434 		     panel->backlight.min, panel->backlight.max);  in scale_user_to_hw()
445 	hw_level = scale(user_level, 0, user_max, 0, panel->backlight.max);  in clamp_user_to_hw()
446 	hw_level = clamp(hw_level, panel->backlight.min, panel->backlight.max);  in clamp_user_to_hw()
457 	return scale(hw_level, panel->backlight.min, panel->backlight.max,  in scale_hw_to_user()
468 	WARN_ON(panel->backlight.max == 0);  in intel_panel_compute_brightness()
475 		return panel->backlight.max - val;  in intel_panel_compute_brightness()
508 	if (panel->backlight.combination_mode) {  in i9xx_get_backlight()
542 	return I915_READ(BXT_BLC_PWM_DUTY(panel->backlight.controller));  in bxt_get_backlight()
550 	duty_ns = pwm_get_duty_cycle(panel->backlight.pwm);  in pwm_get_backlight()
563 	if (panel->backlight.enabled) {  in intel_panel_get_backlight()
564 		val = panel->backlight.get(connector);  in intel_panel_get_backlight()
599 	WARN_ON(panel->backlight.max == 0);  in i9xx_set_backlight()
601 	if (panel->backlight.combination_mode) {  in i9xx_set_backlight()
604 		lbpc = level * 0xfe / panel->backlight.max + 1;  in i9xx_set_backlight()
640 	I915_WRITE(BXT_BLC_PWM_DUTY(panel->backlight.controller), level);  in bxt_set_backlight()
648 	pwm_config(panel->backlight.pwm, duty_ns, CRC_PMIC_PWM_PERIOD_NS);  in pwm_set_backlight()
659 	panel->backlight.set(connector, level);  in intel_panel_actually_set_backlight()
671 	if (!panel->backlight.present)  in intel_panel_set_backlight()
676 	WARN_ON(panel->backlight.max == 0);  in intel_panel_set_backlight()
679 	panel->backlight.level = hw_level;  in intel_panel_set_backlight()
681 	if (panel->backlight.enabled)  in intel_panel_set_backlight()
705 	if (!panel->backlight.present || pipe == INVALID_PIPE)  in intel_panel_set_backlight_acpi()
710 	WARN_ON(panel->backlight.max == 0);  in intel_panel_set_backlight_acpi()
713 	panel->backlight.level = hw_level;  in intel_panel_set_backlight_acpi()
715 	if (panel->backlight.device)  in intel_panel_set_backlight_acpi()
716 		panel->backlight.device->props.brightness =  in intel_panel_set_backlight_acpi()
718 					 panel->backlight.level,  in intel_panel_set_backlight_acpi()
719 					 panel->backlight.device->props.max_brightness);  in intel_panel_set_backlight_acpi()
721 	if (panel->backlight.enabled)  in intel_panel_set_backlight_acpi()
810 	tmp = I915_READ(BXT_BLC_PWM_CTL(panel->backlight.controller));  in bxt_disable_backlight()
811 	I915_WRITE(BXT_BLC_PWM_CTL(panel->backlight.controller),  in bxt_disable_backlight()
814 	if (panel->backlight.controller == 1) {  in bxt_disable_backlight()
826 	pwm_config(panel->backlight.pwm, 0, CRC_PMIC_PWM_PERIOD_NS);  in pwm_disable_backlight()
828 	pwm_disable(panel->backlight.pwm);  in pwm_disable_backlight()
837 	if (!panel->backlight.present)  in intel_panel_disable_backlight()
853 	if (panel->backlight.device)  in intel_panel_disable_backlight()
854 		panel->backlight.device->props.power = FB_BLANK_POWERDOWN;  in intel_panel_disable_backlight()
855 	panel->backlight.enabled = false;  in intel_panel_disable_backlight()
856 	panel->backlight.disable(connector);  in intel_panel_disable_backlight()
875 	pch_ctl2 = panel->backlight.max << 16;  in lpt_enable_backlight()
879 	if (panel->backlight.active_low_pwm)  in lpt_enable_backlight()
891 	intel_panel_actually_set_backlight(connector, panel->backlight.level);  in lpt_enable_backlight()
927 	intel_panel_actually_set_backlight(connector, panel->backlight.level);  in pch_enable_backlight()
929 	pch_ctl2 = panel->backlight.max << 16;  in pch_enable_backlight()
933 	if (panel->backlight.active_low_pwm)  in pch_enable_backlight()
954 	freq = panel->backlight.max;  in i9xx_enable_backlight()
955 	if (panel->backlight.combination_mode)  in i9xx_enable_backlight()
959 	if (panel->backlight.combination_mode)  in i9xx_enable_backlight()
961 	if (IS_PINEVIEW(dev) && panel->backlight.active_low_pwm)  in i9xx_enable_backlight()
968 	intel_panel_actually_set_backlight(connector, panel->backlight.level);  in i9xx_enable_backlight()
994 	freq = panel->backlight.max;  in i965_enable_backlight()
995 	if (panel->backlight.combination_mode)  in i965_enable_backlight()
1002 	if (panel->backlight.combination_mode)  in i965_enable_backlight()
1004 	if (panel->backlight.active_low_pwm)  in i965_enable_backlight()
1010 	intel_panel_actually_set_backlight(connector, panel->backlight.level);  in i965_enable_backlight()
1031 	ctl = panel->backlight.max << 16;  in vlv_enable_backlight()
1035 	intel_panel_actually_set_backlight(connector, panel->backlight.level);  in vlv_enable_backlight()
1038 	if (panel->backlight.active_low_pwm)  in vlv_enable_backlight()
1057 	if (panel->backlight.controller == 1) {  in bxt_enable_backlight()
1066 		if (panel->backlight.util_pin_active_low)  in bxt_enable_backlight()
1072 	pwm_ctl = I915_READ(BXT_BLC_PWM_CTL(panel->backlight.controller));  in bxt_enable_backlight()
1076 		I915_WRITE(BXT_BLC_PWM_CTL(panel->backlight.controller),  in bxt_enable_backlight()
1080 	I915_WRITE(BXT_BLC_PWM_FREQ(panel->backlight.controller),  in bxt_enable_backlight()
1081 			panel->backlight.max);  in bxt_enable_backlight()
1083 	intel_panel_actually_set_backlight(connector, panel->backlight.level);  in bxt_enable_backlight()
1086 	if (panel->backlight.active_low_pwm)  in bxt_enable_backlight()
1089 	I915_WRITE(BXT_BLC_PWM_CTL(panel->backlight.controller), pwm_ctl);  in bxt_enable_backlight()
1090 	POSTING_READ(BXT_BLC_PWM_CTL(panel->backlight.controller));  in bxt_enable_backlight()
1091 	I915_WRITE(BXT_BLC_PWM_CTL(panel->backlight.controller),  in bxt_enable_backlight()
1099 	pwm_enable(panel->backlight.pwm);  in pwm_enable_backlight()
1100 	intel_panel_actually_set_backlight(connector, panel->backlight.level);  in pwm_enable_backlight()
1110 	if (!panel->backlight.present)  in intel_panel_enable_backlight()
1117 	WARN_ON(panel->backlight.max == 0);  in intel_panel_enable_backlight()
1119 	if (panel->backlight.level <= panel->backlight.min) {  in intel_panel_enable_backlight()
1120 		panel->backlight.level = panel->backlight.max;  in intel_panel_enable_backlight()
1121 		if (panel->backlight.device)  in intel_panel_enable_backlight()
1122 			panel->backlight.device->props.brightness =  in intel_panel_enable_backlight()
1124 						 panel->backlight.level,  in intel_panel_enable_backlight()
1125 						 panel->backlight.device->props.max_brightness);  in intel_panel_enable_backlight()
1128 	panel->backlight.enable(connector);  in intel_panel_enable_backlight()
1129 	panel->backlight.enabled = true;  in intel_panel_enable_backlight()
1130 	if (panel->backlight.device)  in intel_panel_enable_backlight()
1131 		panel->backlight.device->props.power = FB_BLANK_UNBLANK;  in intel_panel_enable_backlight()
1155 	if (panel->backlight.enabled) {  in intel_backlight_device_update_status()
1156 		if (panel->backlight.power) {  in intel_backlight_device_update_status()
1159 			panel->backlight.power(connector, enable);  in intel_backlight_device_update_status()
1199 	if (WARN_ON(panel->backlight.device))  in intel_backlight_device_register()
1202 	if (!panel->backlight.present)  in intel_backlight_device_register()
1205 	WARN_ON(panel->backlight.max == 0);  in intel_backlight_device_register()
1214 	props.max_brightness = panel->backlight.max;  in intel_backlight_device_register()
1216 					    panel->backlight.level,  in intel_backlight_device_register()
1219 	if (panel->backlight.enabled)  in intel_backlight_device_register()
1228 	panel->backlight.device =  in intel_backlight_device_register()
1234 	if (IS_ERR(panel->backlight.device)) {  in intel_backlight_device_register()
1236 			  PTR_ERR(panel->backlight.device));  in intel_backlight_device_register()
1237 		panel->backlight.device = NULL;  in intel_backlight_device_register()
1251 	if (panel->backlight.device) {  in intel_backlight_device_unregister()
1252 		backlight_device_unregister(panel->backlight.device);  in intel_backlight_device_unregister()
1253 		panel->backlight.device = NULL;  in intel_backlight_device_unregister()
1385 	u16 pwm_freq_hz = dev_priv->vbt.backlight.pwm_freq_hz;  in get_backlight_max_vbt()
1393 	if (!panel->backlight.hz_to_pwm) {  in get_backlight_max_vbt()
1398 	pwm = panel->backlight.hz_to_pwm(connector, pwm_freq_hz);  in get_backlight_max_vbt()
1419 	WARN_ON(panel->backlight.max == 0);  in get_backlight_min_vbt()
1428 	min = clamp_t(int, dev_priv->vbt.backlight.min_brightness, 0, 64);  in get_backlight_min_vbt()
1429 	if (min != dev_priv->vbt.backlight.min_brightness) {  in get_backlight_min_vbt()
1431 			      dev_priv->vbt.backlight.min_brightness, min);  in get_backlight_min_vbt()
1435 	return scale(min, 0, 255, 0, panel->backlight.max);  in get_backlight_min_vbt()
1446 	panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY;  in lpt_setup_backlight()
1449 	panel->backlight.max = pch_ctl2 >> 16;  in lpt_setup_backlight()
1451 	if (!panel->backlight.max)  in lpt_setup_backlight()
1452 		panel->backlight.max = get_backlight_max_vbt(connector);  in lpt_setup_backlight()
1454 	if (!panel->backlight.max)  in lpt_setup_backlight()
1457 	panel->backlight.min = get_backlight_min_vbt(connector);  in lpt_setup_backlight()
1460 	panel->backlight.level = intel_panel_compute_brightness(connector, val);  in lpt_setup_backlight()
1462 	panel->backlight.enabled = (pch_ctl1 & BLM_PCH_PWM_ENABLE) &&  in lpt_setup_backlight()
1463 		panel->backlight.level != 0;  in lpt_setup_backlight()
1476 	panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY;  in pch_setup_backlight()
1479 	panel->backlight.max = pch_ctl2 >> 16;  in pch_setup_backlight()
1481 	if (!panel->backlight.max)  in pch_setup_backlight()
1482 		panel->backlight.max = get_backlight_max_vbt(connector);  in pch_setup_backlight()
1484 	if (!panel->backlight.max)  in pch_setup_backlight()
1487 	panel->backlight.min = get_backlight_min_vbt(connector);  in pch_setup_backlight()
1490 	panel->backlight.level = intel_panel_compute_brightness(connector, val);  in pch_setup_backlight()
1493 	panel->backlight.enabled = (cpu_ctl2 & BLM_PWM_ENABLE) &&  in pch_setup_backlight()
1494 		(pch_ctl1 & BLM_PCH_PWM_ENABLE) && panel->backlight.level != 0;  in pch_setup_backlight()
1509 		panel->backlight.combination_mode = ctl & BLM_LEGACY_MODE;  in i9xx_setup_backlight()
1512 		panel->backlight.active_low_pwm = ctl & BLM_POLARITY_PNV;  in i9xx_setup_backlight()
1514 	panel->backlight.max = ctl >> 17;  in i9xx_setup_backlight()
1516 	if (!panel->backlight.max) {  in i9xx_setup_backlight()
1517 		panel->backlight.max = get_backlight_max_vbt(connector);  in i9xx_setup_backlight()
1518 		panel->backlight.max >>= 1;  in i9xx_setup_backlight()
1521 	if (!panel->backlight.max)  in i9xx_setup_backlight()
1524 	if (panel->backlight.combination_mode)  in i9xx_setup_backlight()
1525 		panel->backlight.max *= 0xff;  in i9xx_setup_backlight()
1527 	panel->backlight.min = get_backlight_min_vbt(connector);  in i9xx_setup_backlight()
1530 	panel->backlight.level = intel_panel_compute_brightness(connector, val);  in i9xx_setup_backlight()
1532 	panel->backlight.enabled = panel->backlight.level != 0;  in i9xx_setup_backlight()
1545 	panel->backlight.combination_mode = ctl2 & BLM_COMBINATION_MODE;  in i965_setup_backlight()
1546 	panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965;  in i965_setup_backlight()
1549 	panel->backlight.max = ctl >> 16;  in i965_setup_backlight()
1551 	if (!panel->backlight.max)  in i965_setup_backlight()
1552 		panel->backlight.max = get_backlight_max_vbt(connector);  in i965_setup_backlight()
1554 	if (!panel->backlight.max)  in i965_setup_backlight()
1557 	if (panel->backlight.combination_mode)  in i965_setup_backlight()
1558 		panel->backlight.max *= 0xff;  in i965_setup_backlight()
1560 	panel->backlight.min = get_backlight_min_vbt(connector);  in i965_setup_backlight()
1563 	panel->backlight.level = intel_panel_compute_brightness(connector, val);  in i965_setup_backlight()
1565 	panel->backlight.enabled = (ctl2 & BLM_PWM_ENABLE) &&  in i965_setup_backlight()
1566 		panel->backlight.level != 0;  in i965_setup_backlight()
1582 	panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965;  in vlv_setup_backlight()
1585 	panel->backlight.max = ctl >> 16;  in vlv_setup_backlight()
1587 	if (!panel->backlight.max)  in vlv_setup_backlight()
1588 		panel->backlight.max = get_backlight_max_vbt(connector);  in vlv_setup_backlight()
1590 	if (!panel->backlight.max)  in vlv_setup_backlight()
1593 	panel->backlight.min = get_backlight_min_vbt(connector);  in vlv_setup_backlight()
1596 	panel->backlight.level = intel_panel_compute_brightness(connector, val);  in vlv_setup_backlight()
1598 	panel->backlight.enabled = (ctl2 & BLM_PWM_ENABLE) &&  in vlv_setup_backlight()
1599 		panel->backlight.level != 0;  in vlv_setup_backlight()
1616 	panel->backlight.controller = 0;  in bxt_setup_backlight()
1618 	pwm_ctl = I915_READ(BXT_BLC_PWM_CTL(panel->backlight.controller));  in bxt_setup_backlight()
1625 	if (panel->backlight.controller == 1) {  in bxt_setup_backlight()
1627 		panel->backlight.util_pin_active_low =  in bxt_setup_backlight()
1631 	panel->backlight.active_low_pwm = pwm_ctl & BXT_BLC_PWM_POLARITY;  in bxt_setup_backlight()
1632 	panel->backlight.max =  in bxt_setup_backlight()
1633 		I915_READ(BXT_BLC_PWM_FREQ(panel->backlight.controller));  in bxt_setup_backlight()
1635 	if (!panel->backlight.max)  in bxt_setup_backlight()
1636 		panel->backlight.max = get_backlight_max_vbt(connector);  in bxt_setup_backlight()
1638 	if (!panel->backlight.max)  in bxt_setup_backlight()
1642 	panel->backlight.level = intel_panel_compute_brightness(connector, val);  in bxt_setup_backlight()
1644 	panel->backlight.enabled = (pwm_ctl & BXT_BLC_PWM_ENABLE) &&  in bxt_setup_backlight()
1645 		panel->backlight.level != 0;  in bxt_setup_backlight()
1658 	panel->backlight.pwm = pwm_get(dev->dev, "pwm_backlight");  in pwm_setup_backlight()
1659 	if (IS_ERR(panel->backlight.pwm)) {  in pwm_setup_backlight()
1661 		panel->backlight.pwm = NULL;  in pwm_setup_backlight()
1665 	retval = pwm_config(panel->backlight.pwm, CRC_PMIC_PWM_PERIOD_NS,  in pwm_setup_backlight()
1669 		pwm_put(panel->backlight.pwm);  in pwm_setup_backlight()
1670 		panel->backlight.pwm = NULL;  in pwm_setup_backlight()
1674 	panel->backlight.min = 0; /* 0% */  in pwm_setup_backlight()
1675 	panel->backlight.max = 100; /* 100% */  in pwm_setup_backlight()
1676 	panel->backlight.level = DIV_ROUND_UP(  in pwm_setup_backlight()
1677 				 pwm_get_duty_cycle(panel->backlight.pwm) * 100,  in pwm_setup_backlight()
1679 	panel->backlight.enabled = panel->backlight.level != 0;  in pwm_setup_backlight()
1692 	if (!dev_priv->vbt.backlight.present) {  in intel_panel_setup_backlight()
1702 	if (WARN_ON(!panel->backlight.setup))  in intel_panel_setup_backlight()
1707 	ret = panel->backlight.setup(intel_connector, pipe);  in intel_panel_setup_backlight()
1716 	panel->backlight.present = true;  in intel_panel_setup_backlight()
1720 		      panel->backlight.enabled ? "enabled" : "disabled",  in intel_panel_setup_backlight()
1721 		      panel->backlight.level, panel->backlight.max);  in intel_panel_setup_backlight()
1732 	if (panel->backlight.pwm)  in intel_panel_destroy_backlight()
1733 		pwm_put(panel->backlight.pwm);  in intel_panel_destroy_backlight()
1735 	panel->backlight.present = false;  in intel_panel_destroy_backlight()
1748 		panel->backlight.setup = bxt_setup_backlight;  in intel_panel_init_backlight_funcs()
1749 		panel->backlight.enable = bxt_enable_backlight;  in intel_panel_init_backlight_funcs()
1750 		panel->backlight.disable = bxt_disable_backlight;  in intel_panel_init_backlight_funcs()
1751 		panel->backlight.set = bxt_set_backlight;  in intel_panel_init_backlight_funcs()
1752 		panel->backlight.get = bxt_get_backlight;  in intel_panel_init_backlight_funcs()
1754 		panel->backlight.setup = lpt_setup_backlight;  in intel_panel_init_backlight_funcs()
1755 		panel->backlight.enable = lpt_enable_backlight;  in intel_panel_init_backlight_funcs()
1756 		panel->backlight.disable = lpt_disable_backlight;  in intel_panel_init_backlight_funcs()
1757 		panel->backlight.set = lpt_set_backlight;  in intel_panel_init_backlight_funcs()
1758 		panel->backlight.get = lpt_get_backlight;  in intel_panel_init_backlight_funcs()
1760 			panel->backlight.hz_to_pwm = lpt_hz_to_pwm;  in intel_panel_init_backlight_funcs()
1762 			panel->backlight.hz_to_pwm = spt_hz_to_pwm;  in intel_panel_init_backlight_funcs()
1764 		panel->backlight.setup = pch_setup_backlight;  in intel_panel_init_backlight_funcs()
1765 		panel->backlight.enable = pch_enable_backlight;  in intel_panel_init_backlight_funcs()
1766 		panel->backlight.disable = pch_disable_backlight;  in intel_panel_init_backlight_funcs()
1767 		panel->backlight.set = pch_set_backlight;  in intel_panel_init_backlight_funcs()
1768 		panel->backlight.get = pch_get_backlight;  in intel_panel_init_backlight_funcs()
1769 		panel->backlight.hz_to_pwm = pch_hz_to_pwm;  in intel_panel_init_backlight_funcs()
1772 			panel->backlight.setup = pwm_setup_backlight;  in intel_panel_init_backlight_funcs()
1773 			panel->backlight.enable = pwm_enable_backlight;  in intel_panel_init_backlight_funcs()
1774 			panel->backlight.disable = pwm_disable_backlight;  in intel_panel_init_backlight_funcs()
1775 			panel->backlight.set = pwm_set_backlight;  in intel_panel_init_backlight_funcs()
1776 			panel->backlight.get = pwm_get_backlight;  in intel_panel_init_backlight_funcs()
1778 			panel->backlight.setup = vlv_setup_backlight;  in intel_panel_init_backlight_funcs()
1779 			panel->backlight.enable = vlv_enable_backlight;  in intel_panel_init_backlight_funcs()
1780 			panel->backlight.disable = vlv_disable_backlight;  in intel_panel_init_backlight_funcs()
1781 			panel->backlight.set = vlv_set_backlight;  in intel_panel_init_backlight_funcs()
1782 			panel->backlight.get = vlv_get_backlight;  in intel_panel_init_backlight_funcs()
1783 			panel->backlight.hz_to_pwm = vlv_hz_to_pwm;  in intel_panel_init_backlight_funcs()
1786 		panel->backlight.setup = i965_setup_backlight;  in intel_panel_init_backlight_funcs()
1787 		panel->backlight.enable = i965_enable_backlight;  in intel_panel_init_backlight_funcs()
1788 		panel->backlight.disable = i965_disable_backlight;  in intel_panel_init_backlight_funcs()
1789 		panel->backlight.set = i9xx_set_backlight;  in intel_panel_init_backlight_funcs()
1790 		panel->backlight.get = i9xx_get_backlight;  in intel_panel_init_backlight_funcs()
1791 		panel->backlight.hz_to_pwm = i965_hz_to_pwm;  in intel_panel_init_backlight_funcs()
1793 		panel->backlight.setup = i9xx_setup_backlight;  in intel_panel_init_backlight_funcs()
1794 		panel->backlight.enable = i9xx_enable_backlight;  in intel_panel_init_backlight_funcs()
1795 		panel->backlight.disable = i9xx_disable_backlight;  in intel_panel_init_backlight_funcs()
1796 		panel->backlight.set = i9xx_set_backlight;  in intel_panel_init_backlight_funcs()
1797 		panel->backlight.get = i9xx_get_backlight;  in intel_panel_init_backlight_funcs()
1798 		panel->backlight.hz_to_pwm = i9xx_hz_to_pwm;  in intel_panel_init_backlight_funcs()