Hi, Prior work towards this is/was: https://lore.kernel.org/dri-devel/20240115160554.720247-1-an...@yngvason.is/
I have slightly modified version of that, but still working on getting another driver (besides amd/i915) working with it. On Tue, Aug 26, 2025 at 02:39:59AM +0800, Shengyu Qu wrote: > Usage: > - X11: xrandr --output <output name> --set "pixel encoding" <encoding> > - Wayland: proptest -M amdgpu -D <card path> <connector ID> connector > <pixel encoding ID> <encoding (ID)> > - Kernel Param: amdgpu.pixel_encoding=<encoding> > or amdgpu.pixel_encoding=<monitor>:<encoding>,<monitor>:<encoding> > > Supported encodings are: "auto" (0) (Default and original behavior), "rgb" > (1), "ycbcr444" (2), "ycbcr422" (4), and "ycbcr420" (8). > > This patch series allow users to switch between pixel encodings, which is > specially important when auto gets it wrong (probably because of monitor's > manufacturer mistake) and needs user intervention. > > Changes since v1: > - Some cleanup and rebase > - Added YUV422 support > > Full discussion: > https://gitlab.freedesktop.org/drm/amd/-/issues/476#note_2628536 > > Original patch by Yassine Imounachen, current version is modified based on > this patch(was rebased by Rafael Carvalho): > https://lists.freedesktop.org/archives/amd-gfx/2024-October/116195.html > > Shengyu Qu (2): > drm/connector: Add "pixel_encoding" to switch between RGB & YUV color > output modes > drm/amdgpu: Add "pixel_encoding" DRM connector property support for > amdgpu > > drivers/gpu/drm/amd/amdgpu/amdgpu_display.c | 36 +++ > drivers/gpu/drm/amd/amdgpu/amdgpu_display.h | 3 + > drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h | 2 + > .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 273 +++++++++++++++++- > .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h | 1 + > drivers/gpu/drm/amd/display/dc/core/dc.c | 8 + > drivers/gpu/drm/amd/display/dc/dc_stream.h | 2 + > drivers/gpu/drm/drm_modes.c | 32 ++ > include/drm/drm_connector.h | 7 + > 9 files changed, 353 insertions(+), 11 deletions(-) > > -- > 2.43.0 >
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