From 7055f4a353bbe0dfe99b0a5488644bbbeefe6a0a Mon Sep 17 00:00:00 2001 From: Boyuan Zhang Date: Fri, 27 Mar 2020 13:49:11 -0400 Subject: [PATCH] drm/amdgpu: add workaround for issue in DPG for VCN3.0 To workaround an issue in DPG V2: update description. Signed-off-by: Boyuan Zhang Reviewed-by: James Zhu Reviewed-by: Alex Deucher Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c b/drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c index c9b5d5a..98ba6dd 100644 --- a/drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c +++ b/drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c @@ -1340,6 +1340,10 @@ static void vcn_v3_0_dec_ring_set_wptr(struct amdgpu_ring *ring) { struct amdgpu_device *adev = ring->adev; + if (adev->pg_flags & AMD_PG_SUPPORT_VCN_DPG) + WREG32_SOC15(VCN, ring->me, mmUVD_SCRATCH2, + lower_32_bits(ring->wptr) | 0x80000000); + if (ring->use_doorbell) { adev->wb.wb[ring->wptr_offs] = lower_32_bits(ring->wptr); WDOORBELL32(ring->doorbell_index, lower_32_bits(ring->wptr)); -- 2.7.4