1 // SPDX-License-Identifier: MIT
28  * scale - scale values from one range to another
38 static u32 scale(u32 source_val,  in scale()  function
52 	target_val = mul_u32_u32(source_val - source_min,  in scale()
53 				 target_max - target_min);  in scale()
54 	target_val = DIV_ROUND_CLOSEST_ULL(target_val, source_max - source_min);  in scale()
61  * Scale user_level in range [0..user_max] to [0..hw_max], clamping the result
67 	struct intel_panel *panel = &connector->panel;  in clamp_user_to_hw()
70 	hw_level = scale(user_level, 0, user_max, 0, panel->backlight.max);  in clamp_user_to_hw()
71 	hw_level = clamp(hw_level, panel->backlight.min, panel->backlight.max);  in clamp_user_to_hw()
76 /* Scale hw_level in range [hw_min..hw_max] to [0..user_max]. */
80 	struct intel_panel *panel = &connector->panel;  in scale_hw_to_user()
82 	return scale(hw_level, panel->backlight.min, panel->backlight.max,  in scale_hw_to_user()
89 	struct intel_panel *panel = &connector->panel;  in intel_backlight_invert_pwm_level()
91 	drm_WARN_ON(display->drm, panel->backlight.pwm_level_max == 0);  in intel_backlight_invert_pwm_level()
93 	if (display->params.invert_brightness < 0)  in intel_backlight_invert_pwm_level()
96 	if (display->params.invert_brightness > 0 ||  in intel_backlight_invert_pwm_level()
98 		return panel->backlight.pwm_level_max - val + panel->backlight.pwm_level_min;  in intel_backlight_invert_pwm_level()
106 	struct intel_connector *connector = to_intel_connector(conn_state->connector);  in intel_backlight_set_pwm_level()
107 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in intel_backlight_set_pwm_level()
108 	struct intel_panel *panel = &connector->panel;  in intel_backlight_set_pwm_level()
110 	drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] set backlight PWM = %d\n",  in intel_backlight_set_pwm_level()
111 		    connector->base.base.id, connector->base.name, val);  in intel_backlight_set_pwm_level()
112 	panel->backlight.pwm_funcs->set(conn_state, val);  in intel_backlight_set_pwm_level()
117 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in intel_backlight_level_to_pwm()
118 	struct intel_panel *panel = &connector->panel;  in intel_backlight_level_to_pwm()
120 	drm_WARN_ON_ONCE(&i915->drm,  in intel_backlight_level_to_pwm()
121 			 panel->backlight.max == 0 || panel->backlight.pwm_level_max == 0);  in intel_backlight_level_to_pwm()
123 	val = scale(val, panel->backlight.min, panel->backlight.max,  in intel_backlight_level_to_pwm()
124 		    panel->backlight.pwm_level_min, panel->backlight.pwm_level_max);  in intel_backlight_level_to_pwm()
132 	struct intel_panel *panel = &connector->panel;  in intel_backlight_level_from_pwm()
134 	drm_WARN_ON_ONCE(display->drm,  in intel_backlight_level_from_pwm()
135 			 panel->backlight.max == 0 || panel->backlight.pwm_level_max == 0);  in intel_backlight_level_from_pwm()
137 	if (display->params.invert_brightness > 0 ||  in intel_backlight_level_from_pwm()
138 	    (display->params.invert_brightness == 0 &&  in intel_backlight_level_from_pwm()
140 		val = panel->backlight.pwm_level_max - (val - panel->backlight.pwm_level_min);  in intel_backlight_level_from_pwm()
142 	return scale(val, panel->backlight.pwm_level_min, panel->backlight.pwm_level_max,  in intel_backlight_level_from_pwm()
143 		     panel->backlight.min, panel->backlight.max);  in intel_backlight_level_from_pwm()
148 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in lpt_get_backlight()
155 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in pch_get_backlight()
162 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in i9xx_get_backlight()
163 	struct intel_panel *panel = &connector->panel;  in i9xx_get_backlight()
170 	if (panel->backlight.combination_mode) {  in i9xx_get_backlight()
173 		pci_read_config_byte(to_pci_dev(i915->drm.dev), LBPC, &lbpc);  in i9xx_get_backlight()
182 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in vlv_get_backlight()
184 	if (drm_WARN_ON(&i915->drm, pipe != PIPE_A && pipe != PIPE_B))  in vlv_get_backlight()
192 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in bxt_get_backlight()
193 	struct intel_panel *panel = &connector->panel;  in bxt_get_backlight()
195 	return intel_de_read(i915, BXT_BLC_PWM_DUTY(panel->backlight.controller));  in bxt_get_backlight()
200 	struct intel_panel *panel = &connector->panel;  in ext_pwm_get_backlight()
203 	pwm_get_state(panel->backlight.pwm, &state);  in ext_pwm_get_backlight()
209 	struct intel_connector *connector = to_intel_connector(conn_state->connector);  in lpt_set_backlight()
210 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in lpt_set_backlight()
219 	struct intel_connector *connector = to_intel_connector(conn_state->connector);  in pch_set_backlight()
220 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in pch_set_backlight()
229 	struct intel_connector *connector = to_intel_connector(conn_state->connector);  in i9xx_set_backlight()
230 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in i9xx_set_backlight()
231 	struct intel_panel *panel = &connector->panel;  in i9xx_set_backlight()
234 	drm_WARN_ON(&i915->drm, panel->backlight.pwm_level_max == 0);  in i9xx_set_backlight()
236 	if (panel->backlight.combination_mode) {  in i9xx_set_backlight()
239 		lbpc = level * 0xfe / panel->backlight.pwm_level_max + 1;  in i9xx_set_backlight()
241 		pci_write_config_byte(to_pci_dev(i915->drm.dev), LBPC, lbpc);  in i9xx_set_backlight()
257 	struct intel_connector *connector = to_intel_connector(conn_state->connector);  in vlv_set_backlight()
258 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in vlv_set_backlight()
259 	enum pipe pipe = to_intel_crtc(conn_state->crtc)->pipe;  in vlv_set_backlight()
268 	struct intel_connector *connector = to_intel_connector(conn_state->connector);  in bxt_set_backlight()
269 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in bxt_set_backlight()
270 	struct intel_panel *panel = &connector->panel;  in bxt_set_backlight()
272 	intel_de_write(i915, BXT_BLC_PWM_DUTY(panel->backlight.controller), level);  in bxt_set_backlight()
277 	struct intel_panel *panel = &to_intel_connector(conn_state->connector)->panel;  in ext_pwm_set_backlight()
279 	pwm_set_relative_duty_cycle(&panel->backlight.pwm_state, level, 100);  in ext_pwm_set_backlight()
280 	pwm_apply_might_sleep(panel->backlight.pwm, &panel->backlight.pwm_state);  in ext_pwm_set_backlight()
286 	struct intel_connector *connector = to_intel_connector(conn_state->connector);  in intel_panel_actually_set_backlight()
287 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in intel_panel_actually_set_backlight()
288 	struct intel_panel *panel = &connector->panel;  in intel_panel_actually_set_backlight()
290 	drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] set backlight level = %d\n",  in intel_panel_actually_set_backlight()
291 		    connector->base.base.id, connector->base.name, level);  in intel_panel_actually_set_backlight()
293 	panel->backlight.funcs->set(conn_state, level);  in intel_panel_actually_set_backlight()
302 	struct intel_connector *connector = to_intel_connector(conn_state->connector);  in intel_backlight_set_acpi()
303 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in intel_backlight_set_acpi()
304 	struct intel_panel *panel = &connector->panel;  in intel_backlight_set_acpi()
313 	if (!panel->backlight.present || !conn_state->crtc)  in intel_backlight_set_acpi()
316 	mutex_lock(&i915->display.backlight.lock);  in intel_backlight_set_acpi()
318 	drm_WARN_ON(&i915->drm, panel->backlight.max == 0);  in intel_backlight_set_acpi()
321 	panel->backlight.level = hw_level;  in intel_backlight_set_acpi()
323 	if (panel->backlight.device)  in intel_backlight_set_acpi()
324 		panel->backlight.device->props.brightness =  in intel_backlight_set_acpi()
326 					 panel->backlight.level,  in intel_backlight_set_acpi()
327 					 panel->backlight.device->props.max_brightness);  in intel_backlight_set_acpi()
329 	if (panel->backlight.enabled)  in intel_backlight_set_acpi()
332 	mutex_unlock(&i915->display.backlight.lock);  in intel_backlight_set_acpi()
337 	struct intel_connector *connector = to_intel_connector(old_conn_state->connector);  in lpt_disable_backlight()
338 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in lpt_disable_backlight()
353 		drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] CPU backlight was enabled, disabling\n",  in lpt_disable_backlight()
354 			    connector->base.base.id, connector->base.name);  in lpt_disable_backlight()
363 	struct intel_connector *connector = to_intel_connector(old_conn_state->connector);  in pch_disable_backlight()
364 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in pch_disable_backlight()
380 	struct drm_i915_private *i915 = to_i915(old_conn_state->connector->dev);  in i965_disable_backlight()
389 	struct intel_connector *connector = to_intel_connector(old_conn_state->connector);  in vlv_disable_backlight()
390 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in vlv_disable_backlight()
391 	enum pipe pipe = to_intel_crtc(old_conn_state->crtc)->pipe;  in vlv_disable_backlight()
400 	struct intel_connector *connector = to_intel_connector(old_conn_state->connector);  in bxt_disable_backlight()
401 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in bxt_disable_backlight()
402 	struct intel_panel *panel = &connector->panel;  in bxt_disable_backlight()
406 	intel_de_rmw(i915, BXT_BLC_PWM_CTL(panel->backlight.controller),  in bxt_disable_backlight()
409 	if (panel->backlight.controller == 1)  in bxt_disable_backlight()
415 	struct intel_connector *connector = to_intel_connector(old_conn_state->connector);  in cnp_disable_backlight()
416 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in cnp_disable_backlight()
417 	struct intel_panel *panel = &connector->panel;  in cnp_disable_backlight()
421 	intel_de_rmw(i915, BXT_BLC_PWM_CTL(panel->backlight.controller),  in cnp_disable_backlight()
427 	struct intel_connector *connector = to_intel_connector(old_conn_state->connector);  in ext_pwm_disable_backlight()
428 	struct intel_panel *panel = &connector->panel;  in ext_pwm_disable_backlight()
432 	panel->backlight.pwm_state.enabled = false;  in ext_pwm_disable_backlight()
433 	pwm_apply_might_sleep(panel->backlight.pwm, &panel->backlight.pwm_state);  in ext_pwm_disable_backlight()
438 	struct intel_connector *connector = to_intel_connector(old_conn_state->connector);  in intel_backlight_disable()
439 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in intel_backlight_disable()
440 	struct intel_panel *panel = &connector->panel;  in intel_backlight_disable()
442 	if (!panel->backlight.present)  in intel_backlight_disable()
451 	if (i915->drm.switch_power_state == DRM_SWITCH_POWER_CHANGING) {  in intel_backlight_disable()
452 		drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] Skipping backlight disable on vga switch\n",  in intel_backlight_disable()
453 			    connector->base.base.id, connector->base.name);  in intel_backlight_disable()
457 	mutex_lock(&i915->display.backlight.lock);  in intel_backlight_disable()
459 	if (panel->backlight.device)  in intel_backlight_disable()
460 		panel->backlight.device->props.power = BACKLIGHT_POWER_OFF;  in intel_backlight_disable()
461 	panel->backlight.enabled = false;  in intel_backlight_disable()
462 	panel->backlight.funcs->disable(old_conn_state, 0);  in intel_backlight_disable()
464 	mutex_unlock(&i915->display.backlight.lock);  in intel_backlight_disable()
470 	struct intel_connector *connector = to_intel_connector(conn_state->connector);  in lpt_enable_backlight()
471 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in lpt_enable_backlight()
472 	struct intel_panel *panel = &connector->panel;  in lpt_enable_backlight()
477 		drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] PCH backlight already enabled\n",  in lpt_enable_backlight()
478 			    connector->base.base.id, connector->base.name);  in lpt_enable_backlight()
485 			     panel->backlight.alternate_pwm_increment ?  in lpt_enable_backlight()
489 			     panel->backlight.alternate_pwm_increment ?  in lpt_enable_backlight()
492 	pch_ctl2 = panel->backlight.pwm_level_max << 16;  in lpt_enable_backlight()
496 	if (panel->backlight.active_low_pwm)  in lpt_enable_backlight()
514 	struct intel_connector *connector = to_intel_connector(conn_state->connector);  in pch_enable_backlight()
515 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in pch_enable_backlight()
516 	struct intel_panel *panel = &connector->panel;  in pch_enable_backlight()
517 	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;  in pch_enable_backlight()
522 		drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] CPU backlight already enabled\n",  in pch_enable_backlight()
523 			    connector->base.base.id, connector->base.name);  in pch_enable_backlight()
530 		drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] PCH backlight already enabled\n",  in pch_enable_backlight()
531 			    connector->base.base.id, connector->base.name);  in pch_enable_backlight()
547 	pch_ctl2 = panel->backlight.pwm_level_max << 16;  in pch_enable_backlight()
551 	if (panel->backlight.active_low_pwm)  in pch_enable_backlight()
562 	struct intel_connector *connector = to_intel_connector(conn_state->connector);  in i9xx_enable_backlight()
563 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in i9xx_enable_backlight()
564 	struct intel_panel *panel = &connector->panel;  in i9xx_enable_backlight()
569 		drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] backlight already enabled\n",  in i9xx_enable_backlight()
570 			    connector->base.base.id, connector->base.name);  in i9xx_enable_backlight()
574 	freq = panel->backlight.pwm_level_max;  in i9xx_enable_backlight()
575 	if (panel->backlight.combination_mode)  in i9xx_enable_backlight()
579 	if (panel->backlight.combination_mode)  in i9xx_enable_backlight()
581 	if (IS_PINEVIEW(i915) && panel->backlight.active_low_pwm)  in i9xx_enable_backlight()
602 	struct intel_connector *connector = to_intel_connector(conn_state->connector);  in i965_enable_backlight()
603 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in i965_enable_backlight()
604 	struct intel_panel *panel = &connector->panel;  in i965_enable_backlight()
605 	enum pipe pipe = to_intel_crtc(conn_state->crtc)->pipe;  in i965_enable_backlight()
610 		drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] backlight already enabled\n",  in i965_enable_backlight()
611 			    connector->base.base.id, connector->base.name);  in i965_enable_backlight()
616 	freq = panel->backlight.pwm_level_max;  in i965_enable_backlight()
617 	if (panel->backlight.combination_mode)  in i965_enable_backlight()
624 	if (panel->backlight.combination_mode)  in i965_enable_backlight()
626 	if (panel->backlight.active_low_pwm)  in i965_enable_backlight()
638 	struct intel_connector *connector = to_intel_connector(conn_state->connector);  in vlv_enable_backlight()
639 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in vlv_enable_backlight()
640 	struct intel_panel *panel = &connector->panel;  in vlv_enable_backlight()
641 	enum pipe pipe = to_intel_crtc(crtc_state->uapi.crtc)->pipe;  in vlv_enable_backlight()
646 		drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] backlight already enabled\n",  in vlv_enable_backlight()
647 			    connector->base.base.id, connector->base.name);  in vlv_enable_backlight()
652 	ctl = panel->backlight.pwm_level_max << 16;  in vlv_enable_backlight()
659 	if (panel->backlight.active_low_pwm)  in vlv_enable_backlight()
669 	struct intel_connector *connector = to_intel_connector(conn_state->connector);  in bxt_enable_backlight()
670 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in bxt_enable_backlight()
671 	struct intel_panel *panel = &connector->panel;  in bxt_enable_backlight()
672 	enum pipe pipe = to_intel_crtc(crtc_state->uapi.crtc)->pipe;  in bxt_enable_backlight()
676 	if (panel->backlight.controller == 1) {  in bxt_enable_backlight()
679 			drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] utility pin already enabled\n",  in bxt_enable_backlight()
680 				    connector->base.base.id, connector->base.name);  in bxt_enable_backlight()
686 		if (panel->backlight.util_pin_active_low)  in bxt_enable_backlight()
692 	pwm_ctl = intel_de_read(i915, BXT_BLC_PWM_CTL(panel->backlight.controller));  in bxt_enable_backlight()
694 		drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] backlight already enabled\n",  in bxt_enable_backlight()
695 			    connector->base.base.id, connector->base.name);  in bxt_enable_backlight()
697 		intel_de_write(i915, BXT_BLC_PWM_CTL(panel->backlight.controller),  in bxt_enable_backlight()
701 	intel_de_write(i915, BXT_BLC_PWM_FREQ(panel->backlight.controller),  in bxt_enable_backlight()
702 		       panel->backlight.pwm_level_max);  in bxt_enable_backlight()
707 	if (panel->backlight.active_low_pwm)  in bxt_enable_backlight()
710 	intel_de_write(i915, BXT_BLC_PWM_CTL(panel->backlight.controller), pwm_ctl);  in bxt_enable_backlight()
711 	intel_de_posting_read(i915, BXT_BLC_PWM_CTL(panel->backlight.controller));  in bxt_enable_backlight()
712 	intel_de_write(i915, BXT_BLC_PWM_CTL(panel->backlight.controller),  in bxt_enable_backlight()
719 	struct intel_connector *connector = to_intel_connector(conn_state->connector);  in cnp_enable_backlight()
720 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in cnp_enable_backlight()
721 	struct intel_panel *panel = &connector->panel;  in cnp_enable_backlight()
724 	pwm_ctl = intel_de_read(i915, BXT_BLC_PWM_CTL(panel->backlight.controller));  in cnp_enable_backlight()
726 		drm_dbg_kms(&i915->drm, "backlight already enabled\n");  in cnp_enable_backlight()
728 		intel_de_write(i915, BXT_BLC_PWM_CTL(panel->backlight.controller),  in cnp_enable_backlight()
732 	intel_de_write(i915, BXT_BLC_PWM_FREQ(panel->backlight.controller),  in cnp_enable_backlight()
733 		       panel->backlight.pwm_level_max);  in cnp_enable_backlight()
738 	if (panel->backlight.active_low_pwm)  in cnp_enable_backlight()
741 	intel_de_write(i915, BXT_BLC_PWM_CTL(panel->backlight.controller), pwm_ctl);  in cnp_enable_backlight()
742 	intel_de_posting_read(i915, BXT_BLC_PWM_CTL(panel->backlight.controller));  in cnp_enable_backlight()
743 	intel_de_write(i915, BXT_BLC_PWM_CTL(panel->backlight.controller),  in cnp_enable_backlight()
750 	struct intel_connector *connector = to_intel_connector(conn_state->connector);  in ext_pwm_enable_backlight()
751 	struct intel_panel *panel = &connector->panel;  in ext_pwm_enable_backlight()
753 	pwm_set_relative_duty_cycle(&panel->backlight.pwm_state, level, 100);  in ext_pwm_enable_backlight()
754 	panel->backlight.pwm_state.enabled = true;  in ext_pwm_enable_backlight()
755 	pwm_apply_might_sleep(panel->backlight.pwm, &panel->backlight.pwm_state);  in ext_pwm_enable_backlight()
761 	struct intel_connector *connector = to_intel_connector(conn_state->connector);  in __intel_backlight_enable()
762 	struct intel_panel *panel = &connector->panel;  in __intel_backlight_enable()
764 	WARN_ON(panel->backlight.max == 0);  in __intel_backlight_enable()
766 	if (panel->backlight.level < panel->backlight.min) {  in __intel_backlight_enable()
767 		panel->backlight.level = panel->backlight.min;  in __intel_backlight_enable()
768 		if (panel->backlight.device)  in __intel_backlight_enable()
769 			panel->backlight.device->props.brightness =  in __intel_backlight_enable()
771 						 panel->backlight.level,  in __intel_backlight_enable()
772 						 panel->backlight.device->props.max_brightness);  in __intel_backlight_enable()
775 	panel->backlight.funcs->enable(crtc_state, conn_state, panel->backlight.level);  in __intel_backlight_enable()
776 	panel->backlight.enabled = true;  in __intel_backlight_enable()
777 	if (panel->backlight.device)  in __intel_backlight_enable()
778 		panel->backlight.device->props.power = BACKLIGHT_POWER_ON;  in __intel_backlight_enable()
784 	struct intel_connector *connector = to_intel_connector(conn_state->connector);  in intel_backlight_enable()
785 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in intel_backlight_enable()
786 	struct intel_panel *panel = &connector->panel;  in intel_backlight_enable()
787 	enum pipe pipe = to_intel_crtc(crtc_state->uapi.crtc)->pipe;  in intel_backlight_enable()
789 	if (!panel->backlight.present)  in intel_backlight_enable()
792 	drm_dbg_kms(&i915->drm, "pipe %c\n", pipe_name(pipe));  in intel_backlight_enable()
794 	mutex_lock(&i915->display.backlight.lock);  in intel_backlight_enable()
798 	mutex_unlock(&i915->display.backlight.lock);  in intel_backlight_enable()
804 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in intel_panel_get_backlight()
805 	struct intel_panel *panel = &connector->panel;  in intel_panel_get_backlight()
808 	mutex_lock(&i915->display.backlight.lock);  in intel_panel_get_backlight()
810 	if (panel->backlight.enabled)  in intel_panel_get_backlight()
811 		val = panel->backlight.funcs->get(connector, intel_connector_get_pipe(connector));  in intel_panel_get_backlight()
813 	mutex_unlock(&i915->display.backlight.lock);  in intel_panel_get_backlight()
815 	drm_dbg_kms(&i915->drm, "get backlight PWM = %d\n", val);  in intel_panel_get_backlight()
819 /* Scale user_level in range [0..user_max] to [hw_min..hw_max]. */
823 	struct intel_panel *panel = &connector->panel;  in scale_user_to_hw()
825 	return scale(user_level, 0, user_max,  in scale_user_to_hw()
826 		     panel->backlight.min, panel->backlight.max);  in scale_user_to_hw()
833 	struct intel_connector *connector = to_intel_connector(conn_state->connector);  in intel_panel_set_backlight()
834 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in intel_panel_set_backlight()
835 	struct intel_panel *panel = &connector->panel;  in intel_panel_set_backlight()
838 	if (!panel->backlight.present)  in intel_panel_set_backlight()
841 	mutex_lock(&i915->display.backlight.lock);  in intel_panel_set_backlight()
843 	drm_WARN_ON(&i915->drm, panel->backlight.max == 0);  in intel_panel_set_backlight()
846 	panel->backlight.level = hw_level;  in intel_panel_set_backlight()
848 	if (panel->backlight.enabled)  in intel_panel_set_backlight()
851 	mutex_unlock(&i915->display.backlight.lock);  in intel_panel_set_backlight()
857 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in intel_backlight_device_update_status()
858 	struct intel_panel *panel = &connector->panel;  in intel_backlight_device_update_status()
860 	drm_modeset_lock(&i915->drm.mode_config.connection_mutex, NULL);  in intel_backlight_device_update_status()
862 	drm_dbg_kms(&i915->drm, "updating intel_backlight, brightness=%d/%d\n",  in intel_backlight_device_update_status()
863 		    bd->props.brightness, bd->props.max_brightness);  in intel_backlight_device_update_status()
864 	intel_panel_set_backlight(connector->base.state, bd->props.brightness,  in intel_backlight_device_update_status()
865 				  bd->props.max_brightness);  in intel_backlight_device_update_status()
868 	 * Allow flipping bl_power as a sub-state of enabled. Sadly the  in intel_backlight_device_update_status()
873 	if (panel->backlight.enabled) {  in intel_backlight_device_update_status()
874 		if (panel->backlight.power) {  in intel_backlight_device_update_status()
875 			bool enable = bd->props.power == BACKLIGHT_POWER_ON &&  in intel_backlight_device_update_status()
876 				bd->props.brightness != 0;  in intel_backlight_device_update_status()
877 			panel->backlight.power(connector, enable);  in intel_backlight_device_update_status()
880 		bd->props.power = BACKLIGHT_POWER_OFF;  in intel_backlight_device_update_status()
883 	drm_modeset_unlock(&i915->drm.mode_config.connection_mutex);  in intel_backlight_device_update_status()
891 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in intel_backlight_device_get_brightness()
895 	with_intel_runtime_pm(&i915->runtime_pm, wakeref) {  in intel_backlight_device_get_brightness()
898 		drm_modeset_lock(&i915->drm.mode_config.connection_mutex, NULL);  in intel_backlight_device_get_brightness()
902 				       hw_level, bd->props.max_brightness);  in intel_backlight_device_get_brightness()
904 		drm_modeset_unlock(&i915->drm.mode_config.connection_mutex);  in intel_backlight_device_get_brightness()
917 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in intel_backlight_device_register()
918 	struct intel_panel *panel = &connector->panel;  in intel_backlight_device_register()
924 	if (WARN_ON(panel->backlight.device))  in intel_backlight_device_register()
925 		return -ENODEV;  in intel_backlight_device_register()
927 	if (!panel->backlight.present)  in intel_backlight_device_register()
930 	WARN_ON(panel->backlight.max == 0);  in intel_backlight_device_register()
933 		drm_info(&i915->drm, "Skipping intel_backlight registration\n");  in intel_backlight_device_register()
944 	props.max_brightness = panel->backlight.max;  in intel_backlight_device_register()
946 					    panel->backlight.level,  in intel_backlight_device_register()
949 	if (panel->backlight.enabled)  in intel_backlight_device_register()
956 		return -ENOMEM;  in intel_backlight_device_register()
960 		put_device(&bd->dev);  in intel_backlight_device_register()
969 		name = kasprintf(GFP_KERNEL, "card%d-%s-backlight",  in intel_backlight_device_register()
970 				 i915->drm.primary->index, connector->base.name);  in intel_backlight_device_register()
972 			return -ENOMEM;  in intel_backlight_device_register()
974 	bd = backlight_device_register(name, connector->base.kdev, connector,  in intel_backlight_device_register()
978 		drm_err(&i915->drm,  in intel_backlight_device_register()
980 			connector->base.base.id, connector->base.name, name, PTR_ERR(bd));  in intel_backlight_device_register()
985 	panel->backlight.device = bd;  in intel_backlight_device_register()
987 	drm_dbg_kms(&i915->drm,  in intel_backlight_device_register()
989 		    connector->base.base.id, connector->base.name, name);  in intel_backlight_device_register()
999 	struct intel_panel *panel = &connector->panel;  in intel_backlight_device_unregister()
1001 	if (panel->backlight.device) {  in intel_backlight_device_unregister()
1002 		backlight_device_unregister(panel->backlight.device);  in intel_backlight_device_unregister()
1003 		panel->backlight.device = NULL;  in intel_backlight_device_unregister()
1014 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in cnp_hz_to_pwm()
1016 	return DIV_ROUND_CLOSEST(KHz(DISPLAY_RUNTIME_INFO(i915)->rawclk_freq),  in cnp_hz_to_pwm()
1029  * SPT: This value represents the period of the PWM stream in clock periods
1035 	struct intel_panel *panel = &connector->panel;  in spt_hz_to_pwm()
1038 	if (panel->backlight.alternate_pwm_increment)  in spt_hz_to_pwm()
1047  * LPT: This value represents the period of the PWM stream in clock periods
1053 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in lpt_hz_to_pwm()
1054 	struct intel_panel *panel = &connector->panel;  in lpt_hz_to_pwm()
1057 	if (panel->backlight.alternate_pwm_increment)  in lpt_hz_to_pwm()
1071  * ILK/SNB/IVB: This value represents the period of the PWM stream in PCH
1076 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in pch_hz_to_pwm()
1078 	return DIV_ROUND_CLOSEST(KHz(DISPLAY_RUNTIME_INFO(i915)->rawclk_freq),  in pch_hz_to_pwm()
1092 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in i9xx_hz_to_pwm()
1096 		clock = KHz(DISPLAY_RUNTIME_INFO(i915)->rawclk_freq);  in i9xx_hz_to_pwm()
1098 		clock = KHz(i915->display.cdclk.hw.cdclk);  in i9xx_hz_to_pwm()
1104  * Gen4: This value represents the period of the PWM stream in display core
1110 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in i965_hz_to_pwm()
1114 		clock = KHz(DISPLAY_RUNTIME_INFO(i915)->rawclk_freq);  in i965_hz_to_pwm()
1116 		clock = KHz(i915->display.cdclk.hw.cdclk);  in i965_hz_to_pwm()
1122  * VLV: This value represents the period of the PWM stream in display core
1128 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in vlv_hz_to_pwm()
1138 		clock = KHz(DISPLAY_RUNTIME_INFO(i915)->rawclk_freq);  in vlv_hz_to_pwm()
1147 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in get_vbt_pwm_freq()
1148 	u16 pwm_freq_hz = connector->panel.vbt.backlight.pwm_freq_hz;  in get_vbt_pwm_freq()
1151 		drm_dbg_kms(&i915->drm,  in get_vbt_pwm_freq()
1156 		drm_dbg_kms(&i915->drm,  in get_vbt_pwm_freq()
1166 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in get_backlight_max_vbt()
1167 	struct intel_panel *panel = &connector->panel;  in get_backlight_max_vbt()
1171 	if (!panel->backlight.pwm_funcs->hz_to_pwm) {  in get_backlight_max_vbt()
1172 		drm_dbg_kms(&i915->drm,  in get_backlight_max_vbt()
1177 	pwm = panel->backlight.pwm_funcs->hz_to_pwm(connector, pwm_freq_hz);  in get_backlight_max_vbt()
1179 		drm_dbg_kms(&i915->drm,  in get_backlight_max_vbt()
1192 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in get_backlight_min_vbt()
1193 	struct intel_panel *panel = &connector->panel;  in get_backlight_min_vbt()
1196 	drm_WARN_ON(&i915->drm, panel->backlight.pwm_level_max == 0);  in get_backlight_min_vbt()
1205 	min = clamp_t(int, connector->panel.vbt.backlight.min_brightness, 0, 64);  in get_backlight_min_vbt()
1206 	if (min != connector->panel.vbt.backlight.min_brightness) {  in get_backlight_min_vbt()
1207 		drm_dbg_kms(&i915->drm,  in get_backlight_min_vbt()
1209 			    connector->panel.vbt.backlight.min_brightness, min);  in get_backlight_min_vbt()
1213 	return scale(min, 0, 255, 0, panel->backlight.pwm_level_max);  in get_backlight_min_vbt()
1218 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in lpt_setup_backlight()
1219 	struct intel_panel *panel = &connector->panel;  in lpt_setup_backlight()
1227 	panel->backlight.alternate_pwm_increment = alt;  in lpt_setup_backlight()
1230 	panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY;  in lpt_setup_backlight()
1233 	panel->backlight.pwm_level_max = pch_ctl2 >> 16;  in lpt_setup_backlight()
1237 	if (!panel->backlight.pwm_level_max)  in lpt_setup_backlight()
1238 		panel->backlight.pwm_level_max = get_backlight_max_vbt(connector);  in lpt_setup_backlight()
1240 	if (!panel->backlight.pwm_level_max)  in lpt_setup_backlight()
1241 		return -ENODEV;  in lpt_setup_backlight()
1243 	panel->backlight.pwm_level_min = get_backlight_min_vbt(connector);  in lpt_setup_backlight()
1245 	panel->backlight.pwm_enabled = pch_ctl1 & BLM_PCH_PWM_ENABLE;  in lpt_setup_backlight()
1247 	cpu_mode = panel->backlight.pwm_enabled && HAS_PCH_LPT(i915) &&  in lpt_setup_backlight()
1254 		drm_dbg_kms(&i915->drm,  in lpt_setup_backlight()
1258 		lpt_set_backlight(connector->base.state, val);  in lpt_setup_backlight()
1266 	drm_dbg_kms(&i915->drm,  in lpt_setup_backlight()
1268 		    connector->base.base.id, connector->base.name);  in lpt_setup_backlight()
1275 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in pch_setup_backlight()
1276 	struct intel_panel *panel = &connector->panel;  in pch_setup_backlight()
1280 	panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY;  in pch_setup_backlight()
1283 	panel->backlight.pwm_level_max = pch_ctl2 >> 16;  in pch_setup_backlight()
1285 	if (!panel->backlight.pwm_level_max)  in pch_setup_backlight()
1286 		panel->backlight.pwm_level_max = get_backlight_max_vbt(connector);  in pch_setup_backlight()
1288 	if (!panel->backlight.pwm_level_max)  in pch_setup_backlight()
1289 		return -ENODEV;  in pch_setup_backlight()
1291 	panel->backlight.pwm_level_min = get_backlight_min_vbt(connector);  in pch_setup_backlight()
1294 	panel->backlight.pwm_enabled = (cpu_ctl2 & BLM_PWM_ENABLE) &&  in pch_setup_backlight()
1297 	drm_dbg_kms(&i915->drm,  in pch_setup_backlight()
1299 		    connector->base.base.id, connector->base.name);  in pch_setup_backlight()
1306 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in i9xx_setup_backlight()
1307 	struct intel_panel *panel = &connector->panel;  in i9xx_setup_backlight()
1313 		panel->backlight.combination_mode = ctl & BLM_LEGACY_MODE;  in i9xx_setup_backlight()
1316 		panel->backlight.active_low_pwm = ctl & BLM_POLARITY_PNV;  in i9xx_setup_backlight()
1318 	panel->backlight.pwm_level_max = ctl >> 17;  in i9xx_setup_backlight()
1320 	if (!panel->backlight.pwm_level_max) {  in i9xx_setup_backlight()
1321 		panel->backlight.pwm_level_max = get_backlight_max_vbt(connector);  in i9xx_setup_backlight()
1322 		panel->backlight.pwm_level_max >>= 1;  in i9xx_setup_backlight()
1325 	if (!panel->backlight.pwm_level_max)  in i9xx_setup_backlight()
1326 		return -ENODEV;  in i9xx_setup_backlight()
1328 	if (panel->backlight.combination_mode)  in i9xx_setup_backlight()
1329 		panel->backlight.pwm_level_max *= 0xff;  in i9xx_setup_backlight()
1331 	panel->backlight.pwm_level_min = get_backlight_min_vbt(connector);  in i9xx_setup_backlight()
1335 	val = clamp(val, panel->backlight.pwm_level_min, panel->backlight.pwm_level_max);  in i9xx_setup_backlight()
1337 	panel->backlight.pwm_enabled = val != 0;  in i9xx_setup_backlight()
1339 	drm_dbg_kms(&i915->drm,  in i9xx_setup_backlight()
1341 		    connector->base.base.id, connector->base.name);  in i9xx_setup_backlight()
1348 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in i965_setup_backlight()
1349 	struct intel_panel *panel = &connector->panel;  in i965_setup_backlight()
1353 	panel->backlight.combination_mode = ctl2 & BLM_COMBINATION_MODE;  in i965_setup_backlight()
1354 	panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965;  in i965_setup_backlight()
1357 	panel->backlight.pwm_level_max = ctl >> 16;  in i965_setup_backlight()
1359 	if (!panel->backlight.pwm_level_max)  in i965_setup_backlight()
1360 		panel->backlight.pwm_level_max = get_backlight_max_vbt(connector);  in i965_setup_backlight()
1362 	if (!panel->backlight.pwm_level_max)  in i965_setup_backlight()
1363 		return -ENODEV;  in i965_setup_backlight()
1365 	if (panel->backlight.combination_mode)  in i965_setup_backlight()
1366 		panel->backlight.pwm_level_max *= 0xff;  in i965_setup_backlight()
1368 	panel->backlight.pwm_level_min = get_backlight_min_vbt(connector);  in i965_setup_backlight()
1370 	panel->backlight.pwm_enabled = ctl2 & BLM_PWM_ENABLE;  in i965_setup_backlight()
1372 	drm_dbg_kms(&i915->drm,  in i965_setup_backlight()
1374 		    connector->base.base.id, connector->base.name);  in i965_setup_backlight()
1381 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in vlv_setup_backlight()
1382 	struct intel_panel *panel = &connector->panel;  in vlv_setup_backlight()
1385 	if (drm_WARN_ON(&i915->drm, pipe != PIPE_A && pipe != PIPE_B))  in vlv_setup_backlight()
1386 		return -ENODEV;  in vlv_setup_backlight()
1389 	panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965;  in vlv_setup_backlight()
1392 	panel->backlight.pwm_level_max = ctl >> 16;  in vlv_setup_backlight()
1394 	if (!panel->backlight.pwm_level_max)  in vlv_setup_backlight()
1395 		panel->backlight.pwm_level_max = get_backlight_max_vbt(connector);  in vlv_setup_backlight()
1397 	if (!panel->backlight.pwm_level_max)  in vlv_setup_backlight()
1398 		return -ENODEV;  in vlv_setup_backlight()
1400 	panel->backlight.pwm_level_min = get_backlight_min_vbt(connector);  in vlv_setup_backlight()
1402 	panel->backlight.pwm_enabled = ctl2 & BLM_PWM_ENABLE;  in vlv_setup_backlight()
1404 	drm_dbg_kms(&i915->drm,  in vlv_setup_backlight()
1406 		    connector->base.base.id, connector->base.name, pipe_name(pipe));  in vlv_setup_backlight()
1414 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in bxt_setup_backlight()
1415 	struct intel_panel *panel = &connector->panel;  in bxt_setup_backlight()
1418 	panel->backlight.controller = connector->panel.vbt.backlight.controller;  in bxt_setup_backlight()
1421 				BXT_BLC_PWM_CTL(panel->backlight.controller));  in bxt_setup_backlight()
1424 	if (panel->backlight.controller == 1) {  in bxt_setup_backlight()
1426 		panel->backlight.util_pin_active_low =  in bxt_setup_backlight()
1430 	panel->backlight.active_low_pwm = pwm_ctl & BXT_BLC_PWM_POLARITY;  in bxt_setup_backlight()
1431 	panel->backlight.pwm_level_max =  in bxt_setup_backlight()
1432 		intel_de_read(i915, BXT_BLC_PWM_FREQ(panel->backlight.controller));  in bxt_setup_backlight()
1434 	if (!panel->backlight.pwm_level_max)  in bxt_setup_backlight()
1435 		panel->backlight.pwm_level_max = get_backlight_max_vbt(connector);  in bxt_setup_backlight()
1437 	if (!panel->backlight.pwm_level_max)  in bxt_setup_backlight()
1438 		return -ENODEV;  in bxt_setup_backlight()
1440 	panel->backlight.pwm_level_min = get_backlight_min_vbt(connector);  in bxt_setup_backlight()
1442 	panel->backlight.pwm_enabled = pwm_ctl & BXT_BLC_PWM_ENABLE;  in bxt_setup_backlight()
1444 	drm_dbg_kms(&i915->drm,  in bxt_setup_backlight()
1446 		    connector->base.base.id, connector->base.name,  in bxt_setup_backlight()
1447 		    panel->backlight.controller);  in bxt_setup_backlight()
1482 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in cnp_setup_backlight()
1483 	struct intel_panel *panel = &connector->panel;  in cnp_setup_backlight()
1490 	panel->backlight.controller = connector->panel.vbt.backlight.controller;  in cnp_setup_backlight()
1491 	if (!cnp_backlight_controller_is_valid(i915, panel->backlight.controller)) {  in cnp_setup_backlight()
1492 		drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] Invalid backlight controller %d, assuming 0\n",  in cnp_setup_backlight()
1493 			    connector->base.base.id, connector->base.name,  in cnp_setup_backlight()
1494 			    panel->backlight.controller);  in cnp_setup_backlight()
1495 		panel->backlight.controller = 0;  in cnp_setup_backlight()
1499 				BXT_BLC_PWM_CTL(panel->backlight.controller));  in cnp_setup_backlight()
1501 	panel->backlight.active_low_pwm = pwm_ctl & BXT_BLC_PWM_POLARITY;  in cnp_setup_backlight()
1502 	panel->backlight.pwm_level_max =  in cnp_setup_backlight()
1503 		intel_de_read(i915, BXT_BLC_PWM_FREQ(panel->backlight.controller));  in cnp_setup_backlight()
1505 	if (!panel->backlight.pwm_level_max)  in cnp_setup_backlight()
1506 		panel->backlight.pwm_level_max = get_backlight_max_vbt(connector);  in cnp_setup_backlight()
1508 	if (!panel->backlight.pwm_level_max)  in cnp_setup_backlight()
1509 		return -ENODEV;  in cnp_setup_backlight()
1511 	panel->backlight.pwm_level_min = get_backlight_min_vbt(connector);  in cnp_setup_backlight()
1513 	panel->backlight.pwm_enabled = pwm_ctl & BXT_BLC_PWM_ENABLE;  in cnp_setup_backlight()
1515 	drm_dbg_kms(&i915->drm,  in cnp_setup_backlight()
1517 		    connector->base.base.id, connector->base.name,  in cnp_setup_backlight()
1518 		    panel->backlight.controller);  in cnp_setup_backlight()
1526 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in ext_pwm_setup_backlight()
1527 	struct intel_panel *panel = &connector->panel;  in ext_pwm_setup_backlight()
1532 	if (connector->panel.vbt.dsi.config->pwm_blc == PPS_BLC_PMIC) {  in ext_pwm_setup_backlight()
1533 		panel->backlight.pwm = pwm_get(i915->drm.dev, "pwm_pmic_backlight");  in ext_pwm_setup_backlight()
1536 		panel->backlight.pwm = pwm_get(i915->drm.dev, "pwm_soc_backlight");  in ext_pwm_setup_backlight()
1540 	if (IS_ERR(panel->backlight.pwm)) {  in ext_pwm_setup_backlight()
1541 		drm_err(&i915->drm, "[CONNECTOR:%d:%s] Failed to get the %s PWM chip\n",  in ext_pwm_setup_backlight()
1542 			connector->base.base.id, connector->base.name, desc);  in ext_pwm_setup_backlight()
1543 		panel->backlight.pwm = NULL;  in ext_pwm_setup_backlight()
1544 		return -ENODEV;  in ext_pwm_setup_backlight()
1547 	panel->backlight.pwm_level_max = 100; /* 100% */  in ext_pwm_setup_backlight()
1548 	panel->backlight.pwm_level_min = get_backlight_min_vbt(connector);  in ext_pwm_setup_backlight()
1550 	if (pwm_is_enabled(panel->backlight.pwm)) {  in ext_pwm_setup_backlight()
1552 		pwm_get_state(panel->backlight.pwm, &panel->backlight.pwm_state);  in ext_pwm_setup_backlight()
1554 		level = pwm_get_relative_duty_cycle(&panel->backlight.pwm_state,  in ext_pwm_setup_backlight()
1557 		panel->backlight.pwm_enabled = true;  in ext_pwm_setup_backlight()
1559 …drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] PWM already enabled at freq %ld, VBT freq %d, level %d\…  in ext_pwm_setup_backlight()
1560 			    connector->base.base.id, connector->base.name,  in ext_pwm_setup_backlight()
1561 			    NSEC_PER_SEC / (unsigned long)panel->backlight.pwm_state.period,  in ext_pwm_setup_backlight()
1564 		/* Set period from VBT frequency, leave other settings at 0. */  in ext_pwm_setup_backlight()
1565 		panel->backlight.pwm_state.period =  in ext_pwm_setup_backlight()
1569 	drm_dbg_kms(&i915->drm,  in ext_pwm_setup_backlight()
1571 		    connector->base.base.id, connector->base.name, desc);  in ext_pwm_setup_backlight()
1578 	struct intel_connector *connector = to_intel_connector(conn_state->connector);  in intel_pwm_set_backlight()
1579 	struct intel_panel *panel = &connector->panel;  in intel_pwm_set_backlight()
1581 	panel->backlight.pwm_funcs->set(conn_state,  in intel_pwm_set_backlight()
1587 	struct intel_panel *panel = &connector->panel;  in intel_pwm_get_backlight()
1590 					    panel->backlight.pwm_funcs->get(connector, pipe));  in intel_pwm_get_backlight()
1596 	struct intel_connector *connector = to_intel_connector(conn_state->connector);  in intel_pwm_enable_backlight()
1597 	struct intel_panel *panel = &connector->panel;  in intel_pwm_enable_backlight()
1599 	panel->backlight.pwm_funcs->enable(crtc_state, conn_state,  in intel_pwm_enable_backlight()
1605 	struct intel_connector *connector = to_intel_connector(conn_state->connector);  in intel_pwm_disable_backlight()
1606 	struct intel_panel *panel = &connector->panel;  in intel_pwm_disable_backlight()
1608 	panel->backlight.pwm_funcs->disable(conn_state,  in intel_pwm_disable_backlight()
1614 	struct intel_panel *panel = &connector->panel;  in intel_pwm_setup_backlight()
1617 	ret = panel->backlight.pwm_funcs->setup(connector, pipe);  in intel_pwm_setup_backlight()
1621 	panel->backlight.min = panel->backlight.pwm_level_min;  in intel_pwm_setup_backlight()
1622 	panel->backlight.max = panel->backlight.pwm_level_max;  in intel_pwm_setup_backlight()
1623 	panel->backlight.level = intel_pwm_get_backlight(connector, pipe);  in intel_pwm_setup_backlight()
1624 	panel->backlight.enabled = panel->backlight.pwm_enabled;  in intel_pwm_setup_backlight()
1634 	struct intel_connector *connector = to_intel_connector(conn_state->connector);  in intel_backlight_update()
1635 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in intel_backlight_update()
1636 	struct intel_panel *panel = &connector->panel;  in intel_backlight_update()
1638 	if (!panel->backlight.present)  in intel_backlight_update()
1641 	mutex_lock(&i915->display.backlight.lock);  in intel_backlight_update()
1642 	if (!panel->backlight.enabled)  in intel_backlight_update()
1645 	mutex_unlock(&i915->display.backlight.lock);  in intel_backlight_update()
1651 	struct intel_panel *panel = &connector->panel;  in intel_backlight_setup()
1654 	if (!connector->panel.vbt.backlight.present) {  in intel_backlight_setup()
1656 			drm_dbg_kms(display->drm,  in intel_backlight_setup()
1658 				    connector->base.base.id, connector->base.name);  in intel_backlight_setup()
1660 			drm_dbg_kms(display->drm,  in intel_backlight_setup()
1662 				    connector->base.base.id, connector->base.name);  in intel_backlight_setup()
1668 	if (drm_WARN_ON(display->drm, !panel->backlight.funcs))  in intel_backlight_setup()
1669 		return -ENODEV;  in intel_backlight_setup()
1672 	mutex_lock(&display->backlight.lock);  in intel_backlight_setup()
1673 	ret = panel->backlight.funcs->setup(connector, pipe);  in intel_backlight_setup()
1674 	mutex_unlock(&display->backlight.lock);  in intel_backlight_setup()
1677 		drm_dbg_kms(display->drm,  in intel_backlight_setup()
1679 			    connector->base.base.id, connector->base.name);  in intel_backlight_setup()
1683 	panel->backlight.present = true;  in intel_backlight_setup()
1685 	drm_dbg_kms(display->drm,  in intel_backlight_setup()
1687 		    connector->base.base.id, connector->base.name,  in intel_backlight_setup()
1688 		    str_enabled_disabled(panel->backlight.enabled),  in intel_backlight_setup()
1689 		    panel->backlight.level, panel->backlight.max);  in intel_backlight_setup()
1697 	if (panel->backlight.pwm)  in intel_backlight_destroy()
1698 		pwm_put(panel->backlight.pwm);  in intel_backlight_destroy()
1700 	panel->backlight.present = false;  in intel_backlight_destroy()
1796 	struct drm_i915_private *i915 = to_i915(connector->base.dev);  in intel_backlight_init_funcs()
1798 	if (connector->base.connector_type == DRM_MODE_CONNECTOR_DSI &&  in intel_backlight_init_funcs()
1803 		panel->backlight.pwm_funcs = &bxt_pwm_funcs;  in intel_backlight_init_funcs()
1805 		panel->backlight.pwm_funcs = &cnp_pwm_funcs;  in intel_backlight_init_funcs()
1808 			panel->backlight.pwm_funcs = &lpt_pwm_funcs;  in intel_backlight_init_funcs()
1810 			panel->backlight.pwm_funcs = &spt_pwm_funcs;  in intel_backlight_init_funcs()
1812 		panel->backlight.pwm_funcs = &pch_pwm_funcs;  in intel_backlight_init_funcs()
1814 		if (connector->base.connector_type == DRM_MODE_CONNECTOR_DSI) {  in intel_backlight_init_funcs()
1815 			panel->backlight.pwm_funcs = &ext_pwm_funcs;  in intel_backlight_init_funcs()
1817 			panel->backlight.pwm_funcs = &vlv_pwm_funcs;  in intel_backlight_init_funcs()
1820 		panel->backlight.pwm_funcs = &i965_pwm_funcs;  in intel_backlight_init_funcs()
1822 		panel->backlight.pwm_funcs = &i9xx_pwm_funcs;  in intel_backlight_init_funcs()
1825 	if (connector->base.connector_type == DRM_MODE_CONNECTOR_eDP) {  in intel_backlight_init_funcs()
1829 		if (!intel_has_quirk(&i915->display, QUIRK_NO_PPS_BACKLIGHT_POWER_HOOK))  in intel_backlight_init_funcs()
1830 			connector->panel.backlight.power = intel_pps_backlight_power;  in intel_backlight_init_funcs()
1834 	panel->backlight.funcs = &pwm_bl_funcs;  in intel_backlight_init_funcs()