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Commit 2dba1b5d authored by Thomas Renninger's avatar Thomas Renninger Committed by Len Brown
Browse files

thinkpad_acpi: fingers off backlight if video.ko is serving this functionality 



Signed-off-by: default avatarThomas Renninger <trenn@suse.de>
Acked-by: default avatarZhang Rui <rui.zhang@intel.com>
Acked-by: default avatarHenrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: default avatarAndi Kleen <ak@linux.intel.com>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 540b8bb9

drivers/misc/thinkpad_acpi.c

+19 −10
Original line number Diff line number Diff line
@@ -4932,16 +4932,25 @@ static int __init brightness_init(struct ibm_init_struct *iibm) 
	 */

	b = tpacpi_check_std_acpi_brightness_support();

	if (b > 0) {

		if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {



		if (acpi_video_backlight_support()) {

			if (brightness_enable > 1) {

				printk(TPACPI_NOTICE

				       "Standard ACPI backlight interface "

				       "available, not loading native one.\n");

				return 1;

			} else if (brightness_enable == 1) {

				printk(TPACPI_NOTICE

			       "Lenovo BIOS switched to ACPI backlight "

			       "control mode\n");

				       "Backlight control force enabled, even if standard "

				       "ACPI backlight interface is available\n");

			}

		} else {

			if (brightness_enable > 1) {

				printk(TPACPI_NOTICE

			       "standard ACPI backlight interface "

			       "available, not loading native one...\n");

			return 1;

				       "Standard ACPI backlight interface not "

				       "available, thinkpad_acpi native "

				       "brightness control enabled\n");

			}

		}

	}