Bug 70146

Summary: UVD performance regression on linux-3.12-rc
Product: DRI Reporter: Johannes Hirte <johannes.hirte>
Component: DRM/RadeonAssignee: Default DRI bug account <dri-devel>
Status: RESOLVED FIXED QA Contact:
Severity: normal    
Priority: medium    
Version: DRI git   
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: i915 features:

Description Johannes Hirte 2013-10-04 17:07:37 UTC 
When playing h.264 videos with UVD support, the video is sluggish and mplayer shows the "Your system is too SLOW to play this!" message after a few seconds.

git bisect points me to:

ce3537d57196dfc7094755532e1ffc1af133ca5f is the first bad commit
commit ce3537d57196dfc7094755532e1ffc1af133ca5f
Author: Alex Deucher <alexander.deucher@amd.com>
Date:   Wed Jul 24 12:12:49 2013 -0400

    drm/radeon/dpm: use multiple UVD power states (v3)
    
    Use the UVD handle information to determine which
    which power states to select when using UVD.  For
    example, decoding a single SD stream requires much
    lower clocks than multiple HD streams.
    
    v2: switch to a cleaner dpm/uvd interface
    v3: change the uvd power state while streams
    are active if need be
    
    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

:040000 040000 d8c5afc839fccfe228d8880817bee5b2a35d0578 af38b8261405bd4212f856499520a50476b50b43 M      drivers

GPU is a Mobility Radeon HD5470
Comment 1 Rafał Miłecki 2013-10-04 18:15:56 UTC 
Fix (well, workaround) was already posted:
http://www.spinics.net/lists/dri-devel/msg46099.html
[PATCH] drm/radeon/dpm: disable multiple UVD states
Comment 2 Johannes Hirte 2013-10-04 19:24:16 UTC 
(In reply to comment #1)
> Fix (well, workaround) was already posted:
> http://www.spinics.net/lists/dri-devel/msg46099.html
> [PATCH] drm/radeon/dpm: disable multiple UVD states

Thanks for info. So this should be closed as fixed (for now).

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