drm/amd/pp: Expose the smu support for SDMA PG cntl

SDMA IP can be power up/down via smu message
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/amd_powerplay.c

@@ -1196,6 +1196,21 @@ static void pp_dpm_powergate_acp(void *handle, bool gate)
 	hwmgr->hwmgr_func->powergate_acp(hwmgr, gate);
 }
 
+static void pp_dpm_powergate_sdma(void *handle, bool gate)
+{
+	struct pp_hwmgr *hwmgr = handle;
+
+	if (!hwmgr)
+		return;
+
+	if (hwmgr->hwmgr_func->powergate_sdma == NULL) {
+		pr_info("%s was not implemented.\n", __func__);
+		return;
+	}
+
+	hwmgr->hwmgr_func->powergate_sdma(hwmgr, gate);
+}
+
 static int pp_set_powergating_by_smu(void *handle,
 				uint32_t block_type, bool gate)
 {
@@ -1218,6 +1233,9 @@ static int pp_set_powergating_by_smu(void *handle,
 	case AMD_IP_BLOCK_TYPE_ACP:
 		pp_dpm_powergate_acp(handle, gate);
 		break;
+	case AMD_IP_BLOCK_TYPE_SDMA:
+		pp_dpm_powergate_sdma(handle, gate);
+		break;
 	default:
 		break;
 	}

drivers/gpu/drm/amd/powerplay/hwmgr/smu10_hwmgr.c

@@ -1153,6 +1153,14 @@ static int smu10_powergate_mmhub(struct pp_hwmgr *hwmgr)
 	return smum_send_msg_to_smc(hwmgr, PPSMC_MSG_PowerGateMmHub);
 }
 
+static int smu10_powergate_sdma(struct pp_hwmgr *hwmgr, bool gate)
+{
+	if (gate)
+		return smum_send_msg_to_smc(hwmgr, PPSMC_MSG_PowerDownSdma);
+	else
+		return smum_send_msg_to_smc(hwmgr, PPSMC_MSG_PowerUpSdma);
+}
+
 static void smu10_powergate_vcn(struct pp_hwmgr *hwmgr, bool bgate)
 {
 	if (bgate) {

drivers/gpu/drm/amd/powerplay/inc/hwmgr.h

@@ -328,6 +328,7 @@ struct pp_hwmgr_func {
 	int (*set_power_limit)(struct pp_hwmgr *hwmgr, uint32_t n);
 	int (*powergate_mmhub)(struct pp_hwmgr *hwmgr);
 	int (*smus_notify_pwe)(struct pp_hwmgr *hwmgr);
+	int (*powergate_sdma)(struct pp_hwmgr *hwmgr, bool bgate);
 	int (*enable_mgpu_fan_boost)(struct pp_hwmgr *hwmgr);
 };