[bug][vaapi][h264] The commit 7cbe08a930a132d84b4cf79953b00b074ec7a2a7 on certain video files leads to problems with VAAPI hardware decoding.

[Alex Deucher]

On Wed, Dec 7, 2022 at 9:44 AM Mikhail Gavrilov
<mikhail.v.gavrilov at gmail.com> wrote:
>
> Hi,
>
> I found a commit that on certain video files leads to problems with
> VAAPI hardware decoding.
> Reproducing the issue requires mesa to be built with the h264 hardware
> encoder enabled and the attached file to be playable in the vlc
> player.
> Before kernel 5.16 this only led to an artifact in the form of a green
> bar at the top of the screen, then starting from 5.17 the GPU began to
> freeze.
> In 6.0, the problem with GPU freezing is solved, but the kernel itself
> freezes when certain actions are performed. And the vlc application
> cannot be terminated in any way.

What GPU do you have and what entries do you have in
sys/class/drm/card0/device/ip_discovery/die/0/UVD for the device?
specifically the harvest settings for each instance if there are
multiple instances.  If you had an rx6700 you might have been using
software rendering prior to commit
7cbe08a930a132d84b4cf79953b00b074ec7a2a.

Alex

>
> The kernel trace would be like:
> [  976.184187] amdgpu 0000:03:00.0: amdgpu: [mmhub] page fault
> (src_id:0 ring:40 vmid:1 pasid:32785, for process vlc pid 9905 thread
> vlc:cs0 pid 9956)
> [  976.184205] amdgpu 0000:03:00.0: amdgpu:   in page starting at
> address 0x0000800106b53000 from client 0x12 (VMC)
> [  976.184210] amdgpu 0000:03:00.0: amdgpu:
> MMVM_L2_PROTECTION_FAULT_STATUS:0x00141651
> [  976.184213] amdgpu 0000:03:00.0: amdgpu: Faulty UTCL2 client ID: VCN0 (0xb)
> [  976.184216] amdgpu 0000:03:00.0: amdgpu: MORE_FAULTS: 0x1
> [  976.184219] amdgpu 0000:03:00.0: amdgpu: WALKER_ERROR: 0x0
> [  976.184222] amdgpu 0000:03:00.0: amdgpu: PERMISSION_FAULTS: 0x5
> [  976.184225] amdgpu 0000:03:00.0: amdgpu: MAPPING_ERROR: 0x0
> [  976.184228] amdgpu 0000:03:00.0: amdgpu: RW: 0x1
> [  976.184234] amdgpu 0000:03:00.0: amdgpu: [mmhub] page fault
> (src_id:0 ring:40 vmid:1 pasid:32785, for process vlc pid 9905 thread
> vlc:cs0 pid 9956)
> [  976.184238] amdgpu 0000:03:00.0: amdgpu:   in page starting at
> address 0x0000800106b52000 from client 0x12 (VMC)
> [  976.184242] amdgpu 0000:03:00.0: amdgpu:
> MMVM_L2_PROTECTION_FAULT_STATUS:0x00000000
> [  976.184245] amdgpu 0000:03:00.0: amdgpu: Faulty UTCL2 client ID:
> unknown (0x0)
> [  976.184248] amdgpu 0000:03:00.0: amdgpu: MORE_FAULTS: 0x0
> [  976.184251] amdgpu 0000:03:00.0: amdgpu: WALKER_ERROR: 0x0
> [  976.184253] amdgpu 0000:03:00.0: amdgpu: PERMISSION_FAULTS: 0x0
> [  976.184256] amdgpu 0000:03:00.0: amdgpu: MAPPING_ERROR: 0x0
> [  976.184259] amdgpu 0000:03:00.0: amdgpu: RW: 0x0
> [  976.184264] amdgpu 0000:03:00.0: amdgpu: [mmhub] page fault
> (src_id:0 ring:40 vmid:1 pasid:32785, for process vlc pid 9905 thread
> vlc:cs0 pid 9956)
> [  976.184268] amdgpu 0000:03:00.0: amdgpu:   in page starting at
> address 0x0000800106b53000 from client 0x12 (VMC)
> [  976.184271] amdgpu 0000:03:00.0: amdgpu:
> MMVM_L2_PROTECTION_FAULT_STATUS:0x00000000
> [  976.184273] amdgpu 0000:03:00.0: amdgpu: Faulty UTCL2 client ID:
> unknown (0x0)
> [  976.184276] amdgpu 0000:03:00.0: amdgpu: MORE_FAULTS: 0x0
> [  976.184279] amdgpu 0000:03:00.0: amdgpu: WALKER_ERROR: 0x0
> [  976.184281] amdgpu 0000:03:00.0: amdgpu: PERMISSION_FAULTS: 0x0
> [  976.184284] amdgpu 0000:03:00.0: amdgpu: MAPPING_ERROR: 0x0
> [  976.184286] amdgpu 0000:03:00.0: amdgpu: RW: 0x0
>
>
> The problematic commit is:
> commit 7cbe08a930a132d84b4cf79953b00b074ec7a2a7 (HEAD)
> Author: Alex Deucher <alexander.deucher at amd.com>
> Date:   Mon Aug 9 11:22:20 2021 -0400
>
>     drm/amdgpu: handle VCN instances when harvesting (v2)
>
>     There may be multiple instances and only one is harvested.
>
>     v2: fix typo in commit message
>
>     Fixes: 83a0b8639185 ("drm/amdgpu: add judgement when add ip blocks (v2)")
>     Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1673
>     Reviewed-by: Guchun Chen <guchun.chen at amd.com>
>     Reviewed-by: James Zhu <James.Zhu at amd.com>
>     Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
>     Cc: stable at vger.kernel.org
>
>
> Thanks!
>
> --
> Best Regards,
> Mike Gavrilov.