I see >= tonga uvd height has recently been increased -
https://cgit.freedesktop.org/mesa/mesa/commit/?id=353a4f844f9e845dad93de9c28fa0d484b4b92d3
radeon/uvd: increase max height to 4096 for VI and newer
With this issue 'mpv --hwdec=vdpau --vo=vdpau <stream>' fails
for vdpau decode if the stream height is 4096. Vdpau decode of
height upto 4096 is necessary usecase on amdgpu driver for VI
and newer platforms.
The fix is in driver specific implementation of "Decoder
Query Capabilities" API to return 4096 for VI and newer
platforms. With this fix vdpauinfo reports height support as
4096 and mpv for vdpau decode works fine for 4096 height streams.
On agd5f drm-fixes-4.5 4096x4096 fails for me (also fails with --vo vdpau)
andy [~]$ mpv --hwdec=vdpau /mnt/sdb1/ffmpeg-mpl-tests/x264-4096.mkv
Playing: /mnt/sdb1/ffmpeg-mpl-tests/x264-4096.mkv
(+) Video --vid=1 (*) (h264)
amdgpu: Failed to allocate a buffer:
amdgpu: size : 0 bytes
amdgpu: alignment : 4096 bytes
amdgpu: domains : 2
amdgpu: Failed to allocate a buffer:
amdgpu: size : 0 bytes
amdgpu: alignment : 4096 bytes
amdgpu: domains : 2
EE radeon_uvd.c:1109 ruvd_create_decoder UVD - Can't allocated bitstream
buffers.
[vo/opengl/x11] Disabling screensaver failed (-1). Make sure the
xdg-screensaver script is installed.
Using software decoding.
VO: [opengl] 4096x4096 => 7282x4096 yuv420p
dmesg
[ 8308.529176] [TTM] Illegal buffer object size
[ 8308.529210] [drm:amdgpu_gem_object_create [amdgpu]] *ERROR* Failed to
allocate GEM object (0, 2, 4096, -22)
[ 8308.529326] [TTM] Illegal buffer object size
[ 8308.529339] [drm:amdgpu_gem_object_create [amdgpu]] *ERROR* Failed to
allocate GEM object (0, 2, 4096, -22)