drm/amdgpu: add gmc cg support for sienna_cichlid

Add gmc clockgating support for sienna_cichlid.
The athub version used for sienna_cichlid is v2.1.
Signed-off-by: Likun Gao <Likun.Gao@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c

@@ -48,6 +48,7 @@
 #include "gfxhub_v2_1.h"
 #include "mmhub_v2_0.h"
 #include "athub_v2_0.h"
+#include "athub_v2_1.h"
 /* XXX Move this macro to navi10 header file, which is like vid.h for VI.*/
 #define AMDGPU_NUM_OF_VMIDS			8
 
@@ -1078,6 +1079,9 @@ static int gmc_v10_0_set_clockgating_state(void *handle,
 	if (r)
 		return r;
 
+	if (adev->asic_type == CHIP_SIENNA_CICHLID)
+		return athub_v2_1_set_clockgating(adev, state);
+	else
 		return athub_v2_0_set_clockgating(adev, state);
 }
 
@@ -1087,6 +1091,9 @@ static void gmc_v10_0_get_clockgating_state(void *handle, u32 *flags)
 
 	mmhub_v2_0_get_clockgating(adev, flags);
 
+	if (adev->asic_type == CHIP_SIENNA_CICHLID)
+		athub_v2_1_get_clockgating(adev, flags);
+	else
 		athub_v2_0_get_clockgating(adev, flags);
 }
 

drivers/gpu/drm/amd/amdgpu/mmhub_v2_0.c

@@ -461,6 +461,7 @@ int mmhub_v2_0_set_clockgating(struct amdgpu_device *adev,
 	case CHIP_NAVI10:
 	case CHIP_NAVI14:
 	case CHIP_NAVI12:
+	case CHIP_SIENNA_CICHLID:
 		mmhub_v2_0_update_medium_grain_clock_gating(adev,
 				state == AMD_CG_STATE_GATE);
 		mmhub_v2_0_update_medium_grain_light_sleep(adev,