drm/amdgpu/vcn:Update SPG mode VCN memory control

Update Static Power Gate  mode VCN memory control
Signed-off-by: James Zhu <James.Zhu@amd.com>
Acked-by: Leo Liu <leo.liu@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/vcn_v1_0.c

@@ -787,13 +787,12 @@ static int vcn_v1_0_start_spg_mode(struct amdgpu_device *adev)
 	mdelay(5);
 
 	/* initialize VCN memory controller */
-	WREG32_SOC15(UVD, 0, mmUVD_LMI_CTRL,
-		(0x40 << UVD_LMI_CTRL__WRITE_CLEAN_TIMER__SHIFT) |
-		UVD_LMI_CTRL__WRITE_CLEAN_TIMER_EN_MASK |
-		UVD_LMI_CTRL__DATA_COHERENCY_EN_MASK |
-		UVD_LMI_CTRL__VCPU_DATA_COHERENCY_EN_MASK |
-		UVD_LMI_CTRL__REQ_MODE_MASK |
-		0x00100000L);
+	tmp = RREG32_SOC15(UVD, 0, mmUVD_LMI_CTRL);
+	WREG32_SOC15(UVD, 0, mmUVD_LMI_CTRL, tmp		|
+		UVD_LMI_CTRL__WRITE_CLEAN_TIMER_EN_MASK	|
+		UVD_LMI_CTRL__MASK_MC_URGENT_MASK			|
+		UVD_LMI_CTRL__DATA_COHERENCY_EN_MASK		|
+		UVD_LMI_CTRL__VCPU_DATA_COHERENCY_EN_MASK);
 
 #ifdef __BIG_ENDIAN
 	/* swap (8 in 32) RB and IB */