[Bug 93804] New: mpv opengl vo with vaapi decode renders OK with DRI2 but not DRI3

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93804

            Bug ID: 93804
           Summary: mpv opengl vo with vaapi decode renders OK with DRI2
                    but not DRI3
           Product: xorg
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/AMDgpu
          Assignee: xorg-driver-ati at lists.x.org
          Reporter: adf.lists at gmail.com
        QA Contact: xorg-team at lists.x.org

Been testing some things with mpv recently and notice that when DRI3 is enabled
it doesn't render when using vaapi decode + opengl vo eg.

mpv --hwdec=vaapi --vo=opengl ....

works with dri2 but not dri3, I just get a static frame of GPU mem, the player
behaves as if nothing is wrong.

I am using R9285 gits mesa/llvm and release X with Server 1.18.0 (also tried
1.18.0 git branch). Git xf86-video-amdgpu.

There is no difference between the output of R600_DEBUG=vs,ps,fs or mpv -v
between working and not working.

mpv --vo=opengl works fine with anything other than --vo=vaapi.

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