drm/amdgpu/powerplay: add set_mp1_state for vega12

This sets the SMU into the proper state for various
operations (shutdown, unload, GPU reset, etc.).
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/hwmgr/vega12_hwmgr.c

@@ -2639,6 +2639,30 @@ static int vega12_get_performance_level(struct pp_hwmgr *hwmgr, const struct pp_
 	return 0;
 }
 
+static int vega12_set_mp1_state(struct pp_hwmgr *hwmgr,
+				enum pp_mp1_state mp1_state)
+{
+	uint16_t msg;
+	int ret;
+
+	switch (mp1_state) {
+	case PP_MP1_STATE_UNLOAD:
+		msg = PPSMC_MSG_PrepareMp1ForUnload;
+		break;
+	case PP_MP1_STATE_SHUTDOWN:
+	case PP_MP1_STATE_RESET:
+	case PP_MP1_STATE_NONE:
+	default:
+		return 0;
+	}
+
+	PP_ASSERT_WITH_CODE((ret = smum_send_msg_to_smc(hwmgr, msg)) == 0,
+			    "[PrepareMp1] Failed!",
+			    return ret);
+
+	return 0;
+}
+
 static const struct pp_hwmgr_func vega12_hwmgr_funcs = {
 	.backend_init = vega12_hwmgr_backend_init,
 	.backend_fini = vega12_hwmgr_backend_fini,
@@ -2695,7 +2719,7 @@ static const struct pp_hwmgr_func vega12_hwmgr_funcs = {
 	.set_asic_baco_state = vega12_baco_set_state,
 	.get_ppfeature_status = vega12_get_ppfeature_status,
 	.set_ppfeature_status = vega12_set_ppfeature_status,
-
+	.set_mp1_state = vega12_set_mp1_state,
 };
 
 int vega12_hwmgr_init(struct pp_hwmgr *hwmgr)