[Bug 86781] enabling glamor causes jumpy VDPAU playback with 2x framerate DI

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=86781

            Bug ID: 86781
           Summary: enabling glamor causes jumpy VDPAU playback with 2x
                    framerate DI
           Product: Mesa
           Version: 10.3
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: warpme at o2.pl

VDPAU playback of interlaced content starts to be jumpy when user enables
glamor and DI is set to 2x.
Issue is seen under MythTV. Playback log reports:

2014-11-13 13:47:01.013753 I Player(1): Video is 3.18365 frames behind audio
(too slow), dropping frame to catch up.
2014-11-13 13:47:01.013783 I AOBase: Pause 1
2014-11-13 13:47:01.014047 I Player(1): Video is 3.45023 frames behind audio
(too slow), dropping frame to catch up.
2014-11-13 13:47:01.014064 I AOBase: Pause 1
2014-11-13 13:47:01.014171 I Player(1): Video is 3.40015 frames behind audio
(too slow), dropping frame to catch up.
2014-11-13 13:47:01.014188 I AOBase: Pause 1
2014-11-13 13:47:01.014286 I Player(1): Video is 3.1126 frames behind audio
(too slow), dropping frame to catch up. 

2x DI problem manifests only with enabled glamor. On Brazos with EXA, 2x DI
works perfect while enabling glamor triggers 2x DI issue. 
On Kabini issue is always present as Kabini mandatory requires glamor. 

Tests were done with mesa 10.2.8/10.3.3 and xserver 1.16.1/1.16.2

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