drm/amd/pm: correct VR shared rail info

Add VR shared rail info.
Signed-off-by: Evan Quan <evan.quan@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -5636,7 +5636,9 @@ typedef struct  _ATOM_SMU_INFO_V2_1
 {
   ATOM_COMMON_TABLE_HEADER         asHeader;
   UCHAR ucSclkEntryNum;            // for potential future extend, indicate the number of ATOM_SCLK_FCW_RANGE_ENTRY_V1
-  UCHAR ucReserved[3];
+  UCHAR ucSMUVer;
+  UCHAR ucSharePowerSource;
+  UCHAR ucReserved;
   ATOM_SCLK_FCW_RANGE_ENTRY_V1     asSclkFcwRangeEntry[8];
 }ATOM_SMU_INFO_V2_1;
 

drivers/gpu/drm/amd/pm/inc/smu74_discrete.h

@@ -271,7 +271,8 @@ struct SMU74_Discrete_DpmTable {
 
 	uint8_t                             VRHotLevel;
 	uint8_t                             LdoRefSel;
-	uint8_t                             Reserved1[2];
+	uint8_t                             SharedRails;
+	uint8_t                             Reserved1;
 	uint16_t                            FanStartTemperature;
 	uint16_t                            FanStopTemperature;
 	uint16_t                            MaxVoltage;

drivers/gpu/drm/amd/pm/powerplay/hwmgr/ppatomctrl.c

@@ -1427,6 +1427,20 @@ int atomctrl_get_smc_sclk_range_table(struct pp_hwmgr *hwmgr, struct pp_atom_ctr
 	return 0;
 }
 
+int atomctrl_get_vddc_shared_railinfo(struct pp_hwmgr *hwmgr, uint8_t *shared_rail)
+{
+	ATOM_SMU_INFO_V2_1 *psmu_info =
+		(ATOM_SMU_INFO_V2_1 *)smu_atom_get_data_table(hwmgr->adev,
+			GetIndexIntoMasterTable(DATA, SMU_Info),
+			NULL, NULL, NULL);
+	if (!psmu_info)
+		return -1;
+
+	*shared_rail = psmu_info->ucSharePowerSource;
+
+	return 0;
+}
+
 int atomctrl_get_avfs_information(struct pp_hwmgr *hwmgr,
 				  struct pp_atom_ctrl__avfs_parameters *param)
 {

drivers/gpu/drm/amd/pm/powerplay/hwmgr/ppatomctrl.h

@@ -347,5 +347,6 @@ extern int atomctrl_get_edc_leakage_table(struct pp_hwmgr *hwmgr,
 					  AtomCtrl_EDCLeakgeTable *table,
 					  uint16_t offset);
 
+extern int atomctrl_get_vddc_shared_railinfo(struct pp_hwmgr *hwmgr, uint8_t *shared_rail);
 #endif
 

drivers/gpu/drm/amd/pm/powerplay/smumgr/polaris10_smumgr.c

@@ -1016,6 +1016,16 @@ static int polaris10_populate_single_graphic_level(struct pp_hwmgr *hwmgr,
 	return 0;
 }
 
+static void polaris10_get_vddc_shared_railinfo(struct pp_hwmgr *hwmgr)
+{
+	struct polaris10_smumgr *smu_data = (struct polaris10_smumgr *)(hwmgr->smu_backend);
+	SMU74_Discrete_DpmTable *table = &(smu_data->smc_state_table);
+	uint8_t shared_rail;
+
+	if (!atomctrl_get_vddc_shared_railinfo(hwmgr, &shared_rail))
+		table->SharedRails = shared_rail;
+}
+
 static int polaris10_populate_all_graphic_levels(struct pp_hwmgr *hwmgr)
 {
 	struct smu7_hwmgr *hw_data = (struct smu7_hwmgr *)(hwmgr->backend);
@@ -1041,6 +1051,10 @@ static int polaris10_populate_all_graphic_levels(struct pp_hwmgr *hwmgr)
 	pp_atomctrl_clock_dividers_vi dividers;
 	uint32_t dpm0_sclkfrequency = levels[0].SclkSetting.SclkFrequency;
 
+	if (ASICID_IS_P20(adev->pdev->device, adev->pdev->revision) ||
+	    ASICID_IS_P30(adev->pdev->device, adev->pdev->revision))
+		polaris10_get_vddc_shared_railinfo(hwmgr);
+
 	polaris10_get_sclk_range_table(hwmgr, &(smu_data->smc_state_table));
 
 	for (i = 0; i < dpm_table->sclk_table.count; i++) {