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drm/amd: the data retured from PRT is expected to be 0

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The dummy page for returning from PRT resides inside system memory,
need set system flag bit in VM_L2_CNTL.

Signed-off-by: Jack Xiao <Jack.Xiao@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Jack Xiao
2019-05-20 12:16:19 +08:00
committed by Alex Deucher
parent b1fa87a48e
commit 3ebab625e6
2 changed files with 4 additions and 1 deletions
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3
drivers/gpu/drm/amd/amdgpu/gfxhub_v2_0.c
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@@ -135,7 +135,8 @@ static void gfxhub_v2_0_init_cache_regs(struct amdgpu_device *adev)
tmp = RREG32_SOC15(GC, 0, mmGCVM_L2_CNTL);
tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL, ENABLE_L2_CACHE, 1);
tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL, ENABLE_L2_FRAGMENT_PROCESSING, 0);
tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL,
ENABLE_DEFAULT_PAGE_OUT_TO_SYSTEM_MEMORY, 1);
/* XXX for emulation, Refer to closed source code.*/
tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL,
L2_PDE0_CACHE_TAG_GENERATION_MODE, 0);