437 		     panel->backlight.min, panel->backlight.max);  in scale_user_to_hw()
448 	hw_level = scale(user_level, 0, user_max, 0, panel->backlight.max);  in clamp_user_to_hw()
449 	hw_level = clamp(hw_level, panel->backlight.min, panel->backlight.max);  in clamp_user_to_hw()
460 	return scale(hw_level, panel->backlight.min, panel->backlight.max,  in scale_hw_to_user()
471 	WARN_ON(panel->backlight.max == 0);  in intel_panel_compute_brightness()
478 		return panel->backlight.max - val;  in intel_panel_compute_brightness()
511 	if (panel->backlight.combination_mode) {  in i9xx_get_backlight()
548 	if (panel->backlight.enabled) {  in intel_panel_get_backlight()
584 	WARN_ON(panel->backlight.max == 0);  in i9xx_set_backlight()
586 	if (panel->backlight.combination_mode) {  in i9xx_set_backlight()
589 		lbpc = level * 0xfe / panel->backlight.max + 1;  in i9xx_set_backlight()
640 	if (!panel->backlight.present)  in intel_panel_set_backlight()
645 	WARN_ON(panel->backlight.max == 0);  in intel_panel_set_backlight()
648 	panel->backlight.level = hw_level;  in intel_panel_set_backlight()
650 	if (panel->backlight.enabled)  in intel_panel_set_backlight()
674 	if (!panel->backlight.present || pipe == INVALID_PIPE)  in intel_panel_set_backlight_acpi()
679 	WARN_ON(panel->backlight.max == 0);  in intel_panel_set_backlight_acpi()
682 	panel->backlight.level = hw_level;  in intel_panel_set_backlight_acpi()
684 	if (panel->backlight.device)  in intel_panel_set_backlight_acpi()
685 		panel->backlight.device->props.brightness =  in intel_panel_set_backlight_acpi()
687 					 panel->backlight.level,  in intel_panel_set_backlight_acpi()
688 					 panel->backlight.device->props.max_brightness);  in intel_panel_set_backlight_acpi()
690 	if (panel->backlight.enabled)  in intel_panel_set_backlight_acpi()
750 	if (!panel->backlight.present)  in intel_panel_disable_backlight()
766 	if (panel->backlight.device)  in intel_panel_disable_backlight()
767 		panel->backlight.device->props.power = FB_BLANK_POWERDOWN;  in intel_panel_disable_backlight()
768 	panel->backlight.enabled = false;  in intel_panel_disable_backlight()
788 	pch_ctl2 = panel->backlight.max << 16;  in bdw_enable_backlight()
792 	if (panel->backlight.active_low_pwm)  in bdw_enable_backlight()
804 	intel_panel_actually_set_backlight(connector, panel->backlight.level);  in bdw_enable_backlight()
840 	intel_panel_actually_set_backlight(connector, panel->backlight.level);  in pch_enable_backlight()
842 	pch_ctl2 = panel->backlight.max << 16;  in pch_enable_backlight()
846 	if (panel->backlight.active_low_pwm)  in pch_enable_backlight()
867 	freq = panel->backlight.max;  in i9xx_enable_backlight()
868 	if (panel->backlight.combination_mode)  in i9xx_enable_backlight()
872 	if (panel->backlight.combination_mode)  in i9xx_enable_backlight()
874 	if (IS_PINEVIEW(dev) && panel->backlight.active_low_pwm)  in i9xx_enable_backlight()
881 	intel_panel_actually_set_backlight(connector, panel->backlight.level);  in i9xx_enable_backlight()
907 	freq = panel->backlight.max;  in i965_enable_backlight()
908 	if (panel->backlight.combination_mode)  in i965_enable_backlight()
915 	if (panel->backlight.combination_mode)  in i965_enable_backlight()
917 	if (panel->backlight.active_low_pwm)  in i965_enable_backlight()
923 	intel_panel_actually_set_backlight(connector, panel->backlight.level);  in i965_enable_backlight()
944 	ctl = panel->backlight.max << 16;  in vlv_enable_backlight()
948 	intel_panel_actually_set_backlight(connector, panel->backlight.level);  in vlv_enable_backlight()
951 	if (panel->backlight.active_low_pwm)  in vlv_enable_backlight()
965 	if (!panel->backlight.present)  in intel_panel_enable_backlight()
972 	WARN_ON(panel->backlight.max == 0);  in intel_panel_enable_backlight()
974 	if (panel->backlight.level <= panel->backlight.min) {  in intel_panel_enable_backlight()
975 		panel->backlight.level = panel->backlight.max;  in intel_panel_enable_backlight()
976 		if (panel->backlight.device)  in intel_panel_enable_backlight()
977 			panel->backlight.device->props.brightness =  in intel_panel_enable_backlight()
979 						 panel->backlight.level,  in intel_panel_enable_backlight()
980 						 panel->backlight.device->props.max_brightness);  in intel_panel_enable_backlight()
984 	panel->backlight.enabled = true;  in intel_panel_enable_backlight()
985 	if (panel->backlight.device)  in intel_panel_enable_backlight()
986 		panel->backlight.device->props.power = FB_BLANK_UNBLANK;  in intel_panel_enable_backlight()
1010 	if (panel->backlight.enabled) {  in intel_backlight_device_update_status()
1054 	if (WARN_ON(panel->backlight.device))  in intel_backlight_device_register()
1057 	if (!panel->backlight.present)  in intel_backlight_device_register()
1060 	WARN_ON(panel->backlight.max == 0);  in intel_backlight_device_register()
1069 	props.max_brightness = panel->backlight.max;  in intel_backlight_device_register()
1071 					    panel->backlight.level,  in intel_backlight_device_register()
1074 	if (panel->backlight.enabled)  in intel_backlight_device_register()
1083 	panel->backlight.device =  in intel_backlight_device_register()
1089 	if (IS_ERR(panel->backlight.device)) {  in intel_backlight_device_register()
1091 			  PTR_ERR(panel->backlight.device));  in intel_backlight_device_register()
1092 		panel->backlight.device = NULL;  in intel_backlight_device_register()
1106 	if (panel->backlight.device) {  in intel_backlight_device_unregister()
1107 		backlight_device_unregister(panel->backlight.device);  in intel_backlight_device_unregister()
1108 		panel->backlight.device = NULL;  in intel_backlight_device_unregister()
1134 	WARN_ON(panel->backlight.max == 0);  in get_backlight_min_vbt()
1143 	min = clamp_t(int, dev_priv->vbt.backlight.min_brightness, 0, 64);  in get_backlight_min_vbt()
1144 	if (min != dev_priv->vbt.backlight.min_brightness) {  in get_backlight_min_vbt()
1146 			      dev_priv->vbt.backlight.min_brightness, min);  in get_backlight_min_vbt()
1150 	return scale(min, 0, 255, 0, panel->backlight.max);  in get_backlight_min_vbt()
1161 	panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY;  in bdw_setup_backlight()
1164 	panel->backlight.max = pch_ctl2 >> 16;  in bdw_setup_backlight()
1165 	if (!panel->backlight.max)  in bdw_setup_backlight()
1168 	panel->backlight.min = get_backlight_min_vbt(connector);  in bdw_setup_backlight()
1171 	panel->backlight.level = intel_panel_compute_brightness(connector, val);  in bdw_setup_backlight()
1173 	panel->backlight.enabled = (pch_ctl1 & BLM_PCH_PWM_ENABLE) &&  in bdw_setup_backlight()
1174 		panel->backlight.level != 0;  in bdw_setup_backlight()
1187 	panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY;  in pch_setup_backlight()
1190 	panel->backlight.max = pch_ctl2 >> 16;  in pch_setup_backlight()
1191 	if (!panel->backlight.max)  in pch_setup_backlight()
1194 	panel->backlight.min = get_backlight_min_vbt(connector);  in pch_setup_backlight()
1197 	panel->backlight.level = intel_panel_compute_brightness(connector, val);  in pch_setup_backlight()
1200 	panel->backlight.enabled = (cpu_ctl2 & BLM_PWM_ENABLE) &&  in pch_setup_backlight()
1201 		(pch_ctl1 & BLM_PCH_PWM_ENABLE) && panel->backlight.level != 0;  in pch_setup_backlight()
1216 		panel->backlight.combination_mode = ctl & BLM_LEGACY_MODE;  in i9xx_setup_backlight()
1219 		panel->backlight.active_low_pwm = ctl & BLM_POLARITY_PNV;  in i9xx_setup_backlight()
1221 	panel->backlight.max = ctl >> 17;  in i9xx_setup_backlight()
1222 	if (panel->backlight.combination_mode)  in i9xx_setup_backlight()
1223 		panel->backlight.max *= 0xff;  in i9xx_setup_backlight()
1225 	if (!panel->backlight.max)  in i9xx_setup_backlight()
1228 	panel->backlight.min = get_backlight_min_vbt(connector);  in i9xx_setup_backlight()
1231 	panel->backlight.level = intel_panel_compute_brightness(connector, val);  in i9xx_setup_backlight()
1233 	panel->backlight.enabled = panel->backlight.level != 0;  in i9xx_setup_backlight()
1246 	panel->backlight.combination_mode = ctl2 & BLM_COMBINATION_MODE;  in i965_setup_backlight()
1247 	panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965;  in i965_setup_backlight()
1250 	panel->backlight.max = ctl >> 16;  in i965_setup_backlight()
1251 	if (panel->backlight.combination_mode)  in i965_setup_backlight()
1252 		panel->backlight.max *= 0xff;  in i965_setup_backlight()
1254 	if (!panel->backlight.max)  in i965_setup_backlight()
1257 	panel->backlight.min = get_backlight_min_vbt(connector);  in i965_setup_backlight()
1260 	panel->backlight.level = intel_panel_compute_brightness(connector, val);  in i965_setup_backlight()
1262 	panel->backlight.enabled = (ctl2 & BLM_PWM_ENABLE) &&  in i965_setup_backlight()
1263 		panel->backlight.level != 0;  in i965_setup_backlight()
1292 	panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965;  in vlv_setup_backlight()
1295 	panel->backlight.max = ctl >> 16;  in vlv_setup_backlight()
1296 	if (!panel->backlight.max)  in vlv_setup_backlight()
1299 	panel->backlight.min = get_backlight_min_vbt(connector);  in vlv_setup_backlight()
1302 	panel->backlight.level = intel_panel_compute_brightness(connector, val);  in vlv_setup_backlight()
1304 	panel->backlight.enabled = (ctl2 & BLM_PWM_ENABLE) &&  in vlv_setup_backlight()
1305 		panel->backlight.level != 0;  in vlv_setup_backlight()
1318 	if (!dev_priv->vbt.backlight.present) {  in intel_panel_setup_backlight()
1338 	panel->backlight.present = true;  in intel_panel_setup_backlight()
1342 		      panel->backlight.enabled ? "enabled" : "disabled",  in intel_panel_setup_backlight()
1343 		      panel->backlight.level, panel->backlight.max);  in intel_panel_setup_backlight()
1353 	panel->backlight.present = false;  in intel_panel_destroy_backlight()