[PATCH 2/3] drm/amdgpu: Check RRMT status for VCN v4.0.3

[Lijo Lazar]

RRMT could get dynamically enabled/disabled by PSP firmware. Read the
status from register for reading RRMT status. For VFs, this is not
accessible, hence assume that it's always disabled for now.

Signed-off-by: Lijo Lazar <lijo.lazar at amd.com>
Reviewed-by: Sathishkumar S <sathishkumar.sundararaju at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.h | 7 +++++++
 drivers/gpu/drm/amd/amdgpu/vcn_v4_0_3.c | 8 ++++++--
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.h
index adaf4388ad28..c92f683ee595 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.h
@@ -238,6 +238,12 @@
 
 #define AMDGPU_DRM_KEY_INJECT_WORKAROUND_VCNFW_ASD_HANDSHAKING 2
 
+enum amdgpu_vcn_caps {
+	AMDGPU_VCN_RRMT_ENABLED,
+};
+
+#define AMDGPU_VCN_CAPS(caps) BIT(AMDGPU_VCN_##caps)
+
 enum fw_queue_mode {
 	FW_QUEUE_RING_RESET = 1,
 	FW_QUEUE_DPG_HOLD_OFF = 2,
@@ -345,6 +351,7 @@ struct amdgpu_vcn {
 	uint32_t		*ip_dump;
 
 	uint32_t		supported_reset;
+	uint32_t		caps;
 };
 
 struct amdgpu_fw_shared_rb_ptrs_struct {
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 ecdc027f8220..f0716c10f23e 100644
--- a/drivers/gpu/drm/amd/amdgpu/vcn_v4_0_3.c
+++ b/drivers/gpu/drm/amd/amdgpu/vcn_v4_0_3.c
@@ -98,8 +98,7 @@ static void vcn_v4_0_3_enable_ras(struct amdgpu_device *adev,
 
 static inline bool vcn_v4_0_3_normalizn_reqd(struct amdgpu_device *adev)
 {
-	return (amdgpu_sriov_vf(adev) ||
-		(amdgpu_ip_version(adev, GC_HWIP, 0) == IP_VERSION(9, 4, 4)));
+	return (adev->vcn.caps & AMDGPU_VCN_CAPS(RRMT_ENABLED)) == 0;
 }
 
 /**
@@ -295,6 +294,11 @@ static int vcn_v4_0_3_hw_init(struct amdgpu_ip_block *ip_block)
 			ring->sched.ready = true;
 		}
 	} else {
+		/* This flag is not set for VF, assumed to be disabled always */
+		if (RREG32_SOC15(VCN, GET_INST(VCN, 0), regVCN_RRMT_CNTL) &
+		    0x100)
+			adev->vcn.caps |= AMDGPU_VCN_CAPS(RRMT_ENABLED);
+
 		for (i = 0; i < adev->vcn.num_vcn_inst; ++i) {
 			struct amdgpu_vcn4_fw_shared *fw_shared;
 
-- 
2.25.1