Bug 215600 - Radeon - *ERROR* Failed waiting for UVD message

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Hi, this is your Linux kernel regression tracker.

I noticed a regression report in bugzilla.kernel.org that afaics nobody
acted upon since it was reported about a week ago, that's why I decided
to forward it to the lists and all the relevant people. To quote
https://bugzilla.kernel.org/show_bug.cgi?id=215600 :

>  Richard Herbert 2022-02-12 22:13:07 UTC
> 
> Created attachment 300445 [details]
> Details
> 
> When attempting to play some types of videos with VLC 3.0.16 (eg. *.flv, *.mp4), when running kernels 5.17-rc1 to 5.17-rc3, only the audio portion is heard and the VLC video screen remains black. Meanwhile, many of these entries are written per second to /var/log/syslog:
> 
> 2/12/22 3:41 PM	starbug	kernel	[drm:radeon_uvd_cs_parse [radeon]] *ERROR* Failed waiting for UVD message (-1)!
> 2/12/22 3:41 PM	starbug	kernel	[drm:radeon_cs_ioctl [radeon]] *ERROR* Invalid command stream !
> 2/12/22 3:41 PM	starbug	kernel	[drm:radeon_uvd_cs_parse [radeon]] *ERROR* Failed waiting for UVD message (-1)!
> 2/12/22 3:41 PM	starbug	kernel	[drm:radeon_cs_ioctl [radeon]] *ERROR* Invalid command stream !
> 2/12/22 3:41 PM	starbug	kernel	[drm:radeon_uvd_cs_parse [radeon]] *ERROR* Failed waiting for UVD message (-1)!
> 2/12/22 3:41 PM	starbug	kernel	[drm:radeon_cs_ioctl [radeon]] *ERROR* Invalid command stream !
> 
> 
> The problem doesn't occur in kernels of the 5.16 series.  It may have been introduced here:
> 
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/diff/drivers/gpu/drm/radeon/radeon_uvd.c?id=v5.16&id2=v5.17-rc1
> 
> 
> Thanks!

Could somebody take a look into this? Or was this discussed somewhere
else already? Or even fixed?

Anyway, to get this tracked:

#regzbot introduced: v5.16..v5.17-rc1
#regzbot from:  Richard Herbert <rherbert@xxxxxxxxxxxx>
#regzbot title: drm: radeon: no sound on video, *ERROR* Failed waiting
for UVD message
#regzbot link: https://bugzilla.kernel.org/show_bug.cgi?id=215600

Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)

P.S.: As the Linux kernel's regression tracker I'm getting a lot of
reports on my table. I can only look briefly into most of them and lack
knowledge about most of the areas they concern. I thus unfortunately
will sometimes get things wrong or miss something important. I hope
that's not the case here; if you think it is, don't hesitate to tell me
in a public reply, it's in everyone's interest to set the public record
straight.

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