drm/amdgpu/swsmu: skip gfx cgpg on s0ix suspend

The SMU expects CGPG to be enabled when entering S0ix.
with this we can re-enable SMU suspend.
Acked-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -2739,8 +2739,7 @@ static int amdgpu_device_ip_suspend_phase2(struct amdgpu_device *adev)
 
 		/* XXX fix these remaining cases */
 		if (adev->in_s0ix &&
-		    (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_SMC || /* breaks suspend */
-		     adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_PSP || /* breaks resume */
+		    (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_PSP || /* breaks resume */
 		     adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_GFX))  /* breaks suspend */
 			continue;
 

drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c

@@ -1431,7 +1431,8 @@ static int smu_suspend(void *handle)
 
 	smu->watermarks_bitmap &= ~(WATERMARKS_LOADED);
 
-	if (smu->is_apu)
+	/* skip CGPG when in S0ix */
+	if (smu->is_apu && !adev->in_s0ix)
 		smu_set_gfx_cgpg(&adev->smu, false);
 
 	return 0;