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authorLinus Torvalds <torvalds@linux-foundation.org>2026-08-24 08:46:03 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2026-08-24 08:46:03 -0700
commitcf9610f9116d55c5a66ef9f1faecacabd93a9322 (patch)
tree757a3d280760c654767631cab5ad8af2d86d1848 /include/drm/drm_cache.h
downloadlinux-stable-cf9610f9116d55c5a66ef9f1faecacabd93a9322.tar.gz
linux-stable-cf9610f9116d55c5a66ef9f1faecacabd93a9322.zip
Merge tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrlgrafted
Pull pin control updates from Linus Walleij: "Core changes: - Use the non-blocking mux_state_try_select() in the generic MUX pin control back-end - Free pin maps on pinctrl_generic_to_map() failure in the core helpers New hardware pin control: - Qualcomm Maili TLMM SoC, PMG1110 PMIC, and Eliza LPASS LPI TLMM SoC (this is for the low power audio, LPASS = Low Power Audio SubSystem portions) - Upboard support on top of the Intel pin controller - Apple T6030 and T6031 support (just compatible strings) - Samsung Exynos 8855 SoC - Mediatek MT6858 SoC - Rockchip RK3308B and RV1106 SoCs - Airoha EN7523 and AN7563 SoCs Improvements: - Qualcomm TLMM GPIOs are unconditionally marked as wakeup capable - Qualcomm improvements on top of the Qualcomm PDC (power domain controller) irqchip improvements from tglx:s tree - Qualcomm IPQ806x and IPQ9650 non-urgent pin grop fixups - The NPCM8xx driver has been put into shape fixing many pin and group definitions - Some non-urgent Tegra 264 pin assignments are fixed up - Some non-urgent fixups to Airoha AN7581 and AN7583 registers and pin assignments, missing features etc" * tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (130 commits) dt-bindings: pinctrl: Convert TI DA850 pupd to DT schema pinctrl: meson: sync some modify from A4 pinctrl: meson: a4: Add input enable pin configuration pinctrl: realtek: rtd1625: remove unused group name spdif_sel pinctrl: realtek: rtd1625: fix base_bit for VE4 GPIO 13 dt-bindings: pinctrl: microchip,pic32mzda-pinctrl: Convert to DT schema Revert "Merge branch 'ib-rsk7204' into devel" pinctrl: rockchip: Add RV1106 pinctrl support dt-bindings: pinctrl: rockchip: Add RV1106 compatible pinctrl: rockchip: Decode drive strength in the get function pinctrl: fix PINCTRL_GENERIC_MUX not always being selectable pinctrl: airoha: add support of an7563 SoC dt-bindings: pinctrl: airoha: add support of an7563 pin controller pinctrl: airoha: try to find chip scu node by phandle first pinctrl: airoha: add support of en7523 SoC dt-bindings: pinctrl: airoha: add support of en7523 pin controller pinctrl: airoha: an7583: add support for olt pinmux pinctrl: airoha: an7583: add support for pon_alt pinmux pinctrl: airoha: an7583: add support for npu_uart pinmux dt-bindings: pinctrl: airoha: an7583: add missed features ...
Diffstat (limited to 'include/drm/drm_cache.h')
-rw-r--r--include/drm/drm_cache.h88
1 files changed, 88 insertions, 0 deletions
diff --git a/include/drm/drm_cache.h b/include/drm/drm_cache.h
new file mode 100644
index 000000000..08e0e3ffa
--- /dev/null
+++ b/include/drm/drm_cache.h
@@ -0,0 +1,88 @@
+/**************************************************************************
+ *
+ * Copyright 2009 Red Hat Inc.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ *
+ **************************************************************************/
+/*
+ * Authors:
+ * Dave Airlie <airlied@redhat.com>
+ */
+
+#ifndef _DRM_CACHE_H_
+#define _DRM_CACHE_H_
+
+#include <linux/scatterlist.h>
+
+struct iosys_map;
+
+void drm_clflush_pages(struct page *pages[], unsigned long num_pages);
+void drm_clflush_sg(struct sg_table *st);
+void drm_clflush_virt_range(void *addr, unsigned long length);
+bool drm_need_swiotlb(int dma_bits);
+
+
+static inline bool drm_arch_can_wc_memory(void)
+{
+#if defined(CONFIG_PPC) && !defined(CONFIG_NOT_COHERENT_CACHE)
+ return false;
+#elif defined(CONFIG_MIPS) && defined(CONFIG_CPU_LOONGSON64)
+ return false;
+#elif defined(CONFIG_ARM) || defined(CONFIG_ARM64)
+ /*
+ * The DRM driver stack is designed to work with cache coherent devices
+ * only, but permits an optimization to be enabled in some cases, where
+ * for some buffers, both the CPU and the GPU use uncached mappings,
+ * removing the need for DMA snooping and allocation in the CPU caches.
+ *
+ * The use of uncached GPU mappings relies on the correct implementation
+ * of the PCIe NoSnoop TLP attribute by the platform, otherwise the GPU
+ * will use cached mappings nonetheless. On x86 platforms, this does not
+ * seem to matter, as uncached CPU mappings will snoop the caches in any
+ * case. However, on ARM and arm64, enabling this optimization on a
+ * platform where NoSnoop is ignored results in loss of coherency, which
+ * breaks correct operation of the device. Since we have no way of
+ * detecting whether NoSnoop works or not, just disable this
+ * optimization entirely for ARM and arm64.
+ */
+ return false;
+#elif defined(CONFIG_LOONGARCH)
+ /*
+ * LoongArch maintains cache coherency in hardware, but its WUC attribute
+ * (Weak-ordered UnCached, which is similar to WC) is out of the scope of
+ * cache coherency machanism. This means WUC can only used for write-only
+ * memory regions.
+ */
+ return false;
+#else
+ return true;
+#endif
+}
+
+void drm_memcpy_init_early(void);
+
+void drm_memcpy_from_wc(struct iosys_map *dst,
+ const struct iosys_map *src,
+ unsigned long len);
+#endif