[PATCH] drm/amdgpu/vcn: reset firmware flags after VCPU buffers are cleared to 0

[Xiang Liu]

In the case of RAS err_event_athub, the VCPU buffers are corrupted and
cannot be restored in amdgpu_vcn_resume(), the buffers are cleared to
0 for good. However, the firmware flags stored in the buffers need to be
reset, or the firmware cannot work properly.

Signed-off-by: Xiang Liu <xiang.liu at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/vcn_v4_0_3.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v4_0_3.c b/drivers/gpu/drm/amd/amdgpu/vcn_v4_0_3.c
index d011e4678ca1..49ef8f43e3c5 100644
--- a/drivers/gpu/drm/amd/amdgpu/vcn_v4_0_3.c
+++ b/drivers/gpu/drm/amd/amdgpu/vcn_v4_0_3.c
@@ -279,6 +279,8 @@ static int vcn_v4_0_3_hw_init(struct amdgpu_ip_block *ip_block)
 			ring->sched.ready = true;
 		}
 	} else {
+		volatile struct amdgpu_vcn4_fw_shared *fw_shared;
+
 		for (i = 0; i < adev->vcn.num_vcn_inst; ++i) {
 			vcn_inst = GET_INST(VCN, i);
 			ring = &adev->vcn.inst[i].ring_enc[0];
@@ -303,6 +305,16 @@ static int vcn_v4_0_3_hw_init(struct amdgpu_ip_block *ip_block)
 					regVCN_RB1_DB_CTRL);
 			}
 
+			fw_shared = adev->vcn.inst[i].fw_shared.cpu_addr;
+			if (!fw_shared->sq.is_enabled) {
+				fw_shared->present_flag_0 = cpu_to_le32(
+						AMDGPU_FW_SHARED_FLAG_0_UNIFIED_QUEUE);
+				fw_shared->sq.is_enabled = true;
+
+				if (amdgpu_vcnfw_log)
+					amdgpu_vcn_fwlog_init(&adev->vcn.inst[i]);
+			}
+
 			r = amdgpu_ring_test_helper(ring);
 			if (r)
 				return r;
-- 
2.34.1