Connor Abbott
dbc4a2e30b
Starting with a750, the ALWAYS_ON counter is initialized from a loadable counter in CX power domain, which is never turned off except during a GPU reset. This means that timestamps should always be monotonic except if the GPU resets, in which case subsequent submits should return DEVICE_LOST anyway. Thus it should be good enough to satisfy the Vulkan requirement that vkCmdWriteTimestamp is monotonic. kgsl tries to synchronize the CX counter to the CPU counter, and additionally adds a synchronization ioctl to improve the accuracy. I'm not sure whether the former is really useful for us, but the latter should eventually be implemented in drm/msm. However for now we can expose the extension without any kernel support. Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31100>
`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://docs.mesa3d.org/install.html>`_), but the recommended way is to use Meson (`docs/meson.rst <https://docs.mesa3d.org/meson.html>`_): .. code-block:: sh $ meson setup build $ ninja -C build/ $ sudo ninja -C build/ 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://docs.mesa3d.org/bugs.html>`_). Contributing ------------ Contributions are welcome, and step-by-step instructions can be found in our documentation (`docs/submittingpatches.rst <https://docs.mesa3d.org/submittingpatches.html>`_). Note that Mesa uses gitlab for patches submission, review and discussions.