499 	hw_level = scale(user_level, 0, user_max, 0, panel->backlight.max);  in clamp_user_to_hw()
500 	hw_level = clamp(hw_level, panel->backlight.min, panel->backlight.max);  in clamp_user_to_hw()
511 	return scale(hw_level, panel->backlight.min, panel->backlight.max,  in scale_hw_to_user()
520 	drm_WARN_ON(&dev_priv->drm, panel->backlight.pwm_level_max == 0);  in intel_panel_invert_pwm_level()
527 		return panel->backlight.pwm_level_max - val + panel->backlight.pwm_level_min;  in intel_panel_invert_pwm_level()
539 	drm_dbg_kms(&i915->drm, "set backlight PWM = %d\n", val);  in intel_panel_set_pwm_level()
540 	panel->backlight.pwm_funcs->set(conn_state, val);  in intel_panel_set_pwm_level()
549 			 panel->backlight.max == 0 || panel->backlight.pwm_level_max == 0);  in intel_panel_backlight_level_to_pwm()
551 	val = scale(val, panel->backlight.min, panel->backlight.max,  in intel_panel_backlight_level_to_pwm()
552 		    panel->backlight.pwm_level_min, panel->backlight.pwm_level_max);  in intel_panel_backlight_level_to_pwm()
563 			 panel->backlight.max == 0 || panel->backlight.pwm_level_max == 0);  in intel_panel_backlight_level_from_pwm()
567 		val = panel->backlight.pwm_level_max - (val - panel->backlight.pwm_level_min);  in intel_panel_backlight_level_from_pwm()
569 	return scale(val, panel->backlight.pwm_level_min, panel->backlight.pwm_level_max,  in intel_panel_backlight_level_from_pwm()
570 		     panel->backlight.min, panel->backlight.max);  in intel_panel_backlight_level_from_pwm()
597 	if (panel->backlight.combination_mode) {  in i9xx_get_backlight()
623 			     BXT_BLC_PWM_DUTY(panel->backlight.controller));  in bxt_get_backlight()
631 	pwm_get_state(panel->backlight.pwm, &state);  in ext_pwm_get_backlight()
661 	drm_WARN_ON(&dev_priv->drm, panel->backlight.pwm_level_max == 0);  in i9xx_set_backlight()
663 	if (panel->backlight.combination_mode) {  in i9xx_set_backlight()
666 		lbpc = level * 0xfe / panel->backlight.pwm_level_max + 1;  in i9xx_set_backlight()
700 		       BXT_BLC_PWM_DUTY(panel->backlight.controller), level);  in bxt_set_backlight()
707 	pwm_set_relative_duty_cycle(&panel->backlight.pwm_state, level, 100);  in ext_pwm_set_backlight()
708 	pwm_apply_state(panel->backlight.pwm, &panel->backlight.pwm_state);  in ext_pwm_set_backlight()
718 	drm_dbg_kms(&i915->drm, "set backlight level = %d\n", level);  in intel_panel_actually_set_backlight()
720 	panel->backlight.funcs->set(conn_state, level);  in intel_panel_actually_set_backlight()
723 /* set backlight brightness to level in range [0..max], assuming hw min is
736 	 * connection_mutex isn't held across the entire backlight  in intel_panel_set_backlight_acpi()
740 	if (!panel->backlight.present || !conn_state->crtc)  in intel_panel_set_backlight_acpi()
745 	drm_WARN_ON(&dev_priv->drm, panel->backlight.max == 0);  in intel_panel_set_backlight_acpi()
748 	panel->backlight.level = hw_level;  in intel_panel_set_backlight_acpi()
750 	if (panel->backlight.device)  in intel_panel_set_backlight_acpi()
751 		panel->backlight.device->props.brightness =  in intel_panel_set_backlight_acpi()
753 					 panel->backlight.level,  in intel_panel_set_backlight_acpi()
754 					 panel->backlight.device->props.max_brightness);  in intel_panel_set_backlight_acpi()
756 	if (panel->backlight.enabled)  in intel_panel_set_backlight_acpi()
781 			    "cpu backlight was enabled, disabling\n");  in lpt_disable_backlight()
845 			    BXT_BLC_PWM_CTL(panel->backlight.controller));  in bxt_disable_backlight()
846 	intel_de_write(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller),  in bxt_disable_backlight()
849 	if (panel->backlight.controller == 1) {  in bxt_disable_backlight()
866 			    BXT_BLC_PWM_CTL(panel->backlight.controller));  in cnp_disable_backlight()
867 	intel_de_write(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller),  in cnp_disable_backlight()
876 	panel->backlight.pwm_state.enabled = false;  in ext_pwm_disable_backlight()
877 	pwm_apply_state(panel->backlight.pwm, &panel->backlight.pwm_state);  in ext_pwm_disable_backlight()
886 	if (!panel->backlight.present)  in intel_panel_disable_backlight()
890 	 * Do not disable backlight on the vga_switcheroo path. When switching  in intel_panel_disable_backlight()
892 	 * backlight. This will leave the backlight on unnecessarily when  in intel_panel_disable_backlight()
897 			    "Skipping backlight disable on vga switch\n");  in intel_panel_disable_backlight()
903 	if (panel->backlight.device)  in intel_panel_disable_backlight()
904 		panel->backlight.device->props.power = FB_BLANK_POWERDOWN;  in intel_panel_disable_backlight()
905 	panel->backlight.enabled = false;  in intel_panel_disable_backlight()
906 	panel->backlight.funcs->disable(old_conn_state, 0);  in intel_panel_disable_backlight()
921 		drm_dbg_kms(&dev_priv->drm, "pch backlight already enabled\n");  in lpt_enable_backlight()
928 		if (panel->backlight.alternate_pwm_increment)  in lpt_enable_backlight()
935 		if (panel->backlight.alternate_pwm_increment)  in lpt_enable_backlight()
942 	pch_ctl2 = panel->backlight.pwm_level_max << 16;  in lpt_enable_backlight()
946 	if (panel->backlight.active_low_pwm)  in lpt_enable_backlight()
973 		drm_dbg_kms(&dev_priv->drm, "cpu backlight already enabled\n");  in pch_enable_backlight()
980 		drm_dbg_kms(&dev_priv->drm, "pch backlight already enabled\n");  in pch_enable_backlight()
996 	pch_ctl2 = panel->backlight.pwm_level_max << 16;  in pch_enable_backlight()
1000 	if (panel->backlight.active_low_pwm)  in pch_enable_backlight()
1019 		drm_dbg_kms(&dev_priv->drm, "backlight already enabled\n");  in i9xx_enable_backlight()
1023 	freq = panel->backlight.pwm_level_max;  in i9xx_enable_backlight()
1024 	if (panel->backlight.combination_mode)  in i9xx_enable_backlight()
1028 	if (panel->backlight.combination_mode)  in i9xx_enable_backlight()
1030 	if (IS_PINEVIEW(dev_priv) && panel->backlight.active_low_pwm)  in i9xx_enable_backlight()
1040 	 * Needed to enable backlight on some 855gm models. BLC_HIST_CTL is  in i9xx_enable_backlight()
1042 	 * that has backlight.  in i9xx_enable_backlight()
1059 		drm_dbg_kms(&dev_priv->drm, "backlight already enabled\n");  in i965_enable_backlight()
1064 	freq = panel->backlight.pwm_level_max;  in i965_enable_backlight()
1065 	if (panel->backlight.combination_mode)  in i965_enable_backlight()
1072 	if (panel->backlight.combination_mode)  in i965_enable_backlight()
1074 	if (panel->backlight.active_low_pwm)  in i965_enable_backlight()
1094 		drm_dbg_kms(&dev_priv->drm, "backlight already enabled\n");  in vlv_enable_backlight()
1099 	ctl = panel->backlight.pwm_level_max << 16;  in vlv_enable_backlight()
1106 	if (panel->backlight.active_low_pwm)  in vlv_enable_backlight()
1124 	if (panel->backlight.controller == 1) {  in bxt_enable_backlight()
1134 		if (panel->backlight.util_pin_active_low)  in bxt_enable_backlight()
1141 				BXT_BLC_PWM_CTL(panel->backlight.controller));  in bxt_enable_backlight()
1143 		drm_dbg_kms(&dev_priv->drm, "backlight already enabled\n");  in bxt_enable_backlight()
1146 			       BXT_BLC_PWM_CTL(panel->backlight.controller),  in bxt_enable_backlight()
1151 		       BXT_BLC_PWM_FREQ(panel->backlight.controller),  in bxt_enable_backlight()
1152 		       panel->backlight.pwm_level_max);  in bxt_enable_backlight()
1157 	if (panel->backlight.active_low_pwm)  in bxt_enable_backlight()
1160 	intel_de_write(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller),  in bxt_enable_backlight()
1163 			      BXT_BLC_PWM_CTL(panel->backlight.controller));  in bxt_enable_backlight()
1164 	intel_de_write(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller),  in bxt_enable_backlight()
1177 				BXT_BLC_PWM_CTL(panel->backlight.controller));  in cnp_enable_backlight()
1179 		drm_dbg_kms(&dev_priv->drm, "backlight already enabled\n");  in cnp_enable_backlight()
1182 			       BXT_BLC_PWM_CTL(panel->backlight.controller),  in cnp_enable_backlight()
1187 		       BXT_BLC_PWM_FREQ(panel->backlight.controller),  in cnp_enable_backlight()
1188 		       panel->backlight.pwm_level_max);  in cnp_enable_backlight()
1193 	if (panel->backlight.active_low_pwm)  in cnp_enable_backlight()
1196 	intel_de_write(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller),  in cnp_enable_backlight()
1199 			      BXT_BLC_PWM_CTL(panel->backlight.controller));  in cnp_enable_backlight()
1200 	intel_de_write(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller),  in cnp_enable_backlight()
1210 	pwm_set_relative_duty_cycle(&panel->backlight.pwm_state, level, 100);  in ext_pwm_enable_backlight()
1211 	panel->backlight.pwm_state.enabled = true;  in ext_pwm_enable_backlight()
1212 	pwm_apply_state(panel->backlight.pwm, &panel->backlight.pwm_state);  in ext_pwm_enable_backlight()
1221 	WARN_ON(panel->backlight.max == 0);  in __intel_panel_enable_backlight()
1223 	if (panel->backlight.level <= panel->backlight.min) {  in __intel_panel_enable_backlight()
1224 		panel->backlight.level = panel->backlight.max;  in __intel_panel_enable_backlight()
1225 		if (panel->backlight.device)  in __intel_panel_enable_backlight()
1226 			panel->backlight.device->props.brightness =  in __intel_panel_enable_backlight()
1228 						 panel->backlight.level,  in __intel_panel_enable_backlight()
1229 						 panel->backlight.device->props.max_brightness);  in __intel_panel_enable_backlight()
1232 	panel->backlight.funcs->enable(crtc_state, conn_state, panel->backlight.level);  in __intel_panel_enable_backlight()
1233 	panel->backlight.enabled = true;  in __intel_panel_enable_backlight()
1234 	if (panel->backlight.device)  in __intel_panel_enable_backlight()
1235 		panel->backlight.device->props.power = FB_BLANK_UNBLANK;  in __intel_panel_enable_backlight()
1246 	if (!panel->backlight.present)  in intel_panel_enable_backlight()
1267 	if (panel->backlight.enabled)  in intel_panel_get_backlight()
1268 		val = panel->backlight.funcs->get(connector, intel_connector_get_pipe(connector));  in intel_panel_get_backlight()
1272 	drm_dbg_kms(&dev_priv->drm, "get backlight PWM = %d\n", val);  in intel_panel_get_backlight()
1283 		     panel->backlight.min, panel->backlight.max);  in scale_user_to_hw()
1286 /* set backlight brightness to level in range [0..max], scaling wrt hw min */
1295 	if (!panel->backlight.present)  in intel_panel_set_backlight()
1300 	drm_WARN_ON(&dev_priv->drm, panel->backlight.max == 0);  in intel_panel_set_backlight()
1303 	panel->backlight.level = hw_level;  in intel_panel_set_backlight()
1305 	if (panel->backlight.enabled)  in intel_panel_set_backlight()
1325 	 * backlight class device does not make it easy to to differentiate  in intel_backlight_device_update_status()
1329 	if (panel->backlight.enabled) {  in intel_backlight_device_update_status()
1330 		if (panel->backlight.power) {  in intel_backlight_device_update_status()
1333 			panel->backlight.power(connector, enable);  in intel_backlight_device_update_status()
1380 	if (WARN_ON(panel->backlight.device))  in intel_backlight_device_register()
1383 	if (!panel->backlight.present)  in intel_backlight_device_register()
1386 	WARN_ON(panel->backlight.max == 0);  in intel_backlight_device_register()
1392 	 * Note: Everything should work even if the backlight device max  in intel_backlight_device_register()
1395 	props.max_brightness = panel->backlight.max;  in intel_backlight_device_register()
1397 					    panel->backlight.level,  in intel_backlight_device_register()
1400 	if (panel->backlight.enabled)  in intel_backlight_device_register()
1414 	 * prevents registration of multiple backlight devices in the  in intel_backlight_device_register()
1416 	 * compatibility. Use unique names for subsequent backlight devices as a  in intel_backlight_device_register()
1421 		name = kasprintf(GFP_KERNEL, "card%d-%s-backlight",  in intel_backlight_device_register()
1432 			"[CONNECTOR:%d:%s] backlight device %s register failed: %ld\n",  in intel_backlight_device_register()
1438 	panel->backlight.device = bd;  in intel_backlight_device_register()
1441 		    "[CONNECTOR:%d:%s] backlight device %s registered\n",  in intel_backlight_device_register()
1454 	if (panel->backlight.device) {  in intel_backlight_device_unregister()
1455 		backlight_device_unregister(panel->backlight.device);  in intel_backlight_device_unregister()
1456 		panel->backlight.device = NULL;  in intel_backlight_device_unregister()
1491 	if (panel->backlight.alternate_pwm_increment)  in spt_hz_to_pwm()
1510 	if (panel->backlight.alternate_pwm_increment)  in lpt_hz_to_pwm()
1537  * clock frequency/32) in total for a complete cycle of modulated backlight
1600 	u16 pwm_freq_hz = dev_priv->vbt.backlight.pwm_freq_hz;  in get_vbt_pwm_freq()
1604 			    "VBT defined backlight frequency %u Hz\n",  in get_vbt_pwm_freq()
1609 			    "default backlight frequency %u Hz\n",  in get_vbt_pwm_freq()
1623 	if (!panel->backlight.pwm_funcs->hz_to_pwm) {  in get_backlight_max_vbt()
1625 			    "backlight frequency conversion not supported\n");  in get_backlight_max_vbt()
1629 	pwm = panel->backlight.pwm_funcs->hz_to_pwm(connector, pwm_freq_hz);  in get_backlight_max_vbt()
1632 			    "backlight frequency conversion failed\n");  in get_backlight_max_vbt()
1648 	drm_WARN_ON(&dev_priv->drm, panel->backlight.pwm_level_max == 0);  in get_backlight_min_vbt()
1657 	min = clamp_t(int, dev_priv->vbt.backlight.min_brightness, 0, 64);  in get_backlight_min_vbt()
1658 	if (min != dev_priv->vbt.backlight.min_brightness) {  in get_backlight_min_vbt()
1660 			    "clamping VBT min backlight %d/255 to %d/255\n",  in get_backlight_min_vbt()
1661 			    dev_priv->vbt.backlight.min_brightness, min);  in get_backlight_min_vbt()
1665 	return scale(min, 0, 255, 0, panel->backlight.pwm_level_max);  in get_backlight_min_vbt()
1679 	panel->backlight.alternate_pwm_increment = alt;  in lpt_setup_backlight()
1682 	panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY;  in lpt_setup_backlight()
1685 	panel->backlight.pwm_level_max = pch_ctl2 >> 16;  in lpt_setup_backlight()
1689 	if (!panel->backlight.pwm_level_max)  in lpt_setup_backlight()
1690 		panel->backlight.pwm_level_max = get_backlight_max_vbt(connector);  in lpt_setup_backlight()
1692 	if (!panel->backlight.pwm_level_max)  in lpt_setup_backlight()
1695 	panel->backlight.pwm_level_min = get_backlight_min_vbt(connector);  in lpt_setup_backlight()
1697 	panel->backlight.pwm_enabled = pch_ctl1 & BLM_PCH_PWM_ENABLE;  in lpt_setup_backlight()
1699 	cpu_mode = panel->backlight.pwm_enabled && HAS_PCH_LPT(dev_priv) &&  in lpt_setup_backlight()
1707 			    "CPU backlight register was enabled, switching to PCH override\n");  in lpt_setup_backlight()
1728 	panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY;  in pch_setup_backlight()
1731 	panel->backlight.pwm_level_max = pch_ctl2 >> 16;  in pch_setup_backlight()
1733 	if (!panel->backlight.pwm_level_max)  in pch_setup_backlight()
1734 		panel->backlight.pwm_level_max = get_backlight_max_vbt(connector);  in pch_setup_backlight()
1736 	if (!panel->backlight.pwm_level_max)  in pch_setup_backlight()
1739 	panel->backlight.pwm_level_min = get_backlight_min_vbt(connector);  in pch_setup_backlight()
1742 	panel->backlight.pwm_enabled = (cpu_ctl2 & BLM_PWM_ENABLE) &&  in pch_setup_backlight()
1757 		panel->backlight.combination_mode = ctl & BLM_LEGACY_MODE;  in i9xx_setup_backlight()
1760 		panel->backlight.active_low_pwm = ctl & BLM_POLARITY_PNV;  in i9xx_setup_backlight()
1762 	panel->backlight.pwm_level_max = ctl >> 17;  in i9xx_setup_backlight()
1764 	if (!panel->backlight.pwm_level_max) {  in i9xx_setup_backlight()
1765 		panel->backlight.pwm_level_max = get_backlight_max_vbt(connector);  in i9xx_setup_backlight()
1766 		panel->backlight.pwm_level_max >>= 1;  in i9xx_setup_backlight()
1769 	if (!panel->backlight.pwm_level_max)  in i9xx_setup_backlight()
1772 	if (panel->backlight.combination_mode)  in i9xx_setup_backlight()
1773 		panel->backlight.pwm_level_max *= 0xff;  in i9xx_setup_backlight()
1775 	panel->backlight.pwm_level_min = get_backlight_min_vbt(connector);  in i9xx_setup_backlight()
1779 	val = clamp(val, panel->backlight.pwm_level_min, panel->backlight.pwm_level_max);  in i9xx_setup_backlight()
1781 	panel->backlight.pwm_enabled = val != 0;  in i9xx_setup_backlight()
1793 	panel->backlight.combination_mode = ctl2 & BLM_COMBINATION_MODE;  in i965_setup_backlight()
1794 	panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965;  in i965_setup_backlight()
1797 	panel->backlight.pwm_level_max = ctl >> 16;  in i965_setup_backlight()
1799 	if (!panel->backlight.pwm_level_max)  in i965_setup_backlight()
1800 		panel->backlight.pwm_level_max = get_backlight_max_vbt(connector);  in i965_setup_backlight()
1802 	if (!panel->backlight.pwm_level_max)  in i965_setup_backlight()
1805 	if (panel->backlight.combination_mode)  in i965_setup_backlight()
1806 		panel->backlight.pwm_level_max *= 0xff;  in i965_setup_backlight()
1808 	panel->backlight.pwm_level_min = get_backlight_min_vbt(connector);  in i965_setup_backlight()
1810 	panel->backlight.pwm_enabled = ctl2 & BLM_PWM_ENABLE;  in i965_setup_backlight()
1825 	panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965;  in vlv_setup_backlight()
1828 	panel->backlight.pwm_level_max = ctl >> 16;  in vlv_setup_backlight()
1830 	if (!panel->backlight.pwm_level_max)  in vlv_setup_backlight()
1831 		panel->backlight.pwm_level_max = get_backlight_max_vbt(connector);  in vlv_setup_backlight()
1833 	if (!panel->backlight.pwm_level_max)  in vlv_setup_backlight()
1836 	panel->backlight.pwm_level_min = get_backlight_min_vbt(connector);  in vlv_setup_backlight()
1838 	panel->backlight.pwm_enabled = ctl2 & BLM_PWM_ENABLE;  in vlv_setup_backlight()
1850 	panel->backlight.controller = dev_priv->vbt.backlight.controller;  in bxt_setup_backlight()
1853 				BXT_BLC_PWM_CTL(panel->backlight.controller));  in bxt_setup_backlight()
1856 	if (panel->backlight.controller == 1) {  in bxt_setup_backlight()
1858 		panel->backlight.util_pin_active_low =  in bxt_setup_backlight()
1862 	panel->backlight.active_low_pwm = pwm_ctl & BXT_BLC_PWM_POLARITY;  in bxt_setup_backlight()
1863 	panel->backlight.pwm_level_max =  in bxt_setup_backlight()
1864 		intel_de_read(dev_priv, BXT_BLC_PWM_FREQ(panel->backlight.controller));  in bxt_setup_backlight()
1866 	if (!panel->backlight.pwm_level_max)  in bxt_setup_backlight()
1867 		panel->backlight.pwm_level_max = get_backlight_max_vbt(connector);  in bxt_setup_backlight()
1869 	if (!panel->backlight.pwm_level_max)  in bxt_setup_backlight()
1872 	panel->backlight.pwm_level_min = get_backlight_min_vbt(connector);  in bxt_setup_backlight()
1874 	panel->backlight.pwm_enabled = pwm_ctl & BXT_BLC_PWM_ENABLE;  in bxt_setup_backlight()
1887 	 * CNP has the BXT implementation of backlight, but with only one  in cnp_setup_backlight()
1891 	panel->backlight.controller = 0;  in cnp_setup_backlight()
1894 				BXT_BLC_PWM_CTL(panel->backlight.controller));  in cnp_setup_backlight()
1896 	panel->backlight.active_low_pwm = pwm_ctl & BXT_BLC_PWM_POLARITY;  in cnp_setup_backlight()
1897 	panel->backlight.pwm_level_max =  in cnp_setup_backlight()
1898 		intel_de_read(dev_priv, BXT_BLC_PWM_FREQ(panel->backlight.controller));  in cnp_setup_backlight()
1900 	if (!panel->backlight.pwm_level_max)  in cnp_setup_backlight()
1901 		panel->backlight.pwm_level_max = get_backlight_max_vbt(connector);  in cnp_setup_backlight()
1903 	if (!panel->backlight.pwm_level_max)  in cnp_setup_backlight()
1906 	panel->backlight.pwm_level_min = get_backlight_min_vbt(connector);  in cnp_setup_backlight()
1908 	panel->backlight.pwm_enabled = pwm_ctl & BXT_BLC_PWM_ENABLE;  in cnp_setup_backlight()
1922 	/* Get the right PWM chip for DSI backlight according to VBT */  in ext_pwm_setup_backlight()
1924 		panel->backlight.pwm = pwm_get(dev->dev, "pwm_pmic_backlight");  in ext_pwm_setup_backlight()
1927 		panel->backlight.pwm = pwm_get(dev->dev, "pwm_soc_backlight");  in ext_pwm_setup_backlight()
1931 	if (IS_ERR(panel->backlight.pwm)) {  in ext_pwm_setup_backlight()
1934 		panel->backlight.pwm = NULL;  in ext_pwm_setup_backlight()
1938 	panel->backlight.pwm_level_max = 100; /* 100% */  in ext_pwm_setup_backlight()
1939 	panel->backlight.pwm_level_min = get_backlight_min_vbt(connector);  in ext_pwm_setup_backlight()
1941 	if (pwm_is_enabled(panel->backlight.pwm)) {  in ext_pwm_setup_backlight()
1943 		pwm_get_state(panel->backlight.pwm, &panel->backlight.pwm_state);  in ext_pwm_setup_backlight()
1945 		level = pwm_get_relative_duty_cycle(&panel->backlight.pwm_state,  in ext_pwm_setup_backlight()
1948 		panel->backlight.pwm_enabled = true;  in ext_pwm_setup_backlight()
1951 			    NSEC_PER_SEC / (unsigned long)panel->backlight.pwm_state.period,  in ext_pwm_setup_backlight()
1955 		panel->backlight.pwm_state.period =  in ext_pwm_setup_backlight()
1959 	drm_info(&dev_priv->drm, "Using %s PWM for LCD backlight control\n",  in ext_pwm_setup_backlight()
1969 	panel->backlight.pwm_funcs->set(conn_state,  in intel_pwm_set_backlight()
1978 					    panel->backlight.pwm_funcs->get(connector, pipe));  in intel_pwm_get_backlight()
1987 	panel->backlight.pwm_funcs->enable(crtc_state, conn_state,  in intel_pwm_enable_backlight()
1996 	panel->backlight.pwm_funcs->disable(conn_state,  in intel_pwm_disable_backlight()
2003 	int ret = panel->backlight.pwm_funcs->setup(connector, pipe);  in intel_pwm_setup_backlight()
2008 	panel->backlight.min = panel->backlight.pwm_level_min;  in intel_pwm_setup_backlight()
2009 	panel->backlight.max = panel->backlight.pwm_level_max;  in intel_pwm_setup_backlight()
2010 	panel->backlight.level = intel_pwm_get_backlight(connector, pipe);  in intel_pwm_setup_backlight()
2011 	panel->backlight.enabled = panel->backlight.pwm_enabled;  in intel_pwm_setup_backlight()
2025 	if (!panel->backlight.present)  in intel_panel_update_backlight()
2029 	if (!panel->backlight.enabled)  in intel_panel_update_backlight()
2042 	if (!dev_priv->vbt.backlight.present) {  in intel_panel_setup_backlight()
2045 				    "no backlight present per VBT, but present per quirk\n");  in intel_panel_setup_backlight()
2048 				    "no backlight present per VBT\n");  in intel_panel_setup_backlight()
2054 	if (drm_WARN_ON(&dev_priv->drm, !panel->backlight.funcs))  in intel_panel_setup_backlight()
2059 	ret = panel->backlight.funcs->setup(intel_connector, pipe);  in intel_panel_setup_backlight()
2064 			    "failed to setup backlight for connector %s\n",  in intel_panel_setup_backlight()
2069 	panel->backlight.present = true;  in intel_panel_setup_backlight()
2072 		    "Connector %s backlight initialized, %s, brightness %u/%u\n",  in intel_panel_setup_backlight()
2074 		    enableddisabled(panel->backlight.enabled),  in intel_panel_setup_backlight()
2075 		    panel->backlight.level, panel->backlight.max);  in intel_panel_setup_backlight()
2083 	if (panel->backlight.pwm)  in intel_panel_destroy_backlight()
2084 		pwm_put(panel->backlight.pwm);  in intel_panel_destroy_backlight()
2086 	panel->backlight.present = false;  in intel_panel_destroy_backlight()
2177 /* Set up chip specific backlight functions */
2190 		panel->backlight.pwm_funcs = &bxt_pwm_funcs;  in intel_panel_init_backlight_funcs()
2192 		panel->backlight.pwm_funcs = &cnp_pwm_funcs;  in intel_panel_init_backlight_funcs()
2195 			panel->backlight.pwm_funcs = &lpt_pwm_funcs;  in intel_panel_init_backlight_funcs()
2197 			panel->backlight.pwm_funcs = &spt_pwm_funcs;  in intel_panel_init_backlight_funcs()
2199 		panel->backlight.pwm_funcs = &pch_pwm_funcs;  in intel_panel_init_backlight_funcs()
2202 			panel->backlight.pwm_funcs = &ext_pwm_funcs;  in intel_panel_init_backlight_funcs()
2204 			panel->backlight.pwm_funcs = &vlv_pwm_funcs;  in intel_panel_init_backlight_funcs()
2207 		panel->backlight.pwm_funcs = &i965_pwm_funcs;  in intel_panel_init_backlight_funcs()
2209 		panel->backlight.pwm_funcs = &i9xx_pwm_funcs;  in intel_panel_init_backlight_funcs()
2216 	/* We're using a standard PWM backlight interface */  in intel_panel_init_backlight_funcs()
2217 	panel->backlight.funcs = &pwm_bl_funcs;  in intel_panel_init_backlight_funcs()