https://bugs.freedesktop.org/show_bug.cgi?id=102296
Bug ID: 102296
Summary: R9 285 VCE corruption since drm/amdgpu/gmc8: use the
vram location programmed by the vbios
Product: DRI
Version: DRI git
Hardware: Other
OS: All
Status: NEW
Severity: normal
Priority: medium
Component: DRM/AMDgpu
Assignee: dri-devel@lists.freedesktop.org
Reporter: adf.li...@gmail.com
Bit late with this, bisected on drm-next-4.13-wip
R9 285 Tonga I am getting corrupted output from VCE encode, omx or vaapi since
below commit.
To re-produce this you need to use gstreamer and encode "fast and large" eg.
2160p from raw nv12.
Slow things like ffmpeg or gst-vaapi without ! queue ! seem to hide the issue
somewhat.
26d4ac55d2260f8685475b3f6e76e276a238cca7 is the first bad commit
commit 26d4ac55d2260f8685475b3f6e76e276a238cca7
Author: Alex Deucher <alexander.deuc...@amd.com>
Date: Tue Nov 1 13:08:33 2016 -0400
drm/amdgpu/gmc8: use the vram location programmed by the vbios
This makes mc programming much simpler in future patches.
Since evergreen, the vbios has been programming the fb location
to the proper vram size. The only reason to reprogram it would
be to change the location.
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