61 	"0: none, 1: output changes, 2: brightness changes, 3: all");
66 	"Set this to 1 on buggy hw which changes the brightness itself when "
67 	"a hotkey is pressed: -1: auto, 0: normal 1: hw-changes-brightness");
193 	u8 _BCL:1;		/* Query list of brightness control levels supported */
194 	u8 _BCM:1;		/* Set the brightness level */
195 	u8 _BQC:1;		/* Get current brightness level */
209 	struct acpi_video_device_brightness *brightness;  member
237 	for (i = ACPI_VIDEO_FIRST_LEVEL; i < vd->brightness->count; i++) {  in acpi_video_get_brightness()
238 		if (vd->brightness->levels[i] == cur_level)  in acpi_video_get_brightness()
246 	int request_level = bd->props.brightness + ACPI_VIDEO_FIRST_LEVEL;  in acpi_video_set_brightness()
251 				vd->brightness->levels[request_level]);  in acpi_video_set_brightness()
266 	*state = video->brightness->count - ACPI_VIDEO_FIRST_LEVEL - 1;  in video_get_max_state()
280 	for (offset = ACPI_VIDEO_FIRST_LEVEL; offset < video->brightness->count;  in video_get_cur_state()
282 		if (level == video->brightness->levels[offset]) {  in video_get_cur_state()
283 			*state = video->brightness->count - offset - 1;  in video_get_cur_state()
297 	if (state >= video->brightness->count - ACPI_VIDEO_FIRST_LEVEL)  in video_set_cur_state()
300 	state = video->brightness->count - state;  in video_set_cur_state()
301 	level = video->brightness->levels[state - 1];  in video_set_cur_state()
361 	device->brightness->curr = level;  in acpi_video_device_lcd_set_level()
362 	for (state = ACPI_VIDEO_FIRST_LEVEL; state < device->brightness->count;  in acpi_video_device_lcd_set_level()
364 		if (level == device->brightness->levels[state]) {  in acpi_video_device_lcd_set_level()
366 				device->backlight->props.brightness =  in acpi_video_device_lcd_set_level()
371 	ACPI_ERROR((AE_INFO, "Current brightness invalid"));  in acpi_video_device_lcd_set_level()
377  * the _BQC return value to get the actual current brightness level
468 	 * Some machines have a broken acpi-video interface for brightness
472 	 * as brightness control does not work.
572 	 * Some machines change the brightness themselves when a brightness
595 	if (device->brightness->flags._BQC_use_index) {  in acpi_video_bqc_value_to_level()
601 		if (device->brightness->flags._BCL_reversed)  in acpi_video_bqc_value_to_level()
602 			bqc_value = device->brightness->count -  in acpi_video_bqc_value_to_level()
605 		level = device->brightness->levels[bqc_value +  in acpi_video_bqc_value_to_level()
641 			     i < device->brightness->count; i++)  in acpi_video_device_lcd_get_level_current()
642 				if (device->brightness->levels[i] == *level) {  in acpi_video_device_lcd_get_level_current()
643 					device->brightness->curr = *level;  in acpi_video_device_lcd_get_level_current()
658 			 * dev->brightness->curr is a cached value which stores  in acpi_video_device_lcd_get_level_current()
668 	*level = device->brightness->curr;  in acpi_video_device_lcd_get_level_current()
726  *		0.	The system BIOS should automatically control the brightness level
729  *			- a brightness hotkey gets pressed (implied by Win7/8 backlight docs)
730  *		1.	The system BIOS should NOT automatically control the brightness
733  *			- a brightness hotkey gets pressed (implied by Win7/8 backlight docs)
771  * brightness level, if the value does not match, find out if it is using
777 	struct acpi_video_device_brightness *br = device->brightness;  in acpi_video_bqc_quirk()
787 	 * Some systems always report current brightness level as maximum  in acpi_video_bqc_quirk()
858 						"LCD brightness level\n"));  in acpi_video_get_levels()
911 	 * are also supported brightness levels that OS should take care of.  in acpi_video_get_levels()
960  *	Maximum brightness level
962  *  Allocate and initialize device->brightness.
976 	device->brightness = br;  in acpi_video_init_brightness()
1018 			  "found %d brightness levels\n",  in acpi_video_init_brightness()
1025 	device->brightness = NULL;  in acpi_video_init_brightness()
1410 	for (i = ACPI_VIDEO_FIRST_LEVEL; i < device->brightness->count; i++) {  in acpi_video_get_next_level()
1411 		l = device->brightness->levels[i];  in acpi_video_get_next_level()
1420 	for (i = ACPI_VIDEO_FIRST_LEVEL; i < device->brightness->count; i++) {  in acpi_video_get_next_level()
1421 		l = device->brightness->levels[i];  in acpi_video_get_next_level()
1460 	if (!device->brightness)  in acpi_video_switch_brightness()
1479 		printk(KERN_ERR PREFIX "Failed to switch the brightness\n");  in acpi_video_switch_brightness()
1580  * preform any automatic brightness change on receiving a notification.
1682 	case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:	/* Cycle brightness */  in acpi_video_device_notify()
1686 	case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:	/* Increase brightness */  in acpi_video_device_notify()
1690 	case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:	/* Decrease brightness */  in acpi_video_device_notify()
1694 	case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:	/* zero brightness */  in acpi_video_device_notify()
1740 		if (video_device && video_device->brightness)  in acpi_video_resume()
1742 					video_device->brightness->curr);  in acpi_video_resume()
1802 		device->brightness->count - ACPI_VIDEO_FIRST_LEVEL - 1;  in acpi_video_dev_register_backlight()
1815 	 * Save current brightness level in case we have to restore it  in acpi_video_dev_register_backlight()
1818 	device->backlight->props.brightness =  in acpi_video_dev_register_backlight()
1908 	if (device->brightness) {  in acpi_video_dev_unregister_backlight()
1909 		kfree(device->brightness->levels);  in acpi_video_dev_unregister_backlight()
1910 		kfree(device->brightness);  in acpi_video_dev_unregister_backlight()
1911 		device->brightness = NULL;  in acpi_video_dev_unregister_backlight()