drm/amdgpu: fix incorrect VCN revision in SRIOV

Guest OS will setup VCN instance 1 which is disabled as an enabled instance and
execute initialization work on it, but this causes VCN ib ring test failure
on the disabled VCN instance during modprobe:

amdgpu 0000:00:08.0: amdgpu: ring vcn_enc_1.0 uses VM inv eng 5 on hub 1
amdgpu 0000:00:08.0: [drm:amdgpu_ib_ring_tests [amdgpu]] *ERROR* IB test failed on vcn_dec_0 (-110).
amdgpu 0000:00:08.0: [drm:amdgpu_ib_ring_tests [amdgpu]] *ERROR* IB test failed on vcn_enc_0.0 (-110).
[drm:amdgpu_device_delayed_init_work_handler [amdgpu]] *ERROR* ib ring test failed (-110).

v2: drop amdgpu_discovery_get_vcn_version and rename sriov_config to
vcn_config
v3: modify VCN's revision in SR-IOV and bare-metal

Fixes: 36b7d5646476 ("drm/amdgpu: handle SRIOV VCN revision parsing")
Signed-off-by: Leslie Shi <Yuliang.Shi@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Guchun Chen <guchun.chen@amd.com>

Author: OkabeRintarou

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

@@ -380,18 +380,15 @@ int amdgpu_discovery_reg_base_init(struct amdgpu_device *adev)
 				  ip->revision);
 
 			if (le16_to_cpu(ip->hw_id) == VCN_HWID) {
-				if (amdgpu_sriov_vf(adev)) {
-					/* SR-IOV modifies each VCN’s revision (uint8)
-					 * Bit [5:0]: original revision value
-					 * Bit [7:6]: en/decode capability:
-					 *     0b00 : VCN function normally
-					 *     0b10 : encode is disabled
-					 *     0b01 : decode is disabled
-					 */
-					adev->vcn.sriov_config[adev->vcn.num_vcn_inst] =
-						(ip->revision & 0xc0) >> 6;
-					ip->revision &= ~0xc0;
-				}
+				/* Bit [5:0]: original revision value
+				 * Bit [7:6]: en/decode capability:
+				 *     0b00 : VCN function normally
+				 *     0b10 : encode is disabled
+				 *     0b01 : decode is disabled
+				 */
+				adev->vcn.vcn_config[adev->vcn.num_vcn_inst] =
+					ip->revision & 0xc0;
+				ip->revision &= ~0xc0;
 				adev->vcn.num_vcn_inst++;
 			}
 			if (le16_to_cpu(ip->hw_id) == SDMA0_HWID ||
@@ -485,14 +482,6 @@ int amdgpu_discovery_get_ip_version(struct amdgpu_device *adev, int hw_id, int n
 	return -EINVAL;
 }
 
-
-int amdgpu_discovery_get_vcn_version(struct amdgpu_device *adev, int vcn_instance,
-				     int *major, int *minor, int *revision)
-{
-	return amdgpu_discovery_get_ip_version(adev, VCN_HWID,
-					       vcn_instance, major, minor, revision);
-}
-
 void amdgpu_discovery_harvest_ip(struct amdgpu_device *adev)
 {
 	struct binary_header *bhdr;

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

@@ -33,8 +33,6 @@ void amdgpu_discovery_harvest_ip(struct amdgpu_device *adev);
 int amdgpu_discovery_get_ip_version(struct amdgpu_device *adev, int hw_id, int number_instance,
                                     int *major, int *minor, int *revision);
 
-int amdgpu_discovery_get_vcn_version(struct amdgpu_device *adev, int vcn_instance,
-				     int *major, int *minor, int *revision);
 int amdgpu_discovery_get_gfx_info(struct amdgpu_device *adev);
 int amdgpu_discovery_set_ip_blocks(struct amdgpu_device *adev);
 

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

@@ -284,20 +284,13 @@ int amdgpu_vcn_sw_fini(struct amdgpu_device *adev)
 bool amdgpu_vcn_is_disabled_vcn(struct amdgpu_device *adev, enum vcn_ring_type type, uint32_t vcn_instance)
 {
 	bool ret = false;
+	int vcn_config = adev->vcn.vcn_config[vcn_instance];
 
-	int major;
-	int minor;
-	int revision;
-
-	/* if cannot find IP data, then this VCN does not exist */
-	if (amdgpu_discovery_get_vcn_version(adev, vcn_instance, &major, &minor, &revision) != 0)
-		return true;
-
-	if ((type == VCN_ENCODE_RING) && (revision & VCN_BLOCK_ENCODE_DISABLE_MASK)) {
+	if ((type == VCN_ENCODE_RING) && (vcn_config & VCN_BLOCK_ENCODE_DISABLE_MASK)) {
 		ret = true;
-	} else if ((type == VCN_DECODE_RING) && (revision & VCN_BLOCK_DECODE_DISABLE_MASK)) {
+	} else if ((type == VCN_DECODE_RING) && (vcn_config & VCN_BLOCK_DECODE_DISABLE_MASK)) {
 		ret = true;
-	} else if ((type == VCN_UNIFIED_RING) && (revision & VCN_BLOCK_QUEUE_DISABLE_MASK)) {
+	} else if ((type == VCN_UNIFIED_RING) && (vcn_config & VCN_BLOCK_QUEUE_DISABLE_MASK)) {
 		ret = true;
 	}
 

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

@@ -235,7 +235,7 @@ struct amdgpu_vcn {
 
 	uint8_t	num_vcn_inst;
 	struct amdgpu_vcn_inst	 inst[AMDGPU_MAX_VCN_INSTANCES];
-	uint8_t			 sriov_config[AMDGPU_MAX_VCN_INSTANCES];
+	uint8_t			 vcn_config[AMDGPU_MAX_VCN_INSTANCES];
 	struct amdgpu_vcn_reg	 internal;
 	struct mutex		 vcn_pg_lock;
 	struct mutex		vcn1_jpeg1_workaround;