drm/amd/pp: Add ACP PG support in SMU

when ACP block not enabled, we power off
acp block to save power.

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

@@ -1181,6 +1181,21 @@ static int pp_dpm_powergate_gfx(void *handle, bool gate)
 	return hwmgr->hwmgr_func->powergate_gfx(hwmgr, gate);
 }
 
+static void pp_dpm_powergate_acp(void *handle, bool gate)
+{
+	struct pp_hwmgr *hwmgr = handle;
+
+	if (!hwmgr || !hwmgr->pm_en)
+		return;
+
+	if (hwmgr->hwmgr_func->powergate_acp == NULL) {
+		pr_info("%s was not implemented.\n", __func__);
+		return;
+	}
+
+	hwmgr->hwmgr_func->powergate_acp(hwmgr, gate);
+}
+
 static int pp_set_powergating_by_smu(void *handle,
 				uint32_t block_type, bool gate)
 {
@@ -1200,6 +1215,9 @@ static int pp_set_powergating_by_smu(void *handle,
 	case AMD_IP_BLOCK_TYPE_GFX:
 		ret = pp_dpm_powergate_gfx(handle, gate);
 		break;
+	case AMD_IP_BLOCK_TYPE_ACP:
+		pp_dpm_powergate_acp(handle, gate);
+		break;
 	default:
 		break;
 	}

drivers/gpu/drm/amd/powerplay/hwmgr/smu8_hwmgr.c

@@ -664,8 +664,13 @@ static void smu8_init_power_gate_state(struct pp_hwmgr *hwmgr)
 	data->uvd_power_gated = false;
 	data->vce_power_gated = false;
 	data->samu_power_gated = false;
+#ifdef CONFIG_DRM_AMD_ACP
 	data->acp_power_gated = false;
-	data->pgacpinit = true;
+#else
+	smum_send_msg_to_smc(hwmgr, PPSMC_MSG_ACPPowerOFF);
+	data->acp_power_gated = true;
+#endif
+
 }
 
 static void smu8_init_sclk_threshold(struct pp_hwmgr *hwmgr)
@@ -1886,6 +1891,19 @@ static int smu8_enable_disable_vce_dpm(struct pp_hwmgr *hwmgr, bool enable)
 }
 
 
+static void smu8_dpm_powergate_acp(struct pp_hwmgr *hwmgr, bool bgate)
+{
+	struct smu8_hwmgr *data = hwmgr->backend;
+
+	if (data->acp_power_gated == bgate)
+		return;
+
+	if (bgate)
+		smum_send_msg_to_smc(hwmgr, PPSMC_MSG_ACPPowerOFF);
+	else
+		smum_send_msg_to_smc(hwmgr, PPSMC_MSG_ACPPowerON);
+}
+
 static void smu8_dpm_powergate_uvd(struct pp_hwmgr *hwmgr, bool bgate)
 {
 	struct smu8_hwmgr *data = hwmgr->backend;
@@ -1951,6 +1969,7 @@ static const struct pp_hwmgr_func smu8_hwmgr_funcs = {
 	.powerdown_uvd = smu8_dpm_powerdown_uvd,
 	.powergate_uvd = smu8_dpm_powergate_uvd,
 	.powergate_vce = smu8_dpm_powergate_vce,
+	.powergate_acp = smu8_dpm_powergate_acp,
 	.get_mclk = smu8_dpm_get_mclk,
 	.get_sclk = smu8_dpm_get_sclk,
 	.patch_boot_state = smu8_dpm_patch_boot_state,

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

@@ -247,6 +247,7 @@ struct pp_hwmgr_func {
 	int (*powerdown_uvd)(struct pp_hwmgr *hwmgr);
 	void (*powergate_vce)(struct pp_hwmgr *hwmgr, bool bgate);
 	void (*powergate_uvd)(struct pp_hwmgr *hwmgr, bool bgate);
+	void (*powergate_acp)(struct pp_hwmgr *hwmgr, bool bgate);
 	uint32_t (*get_mclk)(struct pp_hwmgr *hwmgr, bool low);
 	uint32_t (*get_sclk)(struct pp_hwmgr *hwmgr, bool low);
 	int (*power_state_set)(struct pp_hwmgr *hwmgr,