drm/amd/powerplay: set soc floor voltage on boot on vega10.

Send the VBIOS bootup VDDC as a SOC floor voltage to SMU
before populating the PPTABLE. After DPM is enabled, This
floor voltage will be removed. This will prevent SMC from
going to Vmin upon receiving PPTable causing a violation.

Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -387,3 +387,31 @@ int pp_atomfwctrl_get_gpio_information(struct pp_hwmgr *hwmgr,
 
 	return 0;
 }
+
+int pp_atomfwctrl_get_vbios_bootup_values(struct pp_hwmgr *hwmgr,
+			struct pp_atomfwctrl_bios_boot_up_values *boot_values)
+{
+	struct atom_firmware_info_v3_1 *info = NULL;
+	uint16_t ix;
+
+	ix = GetIndexIntoMasterDataTable(firmwareinfo);
+	info = (struct atom_firmware_info_v3_1 *)
+		cgs_atom_get_data_table(hwmgr->device,
+				ix, NULL, NULL, NULL);
+
+	if (!info) {
+		pr_info("Error retrieving BIOS firmwareinfo!");
+		return -EINVAL;
+	}
+
+	boot_values->ulRevision = info->firmware_revision;
+	boot_values->ulGfxClk   = info->bootup_sclk_in10khz;
+	boot_values->ulUClk     = info->bootup_mclk_in10khz;
+	boot_values->ulSocClk   = 0;
+	boot_values->usVddc     = info->bootup_vddc_mv;
+	boot_values->usVddci    = info->bootup_vddci_mv;
+	boot_values->usMvddc    = info->bootup_mvddc_mv;
+	boot_values->usVddGfx   = info->bootup_vddgfx_mv;
+
+	return 0;
+}

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

@@ -119,6 +119,18 @@ struct pp_atomfwctrl_gpio_parameters {
 	uint8_t   ucFwCtfGpio;
 	uint8_t   ucFwCtfPolarity;
 };
+
+struct pp_atomfwctrl_bios_boot_up_values {
+	uint32_t   ulRevision;
+	uint32_t   ulGfxClk;
+	uint32_t   ulUClk;
+	uint32_t   ulSocClk;
+	uint16_t   usVddc;
+	uint16_t   usVddci;
+	uint16_t   usMvddc;
+	uint16_t   usVddGfx;
+};
+
 int pp_atomfwctrl_get_gpu_pll_dividers_vega10(struct pp_hwmgr *hwmgr,
 		uint32_t clock_type, uint32_t clock_value,
 		struct pp_atomfwctrl_clock_dividers_soc15 *dividers);
@@ -136,5 +148,8 @@ int pp_atomfwctrl_get_avfs_information(struct pp_hwmgr *hwmgr,
 int pp_atomfwctrl_get_gpio_information(struct pp_hwmgr *hwmgr,
 		struct pp_atomfwctrl_gpio_parameters *param);
 
+int pp_atomfwctrl_get_vbios_bootup_values(struct pp_hwmgr *hwmgr,
+			struct pp_atomfwctrl_bios_boot_up_values *boot_values);
+
 #endif
 

drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c

@@ -2298,6 +2298,7 @@ static int vega10_init_smc_table(struct pp_hwmgr *hwmgr)
 			(struct phm_ppt_v2_information *)(hwmgr->pptable);
 	PPTable_t *pp_table = &(data->smc_state_table.pp_table);
 	struct pp_atomfwctrl_voltage_table voltage_table;
+	struct pp_atomfwctrl_bios_boot_up_values boot_up_values;
 
 	result = vega10_setup_default_dpm_tables(hwmgr);
 	PP_ASSERT_WITH_CODE(!result,
@@ -2369,6 +2370,24 @@ static int vega10_init_smc_table(struct pp_hwmgr *hwmgr)
 				return result);
 	}
 
+	result = pp_atomfwctrl_get_vbios_bootup_values(hwmgr, &boot_up_values);
+	if (!result) {
+		data->vbios_boot_state.vddc     = boot_up_values.usVddc;
+		data->vbios_boot_state.vddci    = boot_up_values.usVddci;
+		data->vbios_boot_state.mvddc    = boot_up_values.usMvddc;
+		data->vbios_boot_state.gfx_clock = boot_up_values.ulGfxClk;
+		data->vbios_boot_state.mem_clock = boot_up_values.ulUClk;
+		data->vbios_boot_state.soc_clock = boot_up_values.ulSocClk;
+		if (0 != boot_up_values.usVddc) {
+			smum_send_msg_to_smc_with_parameter(hwmgr->smumgr,
+						PPSMC_MSG_SetFloorSocVoltage,
+						(boot_up_values.usVddc * 4));
+			data->vbios_boot_state.bsoc_vddc_lock = true;
+		} else {
+			data->vbios_boot_state.bsoc_vddc_lock = false;
+		}
+	}
+
 	result = vega10_populate_avfs_parameters(hwmgr);
 	PP_ASSERT_WITH_CODE(!result,
 			"Failed to initialize AVFS Parameters!",
@@ -2590,6 +2609,12 @@ static int vega10_start_dpm(struct pp_hwmgr *hwmgr, uint32_t bitmap)
 		data->smu_features[GNLD_LED_DISPLAY].enabled = true;
 	}
 
+	if (data->vbios_boot_state.bsoc_vddc_lock) {
+		smum_send_msg_to_smc_with_parameter(hwmgr->smumgr,
+						PPSMC_MSG_SetFloorSocVoltage, 0);
+		data->vbios_boot_state.bsoc_vddc_lock = false;
+	}
+
 	if (phm_cap_enabled(hwmgr->platform_descriptor.platformCaps,
 			PHM_PlatformCaps_Falcon_QuickTransition)) {
 		if (data->smu_features[GNLD_ACDC].supported) {

drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.h

@@ -177,8 +177,11 @@ struct vega10_dpmlevel_enable_mask {
 };
 
 struct vega10_vbios_boot_state {
+	bool        bsoc_vddc_lock;
 	uint16_t    vddc;
 	uint16_t    vddci;
+	uint16_t    mvddc;
+	uint16_t    vdd_gfx;
 	uint32_t    gfx_clock;
 	uint32_t    mem_clock;
 	uint32_t    soc_clock;