VP9 Encoder causes GPU hang for tiled encode

[sreerenjb]

How to reproduce the issue:

Instruct libva to encode with 2 columns tiles either in libva-utils or gstreamer-vaapi by setting the param:
pic_param->log2_tile_columns=1

Immediate GPU hang "i915 0000:00:02.0: Resetting vcs0 for hang on vcs0"

[Brainiarc7]

Hello there,

With ffmpeg, can you reproduce the same when you pass the -slices:v option to the vp9_vaapi encoder?

[sreerenjb]

I haven't tried. I don't have the ffmpeg vaapi stack. But It should be reproducible I guess because there is no specific logic involved with this, just the matter of assigning a non-zero value to tile_column attribute and it should hit the gpu hang. :)

[xhaihao]

Yes, the devices supported by this driver don't support vp9 encoding with multiple tiles.

[Brainiarc7]

Ouch. That hurts.