[PATCH 2/2] drm/amdgpu: Reinit FW shared flags on VCN v5.0.1

[Lijo Lazar]

After a full device reset, shared memory region will clear out and it's
not possible to reliably save the region in case of RAS errors.
Reinitialize the flags if required.

Signed-off-by: Lijo Lazar <lijo.lazar at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/vcn_v5_0_1.c | 28 ++++++++++++++++++-------
 1 file changed, 20 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v5_0_1.c b/drivers/gpu/drm/amd/amdgpu/vcn_v5_0_1.c
index 7ef83c9346e5..f364f6095e06 100644
--- a/drivers/gpu/drm/amd/amdgpu/vcn_v5_0_1.c
+++ b/drivers/gpu/drm/amd/amdgpu/vcn_v5_0_1.c
@@ -76,6 +76,22 @@ static int vcn_v5_0_1_early_init(struct amdgpu_ip_block *ip_block)
 	return 0;
 }
 
+static void vcn_v5_0_1_fw_shared_init(struct amdgpu_device *adev, int inst_idx)
+{
+	struct amdgpu_vcn5_fw_shared *fw_shared;
+
+	fw_shared = adev->vcn.inst[inst_idx].fw_shared.cpu_addr;
+
+	if (fw_shared->sq.is_enabled)
+		return;
+	fw_shared->present_flag_0 =
+		cpu_to_le32(AMDGPU_FW_SHARED_FLAG_0_UNIFIED_QUEUE);
+	fw_shared->sq.is_enabled = 1;
+
+	if (amdgpu_vcnfw_log)
+		amdgpu_vcn_fwlog_init(&adev->vcn.inst[inst_idx]);
+}
+
 /**
  * vcn_v5_0_1_sw_init - sw init for VCN block
  *
@@ -96,8 +112,6 @@ static int vcn_v5_0_1_sw_init(struct amdgpu_ip_block *ip_block)
 		return r;
 
 	for (i = 0; i < adev->vcn.num_vcn_inst; i++) {
-		volatile struct amdgpu_vcn5_fw_shared *fw_shared;
-
 		vcn_inst = GET_INST(VCN, i);
 
 		r = amdgpu_vcn_sw_init(adev, i);
@@ -122,12 +136,7 @@ static int vcn_v5_0_1_sw_init(struct amdgpu_ip_block *ip_block)
 		if (r)
 			return r;
 
-		fw_shared = adev->vcn.inst[i].fw_shared.cpu_addr;
-		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]);
+		vcn_v5_0_1_fw_shared_init(adev, i);
 	}
 
 	/* TODO: Add queue reset mask when FW fully supports it */
@@ -207,6 +216,9 @@ static int vcn_v5_0_1_hw_init(struct amdgpu_ip_block *ip_block)
 				 9 * vcn_inst),
 				adev->vcn.inst[i].aid_id);
 
+		/* Re-init fw_shared when RAS fatal error occurred */
+		vcn_v5_0_1_fw_shared_init(adev, i);
+
 		r = amdgpu_ring_test_helper(ring);
 		if (r)
 			return r;
-- 
2.25.1