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read-only mirror of https://gitlab.freedesktop.org/mesa/mesa
de36799f15
This is the analogous of https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9490 but for r600. Discoloration of NV12 video frames was observed in Chrome/ChromeOS and the problem was tracked down to the fact that Mesa was following the PIPE_FORMAT_R8_G8B8_420_UNORM/lower_yuv_external() path. The symptom is that (for an unknown reason) the YUV-to-RGB conversion is using the value of Y as the value of Y, U, and V. So, for example, if the input value is YUV = (50, 120, 130), then what actually gets converted to RGB is YUV = (50, 50, 50). Considering that PIPE_FORMAT_R8_G8B8_420_UNORM was introduced for freedreno (https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6693) and it is already being reported as unsupported for radeonsi, it's reasonable to assume that GPUs targeted by r600 don't support this path either. Note: I tested this patch with an AMD Palm device which follows the evergreen_is_format_supported() path. I did not have access to a device to test the r600_is_format_supported() path. v2: Changed >= 2 to > 1. Fixes: |
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`Mesa <https://mesa3d.org>`_ - The 3D Graphics Library ====================================================== Source ------ This repository lives at https://gitlab.freedesktop.org/mesa/mesa. Other repositories are likely forks, and code found there is not supported. Build & install --------------- You can find more information in our documentation (`docs/install.rst <https://mesa3d.org/install.html>`_), but the recommended way is to use Meson (`docs/meson.rst <https://mesa3d.org/meson.html>`_): .. code-block:: sh $ mkdir build $ cd build $ meson .. $ sudo ninja install Support ------- Many Mesa devs hang on IRC; if you're not sure which channel is appropriate, you should ask your question on `OFTC's #dri-devel <irc://irc.oftc.net/dri-devel>`_, someone will redirect you if necessary. Remember that not everyone is in the same timezone as you, so it might take a while before someone qualified sees your question. To figure out who you're talking to, or which nick to ping for your question, check out `Who's Who on IRC <https://dri.freedesktop.org/wiki/WhosWho/>`_. The next best option is to ask your question in an email to the mailing lists: `mesa-dev\@lists.freedesktop.org <https://lists.freedesktop.org/mailman/listinfo/mesa-dev>`_ Bug reports ----------- If you think something isn't working properly, please file a bug report (`docs/bugs.rst <https://mesa3d.org/bugs.html>`_). Contributing ------------ Contributions are welcome, and step-by-step instructions can be found in our documentation (`docs/submittingpatches.rst <https://mesa3d.org/submittingpatches.html>`_). Note that Mesa uses gitlab for patches submission, review and discussions.