Commit 7055f4a3 authored by Boyuan Zhang's avatar Boyuan Zhang Committed by Alex Deucher
Browse files

drm/amdgpu: add workaround for issue in DPG for VCN3.0 



To workaround an issue in DPG

V2: update description.

Signed-off-by: default avatarBoyuan Zhang <boyuan.zhang@amd.com>
Reviewed-by: default avatarJames Zhu <james.zhu@amd.com>
Reviewed-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 4d319ed6

drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c

+4 −0
Original line number Diff line number Diff line
@@ -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));