drm/amdgpu: add FGCG support

Add the CG flag for Fine Grained Clock Gating.
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/include/amd_shared.h

@@ -148,6 +148,7 @@ enum amd_powergating_state {
 #define AMD_CG_SUPPORT_ATHUB_MGCG		(1ULL << 29)
 #define AMD_CG_SUPPORT_JPEG_MGCG		(1ULL << 30)
 #define AMD_CG_SUPPORT_GFX_FGCG			(1ULL << 31)
+#define AMD_CG_SUPPORT_REPEATER_FGCG		(1ULL << 32)
 /* PG flags */
 #define AMD_PG_SUPPORT_GFX_PG			(1 << 0)
 #define AMD_PG_SUPPORT_GFX_SMG			(1 << 1)

drivers/gpu/drm/amd/pm/amdgpu_pm.c

@@ -66,6 +66,7 @@ static const struct cg_flag_name clocks[] = {
 	{AMD_CG_SUPPORT_HDP_SD, "Host Data Path Shutdown"},
 	{AMD_CG_SUPPORT_IH_CG, "Interrupt Handler Clock Gating"},
 	{AMD_CG_SUPPORT_JPEG_MGCG, "JPEG Medium Grain Clock Gating"},
+	{AMD_CG_SUPPORT_REPEATER_FGCG, "Repeater Fine Grain Clock Gating"},
 
 	{AMD_CG_SUPPORT_ATHUB_MGCG, "Address Translation Hub Medium Grain Clock Gating"},
 	{AMD_CG_SUPPORT_ATHUB_LS, "Address Translation Hub Light Sleep"},