drm/amdgpu: set CP_HQD_PQ_DOORBELL_CONTROL.DOORBELL_MODE to 1

to avoid reading wrong WPTR from doorbell in sriov vf, set
CP_HQD_PQ_DOORBELL_CONTROL.DOORBELL_MODE to 1 to read WPTR from MQD.
Signed-off-by: Zhigang Luo <Zhigang.Luo@amd.com>
Acked-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c

@@ -1613,6 +1613,9 @@ static int gfx_v9_4_3_xcc_mqd_init(struct amdgpu_ring *ring, int xcc_id)
 				    DOORBELL_SOURCE, 0);
 		tmp = REG_SET_FIELD(tmp, CP_HQD_PQ_DOORBELL_CONTROL,
 				    DOORBELL_HIT, 0);
+		if (amdgpu_sriov_vf(adev))
+			tmp = REG_SET_FIELD(tmp, CP_HQD_PQ_DOORBELL_CONTROL,
+					    DOORBELL_MODE, 1);
 	} else {
 		tmp = REG_SET_FIELD(tmp, CP_HQD_PQ_DOORBELL_CONTROL,
 					 DOORBELL_EN, 0);

drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c

@@ -546,6 +546,9 @@ static void init_mqd_hiq_v9_4_3(struct mqd_manager *mm, void **mqd,
 		m->cp_hqd_pq_control |= CP_HQD_PQ_CONTROL__NO_UPDATE_RPTR_MASK |
 					1 << CP_HQD_PQ_CONTROL__PRIV_STATE__SHIFT |
 					1 << CP_HQD_PQ_CONTROL__KMD_QUEUE__SHIFT;
+		if (amdgpu_sriov_vf(mm->dev->adev))
+			m->cp_hqd_pq_doorbell_control |= 1 <<
+				CP_HQD_PQ_DOORBELL_CONTROL__DOORBELL_MODE__SHIFT;
 		m->cp_mqd_stride_size = kfd_hiq_mqd_stride(mm->dev);
 		if (xcc == 0) {
 			/* Set no_update_rptr = 0 in Master XCC */