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authorLinus Torvalds <torvalds@linux-foundation.org>2026-08-19 10:09:22 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2026-08-19 10:09:22 -0700
commitf4cdf7ca9a1fdcca413157df19753f388a5a224e (patch)
tree60a31895b2446cd7fa27514e8c2843534a0de0da /drivers/gpu/host1x/mipi.c
downloadlinux-stable-f4cdf7ca9a1fdcca413157df19753f388a5a224e.tar.gz
linux-stable-f4cdf7ca9a1fdcca413157df19753f388a5a224e.zip
Merge tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-mediagrafted
Pull media updates from Mauro Carvalho Chehab: - v4l2-core: added ISP statistics support and per-block validation - v4l2-core: Allow unknown HDR10 white point and luminance - New camera sensors: Sony IMX678 and IMX471m, Himax HM1092 IR sensor - New codec: Milos: VPU v2.0 codec support - isp driver: gained support for Dreamchip RPPX1 ISP framework - vsp1 driver: gained support for RZ/T2H and RZ/N2H - Novalake driver: gained CVS support for new NVL hardware - dvb-core: fix feed leak on failed DMX_ADD_PID - several driver fixes, cleanups and minor improvements * tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (308 commits) media: ipu-bridge: check all DMI entries when overriding sensor rotation media: v4l2-async: avoid deleting unlinked ASC entry on link error media: rzg2l-cru: Align bytesperline to hardware DMA stride requirement media: intel/ipu6: fix async notifier cleanup leak on parse error media: staging/ipu7: fix async notifier UAF on probe error path media: amd: isp4: fix self-deadlock in isp4sd_pwron_and_init() error path media: amd: isp4: release partial allocations in isp4if_alloc_fw_gpumem() media: rcar-isp: Fix VSPX reference leaks media: rcar-isp: Release ISPCORE resources media: i2c: imx415: Release runtime PM reference on VBLANK error media: i2c: imx415: Return test pattern write errors media: renesas: vsp1: Declare index variables in for loop statement media: renesas: vsp1: Make reset control optional to support platforms without a reset line media: dt-bindings: media: renesas,vsp1: Document RZ/T2H and RZ/N2H SoCs media: dt-bindings: media: renesas,fcp: Document RZ/T2H and RZ/N2H SoCs media: nxp: imx8-isi: Add additional 32-bit RGB format support media: nxp: imx8-isi: Add 16-bit raw Bayer format support media: nxp: imx8-isi: Implement per-stream reference counting for multiplexed streams media: nxp: imx8-isi: Use BIT_ULL() for 64-bit stream masks media: nxp: imx8-isi: Correct color map between V4L2 and ISI ...
Diffstat (limited to 'drivers/gpu/host1x/mipi.c')
-rw-r--r--drivers/gpu/host1x/mipi.c195
1 files changed, 195 insertions, 0 deletions
diff --git a/drivers/gpu/host1x/mipi.c b/drivers/gpu/host1x/mipi.c
new file mode 100644
index 000000000..988681423
--- /dev/null
+++ b/drivers/gpu/host1x/mipi.c
@@ -0,0 +1,195 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2013 NVIDIA Corporation
+ * Copyright (C) 2025 Svyatoslav Ryhel <clamor95@gmail.com>
+ */
+
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/tegra-mipi-cal.h>
+
+/* only need to support one provider */
+static struct {
+ struct device_node *np;
+ const struct tegra_mipi_ops *ops;
+} provider;
+
+/**
+ * tegra_mipi_enable - Enable the Tegra MIPI calibration device.
+ * @device: Handle to the Tegra MIPI calibration device.
+ *
+ * This calls the enable sequence for the Tegra MIPI calibration device.
+ *
+ * Returns 0 on success or a negative error code on failure.
+ */
+int tegra_mipi_enable(struct tegra_mipi_device *device)
+{
+ if (device->ops->enable)
+ return device->ops->enable(device);
+
+ return 0;
+}
+EXPORT_SYMBOL(tegra_mipi_enable);
+
+/**
+ * tegra_mipi_disable - Disable the Tegra MIPI calibration device.
+ * @device: Handle to the Tegra MIPI calibration device.
+ *
+ * This calls the disable sequence for the Tegra MIPI calibration device.
+ *
+ * Returns 0 on success or a negative error code on failure.
+ */
+int tegra_mipi_disable(struct tegra_mipi_device *device)
+{
+ if (device->ops->disable)
+ return device->ops->disable(device);
+
+ return 0;
+}
+EXPORT_SYMBOL(tegra_mipi_disable);
+
+/**
+ * tegra_mipi_start_calibration - Start the Tegra MIPI calibration sequence.
+ * @device: Handle to the Tegra MIPI calibration device.
+ *
+ * This initiates the calibration of CSI/DSI interfaces via the Tegra MIPI
+ * calibration device.
+ *
+ * Returns 0 on success or a negative error code on failure.
+ */
+int tegra_mipi_start_calibration(struct tegra_mipi_device *device)
+{
+ if (device->ops->start_calibration)
+ return device->ops->start_calibration(device);
+
+ return 0;
+}
+EXPORT_SYMBOL(tegra_mipi_start_calibration);
+
+/**
+ * tegra_mipi_finish_calibration - Finish the Tegra MIPI calibration sequence.
+ * @device: Handle to the Tegra MIPI calibration device.
+ *
+ * This completes the calibration of CSI/DSI interfaces via the Tegra MIPI
+ * calibration device.
+ *
+ * Returns 0 on success or a negative error code on failure.
+ */
+int tegra_mipi_finish_calibration(struct tegra_mipi_device *device)
+{
+ if (device->ops->finish_calibration)
+ return device->ops->finish_calibration(device);
+
+ return 0;
+}
+EXPORT_SYMBOL(tegra_mipi_finish_calibration);
+
+/**
+ * tegra_mipi_request - Request a Tegra MIPI calibration device.
+ * @device: Handle of the device requesting the MIPI calibration function.
+ * @np: Device node pointer of the device requesting the MIPI calibration
+ * function.
+ *
+ * This function requests a reference to a Tegra MIPI calibration device.
+ *
+ * Returns a pointer to the Tegra MIPI calibration device on success,
+ * or an ERR_PTR-encoded error code on failure.
+ */
+struct tegra_mipi_device *tegra_mipi_request(struct device *device,
+ struct device_node *np)
+{
+ struct tegra_mipi_device *mipidev;
+ struct of_phandle_args args;
+ int err;
+
+ err = of_parse_phandle_with_args(np, "nvidia,mipi-calibrate",
+ "#nvidia,mipi-calibrate-cells", 0,
+ &args);
+ if (err < 0)
+ return ERR_PTR(err);
+
+ if (provider.np != args.np) {
+ err = -ENODEV;
+ goto out;
+ }
+
+ mipidev = kzalloc_obj(*mipidev);
+ if (!mipidev) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ mipidev->pdev = of_find_device_by_node(args.np);
+ if (!mipidev->pdev) {
+ err = -ENODEV;
+ goto free;
+ }
+
+ of_node_put(args.np);
+
+ mipidev->ops = provider.ops;
+ mipidev->pads = args.args[0];
+
+ return mipidev;
+
+free:
+ kfree(mipidev);
+out:
+ of_node_put(args.np);
+ return ERR_PTR(err);
+}
+EXPORT_SYMBOL(tegra_mipi_request);
+
+/**
+ * tegra_mipi_free - Free a Tegra MIPI calibration device.
+ * @mipidev: Handle to the Tegra MIPI calibration device.
+ *
+ * This function releases a reference to a Tegra MIPI calibration device
+ * previously requested by tegra_mipi_request().
+ */
+void tegra_mipi_free(struct tegra_mipi_device *mipidev)
+{
+ platform_device_put(mipidev->pdev);
+ kfree(mipidev);
+}
+EXPORT_SYMBOL(tegra_mipi_free);
+
+static void tegra_mipi_remove_provider(void *data)
+{
+ provider.np = NULL;
+ provider.ops = NULL;
+}
+
+/**
+ * devm_tegra_mipi_add_provider - Managed registration of a Tegra MIPI
+ * calibration function provider.
+ * @device: Handle to the device providing the MIPI calibration function.
+ * @np: Device node pointer of the device providing the MIPI calibration
+ * function.
+ * @ops: Operations supported by the MIPI calibration device.
+ *
+ * This registers a device that provides MIPI calibration functions.
+ * For Tegra20 and Tegra30, this is the CSI block, while Tegra114 and
+ * newer SoC generations have a dedicated hardware block for these
+ * functions.
+ *
+ * Returns 0 on success or a negative error code on failure.
+ */
+int devm_tegra_mipi_add_provider(struct device *device, struct device_node *np,
+ const struct tegra_mipi_ops *ops)
+{
+ if (provider.np)
+ return -EBUSY;
+
+ provider.np = np;
+ provider.ops = ops;
+
+ return devm_add_action_or_reset(device, tegra_mipi_remove_provider, NULL);
+}
+EXPORT_SYMBOL(devm_tegra_mipi_add_provider);