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drm/amdgpu: Enable gfx cache probing on HDP write for arcturus

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This allows gfx cache to be probed and invalidated (for none-dirty cache lines)
on a HDP write (from either another GPU or CPU). This should work only for the
memory mapped as RW memory type newly added for arcturus, to achieve some cache
coherence b/t multiple memory clients.

Signed-off-by: Oak Zeng <Oak.Zeng@amd.com>
Acked-by: Christian Konig <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Oak Zeng 2019-10-07 15:32:23 -05:00 committed by Alex Deucher
parent cb1545f710
commit f81b86a043
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
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@ -1194,6 +1194,9 @@ static int gmc_v9_0_hw_init(void *handle)
/* TODO for renoir */
mmhub_v1_0_update_power_gating(adev, true);
break;
case CHIP_ARCTURUS:
WREG32_FIELD15(HDP, 0, HDP_MMHUB_CNTL, HDP_MMHUB_GCC, 1);
break;
default:
break;
}