kernel/linux.git/drivers/gpu/drm/mediatek/Makefile, branch master

drm/mediatek: Set dedicated DMA device and drop custom GEM callbacks

2026-03-23T05:23:29+00:00

In commit 9b54a32c7c6a ("drm/mediatek: mtk_gem: Partial refactor and use drm_gem_dma_object") the MediaTek DRM driver was refactored to use drm_gem_dma_object, but custom callbacks were still needed to deal with using the first device of the pipeline as the DMA device, instead of the MMSYS device that the DRM driver binds to. Turns out there is already partial support for dedicated DMA devices in the DRM subsystem for PRIME imports. The preceding patches add support for dedicated DMA devices to the GEM DMA helpers. This allows us to just set the dedicated DMA device for the DRM device, and drop all the custom GEM callbacks. Also drop the .dma_dev field from the driver private data as it is no longer needed. There are slight differences in the mmap helper: the VM_DONTDUMP and VM_IO flags are no longer set. Both were lifted from drm_gem_mmap_obj(). VM_IO probably doesn't make sense since the buffer is allocated using dma_alloc_attrs(). Reviewed-by: Thomas Zimmermann Acked-by: Chun-Kuang Hu Reviewed-by: AngeloGioacchino Del Regno Link: https://patch.msgid.link/20260311094929.3393338-4-wenst@chromium.org Signed-off-by: Chen-Yu Tsai

drm/mediatek: Introduce HDMI/DDC v2 for MT8195/MT8188

2025-11-17T15:04:41+00:00

Add support for the newer HDMI-TX (Encoder) v2 and DDC v2 IPs found in MediaTek's MT8195, MT8188 SoC and their variants, and including support for display modes up to 4k60 and for HDMI Audio, as per the HDMI 2.0 spec. HDCP and CEC functionalities are also supported by this hardware, but are not included in this commit and that also poses a slight difference between the V2 and V1 controllers in how they handle Hotplug Detection (HPD). While the v1 controller was using the CEC controller to check HDMI cable connection and disconnection, in this driver the v2 one does not. This is due to the fact that on parts with v2 designs, like the MT8195 SoC, there is one CEC controller shared between the HDMI Transmitter (HDMI-TX) and Receiver (HDMI-RX): before eventually adding support to use the CEC HW to wake up the HDMI controllers it is necessary to have support for one TX, one RX *and* for both at the same time. Reviewed-by: CK Hu Signed-off-by: AngeloGioacchino Del Regno Signed-off-by: Louis-Alexis Eyraud Link: https://patchwork.kernel.org/project/linux-mediatek/patch/20251023-mediatek-drm-hdmi-v2-v11-9-7873ec4a1edf@collabora.com/ Signed-off-by: Chun-Kuang Hu ddc_v2 ddc_v2

drm/mediatek: mtk_hdmi: Split driver and add common probe function

2025-11-17T15:04:37+00:00

In preparation for adding a new driver for the HDMI TX v2 IP, split out the functions that will be common between the already present mtk_hdmi (v1) driver and the new one. Since the probe flow for both drivers is 90% similar, add a common probe function that will be called from each driver's .probe() callback, avoiding lots of code duplication. Reviewed-by: CK Hu Signed-off-by: AngeloGioacchino Del Regno Signed-off-by: Louis-Alexis Eyraud Link: https://patchwork.kernel.org/project/linux-mediatek/patch/20251023-mediatek-drm-hdmi-v2-v11-4-7873ec4a1edf@collabora.com/ Signed-off-by: Chun-Kuang Hu

drm/mediatek: mtk_hdmi_ddc: Switch to register as module_platform_driver

2025-04-21T12:27:55+00:00

In preparation for adding a driver for the new HDMIv2 IP, and before splitting out the common bits from the HDMI driver, change the mtk_hdmi_ddc driver from being registered from the HDMI driver itself to be a module_platform_driver of its own. With this change, there are no more users of the mtk_hdmi.h header so, while at it, also remove it. Reviewed-by: Alexandre Mergnat Reviewed-by: CK Hu Signed-off-by: AngeloGioacchino Del Regno Link: https://patchwork.kernel.org/project/dri-devel/patch/20250415104321.51149-6-angelogioacchino.delregno@collabora.com/ Signed-off-by: Chun-Kuang Hu

drm/mediatek: mtk_cec: Switch to register as module_platform_driver

2025-04-17T23:26:14+00:00

In preparation for adding a driver for the new HDMIv2 IP, and before splitting out the common bits from the HDMI driver, change the mtk_cec driver from being registered from the mtk_hdmi driver itself to be a module_platform_driver of its own. Besides being a cleanup, this also allows build flexibility by allowing to compile the CECv1 driver only when needed (for example, this is not needed nor used in HDMIv2 configurations). Reviewed-by: Alexandre Mergnat Reviewed-by: CK Hu Signed-off-by: AngeloGioacchino Del Regno Link: https://patchwork.kernel.org/project/dri-devel/patch/20250415104321.51149-5-angelogioacchino.delregno@collabora.com/ Signed-off-by: Chun-Kuang Hu

drm/mediatek: Rename files "mtk_drm_gem.c" to "mtk_gem.c"

2024-04-01T15:35:43+00:00

Rename files mtk_drm_gem.c to mtk_gem.c. Reviewed-by: AngeloGioacchino Del Regno Reviewed-by: CK Hu Signed-off-by: Hsiao Chien Sung Link: https://patchwork.kernel.org/project/dri-devel/patch/20240322091232.26387-14-shawn.sung@mediatek.com/ Signed-off-by: Chun-Kuang Hu

drm/mediatek: Rename files "mtk_drm_plane.c" to "mtk_plane.c"

2024-04-01T15:32:11+00:00

Rename files mtk_drm_plane.c to mtk_plane.c and modify the Makefile accordingly. Reviewed-by: AngeloGioacchino Del Regno Reviewed-by: CK Hu Signed-off-by: Hsiao Chien Sung Link: https://patchwork.kernel.org/project/dri-devel/patch/20240322091232.26387-12-shawn.sung@mediatek.com/ Signed-off-by: Chun-Kuang Hu

drm/mediatek: Rename files "mtk_drm_ddp_comp.c" to "mtk_ddp_comp.c"

2024-04-01T15:28:38+00:00

Rename files mtk_drm_ddp_comp.c to mtk_ddp_comp.c and modify the Makefile accordingly. Reviewed-by: AngeloGioacchino Del Regno Reviewed-by: CK Hu Signed-off-by: Hsiao Chien Sung Link: https://patchwork.kernel.org/project/dri-devel/patch/20240322091232.26387-10-shawn.sung@mediatek.com/ Signed-off-by: Chun-Kuang Hu

drm/mediatek: Rename files "mtk_drm_crtc.c" to "mtk_crtc.c"

2024-04-01T15:24:47+00:00

Rename files mtk_drm_crtc.c to mtk_crtc.c and modify the Makefile accordingly. Reviewed-by: AngeloGioacchino Del Regno Reviewed-by: CK Hu Signed-off-by: Hsiao Chien Sung Link: https://patchwork.kernel.org/project/dri-devel/patch/20240322091232.26387-8-shawn.sung@mediatek.com/ Signed-off-by: Chun-Kuang Hu

drm/mediatek: Support MT8188 Padding in display driver

2023-12-14T14:45:36+00:00

Padding is a new display module on MT8188, it provides ability to add pixels to width and height of a layer with specified colors. Due to hardware design, Mixer in VDOSYS1 requires width of a layer to be 2-pixel-align, or 4-pixel-align when ETHDR is enabled, we need Padding to deal with odd width. Reviewed-by: CK Hu Reviewed-by: AngeloGioacchino Del Regno Signed-off-by: Hsiao Chien Sung Link: https://patchwork.kernel.org/project/dri-devel/patch/20231214055847.4936-19-shawn.sung@mediatek.com/ Signed-off-by: Chun-Kuang Hu