Merge v6.12.35linux-rolling-lts

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v4_0_5.c b/drivers/gpu/drm/amd/amdgpu/vcn_v4_0_5.c
index e0b02bf1c563..3d114ea7049f 100644
--- a/drivers/gpu/drm/amd/amdgpu/vcn_v4_0_5.c
+++ b/drivers/gpu/drm/amd/amdgpu/vcn_v4_0_5.c
@@ -985,6 +985,10 @@ static int vcn_v4_0_5_start_dpg_mode(struct amdgpu_device *adev, int inst_idx, b
 			ring->doorbell_index << VCN_RB1_DB_CTRL__OFFSET__SHIFT |
 			VCN_RB1_DB_CTRL__EN_MASK);
 
+	/* Keeping one read-back to ensure all register writes are done, otherwise
+	 * it may introduce race conditions */
+	RREG32_SOC15(VCN, inst_idx, regVCN_RB1_DB_CTRL);
+
 	return 0;
 }
 
@@ -1167,6 +1171,10 @@ static int vcn_v4_0_5_start(struct amdgpu_device *adev)
 		tmp |= VCN_RB_ENABLE__RB1_EN_MASK;
 		WREG32_SOC15(VCN, i, regVCN_RB_ENABLE, tmp);
 		fw_shared->sq.queue_mode &= ~(FW_QUEUE_RING_RESET | FW_QUEUE_DPG_HOLD_OFF);
+
+		/* Keeping one read-back to ensure all register writes are done, otherwise
+		 * it may introduce race conditions */
+		RREG32_SOC15(VCN, i, regVCN_RB_ENABLE);
 	}
 
 	return 0;