Bug 104745

Summary: HEVC VDPAU decoding broken on RX 460 with UVD Firmware v1.130
Product: DRI Reporter: saunders.52
Component: DRM/AMDgpuAssignee: Default DRI bug account <dri-devel>
Status: RESOLVED MOVED QA Contact:
Severity: normal    
Priority: medium CC: saunders.52
Version: unspecified   
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
Reference image of the video glitch.
none
Software decoded version of the same timestamp in the file. none

Description saunders.52 2018-01-23 00:12:10 UTC 
Created attachment 136911 [details]
Reference image of the video glitch.

When using the new version of the Polaris11 UVD firmware uploaded on 1-19-18 in this commit: https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/commit/?id=2a713be25a44bd6cec90d8affc54b246a2ca9c7b on my AMD RX 460 4 GB graphics card, VDPAU decoding for HEVC/h.265 video is broken. The video will frequently glitch out (every 5-10 seconds) in mpv where the same files were playing properly the previous day with the previous firmware version.

From a small reference check, other video formats do not seem to be affected (I could check h264 with the files I had on hand). I have attached a sample of one of the affected frames and a near-identical (couldn't find the exact same frame in the video) of a copy with software decoding that is functional. I am using Arch Linux (x86-64) with kernel version 4.14.14.
Comment 1 saunders.52 2018-01-23 00:12:36 UTC 
Created attachment 136912 [details]
Software decoded version of the same timestamp in the file.
Comment 2 saunders.52 2018-01-23 00:37:02 UTC 
Oh, info I forgot.
Mesa version: 17.3.2
No irregular log entries appeared for the kernel or video player related to this I could find.
Comment 3 Alex Deucher 2018-01-23 04:07:04 UTC 
This newer firmware exposes a bug in mesa which was fixed in December.  You need a newer version of mesa that contains this patch:
https://cgit.freedesktop.org/mesa/mesa/commit/?id=2ec48039b8aa1f6a5e16f3f12483b88981d0f5d3
Comment 4 saunders.52 2018-01-23 04:55:44 UTC 
Tried compiling it myself with that patch and it fixes the issue. I've opened a bug on the Arch Linux tracker to get them to apply the patch there, and thanks for the help! :)
Comment 5 Emil Velikov 2018-01-24 13:38:21 UTC 
Nicely spotted guys. I'll pick Boyuan's VCN/UVD fixed for the next 17.3 release.

Feel free to forward future requests to the mesa-stable@ mailing list. I won't be able to catch everything that's said on BZ ;-)

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