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(parent: 49d06a4) | patch
drm/amdgpu: fixup bad vram size on gmc v8
authorZongmin Zhou <zhouzongmin@kylinos.cn>
Wed, 15 Dec 2021 09:23:37 +0000 (17:23 +0800)
committerAlex Deucher <alexander.deucher@amd.com>
Tue, 28 Dec 2021 21:05:21 +0000 (16:05 -0500)
commit797b6da322bdce6e18c8464a1c6f5a6cf665a3aa
tree4282928d5d852620e842fda170804798447e4095tree | snapshot
parent49d06a45f87c03c3c34dcb111427fbada5d57bf1commit | diff
drm/amdgpu: fixup bad vram size on gmc v8

Some boards(like RX550) seem to have garbage in the upper
16 bits of the vram size register.  Check for
this and clamp the size properly.  Fixes
boards reporting bogus amounts of vram.

after add this patch,the maximum GPU VRAM size is 64GB,
otherwise only 64GB vram size will be used.

Signed-off-by: Zongmin Zhou<zhouzongmin@kylinos.cn>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c diff | blob | history
Linux Kernel Source Tree.