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path: root/drivers/gpu/drm/amd/amdgpu/hdp_v4_0.c
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Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/hdp_v4_0.c')
-rw-r--r--drivers/gpu/drm/amd/amdgpu/hdp_v4_0.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/hdp_v4_0.c b/drivers/gpu/drm/amd/amdgpu/hdp_v4_0.c
index d7811e0327cb..02400d97a95c 100644
--- a/drivers/gpu/drm/amd/amdgpu/hdp_v4_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/hdp_v4_0.c
@@ -146,6 +146,9 @@ static void hdp_v4_0_init_registers(struct amdgpu_device *adev)
WREG32_FIELD15(HDP, 0, HDP_MISC_CNTL, FLUSH_INVALIDATE_CACHE, 1);
+ if (adev->ip_versions[HDP_HWIP][0] == IP_VERSION(4, 4, 0))
+ WREG32_FIELD15(HDP, 0, HDP_MISC_CNTL, READ_BUFFER_WATERMARK, 2);
+
WREG32_SOC15(HDP, 0, mmHDP_NONSURFACE_BASE, (adev->gmc.vram_start >> 8));
WREG32_SOC15(HDP, 0, mmHDP_NONSURFACE_BASE_HI, (adev->gmc.vram_start >> 40));
}