drm/amdgpu: separate ras irq from vcn instance irq for UVD_POISON

Separate vcn RAS poison consumption handling from the instance irq, and
register dedicated ras_poison_irq src and funcs for UVD_POISON.

v2:
- Separate ras irq from vcn instance irq
- Improve the subject and code comments

v3:
- Split the patch into three parts
- Improve the code comments
Suggested-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Horatio Zhang <Hongkun.Zhang@amd.com>
Reviewed-by: Tao Zhou <tao.zhou1@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -1188,6 +1188,31 @@ int amdgpu_vcn_process_poison_irq(struct amdgpu_device *adev,
 	return 0;
 }
 
+int amdgpu_vcn_ras_late_init(struct amdgpu_device *adev, struct ras_common_if *ras_block)
+{
+	int r, i;
+
+	r = amdgpu_ras_block_late_init(adev, ras_block);
+	if (r)
+		return r;
+
+	if (amdgpu_ras_is_supported(adev, ras_block->block)) {
+		for (i = 0; i < adev->vcn.num_vcn_inst; i++) {
+			if (adev->vcn.harvest_config & (1 << i))
+				continue;
+
+			r = amdgpu_irq_get(adev, &adev->vcn.inst[i].ras_poison_irq, 0);
+			if (r)
+				goto late_fini;
+		}
+	}
+	return 0;
+
+late_fini:
+	amdgpu_ras_block_late_fini(adev, ras_block);
+	return r;
+}
+
 int amdgpu_vcn_ras_sw_init(struct amdgpu_device *adev)
 {
 	int err;
@@ -1209,7 +1234,7 @@ int amdgpu_vcn_ras_sw_init(struct amdgpu_device *adev)
 	adev->vcn.ras_if = &ras->ras_block.ras_comm;
 
 	if (!ras->ras_block.ras_late_init)
-		ras->ras_block.ras_late_init = amdgpu_ras_block_late_init;
+		ras->ras_block.ras_late_init = amdgpu_vcn_ras_late_init;
 
 	return 0;
 }

drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.h

@@ -239,6 +239,7 @@ struct amdgpu_vcn_inst {
 	struct amdgpu_ring	ring_enc[AMDGPU_VCN_MAX_ENC_RINGS];
 	atomic_t		sched_score;
 	struct amdgpu_irq_src	irq;
+	struct amdgpu_irq_src	ras_poison_irq;
 	struct amdgpu_vcn_reg	external;
 	struct amdgpu_bo	*dpg_sram_bo;
 	struct dpg_pause_state	pause_state;
@@ -409,6 +410,8 @@ void amdgpu_debugfs_vcn_fwlog_init(struct amdgpu_device *adev,
 int amdgpu_vcn_process_poison_irq(struct amdgpu_device *adev,
 			struct amdgpu_irq_src *source,
 			struct amdgpu_iv_entry *entry);
+int amdgpu_vcn_ras_late_init(struct amdgpu_device *adev,
+			struct ras_common_if *ras_block);
 int amdgpu_vcn_ras_sw_init(struct amdgpu_device *adev);
 
 #endif