll hardware related ops, per display pipe */
+
+static void __pixpll_rreg(struct lsdc_pixpll *this,
+			  union lsdc_pixpll_reg_bitmap *dst)
+{
+#if defined(CONFIG_64BIT)
+	dst->d = readq(this->mmio);
+#else
+	dst->w[0] = readl(this->mmio);
+	dst->w[1] = readl(this->mmio + 4);
+#endif
+}
+
+static void __pixpll_wreg(struct lsdc_pixpll *this,
+			  union lsdc_pixpll_reg_bitmap *src)
+{
+#if defined(CONFIG_64BIT)
+	writeq(src->d, this->mmio);
+#else
+	writel(src->w[0], this->mmio);
+	writel(src->w[1], this->mmio + 4);
+#endif
+}
+
+static void __pixpll_ops_powerup(struct lsdc_pixpll * const this)
+{
+	union lsdc_pixpll_reg_bitmap pixpll_reg;
+
+	__pixpll_rreg(this, &pixpll_reg);
+
+	pixpll_reg.bitmap.powerdown = 0;
+
+	__pixpll_wreg(this, &pixpll_reg);
+}
+
+static void __pixpll_ops_powerdown(struct lsdc_pixpll * const this)
+{
+	union lsdc_pixpll_reg_bitmap pixpll_reg;
+
+	__pixpll_rreg(this, &pixpll_reg);
+
+	pixpll_reg.bitmap.powerdown = 1;
+
+	__pixpll_wreg(this, &pixpll_reg);
+}
+
+static void __pixpll_ops_on(struct lsdc_pixpll * const this)
+{
+	union lsdc_pixpll_reg_bitmap pixpll_reg;
+
+	__pixpll_rreg(this, &pixpll_reg);
+
+	pixpll_reg.bitmap.sel_out = 1;
+
+	__pixpll_wreg(this, &pixpll_reg);
+}
+
+static void __pixpll_ops_off(struct lsdc_pixpll * const this)
+{
+	union lsdc_pixpll_reg_bitmap pixpll_reg;
+
+	__pixpll_rreg(this, &pixpll_reg);
+
+	pixpll_reg.bitmap.sel_out = 0;
+
+	__pixpll_wreg(this, &pixpll_reg);
+}
+
+static void __pixpll_ops_bypass(struct lsdc_pixpll * const this)
+{
+	union lsdc_pixpll_reg_bitmap pixpll_reg;
+
+	__pixpll_rreg(this, &pixpll_reg);
+
+	pixpll_reg.bitmap.bypass = 1;
+
+	__pixpll_wreg(this, &pixpll_reg);
+}
+
+static void __pixpll_ops_unbypass(struct lsdc_pixpll * const this)
+{
+	union lsdc_pixpll_reg_bitmap pixpll_reg;
+
+	__pixpll_rreg(this, &pixpll_reg);
+
+	pixpll_reg.bitmap.bypass = 0;
+
+	__pixpll_wreg(this, &pixpll_reg);
+}
+
+static void __pixpll_ops_untoggle_param(struct lsdc_pixpll * const this)
+{
+	union lsdc_pixpll_reg_bitmap pixpll_reg;
+
+	__pixpll_rreg(this, &pixpll_reg);
+
+	pixpll_reg.bitmap.set_param = 0;
+
+	__pixpll_wreg(this, &pixpll_reg);
+}
+
+static void __pixpll_ops_set_param(struct lsdc_pixpll * const this,
+				   struct lsdc_pixpll_parms const *p)
+{
+	union lsdc_pixpll_reg_bitmap pixpll_reg;
+
+	__pixpll_rreg(this, &pixpll_reg);
+
+	pixpll_reg.bitmap.div_ref = p->div_ref;
+	pixpll_reg.bitmap.loopc = p->loopc;
+	pixpll_reg.bitmap.div_out = p->div_out;
+
+	__pixpll_wreg(this, &pixpll_reg);
+}
+
+static void __pixpll_ops_toggle_param(struct lsdc_pixpll * const this)
+{
+	union lsdc_pixpll_reg_bitmap pixpll_reg;
+
+	__pixpll_rreg(this, &pixpll_reg);
+
+	pixpll_reg.bitmap.set_param = 1;
+
+	__pixpll_wreg(this, &pixpll_reg);
+}
+
+static void __pixpll_ops_wait_locked(struct lsdc_pixpll * const this)
+{
+	union lsdc_pixpll_reg_bitmap pixpll_reg;
+	unsigned int counter = 0;
+
+	do {
+		__pixpll_rreg(this, &pixpll_reg);
+
+		if (pixpll_reg.bitmap.locked)
+			break;
+
+		++counter;
+	} while (counter < 2000);
+
+	drm_dbg(this->ddev, "%u loop waited\n", counter);
+}
+
+/*
+ * Update the PLL parameters to the PLL hardware
+ *
+ * @this: point to the object from which this function is called
+ * @pin: point to the struct of lsdc_pixpll_parms passed in
+ *
+ * return 0 if successful.
+ */
+static int lsdc_pixpll_update(struct lsdc_pixpll * const this,
+			      struct lsdc_pixpll_parms const *pin)
+{
+	__pixpll_ops_bypass(this);
+
+	__pixpll_ops_off(this);
+
+	__pixpll_ops_powerdown(this);
+
+	__pixpll_ops_toggle_param(this);
+
+	__pixpll_ops_set_param(this, pin);
+
+	__pixpll_ops_untoggle_param(this);
+
+	__pixpll_ops_powerup(this);
+
+	udelay(2);
+
+	__pixpll_ops_wait_locked(this);
+
+	__pixpll_ops_on(this);
+
+	__pixpll_ops_unbypass(this);
+
+	return 0;
+}
+
+static unsigned int lsdc_pixpll_get_freq(struct lsdc_pixpll * const this)
+{
+	struct lsdc_pixpll_parms *ppar = this->priv;
+	union lsdc_pixpll_reg_bitmap pix_pll_reg;
+	unsigned int freq;
+
+	__pixpll_rreg(this, &pix_pll_reg);
+
+	ppar->div_ref = pix_pll_reg.bitmap.div_ref;
+	ppar->loopc = pix_pll_reg.bitmap.loopc;
+	ppar->div_out = pix_pll_reg.bitmap.div_out;
+
+	freq = ppar->ref_clock / ppar->div_ref * ppar->loopc / ppar->div_out;
+
+	return freq;
+}
+
+static void lsdc_pixpll_print(struct lsdc_pixpll * const this,
+			      struct drm_printer *p)
+{
+	struct lsdc_pixpll_parms *parms = this->priv;
+
+	drm_printf(p, "div_ref: %u, loopc: %u, div_out: %u\n",
+		   parms->div_ref, parms->loopc, parms->div_out);
+}
+
+/*
+ * LS7A1000, LS7A2000 and ls2k2000's pixel pll setting register is same,
+ * we take this as default, create a new instance if a different model is
+ * introduced.
+ */
+static const struct lsdc_pixpll_funcs __pixpll_default_funcs = {
+	.setup = lsdc_pixel_pll_setup,
+	.compute = lsdc_pixel_pll_compute,
+	.update = lsdc_pixpll_update,
+	.get_rate = lsdc_pixpll_get_freq,
+	.print = lsdc_pixpll_print,
+};
+
+/* pixel pll initialization */
+
+int lsdc_pixpll_init(struct lsdc_pixpll * const this,
+		     struct drm_device *ddev,
+		     unsigned int index)
+{
+	struct lsdc_device *ldev = to_lsdc(ddev);
+	const struct lsdc_desc *descp = ldev->descp;
+	const struct loongson_gfx_desc *gfx = to_loongson_gfx(descp);
+
+	this->ddev = ddev;
+	this->reg_size = 8;
+	this->reg_base = gfx->conf_reg_base + gfx->pixpll[index].reg_offset;
+	this->funcs = &__pixpll_default_funcs;
+
+	return this->funcs->setup(this);
+}
diff --git a/drivers/gpu/drm/loongson/lsdc_pixpll.h b/drivers/gpu/drm/loongson/lsdc_pixpll.h
new file mode 100644
index 000000000..ec3486d90
--- /dev/null
+++ b/drivers/gpu/drm/loongson/lsdc_pixpll.h
@@ -0,0 +1,86 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2023 Loongson Technology Corporation Limited
+ */
+
+#ifndef __LSDC_PIXPLL_H__
+#define __LSDC_PIXPLL_H__
+
+#include <drm/drm_device.h>
+
+/*
+ * Loongson Pixel PLL hardware structure
+ *
+ * refclk: reference frequency, 100 MHz from external oscillator
+ * outclk: output frequency desired.
+ *
+ *
+ *               L1       Fref                      Fvco     L2
+ * refclk   +-----------+      +------------------+      +---------+   outclk
+ * ---+---> | Prescaler | ---> | Clock Multiplier | ---> | divider | -------->
+ *    |     +-----------+      +------------------+      +---------+     ^
+ *    |           ^                      ^                    ^          |
+ *    |           |                      |                    |          |
+ *    |           |                      |                    |          |
+ *    |        div_ref                 loopc               div_out       |
+ *    |                                                                  |
+ *    +---- bypass (bypass above software configurable clock if set) ----+
+ *
+ *   outclk = refclk / div_ref * loopc / div_out;
+ *
+ *   sel_out: PLL clock output selector(enable).
+ *
+ *   If sel_out == 1, then enable output clock (turn On);
+ *   If sel_out == 0, then disable output clock (turn Off);
+ *
+ * PLL working requirements:
+ *
+ *  1) 20 MHz <= refclk / div_ref <= 40Mhz
+ *  2) 1.2 GHz <= refclk /div_out * loopc <= 3.2 Ghz
+ */
+
+struct lsdc_pixpll_parms {
+	unsigned int ref_clock;
+	unsigned int div_ref;
+	unsigned int loopc;
+	unsigned int div_out;
+};
+
+struct lsdc_pixpll;
+
+struct lsdc_pixpll_funcs {
+	int (*setup)(struct lsdc_pixpll * const this);
+
+	int (*compute)(struct lsdc_pixpll * const this,
+		       unsigned int clock,
+		       struct lsdc_pixpll_parms *pout);
+
+	int (*update)(struct lsdc_pixpll * const this,
+		      struct lsdc_pixpll_parms const *pin);
+
+	unsigned int (*get_rate)(struct lsdc_pixpll * const this);
+
+	void (*print)(struct lsdc_pixpll * const this,
+		      struct drm_printer *printer);
+};
+
+struct lsdc_pixpll {
+	const struct lsdc_pixpll_funcs *funcs;
+
+	struct drm_device *ddev;
+
+	/* PLL register offset */
+	u32 reg_base;
+	/* PLL register size in bytes */
+	u32 reg_size;
+
+	void __iomem *mmio;
+
+	struct lsdc_pixpll_parms *priv;
+};
+
+int lsdc_pixpll_init(struct lsdc_pixpll * const this,
+		     struct drm_device *ddev,
+		     unsigned int index);
+
+#endif
diff --git a/drivers/gpu/drm/loongson/lsdc_plane.c b/drivers/gpu/drm/loongson/lsdc_plane.c
new file mode 100644
index 000000000..bea422157
--- /dev/null
+++ b/drivers/gpu/drm/loongson/lsdc_plane.c
@@ -0,0 +1,794 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2023 Loongson Technology Corporation Limited
+ */
+
+#include <linux/delay.h>
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_framebuffer.h>
+#include <drm/drm_gem_atomic_helper.h>
+#include <drm/drm_print.h>
+
+#include "lsdc_drv.h"
+#include "lsdc_regs.h"
+#include "lsdc_ttm.h"
+
+static const u32 lsdc_primary_formats[] = {
+	DRM_FORMAT_XRGB8888,
+};
+
+static const u32 lsdc_cursor_formats[] = {
+	DRM_FORMAT_ARGB8888,
+};
+
+static const u64 lsdc_fb_format_modifiers[] = {
+	DRM_FORMAT_MOD_LINEAR,
+	DRM_FORMAT_MOD_INVALID
+};
+
+static unsigned int lsdc_get_fb_offset(struct drm_framebuffer *fb,
+				       struct drm_plane_state *state)
+{
+	unsigned int offset = fb->offsets[0];
+
+	offset += fb->format->cpp[0] * (state->src_x >> 16);
+	offset += fb->pitches[0] * (state->src_y >> 16);
+
+	return offset;
+}
+
+static u64 lsdc_fb_base_addr(struct drm_framebuffer *fb)
+{
+	struct lsdc_device *ldev = to_lsdc(fb->dev);
+	struct lsdc_bo *lbo = gem_to_lsdc_bo(fb->obj[0]);
+
+	return lsdc_bo_gpu_offset(lbo) + ldev->vram_base;
+}
+
+static int lsdc_primary_atomic_check(struct drm_plane *plane,
+				     struct drm_atomic_commit *state)
+{
+	struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state, plane);
+	struct drm_crtc *crtc = new_plane_state->crtc;
+	struct drm_crtc_state *new_crtc_state;
+
+	if (!crtc)
+		return 0;
+
+	new_crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
+
+	return drm_atomic_helper_check_plane_state(new_plane_state,
+						   new_crtc_state,
+						   DRM_PLANE_NO_SCALING,
+						   DRM_PLANE_NO_SCALING,
+						   false, true);
+}
+
+static void lsdc_primary_atomic_update(struct drm_plane *plane,
+				       struct drm_atomic_commit *state)
+{
+	struct lsdc_primary *primary = to_lsdc_primary(plane);
+	const struct lsdc_primary_plane_ops *ops = primary->ops;
+	struct drm_plane_state *old_plane_state = drm_atomic_get_old_plane_state(state, plane);
+	struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state, plane);
+	struct drm_framebuffer *new_fb = new_plane_state->fb;
+	struct drm_framebuffer *old_fb = old_plane_state->fb;
+	u64 fb_addr = lsdc_fb_base_addr(new_fb);
+
+	fb_addr += lsdc_get_fb_offset(new_fb, new_plane_state);
+
+	ops->update_fb_addr(primary, fb_addr);
+	ops->update_fb_stride(primary, new_fb->pitches[0]);
+
+	if (!old_fb || old_fb->format != new_fb->format)
+		ops->update_fb_format(primary, new_fb->format);
+}
+
+static void lsdc_primary_atomic_disable(struct drm_plane *plane,
+					struct drm_atomic_commit *state)
+{
+	/*
+	 * Do nothing, just prevent call into atomic_update().
+	 * Writing the format as LSDC_PF_NONE can disable the primary,
+	 * But it seems not necessary...
+	 */
+	drm_dbg(plane->dev, "%s disabled\n", plane->name);
+}
+
+static int lsdc_plane_prepare_fb(struct drm_plane *plane,
+				 struct drm_plane_state *new_state)
+{
+	struct drm_framebuffer *fb = new_state->fb;
+	struct lsdc_bo *lbo;
+	u64 gpu_vaddr;
+	int ret;
+
+	if (!fb)
+		return 0;
+
+	lbo = gem_to_lsdc_bo(fb->obj[0]);
+
+	ret = lsdc_bo_reserve(lbo);
+	if (unlikely(ret)) {
+		drm_err(plane->dev, "bo %p reserve failed\n", lbo);
+		return ret;
+	}
+
+	ret = lsdc_bo_pin(lbo, LSDC_GEM_DOMAIN_VRAM, &gpu_vaddr);
+
+	lsdc_bo_unreserve(lbo);
+
+	if (unlikely(ret)) {
+		drm_err(plane->dev, "bo %p pin failed\n", lbo);
+		return ret;
+	}
+
+	lsdc_bo_ref(lbo);
+
+	if (plane->type != DRM_PLANE_TYPE_CURSOR)
+		drm_dbg(plane->dev,
+			"%s[%p] pin at 0x%llx, bo size: %zu\n",
+			plane->name, lbo, gpu_vaddr, lsdc_bo_size(lbo));
+
+	return drm_gem_plane_helper_prepare_fb(plane, new_state);
+}
+
+static void lsdc_plane_cleanup_fb(struct drm_plane *plane,
+				  struct drm_plane_state *old_state)
+{
+	struct drm_framebuffer *fb = old_state->fb;
+	struct lsdc_bo *lbo;
+	int ret;
+
+	if (!fb)
+		return;
+
+	lbo = gem_to_lsdc_bo(fb->obj[0]);
+
+	ret = lsdc_bo_reserve(lbo);
+	if (unlikely(ret)) {
+		drm_err(plane->dev, "%p reserve failed\n", lbo);
+		return;
+	}
+
+	lsdc_bo_unpin(lbo);
+
+	lsdc_bo_unreserve(lbo);
+
+	lsdc_bo_unref(lbo);
+
+	if (plane->type != DRM_PLANE_TYPE_CURSOR)
+		drm_dbg(plane->dev, "%s unpin\n", plane->name);
+}
+
+static const struct drm_plane_helper_funcs lsdc_primary_helper_funcs = {
+	.prepare_fb = lsdc_plane_prepare_fb,
+	.cleanup_fb = lsdc_plane_cleanup_fb,
+	.atomic_check = lsdc_primary_atomic_check,
+	.atomic_update = lsdc_primary_atomic_update,
+	.atomic_disable = lsdc_primary_atomic_disable,
+};
+
+static int lsdc_cursor_plane_atomic_async_check(struct drm_plane *plane,
+						struct drm_atomic_commit *state,
+						bool flip)
+{
+	struct drm_plane_state *new_state;
+	struct drm_crtc_state *crtc_state;
+
+	new_state = drm_atomic_get_new_plane_state(state, plane);
+
+	if (!plane->state || !plane->state->fb) {
+		drm_dbg(plane->dev, "%s: state is NULL\n", plane->name);
+		return -EINVAL;
+	}
+
+	if (new_state->crtc_w != new_state->crtc_h) {
+		drm_dbg(plane->dev, "unsupported cursor size: %ux%u\n",
+			new_state->crtc_w, new_state->crtc_h);
+		return -EINVAL;
+	}
+
+	if (new_state->crtc_w != 64 && new_state->crtc_w != 32) {
+		drm_dbg(plane->dev, "unsupported cursor size: %ux%u\n",
+			new_state->crtc_w, new_state->crtc_h);
+		return -EINVAL;
+	}
+
+	crtc_state = drm_atomic_get_new_crtc_state(state, new_state->crtc);
+	if (!crtc_state->active)
+		return -EINVAL;
+
+	if (plane->state->crtc != new_state->crtc ||
+	    plane->state->src_w != new_state->src_w ||
+	    plane->state->src_h != new_state->src_h ||
+	    plane->state->crtc_w != new_state->crtc_w ||
+	    plane->state->crtc_h != new_state->crtc_h)
+		return -EINVAL;
+
+	if (new_state->visible != plane->state->visible)
+		return -EINVAL;
+
+	return drm_atomic_helper_check_plane_state(plane->state,
+						   crtc_state,
+						   DRM_PLANE_NO_SCALING,
+						   DRM_PLANE_NO_SCALING,
+						   true, true);
+}
+
+static void lsdc_cursor_plane_atomic_async_update(struct drm_plane *plane,
+						  struct drm_atomic_commit *state)
+{
+	struct lsdc_cursor *cursor = to_lsdc_cursor(plane);
+	const struct lsdc_cursor_plane_ops *ops = cursor->ops;
+	struct drm_framebuffer *old_fb = plane->state->fb;
+	struct drm_framebuffer *new_fb;
+	struct drm_plane_state *new_state;
+
+	new_state = drm_atomic_get_new_plane_state(state, plane);
+
+	new_fb = plane->state->fb;
+
+	plane->state->crtc_x = new_state->crtc_x;
+	plane->state->crtc_y = new_state->crtc_y;
+	plane->state->crtc_h = new_state->crtc_h;
+	plane->state->crtc_w = new_state->crtc_w;
+	plane->state->src_x = new_state->src_x;
+	plane->state->src_y = new_state->src_y;
+	plane->state->src_h = new_state->src_h;
+	plane->state->src_w = new_state->src_w;
+	swap(plane->state->fb, new_state->fb);
+
+	if (new_state->visible) {
+		enum lsdc_cursor_size cursor_size;
+
+		switch (new_state->crtc_w) {
+		case 64:
+			cursor_size = CURSOR_SIZE_64X64;
+			break;
+		case 32:
+			cursor_size = CURSOR_SIZE_32X32;
+			break;
+		default:
+			cursor_size = CURSOR_SIZE_32X32;
+			break;
+		}
+
+		ops->update_position(cursor, new_state->crtc_x, new_state->crtc_y);
+
+		ops->update_cfg(cursor, cursor_size, CURSOR_FORMAT_ARGB8888);
+
+		if (!old_fb || old_fb != new_fb)
+			ops->update_bo_addr(cursor, lsdc_fb_base_addr(new_fb));
+	}
+}
+
+/* ls7a1000 cursor plane helpers */
+
+static int ls7a1000_cursor_plane_atomic_check(struct drm_plane *plane,
+					      struct drm_atomic_commit *state)
+{
+	struct drm_plane_state *new_plane_state;
+	struct drm_crtc_state *new_crtc_state;
+	struct drm_crtc *crtc;
+
+	new_plane_state = drm_atomic_get_new_plane_state(state, plane);
+
+	crtc = new_plane_state->crtc;
+	if (!crtc) {
+		drm_dbg(plane->dev, "%s is not bind to a crtc\n", plane->name);
+		return 0;
+	}
+
+	if (new_plane_state->crtc_w != 32 || new_plane_state->crtc_h != 32) {
+		drm_dbg(plane->dev, "unsupported cursor size: %ux%u\n",
+			new_plane_state->crtc_w, new_plane_state->crtc_h);
+		return -EINVAL;
+	}
+
+	new_crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
+
+	return drm_atomic_helper_check_plane_state(new_plane_state,
+						   new_crtc_state,
+						   DRM_PLANE_NO_SCALING,
+						   DRM_PLANE_NO_SCALING,
+						   true, true);
+}
+
+static void ls7a1000_cursor_plane_atomic_update(struct drm_plane *plane,
+						struct drm_atomic_commit *state)
+{
+	struct lsdc_cursor *cursor = to_lsdc_cursor(plane);
+	struct drm_plane_state *old_plane_state = drm_atomic_get_old_plane_state(state, plane);
+	struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state, plane);
+	struct drm_framebuffer *new_fb = new_plane_state->fb;
+	struct drm_framebuffer *old_fb = old_plane_state->fb;
+	const struct lsdc_cursor_plane_ops *ops = cursor->ops;
+	u64 addr = lsdc_fb_base_addr(new_fb);
+
+	if (!new_plane_state->visible)
+		return;
+
+	ops->update_position(cursor, new_plane_state->crtc_x, new_plane_state->crtc_y);
+
+	if (!old_fb || old_fb != new_fb)
+		ops->update_bo_addr(cursor, addr);
+
+	ops->update_cfg(cursor, CURSOR_SIZE_32X32, CURSOR_FORMAT_ARGB8888);
+}
+
+static void ls7a1000_cursor_plane_atomic_disable(struct drm_plane *plane,
+						 struct drm_atomic_commit *state)
+{
+	struct lsdc_cursor *cursor = to_lsdc_cursor(plane);
+	const struct lsdc_cursor_plane_ops *ops = cursor->ops;
+
+	ops->update_cfg(cursor, CURSOR_SIZE_32X32, CURSOR_FORMAT_DISABLE);
+}
+
+static const struct drm_plane_helper_funcs ls7a1000_cursor_plane_helper_funcs = {
+	.prepare_fb = lsdc_plane_prepare_fb,
+	.cleanup_fb = lsdc_plane_cleanup_fb,
+	.atomic_check = ls7a1000_cursor_plane_atomic_check,
+	.atomic_update = ls7a1000_cursor_plane_atomic_update,
+	.atomic_disable = ls7a1000_cursor_plane_atomic_disable,
+	.atomic_async_check = lsdc_cursor_plane_atomic_async_check,
+	.atomic_async_update = lsdc_cursor_plane_atomic_async_update,
+};
+
+/* ls7a2000 cursor plane helpers */
+
+static int ls7a2000_cursor_plane_atomic_check(struct drm_plane *plane,
+					      struct drm_atomic_commit *state)
+{
+	struct drm_plane_state *new_plane_state;
+	struct drm_crtc_state *new_crtc_state;
+	struct drm_crtc *crtc;
+
+	new_plane_state = drm_atomic_get_new_plane_state(state, plane);
+
+	crtc = new_plane_state->crtc;
+	if (!crtc) {
+		drm_dbg(plane->dev, "%s is not bind to a crtc\n", plane->name);
+		return 0;
+	}
+
+	if (new_plane_state->crtc_w != new_plane_state->crtc_h) {
+		drm_dbg(plane->dev, "unsupported cursor size: %ux%u\n",
+			new_plane_state->crtc_w, new_plane_state->crtc_h);
+		return -EINVAL;
+	}
+
+	if (new_plane_state->crtc_w != 64 && new_plane_state->crtc_w != 32) {
+		drm_dbg(plane->dev, "unsupported cursor size: %ux%u\n",
+			new_plane_state->crtc_w, new_plane_state->crtc_h);
+		return -EINVAL;
+	}
+
+	new_crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
+
+	return drm_atomic_helper_check_plane_state(new_plane_state,
+						   new_crtc_state,
+						   DRM_PLANE_NO_SCALING,
+						   DRM_PLANE_NO_SCALING,
+						   true, true);
+}
+
+/* Update the format, size and location of the cursor */
+
+static void ls7a2000_cursor_plane_atomic_update(struct drm_plane *plane,
+						struct drm_atomic_commit *state)
+{
+	struct lsdc_cursor *cursor = to_lsdc_cursor(plane);
+	struct drm_plane_state *old_plane_state = drm_atomic_get_old_plane_state(state, plane);
+	struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state, plane);
+	struct drm_framebuffer *new_fb = new_plane_state->fb;
+	struct drm_framebuffer *old_fb = old_plane_state->fb;
+	const struct lsdc_cursor_plane_ops *ops = cursor->ops;
+	enum lsdc_cursor_size cursor_size;
+
+	if (!new_plane_state->visible)
+		return;
+
+	ops->update_position(cursor, new_plane_state->crtc_x, new_plane_state->crtc_y);
+
+	if (!old_fb || new_fb != old_fb) {
+		u64 addr = lsdc_fb_base_addr(new_fb);
+
+		ops->update_bo_addr(cursor, addr);
+	}
+
+	switch (new_plane_state->crtc_w) {
+	case 64:
+		cursor_size = CURSOR_SIZE_64X64;
+		break;
+	case 32:
+		cursor_size = CURSOR_SIZE_32X32;
+		break;
+	default:
+		cursor_size = CURSOR_SIZE_64X64;
+		break;
+	}
+
+	ops->update_cfg(cursor, cursor_size, CURSOR_FORMAT_ARGB8888);
+}
+
+static void ls7a2000_cursor_plane_atomic_disable(struct drm_plane *plane,
+						 struct drm_atomic_commit *state)
+{
+	struct lsdc_cursor *cursor = to_lsdc_cursor(plane);
+	const struct lsdc_cursor_plane_ops *hw_ops = cursor->ops;
+
+	hw_ops->update_cfg(cursor, CURSOR_SIZE_64X64, CURSOR_FORMAT_DISABLE);
+}
+
+static const struct drm_plane_helper_funcs ls7a2000_cursor_plane_helper_funcs = {
+	.prepare_fb = lsdc_plane_prepare_fb,
+	.cleanup_fb = lsdc_plane_cleanup_fb,
+	.atomic_check = ls7a2000_cursor_plane_atomic_check,
+	.atomic_update = ls7a2000_cursor_plane_atomic_update,
+	.atomic_disable = ls7a2000_cursor_plane_atomic_disable,
+	.atomic_async_check = lsdc_cursor_plane_atomic_async_check,
+	.atomic_async_update = lsdc_cursor_plane_atomic_async_update,
+};
+
+static void lsdc_plane_atomic_print_state(struct drm_printer *p,
+					  const struct drm_plane_state *state)
+{
+	struct drm_framebuffer *fb = state->fb;
+	u64 addr;
+
+	if (!fb)
+		return;
+
+	addr = lsdc_fb_base_addr(fb);
+
+	drm_printf(p, "\tdma addr=%llx\n", addr);
+}
+
+static const struct drm_plane_funcs lsdc_plane_funcs = {
+	.update_plane = drm_atomic_helper_update_plane,
+	.disable_plane = drm_atomic_helper_disable_plane,
+	.destroy = drm_plane_cleanup,
+	.reset = drm_atomic_helper_plane_reset,
+	.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
+	.atomic_print_state = lsdc_plane_atomic_print_state,
+};
+
+/* Primary plane 0 hardware related ops  */
+
+static void lsdc_primary0_update_fb_addr(struct lsdc_primary *primary, u64 addr)
+{
+	struct lsdc_device *ldev = primary->ldev;
+	u32 status;
+	u32 lo, hi;
+
+	/* 40-bit width physical address bus */
+	lo = addr & 0xFFFFFFFF;
+	hi = (addr >> 32) & 0xFF;
+
+	status = lsdc_rreg32(ldev, LSDC_CRTC0_CFG_REG);
+	if (status & FB_REG_IN_USING) {
+		lsdc_wreg32(ldev, LSDC_CRTC0_FB1_ADDR_LO_REG, lo);
+		lsdc_wreg32(ldev, LSDC_CRTC0_FB1_ADDR_HI_REG, hi);
+	} else {
+		lsdc_wreg32(ldev, LSDC_CRTC0_FB0_ADDR_LO_REG, lo);
+		lsdc_wreg32(ldev, LSDC_CRTC0_FB0_ADDR_HI_REG, hi);
+	}
+}
+
+static void lsdc_primary0_update_fb_stride(struct lsdc_primary *primary, u32 stride)
+{
+	struct lsdc_device *ldev = primary->ldev;
+
+	lsdc_wreg32(ldev, LSDC_CRTC0_STRIDE_REG, stride);
+}
+
+static void lsdc_primary0_update_fb_format(struct lsdc_primary *primary,
+					   const struct drm_format_info *format)
+{
+	struct lsdc_device *ldev = primary->ldev;
+	u32 status;
+
+	status = lsdc_rreg32(ldev, LSDC_CRTC0_CFG_REG);
+
+	/*
+	 * TODO: add RGB565 support, only support XRBG8888 at present
+	 */
+	status &= ~CFG_PIX_FMT_MASK;
+	status |= LSDC_PF_XRGB8888;
+
+	lsdc_wreg32(ldev, LSDC_CRTC0_CFG_REG, status);
+}
+
+/* Primary plane 1 hardware related ops */
+
+static void lsdc_primary1_update_fb_addr(struct lsdc_primary *primary, u64 addr)
+{
+	struct lsdc_device *ldev = primary->ldev;
+	u32 status;
+	u32 lo, hi;
+
+	/* 40-bit width physical address bus */
+	lo = addr & 0xFFFFFFFF;
+	hi = (addr >> 32) & 0xFF;
+
+	status = lsdc_rreg32(ldev, LSDC_CRTC1_CFG_REG);
+	if (status & FB_REG_IN_USING) {
+		lsdc_wreg32(ldev, LSDC_CRTC1_FB1_ADDR_LO_REG, lo);
+		lsdc_wreg32(ldev, LSDC_CRTC1_FB1_ADDR_HI_REG, hi);
+	} else {
+		lsdc_wreg32(ldev, LSDC_CRTC1_FB0_ADDR_LO_REG, lo);
+		lsdc_wreg32(ldev, LSDC_CRTC1_FB0_ADDR_HI_REG, hi);
+	}
+}
+
+static void lsdc_primary1_update_fb_stride(struct lsdc_primary *primary, u32 stride)
+{
+	struct lsdc_device *ldev = primary->ldev;
+
+	lsdc_wreg32(ldev, LSDC_CRTC1_STRIDE_REG, stride);
+}
+
+static void lsdc_primary1_update_fb_format(struct lsdc_primary *primary,
+					   const struct drm_format_info *format)
+{
+	struct lsdc_device *ldev = primary->ldev;
+	u32 status;
+
+	status = lsdc_rreg32(ldev, LSDC_CRTC1_CFG_REG);
+
+	/*
+	 * TODO: add RGB565 support, only support XRBG8888 at present
+	 */
+	status &= ~CFG_PIX_FMT_MASK;
+	status |= LSDC_PF_XRGB8888;
+
+	lsdc_wreg32(ldev, LSDC_CRTC1_CFG_REG, status);
+}
+
+static const struct lsdc_primary_plane_ops lsdc_primary_plane_hw_ops[2] = {
+	{
+		.update_fb_addr = lsdc_primary0_update_fb_addr,
+		.update_fb_stride = lsdc_primary0_update_fb_stride,
+		.update_fb_format = lsdc_primary0_update_fb_format,
+	},
+	{
+		.update_fb_addr = lsdc_primary1_update_fb_addr,
+		.update_fb_stride = lsdc_primary1_update_fb_stride,
+		.update_fb_format = lsdc_primary1_update_fb_format,
+	},
+};
+
+/*
+ * Update location, format, enable and disable state of the cursor,
+ * For those who have two hardware cursor, let cursor 0 is attach to CRTC-0,
+ * cursor 1 is attach to CRTC-1. Compositing the primary plane and cursor
+ * plane is automatically done by hardware, the cursor is alway on the top of
+ * the primary plane. In other word, z-order is fixed in hardware and cannot
+ * be changed. For those old DC who has only one hardware cursor, we made it
+ * shared by the two screen, this works on extend screen mode.
+ */
+
+/* cursor plane 0 (for pipe 0) related hardware ops */
+
+static void lsdc_cursor0_update_bo_addr(struct lsdc_cursor *cursor, u64 addr)
+{
+	struct lsdc_device *ldev = cursor->ldev;
+
+	/* 40-bit width physical address bus */
+	lsdc_wreg32(ldev, LSDC_CURSOR0_ADDR_HI_REG, (addr >> 32) & 0xFF);
+	lsdc_wreg32(ldev, LSDC_CURSOR0_ADDR_LO_REG, addr);
+}
+
+static void lsdc_cursor0_update_position(struct lsdc_cursor *cursor, int x, int y)
+{
+	struct lsdc_device *ldev = cursor->ldev;
+
+	if (x < 0)
+		x = 0;
+
+	if (y < 0)
+		y = 0;
+
+	lsdc_wreg32(ldev, LSDC_CURSOR0_POSITION_REG, (y << 16) | x);
+}
+
+static void lsdc_cursor0_update_cfg(struct lsdc_cursor *cursor,
+				    enum lsdc_cursor_size cursor_size,
+				    enum lsdc_cursor_format fmt)
+{
+	struct lsdc_device *ldev = cursor->ldev;
+	u32 cfg;
+
+	cfg = CURSOR_ON_CRTC0 << CURSOR_LOCATION_SHIFT |
+	      cursor_size << CURSOR_SIZE_SHIFT |
+	      fmt << CURSOR_FORMAT_SHIFT;
+
+	lsdc_wreg32(ldev, LSDC_CURSOR0_CFG_REG, cfg);
+}
+
+/* cursor plane 1 (for pipe 1) related hardware ops */
+
+static void lsdc_cursor1_update_bo_addr(struct lsdc_cursor *cursor, u64 addr)
+{
+	struct lsdc_device *ldev = cursor->ldev;
+
+	/* 40-bit width physical address bus */
+	lsdc_wreg32(ldev, LSDC_CURSOR1_ADDR_HI_REG, (addr >> 32) & 0xFF);
+	lsdc_wreg32(ldev, LSDC_CURSOR1_ADDR_LO_REG, addr);
+}
+
+static void lsdc_cursor1_update_position(struct lsdc_cursor *cursor, int x, int y)
+{
+	struct lsdc_device *ldev = cursor->ldev;
+
+	if (x < 0)
+		x = 0;
+
+	if (y < 0)
+		y = 0;
+
+	lsdc_wreg32(ldev, LSDC_CURSOR1_POSITION_REG, (y << 16) | x);
+}
+
+static void lsdc_cursor1_update_cfg(struct lsdc_cursor *cursor,
+				    enum lsdc_cursor_size cursor_size,
+				    enum lsdc_cursor_format fmt)
+{
+	struct lsdc_device *ldev = cursor->ldev;
+	u32 cfg;
+
+	cfg = CURSOR_ON_CRTC1 << CURSOR_LOCATION_SHIFT |
+	      cursor_size << CURSOR_SIZE_SHIFT |
+	      fmt << CURSOR_FORMAT_SHIFT;
+
+	lsdc_wreg32(ldev, LSDC_CURSOR1_CFG_REG, cfg);
+}
+
+/* The hardware cursors become normal since ls7a2000/ls2k2000 */
+
+static const struct lsdc_cursor_plane_ops ls7a2000_cursor_hw_ops[2] = {
+	{
+		.update_bo_addr = lsdc_cursor0_update_bo_addr,
+		.update_cfg = lsdc_cursor0_update_cfg,
+		.update_position = lsdc_cursor0_update_position,
+	},
+	{
+		.update_bo_addr = lsdc_cursor1_update_bo_addr,
+		.update_cfg = lsdc_cursor1_update_cfg,
+		.update_position = lsdc_cursor1_update_position,
+	},
+};
+
+/* Quirks for cursor 1, only for old loongson display controller */
+
+static void lsdc_cursor1_update_bo_addr_quirk(struct lsdc_cursor *cursor, u64 addr)
+{
+	struct lsdc_device *ldev = cursor->ldev;
+
+	/* 40-bit width physical address bus */
+	lsdc_wreg32(ldev, LSDC_CURSOR0_ADDR_HI_REG, (addr >> 32) & 0xFF);
+	lsdc_wreg32(ldev, LSDC_CURSOR0_ADDR_LO_REG, addr);
+}
+
+static void lsdc_cursor1_update_position_quirk(struct lsdc_cursor *cursor, int x, int y)
+{
+	struct lsdc_device *ldev = cursor->ldev;
+
+	if (x < 0)
+		x = 0;
+
+	if (y < 0)
+		y = 0;
+
+	lsdc_wreg32(ldev, LSDC_CURSOR0_POSITION_REG, (y << 16) | x);
+}
+
+static void lsdc_cursor1_update_cfg_quirk(struct lsdc_cursor *cursor,
+					  enum lsdc_cursor_size cursor_size,
+					  enum lsdc_cursor_format fmt)
+{
+	struct lsdc_device *ldev = cursor->ldev;
+	u32 cfg;
+
+	cfg = CURSOR_ON_CRTC1 << CURSOR_LOCATION_SHIFT |
+	      cursor_size << CURSOR_SIZE_SHIFT |
+	      fmt << CURSOR_FORMAT_SHIFT;
+
+	lsdc_wreg32(ldev, LSDC_CURSOR0_CFG_REG, cfg);
+}
+
+/*
+ * The unforgiving LS7A1000/LS2K1000 has only one hardware cursors plane
+ */
+static const struct lsdc_cursor_plane_ops ls7a1000_cursor_hw_ops[2] = {
+	{
+		.update_bo_addr = lsdc_cursor0_update_bo_addr,
+		.update_cfg = lsdc_cursor0_update_cfg,
+		.update_position = lsdc_cursor0_update_position,
+	},
+	{
+		.update_bo_addr = lsdc_cursor1_update_bo_addr_quirk,
+		.update_cfg = lsdc_cursor1_update_cfg_quirk,
+		.update_position = lsdc_cursor1_update_position_quirk,
+	},
+};
+
+int lsdc_primary_plane_init(struct drm_device *ddev,
+			    struct drm_plane *plane,
+			    unsigned int index)
+{
+	struct lsdc_primary *primary = to_lsdc_primary(plane);
+	int ret;
+
+	ret = drm_universal_plane_init(ddev, plane, 1 << index,
+				       &lsdc_plane_funcs,
+				       lsdc_primary_formats,
+				       ARRAY_SIZE(lsdc_primary_formats),
+				       lsdc_fb_format_modifiers,
+				       DRM_PLANE_TYPE_PRIMARY,
+				       "ls-primary-plane-%u", index);
+	if (ret)
+		return ret;
+
+	drm_plane_helper_add(plane, &lsdc_primary_helper_funcs);
+
+	primary->ldev = to_lsdc(ddev);
+	primary->ops = &lsdc_primary_plane_hw_ops[index];
+
+	return 0;
+}
+
+int ls7a1000_cursor_plane_init(struct drm_device *ddev,
+			       struct drm_plane *plane,
+			       unsigned int index)
+{
+	struct lsdc_cursor *cursor = to_lsdc_cursor(plane);
+	int ret;
+
+	ret = drm_universal_plane_init(ddev, plane, 1 << index,
+				       &lsdc_plane_funcs,
+				       lsdc_cursor_formats,
+				       ARRAY_SIZE(lsdc_cursor_formats),
+				       lsdc_fb_format_modifiers,
+				       DRM_PLANE_TYPE_CURSOR,
+				       "ls-cursor-plane-%u", index);
+	if (ret)
+		return ret;
+
+	cursor->ldev = to_lsdc(ddev);
+	cursor->ops = &ls7a1000_cursor_hw_ops[index];
+
+	drm_plane_helper_add(plane, &ls7a1000_cursor_plane_helper_funcs);
+
+	return 0;
+}
+
+int ls7a2000_cursor_plane_init(struct drm_device *ddev,
+			       struct drm_plane *plane,
+			       unsigned int index)
+{
+	struct lsdc_cursor *cursor = to_lsdc_cursor(plane);
+	int ret;
+
+	ret = drm_universal_plane_init(ddev, plane, 1 << index,
+				       &lsdc_plane_funcs,
+				       lsdc_cursor_formats,
+				       ARRAY_SIZE(lsdc_cursor_formats),
+				       lsdc_fb_format_modifiers,
+				       DRM_PLANE_TYPE_CURSOR,
+				       "ls-cursor-plane-%u", index);
+	if (ret)
+		return ret;
+
+	cursor->ldev = to_lsdc(ddev);
+	cursor->ops = &ls7a2000_cursor_hw_ops[index];
+
+	drm_plane_helper_add(plane, &ls7a2000_cursor_plane_helper_funcs);
+
+	return 0;
+}
diff --git a/drivers/gpu/drm/loongson/lsdc_probe.c b/drivers/gpu/drm/loongson/lsdc_probe.c
new file mode 100644
index 000000000..48ba69bb8
--- /dev/null
+++ b/drivers/gpu/drm/loongson/lsdc_probe.c
@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2023 Loongson Technology Corporation Limited
+ */
+
+#include "lsdc_drv.h"
+#include "lsdc_probe.h"
+
+/*
+ * Processor ID (implementation) values for bits 15:8 of the PRID register.
+ */
+#define LOONGSON_CPU_IMP_MASK           0xff00
+#define LOONGSON_CPU_IMP_SHIFT          8
+
+#define LOONGARCH_CPU_IMP_LS2K1000      0xa0
+#define LOONGARCH_CPU_IMP_LS2K2000      0xb0
+#define LOONGARCH_CPU_IMP_LS3A5000      0xc0
+
+#define LOONGSON_CPU_MIPS_IMP_LS2K      0x61 /* Loongson 2K Mips series SoC */
+
+/*
+ * Particular Revision values for bits 7:0 of the PRID register.
+ */
+#define LOONGSON_CPU_REV_MASK           0x00ff
+
+#define LOONGARCH_CPUCFG_PRID_REG       0x0
+
+/*
+ * We can achieve fine-grained control with the information about the host.
+ */
+
+unsigned int loongson_cpu_get_prid(u8 *imp, u8 *rev)
+{
+	unsigned int prid = 0;
+
+#if defined(__loongarch__)
+	__asm__ volatile("cpucfg %0, %1\n\t"
+			: "=&r"(prid)
+			: "r"(LOONGARCH_CPUCFG_PRID_REG)
+			);
+#endif
+
+#if defined(__mips__)
+	__asm__ volatile("mfc0\t%0, $15\n\t"
+			: "=r" (prid)
+			);
+#endif
+
+	if (imp)
+		*imp = (prid & LOONGSON_CPU_IMP_MASK) >> LOONGSON_CPU_IMP_SHIFT;
+
+	if (rev)
+		*rev = prid & LOONGSON_CPU_REV_MASK;
+
+	return prid;
+}
diff --git a/drivers/gpu/drm/loongson/lsdc_probe.h b/drivers/gpu/drm/loongson/lsdc_probe.h
new file mode 100644
index 000000000..8bb6de2e3
--- /dev/null
+++ b/drivers/gpu/drm/loongson/lsdc_probe.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2023 Loongson Technology Corporation Limited
+ */
+
+#ifndef __LSDC_PROBE_H__
+#define __LSDC_PROBE_H__
+
+/* Helpers for chip detection */
+unsigned int loongson_cpu_get_prid(u8 *impl, u8 *rev);
+
+#endif
diff --git a/drivers/gpu/drm/loongson/lsdc_regs.h b/drivers/gpu/drm/loongson/lsdc_regs.h
new file mode 100644
index 000000000..e8ea28689
--- /dev/null
+++ b/drivers/gpu/drm/loongson/lsdc_regs.h
@@ -0,0 +1,406 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2023 Loongson Technology Corporation Limited
+ */
+
+#ifndef __LSDC_REGS_H__
+#define __LSDC_REGS_H__
+
+#include <linux/bitops.h>
+#include <linux/types.h>
+
+/*
+ * PIXEL PLL Reference clock
+ */
+#define LSDC_PLL_REF_CLK_KHZ            100000
+
+/*
+ * Those PLL registers are relative to LSxxxxx_CFG_REG_BASE. xxxxx = 7A1000,
+ * 7A2000, 2K2000, 2K1000 etc.
+ */
+
+/* LS7A1000 */
+
+#define LS7A1000_PIXPLL0_REG            0x04B0
+#define LS7A1000_PIXPLL1_REG            0x04C0
+
+/* The DC, GPU, Graphic Memory Controller share the single gfxpll */
+#define LS7A1000_PLL_GFX_REG            0x0490
+
+#define LS7A1000_CONF_REG_BASE          0x10010000
+
+/* LS7A2000 */
+
+#define LS7A2000_PIXPLL0_REG            0x04B0
+#define LS7A2000_PIXPLL1_REG            0x04C0
+
+/* The DC, GPU, Graphic Memory Controller share the single gfxpll */
+#define LS7A2000_PLL_GFX_REG            0x0490
+
+#define LS7A2000_CONF_REG_BASE          0x10010000
+
+/* For LSDC_CRTCx_CFG_REG */
+#define CFG_PIX_FMT_MASK                GENMASK(2, 0)
+
+enum lsdc_pixel_format {
+	LSDC_PF_NONE = 0,
+	LSDC_PF_XRGB444 = 1,    /* [12 bits] */
+	LSDC_PF_XRGB555 = 2,    /* [15 bits] */
+	LSDC_PF_XRGB565 = 3,    /* RGB [16 bits] */
+	LSDC_PF_XRGB8888 = 4,   /* XRGB [32 bits] */
+};
+
+/*
+ * Each crtc has two set fb address registers usable, FB_REG_IN_USING bit of
+ * LSDC_CRTCx_CFG_REG indicate which fb address register is in using by the
+ * CRTC currently. CFG_PAGE_FLIP is used to trigger the switch, the switching
+ * will be finished at the very next vblank. Trigger it again if you want to
+ * switch back.
+ *
+ * If FB0_ADDR_REG is in using, we write the address to FB0_ADDR_REG,
+ * if FB1_ADDR_REG is in using, we write the address to FB1_ADDR_REG.
+ */
+#define CFG_PAGE_FLIP                   BIT(7)
+#define CFG_OUTPUT_ENABLE               BIT(8)
+#define CFG_HW_CLONE                    BIT(9)
+/* Indicate witch fb addr reg is in using, currently. read only */
+#define FB_REG_IN_USING                 BIT(11)
+#define CFG_GAMMA_EN                    BIT(12)
+
+/* The DC get soft reset if this bit changed from "1" to "0", active low */
+#define CFG_RESET_N                     BIT(20)
+/* If this bit is set, it say that the CRTC stop working anymore, anchored. */
+#define CRTC_ANCHORED                   BIT(24)
+
+/*
+ * The DMA step of the DC in LS7A2000/LS2K2000 is configurable,
+ * setting those bits on ls7a1000 platform make no effect.
+ */
+#define CFG_DMA_STEP_MASK              GENMASK(17, 16)
+#define CFG_DMA_STEP_SHIFT             16
+enum lsdc_dma_steps {
+	LSDC_DMA_STEP_256_BYTES = 0,
+	LSDC_DMA_STEP_128_BYTES = 1,
+	LSDC_DMA_STEP_64_BYTES = 2,
+	LSDC_DMA_STEP_32_BYTES = 3,
+};
+
+#define CFG_VALID_BITS_MASK             GENMASK(20, 0)
+
+/* For LSDC_CRTCx_HSYNC_REG */
+#define HSYNC_INV                       BIT(31)
+#define HSYNC_EN                        BIT(30)
+#define HSYNC_END_MASK                  GENMASK(28, 16)
+#define HSYNC_END_SHIFT                 16
+#define HSYNC_START_MASK                GENMASK(12, 0)
+#define HSYNC_START_SHIFT               0
+
+/* For LSDC_CRTCx_VSYNC_REG */
+#define VSYNC_INV                       BIT(31)
+#define VSYNC_EN                        BIT(30)
+#define VSYNC_END_MASK                  GENMASK(27, 16)
+#define VSYNC_END_SHIFT                 16
+#define VSYNC_START_MASK                GENMASK(11, 0)
+#define VSYNC_START_SHIFT               0
+
+/*********** CRTC0 ***********/
+#define LSDC_CRTC0_CFG_REG              0x1240
+#define LSDC_CRTC0_FB0_ADDR_LO_REG      0x1260
+#define LSDC_CRTC0_FB0_ADDR_HI_REG      0x15A0
+#define LSDC_CRTC0_STRIDE_REG           0x1280
+#define LSDC_CRTC0_FB_ORIGIN_REG        0x1300
+#define LSDC_CRTC0_HDISPLAY_REG         0x1400
+#define LSDC_CRTC0_HSYNC_REG            0x1420
+#define LSDC_CRTC0_VDISPLAY_REG         0x1480
+#define LSDC_CRTC0_VSYNC_REG            0x14A0
+#define LSDC_CRTC0_GAMMA_INDEX_REG      0x14E0
+#define LSDC_CRTC0_GAMMA_DATA_REG       0x1500
+#define LSDC_CRTC0_FB1_ADDR_LO_REG      0x1580
+#define LSDC_CRTC0_FB1_ADDR_HI_REG      0x15C0
+
+/*********** CRTC1 ***********/
+#define LSDC_CRTC1_CFG_REG              0x1250
+#define LSDC_CRTC1_FB0_ADDR_LO_REG      0x1270
+#define LSDC_CRTC1_FB0_ADDR_HI_REG      0x15B0
+#define LSDC_CRTC1_STRIDE_REG           0x1290
+#define LSDC_CRTC1_FB_ORIGIN_REG        0x1310
+#define LSDC_CRTC1_HDISPLAY_REG         0x1410
+#define LSDC_CRTC1_HSYNC_REG            0x1430
+#define LSDC_CRTC1_VDISPLAY_REG         0x1490
+#define LSDC_CRTC1_VSYNC_REG            0x14B0
+#define LSDC_CRTC1_GAMMA_INDEX_REG      0x14F0
+#define LSDC_CRTC1_GAMMA_DATA_REG       0x1510
+#define LSDC_CRTC1_FB1_ADDR_LO_REG      0x1590
+#define LSDC_CRTC1_FB1_ADDR_HI_REG      0x15D0
+
+/* For LSDC_CRTCx_DVO_CONF_REG */
+#define PHY_CLOCK_POL                   BIT(9)
+#define PHY_CLOCK_EN                    BIT(8)
+#define PHY_DE_POL                      BIT(1)
+#define PHY_DATA_EN                     BIT(0)
+
+/*********** DVO0 ***********/
+#define LSDC_CRTC0_DVO_CONF_REG         0x13C0
+
+/*********** DVO1 ***********/
+#define LSDC_CRTC1_DVO_CONF_REG         0x13D0
+
+/*
+ * All of the DC variants has the hardware which record the scan position
+ * of the CRTC, [31:16] : current X position, [15:0] : current Y position
+ */
+#define LSDC_CRTC0_SCAN_POS_REG         0x14C0
+#define LSDC_CRTC1_SCAN_POS_REG         0x14D0
+
+/*
+ * LS7A2000 has Sync Deviation register.
+ */
+#define SYNC_DEVIATION_EN               BIT(31)
+#define SYNC_DEVIATION_NUM              GENMASK(12, 0)
+#define LSDC_CRTC0_SYNC_DEVIATION_REG   0x1B80
+#define LSDC_CRTC1_SYNC_DEVIATION_REG   0x1B90
+
+/*
+ * In gross, LSDC_CRTC1_XXX_REG - LSDC_CRTC0_XXX_REG = 0x10, but not all of
+ * the registers obey this rule, LSDC_CURSORx_XXX_REG just don't honor this.
+ * This is the root cause we can't untangle the code by manpulating offset
+ * of the register access simply. Our hardware engineers are lack experiance
+ * when they design this...
+ */
+#define CRTC_PIPE_OFFSET                0x10
+
+/*
+ * There is only one hardware cursor unit in LS7A1000 and LS2K1000, let
+ * CFG_HW_CLONE_EN bit be "1" could eliminate this embarrassment, we made
+ * it on custom clone mode application. While LS7A2000 has two hardware
+ * cursor unit which is good enough.
+ */
+#define CURSOR_FORMAT_MASK              GENMASK(1, 0)
+#define CURSOR_FORMAT_SHIFT             0
+enum lsdc_cursor_format {
+	CURSOR_FORMAT_DISABLE = 0,
+	CURSOR_FORMAT_MONOCHROME = 1,   /* masked */
+	CURSOR_FORMAT_ARGB8888 = 2,     /* A8R8G8B8 */
+};
+
+/*
+ * LS7A1000 and LS2K1000 only support 32x32, LS2K2000 and LS7A2000 support
+ * 64x64, but it seems that setting this bit make no harms on LS7A1000, it
+ * just don't take effects.
+ */
+#define CURSOR_SIZE_SHIFT               2
+enum lsdc_cursor_size {
+	CURSOR_SIZE_32X32 = 0,
+	CURSOR_SIZE_64X64 = 1,
+};
+
+#define CURSOR_LOCATION_SHIFT           4
+enum lsdc_cursor_location {
+	CURSOR_ON_CRTC0 = 0,
+	CURSOR_ON_CRTC1 = 1,
+};
+
+#define LSDC_CURSOR0_CFG_REG            0x1520
+#define LSDC_CURSOR0_ADDR_LO_REG        0x1530
+#define LSDC_CURSOR0_ADDR_HI_REG        0x15e0
+#define LSDC_CURSOR0_POSITION_REG       0x1540  /* [31:16] Y, [15:0] X */
+#define LSDC_CURSOR0_BG_COLOR_REG       0x1550  /* background color */
+#define LSDC_CURSOR0_FG_COLOR_REG       0x1560  /* foreground color */
+
+#define LSDC_CURSOR1_CFG_REG            0x1670
+#define LSDC_CURSOR1_ADDR_LO_REG        0x1680
+#define LSDC_CURSOR1_ADDR_HI_REG        0x16e0
+#define LSDC_CURSOR1_POSITION_REG       0x1690  /* [31:16] Y, [15:0] X */
+#define LSDC_CURSOR1_BG_COLOR_REG       0x16A0  /* background color */
+#define LSDC_CURSOR1_FG_COLOR_REG       0x16B0  /* foreground color */
+
+/*
+ * DC Interrupt Control Register, 32bit, Address Offset: 1570
+ *
+ * Bits 15:0 inidicate the interrupt status
+ * Bits 31:16 control enable interrupts corresponding to bit 15:0 or not
+ * Write 1 to enable, write 0 to disable
+ *
+ * RF: Read Finished
+ * IDBU: Internal Data Buffer Underflow
+ * IDBFU: Internal Data Buffer Fatal Underflow
+ * CBRF: Cursor Buffer Read Finished Flag, no use.
+ * FBRF0: CRTC-0 reading from its framebuffer finished.
+ * FBRF1: CRTC-1 reading from its framebuffer finished.
+ *
+ * +-------+--------------------------+-------+--------+--------+-------+
+ * | 31:27 |         26:16            | 15:11 |   10   |   9    |   8   |
+ * +-------+--------------------------+-------+--------+--------+-------+
+ * |  N/A  | Interrupt Enable Control |  N/A  | IDBFU0 | IDBFU1 | IDBU0 |
+ * +-------+--------------------------+-------+--------+--------+-------+
+ *
+ * +-------+-------+-------+------+--------+--------+--------+--------+
+ * |   7   |   6   |   5   |  4   |   3    |   2    |   1    |   0    |
+ * +-------+-------+-------+------+--------+--------+--------+--------+
+ * | IDBU1 | FBRF0 | FBRF1 | CRRF | HSYNC0 | VSYNC0 | HSYNC1 | VSYNC1 |
+ * +-------+-------+-------+------+--------+--------+--------+--------+
+ *
+ * unfortunately, CRTC0's interrupt is mess with CRTC1's interrupt in one
+ * register again.
+ */
+
+#define LSDC_INT_REG                    0x1570
+
+#define INT_CRTC0_VSYNC                 BIT(2)
+#define INT_CRTC0_HSYNC                 BIT(3)
+#define INT_CRTC0_RF                    BIT(6)
+#define INT_CRTC0_IDBU                  BIT(8)
+#define INT_CRTC0_IDBFU                 BIT(10)
+
+#define INT_CRTC1_VSYNC                 BIT(0)
+#define INT_CRTC1_HSYNC                 BIT(1)
+#define INT_CRTC1_RF                    BIT(5)
+#define INT_CRTC1_IDBU                  BIT(7)
+#define INT_CRTC1_IDBFU                 BIT(9)
+
+#define INT_CRTC0_VSYNC_EN              BIT(18)
+#define INT_CRTC0_HSYNC_EN              BIT(19)
+#define INT_CRTC0_RF_EN                 BIT(22)
+#define INT_CRTC0_IDBU_EN               BIT(24)
+#define INT_CRTC0_IDBFU_EN              BIT(26)
+
+#define INT_CRTC1_VSYNC_EN              BIT(16)
+#define INT_CRTC1_HSYNC_EN              BIT(17)
+#define INT_CRTC1_RF_EN                 BIT(21)
+#define INT_CRTC1_IDBU_EN               BIT(23)
+#define INT_CRTC1_IDBFU_EN              BIT(25)
+
+#define INT_STATUS_MASK                 GENMASK(15, 0)
+
+/*
+ * LS7A1000/LS7A2000 have 4 gpios which are used to emulated I2C.
+ * They are under control of the LS7A_DC_GPIO_DAT_REG and LS7A_DC_GPIO_DIR_REG
+ * register, Those GPIOs has no relationship whth the GPIO hardware on the
+ * bridge chip itself. Those offsets are relative to DC register base address
+ *
+ * LS2k1000 don't have those registers, they use hardware i2c or general GPIO
+ * emulated i2c from linux i2c subsystem.
+ *
+ * GPIO data register, address offset: 0x1650
+ *   +---------------+-----------+-----------+
+ *   | 7 | 6 | 5 | 4 |  3  |  2  |  1  |  0  |
+ *   +---------------+-----------+-----------+
+ *   |               |    DVO1   |    DVO0   |
+ *   +      N/A      +-----------+-----------+
+ *   |               | SCL | SDA | SCL | SDA |
+ *   +---------------+-----------+-----------+
+ */
+#define LS7A_DC_GPIO_DAT_REG            0x1650
+
+/*
+ *  GPIO Input/Output direction control register, address offset: 0x1660
+ */
+#define LS7A_DC_GPIO_DIR_REG            0x1660
+
+/*
+ *  LS7A2000 has two built-in HDMI Encoder and one VGA encoder
+ */
+
+/*
+ * Number of continuous packets may be present
+ * in HDMI hblank and vblank zone, should >= 48
+ */
+#define LSDC_HDMI0_ZONE_REG             0x1700
+#define LSDC_HDMI1_ZONE_REG             0x1710
+
+#define HDMI_H_ZONE_IDLE_SHIFT          0
+#define HDMI_V_ZONE_IDLE_SHIFT          16
+
+/* HDMI Iterface Control Reg */
+#define HDMI_INTERFACE_EN               BIT(0)
+#define HDMI_PACKET_EN                  BIT(1)
+#define HDMI_AUDIO_EN                   BIT(2)
+/*
+ * Preamble:
+ * Immediately preceding each video data period or data island period is the
+ * preamble. This is a sequence of eight identical control characters that
+ * indicate whether the upcoming data period is a video data period or is a
+ * data island. The values of CTL0, CTL1, CTL2, and CTL3 indicate the type of
+ * data period that follows.
+ */
+#define HDMI_VIDEO_PREAMBLE_MASK        GENMASK(7, 4)
+#define HDMI_VIDEO_PREAMBLE_SHIFT       4
+/* 1: hw i2c, 0: gpio emu i2c, shouldn't put in LSDC_HDMIx_INTF_CTRL_REG */
+#define HW_I2C_EN                       BIT(8)
+#define HDMI_CTL_PERIOD_MODE            BIT(9)
+#define LSDC_HDMI0_INTF_CTRL_REG        0x1720
+#define LSDC_HDMI1_INTF_CTRL_REG        0x1730
+
+#define HDMI_PHY_EN                     BIT(0)
+#define HDMI_PHY_RESET_N                BIT(1)
+#define HDMI_PHY_TERM_L_EN              BIT(8)
+#define HDMI_PHY_TERM_H_EN              BIT(9)
+#define HDMI_PHY_TERM_DET_EN            BIT(10)
+#define HDMI_PHY_TERM_STATUS            BIT(11)
+#define LSDC_HDMI0_PHY_CTRL_REG         0x1800
+#define LSDC_HDMI1_PHY_CTRL_REG         0x1810
+
+/* High level duration need > 1us */
+#define HDMI_PLL_ENABLE                 BIT(0)
+#define HDMI_PLL_LOCKED                 BIT(16)
+/* Bypass the software configured values, using default source from somewhere */
+#define HDMI_PLL_BYPASS                 BIT(17)
+
+#define HDMI_PLL_IDF_SHIFT              1
+#define HDMI_PLL_IDF_MASK               GENMASK(5, 1)
+#define HDMI_PLL_LF_SHIFT               6
+#define HDMI_PLL_LF_MASK                GENMASK(12, 6)
+#define HDMI_PLL_ODF_SHIFT              13
+#define HDMI_PLL_ODF_MASK               GENMASK(15, 13)
+#define LSDC_HDMI0_PHY_PLL_REG          0x1820
+#define LSDC_HDMI1_PHY_PLL_REG          0x1830
+
+/* LS7A2000/LS2K2000 has hpd status reg, while the two hdmi's status
+ * located at the one register again.
+ */
+#define LSDC_HDMI_HPD_STATUS_REG        0x1BA0
+#define HDMI0_HPD_FLAG                  BIT(0)
+#define HDMI1_HPD_FLAG                  BIT(1)
+
+#define LSDC_HDMI0_PHY_CAL_REG          0x18C0
+#define LSDC_HDMI1_PHY_CAL_REG          0x18D0
+
+/* AVI InfoFrame */
+#define LSDC_HDMI0_AVI_CONTENT0         0x18E0
+#define LSDC_HDMI1_AVI_CONTENT0         0x18D0
+#define LSDC_HDMI0_AVI_CONTENT1         0x1900
+#define LSDC_HDMI1_AVI_CONTENT1         0x1910
+#define LSDC_HDMI0_AVI_CONTENT2         0x1920
+#define LSDC_HDMI1_AVI_CONTENT2         0x1930
+#define LSDC_HDMI0_AVI_CONTENT3         0x1940
+#define LSDC_HDMI1_AVI_CONTENT3         0x1950
+
+/* 1: enable avi infoframe packet, 0: disable avi infoframe packet */
+#define AVI_PKT_ENABLE                  BIT(0)
+/* 1: send one every two frame, 0: send one each frame */
+#define AVI_PKT_SEND_FREQ               BIT(1)
+/*
+ * 1: write 1 to flush avi reg content0 ~ content3 to the packet to be send,
+ * The hardware will clear this bit automatically.
+ */
+#define AVI_PKT_UPDATE                  BIT(2)
+
+#define LSDC_HDMI0_AVI_INFO_CRTL_REG    0x1960
+#define LSDC_HDMI1_AVI_INFO_CRTL_REG    0x1970
+
+/*
+ * LS7A2000 has the hardware which count the number of vblank generated
+ */
+#define LSDC_CRTC0_VSYNC_COUNTER_REG    0x1A00
+#define LSDC_CRTC1_VSYNC_COUNTER_REG    0x1A10
+
+/*
+ * LS7A2000 has the audio hardware associate with the HDMI encoder.
+ */
+#define LSDC_HDMI0_AUDIO_PLL_LO_REG     0x1A20
+#define LSDC_HDMI1_AUDIO_PLL_LO_REG     0x1A30
+
+#define LSDC_HDMI0_AUDIO_PLL_HI_REG     0x1A40
+#define LSDC_HDMI1_AUDIO_PLL_HI_REG     0x1A50
+
+#endif
diff --git a/drivers/gpu/drm/loongson/lsdc_ttm.c b/drivers/gpu/drm/loongson/lsdc_ttm.c
new file mode 100644
index 000000000..d7441d96a
--- /dev/null
+++ b/drivers/gpu/drm/loongson/lsdc_ttm.c
@@ -0,0 +1,589 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2023 Loongson Technology Corporation Limited
+ */
+
+#include <drm/drm_drv.h>
+#include <drm/drm_file.h>
+#include <drm/drm_gem.h>
+#include <drm/drm_managed.h>
+#include <drm/drm_prime.h>
+#include <drm/drm_print.h>
+
+#include "lsdc_drv.h"
+#include "lsdc_ttm.h"
+
+const char *lsdc_mem_type_to_str(uint32_t mem_type)
+{
+	switch (mem_type) {
+	case TTM_PL_VRAM:
+		return "VRAM";
+	case TTM_PL_TT:
+		return "GTT";
+	case TTM_PL_SYSTEM:
+		return "SYSTEM";
+	default:
+		break;
+	}
+
+	return "Unknown";
+}
+
+const char *lsdc_domain_to_str(u32 domain)
+{
+	switch (domain) {
+	case LSDC_GEM_DOMAIN_VRAM:
+		return "VRAM";
+	case LSDC_GEM_DOMAIN_GTT:
+		return "GTT";
+	case LSDC_GEM_DOMAIN_SYSTEM:
+		return "SYSTEM";
+	default:
+		break;
+	}
+
+	return "Unknown";
+}
+
+static void lsdc_bo_set_placement(struct lsdc_bo *lbo, u32 domain)
+{
+	u32 c = 0;
+	u32 pflags = 0;
+	u32 i;
+
+	if (lbo->tbo.base.size <= PAGE_SIZE)
+		pflags |= TTM_PL_FLAG_TOPDOWN;
+
+	lbo->placement.placement = lbo->placements;
+
+	if (domain & LSDC_GEM_DOMAIN_VRAM) {
+		lbo->placements[c].mem_type = TTM_PL_VRAM;
+		lbo->placements[c++].flags = pflags;
+	}
+
+	if (domain & LSDC_GEM_DOMAIN_GTT) {
+		lbo->placements[c].mem_type = TTM_PL_TT;
+		lbo->placements[c++].flags = pflags;
+	}
+
+	if (domain & LSDC_GEM_DOMAIN_SYSTEM) {
+		lbo->placements[c].mem_type = TTM_PL_SYSTEM;
+		lbo->placements[c++].flags = 0;
+	}
+
+	if (!c) {
+		lbo->placements[c].mem_type = TTM_PL_SYSTEM;
+		lbo->placements[c++].flags = 0;
+	}
+
+	lbo->placement.num_placement = c;
+
+	for (i = 0; i < c; ++i) {
+		lbo->placements[i].fpfn = 0;
+		lbo->placements[i].lpfn = 0;
+	}
+}
+
+static void lsdc_ttm_tt_destroy(struct ttm_device *bdev, struct ttm_tt *tt)
+{
+	ttm_tt_fini(tt);
+	kfree(tt);
+}
+
+static struct ttm_tt *
+lsdc_ttm_tt_create(struct ttm_buffer_object *tbo, uint32_t page_flags)
+{
+	struct ttm_tt *tt;
+	int ret;
+
+	tt = kzalloc_obj(*tt);
+	if (!tt)
+		return NULL;
+
+	ret = ttm_sg_tt_init(tt, tbo, page_flags, ttm_cached);
+	if (ret < 0) {
+		kfree(tt);
+		return NULL;
+	}
+
+	return tt;
+}
+
+static int lsdc_ttm_tt_populate(struct ttm_device *bdev,
+				struct ttm_tt *ttm,
+				struct ttm_operation_ctx *ctx)
+{
+	bool slave = !!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL);
+
+	if (slave && ttm->sg) {
+		drm_prime_sg_to_dma_addr_array(ttm->sg,
+					       ttm->dma_address,
+					       ttm->num_pages);
+
+		return 0;
+	}
+
+	return ttm_pool_alloc(&bdev->pool, ttm, ctx);
+}
+
+static void lsdc_ttm_tt_unpopulate(struct ttm_device *bdev,
+				   struct ttm_tt *ttm)
+{
+	bool slave = !!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL);
+
+	if (slave)
+		return;
+
+	return ttm_pool_free(&bdev->pool, ttm);
+}
+
+static void lsdc_bo_evict_flags(struct ttm_buffer_object *tbo,
+				struct ttm_placement *tplacement)
+{
+	struct ttm_resource *resource = tbo->resource;
+	struct lsdc_bo *lbo = to_lsdc_bo(tbo);
+
+	switch (resource->mem_type) {
+	case TTM_PL_VRAM:
+		lsdc_bo_set_placement(lbo, LSDC_GEM_DOMAIN_GTT);
+		break;
+	case TTM_PL_TT:
+	default:
+		lsdc_bo_set_placement(lbo, LSDC_GEM_DOMAIN_SYSTEM);
+		break;
+	}
+
+	*tplacement = lbo->placement;
+}
+
+static int lsdc_bo_move(struct ttm_buffer_object *tbo,
+			bool evict,
+			struct ttm_operation_ctx *ctx,
+			struct ttm_resource *new_mem,
+			struct ttm_place *hop)
+{
+	struct drm_device *ddev = tbo->base.dev;
+	struct ttm_resource *old_mem = tbo->resource;
+	struct lsdc_bo *lbo = to_lsdc_bo(tbo);
+	int ret;
+
+	if (unlikely(tbo->pin_count > 0)) {
+		drm_warn(ddev, "Can't move a pinned BO\n");
+		return -EINVAL;
+	}
+
+	ret = ttm_bo_wait_ctx(tbo, ctx);
+	if (ret)
+		return ret;
+
+	if (!old_mem) {
+		drm_dbg(ddev, "bo[%p] move: NULL to %s, size: %zu\n",
+			lbo, lsdc_mem_type_to_str(new_mem->mem_type),
+			lsdc_bo_size(lbo));
+		ttm_bo_move_null(tbo, new_mem);
+		return 0;
+	}
+
+	if (old_mem->mem_type == TTM_PL_SYSTEM && !tbo->ttm) {
+		ttm_bo_move_null(tbo, new_mem);
+		drm_dbg(ddev, "bo[%p] move: SYSTEM to NULL, size: %zu\n",
+			lbo, lsdc_bo_size(lbo));
+		return 0;
+	}
+
+	if (old_mem->mem_type == TTM_PL_SYSTEM &&
+	    new_mem->mem_type == TTM_PL_TT) {
+		drm_dbg(ddev, "bo[%p] move: SYSTEM to GTT, size: %zu\n",
+			lbo, lsdc_bo_size(lbo));
+		ttm_bo_move_null(tbo, new_mem);
+		return 0;
+	}
+
+	if (old_mem->mem_type == TTM_PL_TT &&
+	    new_mem->mem_type == TTM_PL_SYSTEM) {
+		drm_dbg(ddev, "bo[%p] move: GTT to SYSTEM, size: %zu\n",
+			lbo, lsdc_bo_size(lbo));
+		ttm_resource_free(tbo, &tbo->resource);
+		ttm_bo_assign_mem(tbo, new_mem);
+		return 0;
+	}
+
+	drm_dbg(ddev, "bo[%p] move: %s to %s, size: %zu\n",
+		lbo,
+		lsdc_mem_type_to_str(old_mem->mem_type),
+		lsdc_mem_type_to_str(new_mem->mem_type),
+		lsdc_bo_size(lbo));
+
+	return ttm_bo_move_memcpy(tbo, ctx, new_mem);
+}
+
+static int lsdc_bo_reserve_io_mem(struct ttm_device *bdev,
+				  struct ttm_resource *mem)
+{
+	struct lsdc_device *ldev = tdev_to_ldev(bdev);
+
+	switch (mem->mem_type) {
+	case TTM_PL_SYSTEM:
+		break;
+	case TTM_PL_TT:
+		break;
+	case TTM_PL_VRAM:
+		mem->bus.offset = (mem->start << PAGE_SHIFT) + ldev->vram_base;
+		mem->bus.is_iomem = true;
+		mem->bus.caching = ttm_write_combined;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static struct ttm_device_funcs lsdc_bo_driver = {
+	.ttm_tt_create = lsdc_ttm_tt_create,
+	.ttm_tt_populate = lsdc_ttm_tt_populate,
+	.ttm_tt_unpopulate = lsdc_ttm_tt_unpopulate,
+	.ttm_tt_destroy = lsdc_ttm_tt_destroy,
+	.eviction_valuable = ttm_bo_eviction_valuable,
+	.evict_flags = lsdc_bo_evict_flags,
+	.move = lsdc_bo_move,
+	.io_mem_reserve = lsdc_bo_reserve_io_mem,
+};
+
+u64 lsdc_bo_gpu_offset(struct lsdc_bo *lbo)
+{
+	struct ttm_buffer_object *tbo = &lbo->tbo;
+	struct drm_device *ddev = tbo->base.dev;
+	struct ttm_resource *resource = tbo->resource;
+
+	if (unlikely(!tbo->pin_count)) {
+		drm_err(ddev, "unpinned bo, gpu virtual address is invalid\n");
+		return 0;
+	}
+
+	if (unlikely(resource->mem_type == TTM_PL_SYSTEM))
+		return 0;
+
+	return resource->start << PAGE_SHIFT;
+}
+
+size_t lsdc_bo_size(struct lsdc_bo *lbo)
+{
+	struct ttm_buffer_object *tbo = &lbo->tbo;
+
+	return tbo->base.size;
+}
+
+int lsdc_bo_reserve(struct lsdc_bo *lbo)
+{
+	return ttm_bo_reserve(&lbo->tbo, true, false, NULL);
+}
+
+void lsdc_bo_unreserve(struct lsdc_bo *lbo)
+{
+	return ttm_bo_unreserve(&lbo->tbo);
+}
+
+int lsdc_bo_pin(struct lsdc_bo *lbo, u32 domain, u64 *gpu_addr)
+{
+	struct ttm_operation_ctx ctx = { false, false };
+	struct ttm_buffer_object *tbo = &lbo->tbo;
+	struct lsdc_device *ldev = tdev_to_ldev(tbo->bdev);
+	int ret;
+
+	if (tbo->pin_count)
+		goto bo_pinned;
+
+	if (lbo->sharing_count && domain == LSDC_GEM_DOMAIN_VRAM)
+		return -EINVAL;
+
+	if (domain)
+		lsdc_bo_set_placement(lbo, domain);
+
+	ret = ttm_bo_validate(tbo, &lbo->placement, &ctx);
+	if (unlikely(ret)) {
+		drm_err(&ldev->base, "%p validate failed: %d\n", lbo, ret);
+		return ret;
+	}
+
+	if (domain == LSDC_GEM_DOMAIN_VRAM)
+		ldev->vram_pinned_size += lsdc_bo_size(lbo);
+	else if (domain == LSDC_GEM_DOMAIN_GTT)
+		ldev->gtt_pinned_size += lsdc_bo_size(lbo);
+
+bo_pinned:
+	ttm_bo_pin(tbo);
+
+	if (gpu_addr)
+		*gpu_addr = lsdc_bo_gpu_offset(lbo);
+
+	return 0;
+}
+
+void lsdc_bo_unpin(struct lsdc_bo *lbo)
+{
+	struct ttm_buffer_object *tbo = &lbo->tbo;
+	struct lsdc_device *ldev = tdev_to_ldev(tbo->bdev);
+
+	if (unlikely(!tbo->pin_count)) {
+		drm_dbg(&ldev->base, "%p unpin is not necessary\n", lbo);
+		return;
+	}
+
+	ttm_bo_unpin(tbo);
+
+	if (!tbo->pin_count) {
+		if (tbo->resource->mem_type == TTM_PL_VRAM)
+			ldev->vram_pinned_size -= lsdc_bo_size(lbo);
+		else if (tbo->resource->mem_type == TTM_PL_TT)
+			ldev->gtt_pinned_size -= lsdc_bo_size(lbo);
+	}
+}
+
+void lsdc_bo_ref(struct lsdc_bo *lbo)
+{
+	drm_gem_object_get(&lbo->tbo.base);
+}
+
+void lsdc_bo_unref(struct lsdc_bo *lbo)
+{
+	drm_gem_object_put(&lbo->tbo.base);
+}
+
+int lsdc_bo_kmap(struct lsdc_bo *lbo)
+{
+	struct ttm_buffer_object *tbo = &lbo->tbo;
+	struct drm_gem_object *gem = &tbo->base;
+	struct drm_device *ddev = gem->dev;
+	long ret;
+	int err;
+
+	ret = dma_resv_wait_timeout(gem->resv, DMA_RESV_USAGE_KERNEL, false,
+				    MAX_SCHEDULE_TIMEOUT);
+	if (ret < 0) {
+		drm_warn(ddev, "wait fence timeout\n");
+		return ret;
+	}
+
+	if (lbo->kptr)
+		return 0;
+
+	err = ttm_bo_kmap(tbo, 0, PFN_UP(lsdc_bo_size(lbo)), &lbo->kmap);
+	if (err) {
+		drm_err(ddev, "kmap %p failed: %d\n", lbo, err);
+		return err;
+	}
+
+	lbo->kptr = ttm_kmap_obj_virtual(&lbo->kmap, &lbo->is_iomem);
+
+	return 0;
+}
+
+void lsdc_bo_kunmap(struct lsdc_bo *lbo)
+{
+	if (!lbo->kptr)
+		return;
+
+	lbo->kptr = NULL;
+	ttm_bo_kunmap(&lbo->kmap);
+}
+
+void lsdc_bo_clear(struct lsdc_bo *lbo)
+{
+	lsdc_bo_kmap(lbo);
+
+	if (lbo->is_iomem)
+		memset_io((void __iomem *)lbo->kptr, 0, lbo->size);
+	else
+		memset(lbo->kptr, 0, lbo->size);
+
+	lsdc_bo_kunmap(lbo);
+}
+
+int lsdc_bo_evict_vram(struct drm_device *ddev)
+{
+	struct lsdc_device *ldev = to_lsdc(ddev);
+	struct ttm_device *bdev = &ldev->bdev;
+	struct ttm_resource_manager *man;
+
+	man = ttm_manager_type(bdev, TTM_PL_VRAM);
+	if (unlikely(!man))
+		return 0;
+
+	return ttm_resource_manager_evict_all(bdev, man);
+}
+
+static void lsdc_bo_destroy(struct ttm_buffer_object *tbo)
+{
+	struct lsdc_device *ldev = tdev_to_ldev(tbo->bdev);
+	struct lsdc_bo *lbo = to_lsdc_bo(tbo);
+
+	mutex_lock(&ldev->gem.mutex);
+	list_del_init(&lbo->list);
+	mutex_unlock(&ldev->gem.mutex);
+
+	drm_gem_object_release(&tbo->base);
+
+	kfree(lbo);
+}
+
+struct lsdc_bo *lsdc_bo_create(struct drm_device *ddev,
+			       u32 domain,
+			       size_t size,
+			       bool kernel,
+			       struct sg_table *sg,
+			       struct dma_resv *resv)
+{
+	struct lsdc_device *ldev = to_lsdc(ddev);
+	struct ttm_device *bdev = &ldev->bdev;
+	struct ttm_buffer_object *tbo;
+	struct lsdc_bo *lbo;
+	enum ttm_bo_type bo_type;
+	int ret;
+
+	lbo = kzalloc_obj(*lbo);
+	if (!lbo)
+		return ERR_PTR(-ENOMEM);
+
+	INIT_LIST_HEAD(&lbo->list);
+
+	lbo->initial_domain = domain & (LSDC_GEM_DOMAIN_VRAM |
+					LSDC_GEM_DOMAIN_GTT |
+					LSDC_GEM_DOMAIN_SYSTEM);
+
+	tbo = &lbo->tbo;
+
+	size = ALIGN(size, PAGE_SIZE);
+
+	ret = drm_gem_object_init(ddev, &tbo->base, size);
+	if (ret) {
+		kfree(lbo);
+		return ERR_PTR(ret);
+	}
+
+	tbo->bdev = bdev;
+
+	if (kernel)
+		bo_type = ttm_bo_type_kernel;
+	else if (sg)
+		bo_type = ttm_bo_type_sg;
+	else
+		bo_type = ttm_bo_type_device;
+
+	lsdc_bo_set_placement(lbo, domain);
+	lbo->size = size;
+
+	ret = ttm_bo_init_validate(bdev, tbo, bo_type, &lbo->placement, 0,
+				   false, sg, resv, lsdc_bo_destroy);
+	if (ret) {
+		kfree(lbo);
+		return ERR_PTR(ret);
+	}
+
+	return lbo;
+}
+
+struct lsdc_bo *lsdc_bo_create_kernel_pinned(struct drm_device *ddev,
+					     u32 domain,
+					     size_t size)
+{
+	struct lsdc_bo *lbo;
+	int ret;
+
+	lbo = lsdc_bo_create(ddev, domain, size, true, NULL, NULL);
+	if (IS_ERR(lbo))
+		return ERR_CAST(lbo);
+
+	ret = lsdc_bo_reserve(lbo);
+	if (unlikely(ret)) {
+		lsdc_bo_unref(lbo);
+		return ERR_PTR(ret);
+	}
+
+	ret = lsdc_bo_pin(lbo, domain, NULL);
+	lsdc_bo_unreserve(lbo);
+	if (unlikely(ret)) {
+		lsdc_bo_unref(lbo);
+		return ERR_PTR(ret);
+	}
+
+	return lbo;
+}
+
+void lsdc_bo_free_kernel_pinned(struct lsdc_bo *lbo)
+{
+	int ret;
+
+	ret = lsdc_bo_reserve(lbo);
+	if (unlikely(ret))
+		return;
+
+	lsdc_bo_unpin(lbo);
+	lsdc_bo_unreserve(lbo);
+
+	lsdc_bo_unref(lbo);
+}
+
+static void lsdc_ttm_fini(struct drm_device *ddev, void *data)
+{
+	struct lsdc_device *ldev = (struct lsdc_device *)data;
+
+	ttm_range_man_fini(&ldev->bdev, TTM_PL_VRAM);
+	ttm_range_man_fini(&ldev->bdev, TTM_PL_TT);
+
+	ttm_device_fini(&ldev->bdev);
+
+	drm_dbg(ddev, "ttm finished\n");
+}
+
+int lsdc_ttm_init(struct lsdc_device *ldev)
+{
+	struct drm_device *ddev = &ldev->base;
+	unsigned long num_vram_pages;
+	unsigned long num_gtt_pages;
+	int ret;
+
+	ret = ttm_device_init(&ldev->bdev, &lsdc_bo_driver, ddev->dev,
+			      ddev->anon_inode->i_mapping,
+			      ddev->vma_offset_manager,
+			      TTM_ALLOCATION_POOL_USE_DMA32);
+	if (ret)
+		return ret;
+
+	num_vram_pages = ldev->vram_size >> PAGE_SHIFT;
+
+	ret = ttm_range_man_init(&ldev->bdev, TTM_PL_VRAM, false, num_vram_pages);
+	if (unlikely(ret))
+		return ret;
+
+	drm_info(ddev, "VRAM: %lu pages ready\n", num_vram_pages);
+
+	/* 512M is far enough for us now */
+	ldev->gtt_size = 512 << 20;
+
+	num_gtt_pages = ldev->gtt_size >> PAGE_SHIFT;
+
+	ret = ttm_range_man_init(&ldev->bdev, TTM_PL_TT, true, num_gtt_pages);
+	if (unlikely(ret))
+		return ret;
+
+	drm_info(ddev, "GTT: %lu pages ready\n", num_gtt_pages);
+
+	return drmm_add_action_or_reset(ddev, lsdc_ttm_fini, ldev);
+}
+
+void lsdc_ttm_debugfs_init(struct lsdc_device *ldev)
+{
+	struct ttm_device *bdev = &ldev->bdev;
+	struct drm_device *ddev = &ldev->base;
+	struct drm_minor *minor = ddev->primary;
+	struct dentry *root = minor->debugfs_root;
+	struct ttm_resource_manager *vram_man;
+	struct ttm_resource_manager *gtt_man;
+
+	vram_man = ttm_manager_type(bdev, TTM_PL_VRAM);
+	gtt_man = ttm_manager_type(bdev, TTM_PL_TT);
+
+	ttm_resource_manager_create_debugfs(vram_man, root, "vram_mm");
+	ttm_resource_manager_create_debugfs(gtt_man, root, "gtt_mm");
+}
diff --git a/drivers/gpu/drm/loongson/lsdc_ttm.h b/drivers/gpu/drm/loongson/lsdc_ttm.h
new file mode 100644
index 000000000..843e14750
--- /dev/null
+++ b/drivers/gpu/drm/loongson/lsdc_ttm.h
@@ -0,0 +1,99 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2023 Loongson Technology Corporation Limited
+ */
+
+#ifndef __LSDC_TTM_H__
+#define __LSDC_TTM_H__
+
+#include <linux/container_of.h>
+#include <linux/iosys-map.h>
+#include <linux/list.h>
+
+#include <drm/drm_gem.h>
+#include <drm/ttm/ttm_bo.h>
+#include <drm/ttm/ttm_placement.h>
+#include <drm/ttm/ttm_range_manager.h>
+#include <drm/ttm/ttm_tt.h>
+
+#define LSDC_GEM_DOMAIN_SYSTEM          0x1
+#define LSDC_GEM_DOMAIN_GTT             0x2
+#define LSDC_GEM_DOMAIN_VRAM            0x4
+
+struct lsdc_bo {
+	struct ttm_buffer_object tbo;
+
+	/* Protected by gem.mutex */
+	struct list_head list;
+
+	struct iosys_map map;
+
+	unsigned int vmap_count;
+	/* cross device driver sharing reference count */
+	unsigned int sharing_count;
+
+	struct ttm_bo_kmap_obj kmap;
+	void *kptr;
+	bool is_iomem;
+
+	size_t size;
+
+	u32 initial_domain;
+
+	struct ttm_placement placement;
+	struct ttm_place placements[4];
+};
+
+static inline struct ttm_buffer_object *to_ttm_bo(struct drm_gem_object *gem)
+{
+	return container_of(gem, struct ttm_buffer_object, base);
+}
+
+static inline struct lsdc_bo *to_lsdc_bo(struct ttm_buffer_object *tbo)
+{
+	return container_of(tbo, struct lsdc_bo, tbo);
+}
+
+static inline struct lsdc_bo *gem_to_lsdc_bo(struct drm_gem_object *gem)
+{
+	return container_of(gem, struct lsdc_bo, tbo.base);
+}
+
+const char *lsdc_mem_type_to_str(uint32_t mem_type);
+const char *lsdc_domain_to_str(u32 domain);
+
+struct lsdc_bo *lsdc_bo_create(struct drm_device *ddev,
+			       u32 domain,
+			       size_t size,
+			       bool kernel,
+			       struct sg_table *sg,
+			       struct dma_resv *resv);
+
+struct lsdc_bo *lsdc_bo_create_kernel_pinned(struct drm_device *ddev,
+					     u32 domain,
+					     size_t size);
+
+void lsdc_bo_free_kernel_pinned(struct lsdc_bo *lbo);
+
+int lsdc_bo_reserve(struct lsdc_bo *lbo);
+void lsdc_bo_unreserve(struct lsdc_bo *lbo);
+
+int lsdc_bo_pin(struct lsdc_bo *lbo, u32 domain, u64 *gpu_addr);
+void lsdc_bo_unpin(struct lsdc_bo *lbo);
+
+void lsdc_bo_ref(struct lsdc_bo *lbo);
+void lsdc_bo_unref(struct lsdc_bo *lbo);
+
+u64 lsdc_bo_gpu_offset(struct lsdc_bo *lbo);
+size_t lsdc_bo_size(struct lsdc_bo *lbo);
+
+int lsdc_bo_kmap(struct lsdc_bo *lbo);
+void lsdc_bo_kunmap(struct lsdc_bo *lbo);
+void lsdc_bo_clear(struct lsdc_bo *lbo);
+
+int lsdc_bo_evict_vram(struct drm_device *ddev);
+
+int lsdc_ttm_init(struct lsdc_device *ldev);
+void lsdc_ttm_debugfs_init(struct lsdc_device *ldev);
+
+#endif
-- 
cgit v1.3.1