https://bugs.freedesktop.org/show_bug.cgi?id=104275
--- Comment #8 from Michel Dänzer <mic...@daenzer.net> ---
(In reply to Alex_Zhang1 from comment #7)
Without the patch referenced in comment 3, a buffer must be pinned to VRAM
before it can be scanned out (displayed). The problem described in this report
happens because pinning to VRAM fails, because there isn't enough space in
VRAM. The patch allows buffers to be pinned to GTT instead of VRAM for scanout.
Another DC patch is probably needed to fix the garbled display described in
comment 4. Maybe try the patch on top of the amd-staging-drm-next branch.
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