VLC doesn't play videos anymore since the PowerPC fixes 5.1-3

Hi All,

I figured out, that the VLC player doesn't play videos anymore since the 
PowerPC fixes 5.1-3 [1]. VLC plays videos with the RC1 of kernel 5.1 
without any problems.

VLC error messages:

[100ea580] ts demux warning: first packet for pid=1104 cc=0xe
[100ea580] ts demux warning: first packet for pid=1102 cc=0x4
[100ea580] ts demux warning: first packet for pid=1101 cc=0x8
[10109218] core decoder warning: can't get output picture
[10109218] avcodec decoder warning: disabling direct rendering
[10109218] core decoder warning: can't get output picture

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dmesg: https://bugs.freedesktop.org/attachment.cgi?id=143840

I created a bug report because of the VLC issue with the kernel 5.1-rc2 
and higher today [2]. I got an answer from Michel Dänzer today.

Quote Michel Dänzer:

None of them directly affect the radeon driver.

It's quite likely that this is a PPC specific issue. Your best bet is 
bisecting between rc1 and rc2.

I haven't seen any other similar reports.

----

I was able to remove the PowerPC fixes 5.1-4 and 5.1-3 with the 
following commands:

git revert 6536c5f2c8cf79db0d37e79afcdb227dc854509c -m 1

Output: [master 4b4a8cf] Revert "Merge tag 'powerpc-5.1-4' of 
git://git.kernel.org/pub/scm/linux/kern ... erpc/linux"

git revert a5ed1e96cafde5ba48638f486bfca0685dc6ddc9 -m 1

Output: [master 0c70b7b] Revert "Merge tag 'powerpc-5.1-3' of 
git://git.kernel.org/pub/scm/linux/kern ... erpc/linux"

The removing of the PowerPC fixes 5.1-4 and 5.1-3 has solved the VLC issue.

The problematic code is definitely in the PowerPC fixes 5.1-3 [1].

Please check the PowerPC fixes 5.1-3 [1].

Thanks,

Christian

[1] 
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v5.1-rc2&id=a5ed1e96cafde5ba48638f486bfca0685dc6ddc9
[2] https://bugs.freedesktop.org/show_bug.cgi?id=110304