drm/amdgpu: fix bug mclk can't change on Polaris

the root cause is we gate the clock to uvd vcpu.
mclk's change should need the response from uvd if
it is power on.
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/uvd_v5_0.c

@@ -640,7 +640,7 @@ static void uvd_v5_0_enable_clock_gating(struct amdgpu_device *adev, bool enable
 		     UVD_SUVD_CGC_GATE__SDB_MASK;
 
 	if (enable) {
-		data3 |= (UVD_CGC_GATE__SYS_MASK       |
+		data3 |= (UVD_CGC_GATE__SYS_MASK     |
 			UVD_CGC_GATE__UDEC_MASK      |
 			UVD_CGC_GATE__MPEG2_MASK     |
 			UVD_CGC_GATE__RBC_MASK       |
@@ -656,9 +656,11 @@ static void uvd_v5_0_enable_clock_gating(struct amdgpu_device *adev, bool enable
 			UVD_CGC_GATE__UDEC_DB_MASK   |
 			UVD_CGC_GATE__UDEC_MP_MASK   |
 			UVD_CGC_GATE__WCB_MASK       |
-			UVD_CGC_GATE__VCPU_MASK      |
 			UVD_CGC_GATE__JPEG_MASK      |
 			UVD_CGC_GATE__SCPU_MASK);
+		/* only in pg enabled, we can gate clock to vcpu*/
+		if (adev->pg_flags & AMD_PG_SUPPORT_UVD)
+			data3 |= UVD_CGC_GATE__VCPU_MASK;
 		data3 &= ~UVD_CGC_GATE__REGS_MASK;
 		data1 |= suvd_flags;
 	} else {

drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c

@@ -879,10 +879,13 @@ static void uvd_v6_0_enable_clock_gating(struct amdgpu_device *adev, bool enable
 			UVD_CGC_GATE__UDEC_DB_MASK   |
 			UVD_CGC_GATE__UDEC_MP_MASK   |
 			UVD_CGC_GATE__WCB_MASK       |
-			UVD_CGC_GATE__VCPU_MASK      |
 			UVD_CGC_GATE__JPEG_MASK      |
 			UVD_CGC_GATE__SCPU_MASK      |
 			UVD_CGC_GATE__JPEG2_MASK);
+		/* only in pg enabled, we can gate clock to vcpu*/
+		if (adev->pg_flags & AMD_PG_SUPPORT_UVD)
+			data3 |= UVD_CGC_GATE__VCPU_MASK;
+
 		data3 &= ~UVD_CGC_GATE__REGS_MASK;
 	} else {
 		data3 = 0;