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1be5f26cfb
Gen11 stores the fast clear color in an "indirect clear buffer", as a packed pixel value. Gen9 hardware stores it as a float or integer value, which is interpreted via the format. We were trying to store that in a buffer, for similarity with Icelake, and MI_COPY_MEM_MEM it from there to the actual SURFACE_STATE bytes where it's stored. This unfortunately doesn't work for blorp_copy(), which does bit-for-bit copies, and overrides the format to a CCS-compatible UINT format. This causes the clear color to be interpreted in the overridden format. Normally, we provide the clear color on the CPU, and blorp_blit.c:2611 converts it to a packed pixel value in the original format, then unpacks it in the overridden format, so the clear color we use expands to the bits we originally desired. However, BLORP doesn't support this pack/unpack with an indirect clear buffer, as it would need to do the math on the GPU. On Gen11+, it isn't necessary, as the hardware does the right thing. This patch changes Gen9 to stop using an indirect clear buffer and simply do PIPE_CONTROLs with post-sync write immediate operations to store the new color over the surface states for regular drawing. BLORP continues streaming out surface states, and handles fast clear colors on the CPU. 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.html <https://mesa3d.org/install.html>`_), but the recommended way is to use Meson (`docs/meson.html <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 `Freenode's #dri-devel <irc://chat.freenode.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.html <https://mesa3d.org/bugs.html>`_). Contributing ------------ Contributions are welcome, and step-by-step instructions can be found in our documentation (`docs/submittingpatches.html <https://mesa3d.org/submittingpatches.html>`_). Note that Mesa uses email mailing-lists for patches submission, review and discussions.