kernel/linux.git/drivers/gpu/drm/mediatek, branch v7.1.12

drm/mediatek: mtk_dsi: Enable HS clock only at pre-enable

2026-08-23T12:29:29+00:00

[ Upstream commit 3e191eddbdcb8bf7beb1e9b58209073bd5450719 ] Commit 76255024cadb ("drm/mediatek: mtk_dsi: enable hs clock during pre-enable") rightfully moves the HS clock enablement to before atomic_enable(), but it's moving it to mtk_dsi_poweron(), which is not only called in the .atomic_pre_enable() callback for the DRM bridge, but also in the MediaTek DRM's .ddp_start() callback, which happens way before the bridge ones. The HS clock enablement should be done at just the right time, otherwise some bridge chips (or some Display Driver ICs) may not work correctly: this is seen at least with a Parade DSI to eDP bridge (PS8640) on the MT8173 Elm Chromebook. This resolves a regression that was seen on the aforementioned machine, which was happening only after a suspend-resume cycle. Cc: # 7.1.x Fixes: 76255024cadb ("drm/mediatek: mtk_dsi: enable hs clock during pre-enable") Signed-off-by: AngeloGioacchino Del Regno Tested-by: Adam Thiede Reviewed-by: CK Hu Link: https://patchwork.kernel.org/project/linux-mediatek/patch/20260728153145.578404-1-angelogioacchino.delregno@collabora.com/ Signed-off-by: Chun-Kuang Hu Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

drm/mediatek: Convert legacy DRM logging to drm_* helpers in mtk_dsi.c

2026-08-23T12:29:28+00:00

[ Upstream commit c319b83e152181cc669a761695a9475510f5d3e5 ] Replace DRM_INFO(), DRM_WARN() and DRM_ERROR() calls in drivers/gpu/drm/mediatek/mtk_dsi.c with the corresponding drm_info(), drm_warn() and drm_err() helpers. The drm_*() logging helpers take a struct drm_device * argument, allowing the DRM core to prefix log messages with the correct device name and instance. This is required to correctly distinguish log messages on systems with multiple GPUs. This change aligns the radeon driver with the DRM TODO item: "Convert logging to drm_* functions with drm_device parameter". Signed-off-by: Abhishek Rajput Reviewed-by: CK Hu Link: https://patchwork.kernel.org/project/dri-devel/patch/20260420052008.5417-1-abhiraj21put@gmail.com/ Signed-off-by: Chun-Kuang Hu Stable-dep-of: 3e191eddbdcb ("drm/mediatek: mtk_dsi: Enable HS clock only at pre-enable") Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

drm/mediatek: ovl_adaptor: balance component registrations

2026-08-09T18:26:54+00:00

commit 533e3469a57996905cdb95f178e7efe38c21aeb2 upstream. The OVL adaptor registers both an aggregate driver for its child devices and a component for the main DRM aggregate. Probe currently ignores an error from registering the child aggregate and leaves that aggregate registered if registering the DRM component fails. The remove callback also leaves the DRM component registered. These imbalances can leave component framework entries referring to a device whose probe failed or whose driver has been detached. The aggregate unbind callback also fails to undo component_bind_all(), leaving its child components marked as bound when the aggregate is removed. Check the aggregate registration result, unwind it when the component registration fails, and unregister the component before the aggregate on remove. Keep runtime PM enabled until both framework registrations have been removed, and unbind all child components from the aggregate unbind callback. Fixes: 453c3364632a ("drm/mediatek: Add ovl_adaptor support for MT8195") Cc: stable@vger.kernel.org # 6.4+ Co-developed-by: Ijae Kim Signed-off-by: Ijae Kim Signed-off-by: Myeonghun Pak Reviewed-by: CK Hu Link: https://patchwork.kernel.org/project/linux-mediatek/patch/20260721152242.47138-1-mhun512@gmail.com/ Signed-off-by: Chun-Kuang Hu Signed-off-by: Greg Kroah-Hartman

drm/mediatek: mtk_hdmi: Fix DDC adapter double put in v2

2026-08-09T18:26:54+00:00

commit d19d8542808c3be5f4af849da6509e877b74d811 upstream. mtk_hdmi_common_probe() gets the DDC adapter with of_find_i2c_adapter_by_node() and registers a devm action to release the adapter device reference with put_device(). The HDMI v2 remove callback also calls i2c_put_adapter() on the same DDC adapter. This is not paired with of_find_i2c_adapter_by_node(): it drops the adapter device reference before the devm action drops it again, and it also puts a module reference that was never taken. Remove the extra i2c_put_adapter() call and drop the now-empty HDMI v2 remove callback. The common devm action releases the adapter device reference. Fixes: 8d0f79886273 ("drm/mediatek: Introduce HDMI/DDC v2 for MT8195/MT8188") Cc: stable@vger.kernel.org Reviewed-by: Johan Hovold Signed-off-by: Guangshuo Li Reviewed-by: CK Hu Link: https://patchwork.kernel.org/project/linux-mediatek/patch/20260713112957.884640-1-lgs201920130244@gmail.com/ Signed-off-by: Chun-Kuang Hu Signed-off-by: Greg Kroah-Hartman

drm/mediatek: Check CRTC state before freeing

2026-08-09T18:26:25+00:00

[ Upstream commit 233a4d3a39fc1585f5e271b2adab43c6af025ae0 ] mtk_crtc_reset() destroys the current CRTC state only when crtc->state is non-NULL, but it always converts crtc->state to struct mtk_crtc_state and passes the result to kfree(). When reset is called without an existing state, container_of(NULL, ...) does not produce NULL. Keep the mtk state free in the same crtc->state guard as the helper state destruction. This issue was found by a static analysis checker and confirmed by manual source review. Fixes: 2d267b81898e ("drm/mtk: Use __drm_atomic_helper_crtc_reset") Signed-off-by: Ruoyu Wang Reviewed-by: CK Hu Link: https://patchwork.kernel.org/project/linux-mediatek/patch/20260707150528.2270739-1-ruoyuw560@gmail.com/ Signed-off-by: Chun-Kuang Hu Signed-off-by: Sasha Levin

drm/mediatek: mtk_hdmi_ddc: Fix non-static global variable

2026-05-18T14:21:39+00:00

The struct 'mtk_hdmi_ddc_driver' is not used outside of the mtk_hdmi_ddc.c file, so make it static to silence sparse warning: ``` drivers/gpu/drm/mediatek/mtk_hdmi_ddc.c:331:24: sparse: warning: symbol 'mtk_hdmi_ddc_driver' was not declared. Should it be static? ``` Fixes: c241118b6216 ("drm/mediatek: mtk_hdmi_ddc: Switch to register as module_platform_driver") Signed-off-by: Louis-Alexis Eyraud Reviewed-by: CK Hu Link: https://patchwork.kernel.org/project/dri-devel/patch/20260429-mediatek-drm-fix-sparse-warnings-v1-4-d95c4d118b83@collabora.com/ Signed-off-by: Chun-Kuang Hu

drm/mediatek: mtk_cec: Fix non-static global variable

2026-05-18T14:19:18+00:00

The struct 'mtk_cec_driver' is not used outside of the mtk_cec.c file, so make it static to silence sparse warning: ``` drivers/gpu/drm/mediatek/mtk_cec.c:243:24: sparse: warning: symbol 'mtk_cec_driver' was not declared. Should it be static? ``` Fixes: 1e914a89ab7e ("drm/mediatek: mtk_cec: Switch to register as module_platform_driver") Signed-off-by: Louis-Alexis Eyraud Reviewed-by: CK Hu Link: https://patchwork.kernel.org/project/dri-devel/patch/20260429-mediatek-drm-fix-sparse-warnings-v1-3-d95c4d118b83@collabora.com/ Signed-off-by: Chun-Kuang Hu

drm/mediatek: mtk_hdmi_v2: Fix non-static global variable

2026-05-18T14:16:30+00:00

The struct 'mtk_hdmi_v2_clk_names' is not used outside of the mtk_hdmi_v2.c file, so make it static to silence sparse warning: ``` drivers/gpu/drm/mediatek/mtk_hdmi_v2.c:53:12: sparse: warning: symbol 'mtk_hdmi_v2_clk_names' was not declared. Should it be static? ``` Fixes: 8d0f79886273 ("drm/mediatek: Introduce HDMI/DDC v2 for MT8195/MT8188") Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202604132044.fcYjEcU8-lkp@intel.com/ Signed-off-by: Louis-Alexis Eyraud Reviewed-by: CK Hu Link: https://patchwork.kernel.org/project/dri-devel/patch/20260429-mediatek-drm-fix-sparse-warnings-v1-2-d95c4d118b83@collabora.com/ Signed-off-by: Chun-Kuang Hu

drm/mediatek: mtk_hdmi_ddc_v2: Fix non-static global variable

2026-05-18T14:15:21+00:00

The struct 'mtk_hdmi_ddc_v2_driver' is not used outside of the mtk_hdmi_ddc_v2.c file, so make it static to silence sparse warning: ``` drivers/gpu/drm/mediatek/mtk_hdmi_ddc_v2.c:392:24: sparse: warning: symbol 'mtk_hdmi_ddc_v2_driver' was not declared. Should it be static? ``` Fixes: 8d0f79886273 ("drm/mediatek: Introduce HDMI/DDC v2 for MT8195/MT8188") Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202604132044.fcYjEcU8-lkp@intel.com/ Signed-off-by: Louis-Alexis Eyraud Reviewed-by: CK Hu Link: https://patchwork.kernel.org/project/dri-devel/patch/20260429-mediatek-drm-fix-sparse-warnings-v1-1-d95c4d118b83@collabora.com/ Signed-off-by: Chun-Kuang Hu

BackMerge tag 'v7.0-rc6' into drm-next

2026-03-30T21:51:02+00:00

Linux 7.0-rc6 Requested by a few people on irc to resolve conflicts in other tress. Signed-off-by: Dave Airlie