Lines Matching refs:_BQC
195 u8 _BQC:1; /* Get current brightness level */
196 u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */
376 * For some buggy _BQC methods, we need to add a constant value to
377 * the _BQC return value to get the actual current brightness level
424 * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121
606 * _BQC returns an index that doesn't account for the first 2
632 if (device->cap._BQC || device->cap._BCQ) {
633 char *buf = device->cap._BQC ? "_BQC" : "_BCQ";
641 * value returned by _BQC, so don't furtherly
662 device->cap._BQC = device->cap._BCQ = 0;
669 * ACPI video backlight still works w/ buggy _BQC.
673 device->cap._BQC = device->cap._BCQ = 0;
777 * Decides if _BQC/_BCQ for this system is usable
781 * index. If not, clear the _BQC/_BCQ capability.
797 * through _BQC, we need to test another value for them. However,
813 * level 0 is also 100, so we assume _BQC is indexed, when it's not.
815 * This causes all _BQC calls to return bogus values causing weird
838 /* buggy _BQC found, need to find out if it uses index */
847 device->cap._BQC = device->cap._BCQ = 0;
987 /* _BQC uses INDEX while _BCL uses VALUE in some laptops */
990 if (!device->cap._BQC)
1002 * cap._BQC may get cleared due to _BQC is found to be broken
1005 if (!device->cap._BQC)
1010 * On some buggy laptops, _BQC returns an uninitialized
1057 if (acpi_has_method(device->dev->handle, "_BQC")) {
1058 device->cap._BQC = 1;
1060 printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n");