4 Commits

Author	SHA1	Message	Date
Zhang Rui	98758faffc	ACPI video: add a warning message if _BQC is not found ... ACPI backlight control w/o _BQC support is kinda firmware bug. Add a warning if _BQC is not implemented. Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>	2009-03-27 22:37:22 -04:00
Roel Kluin	8a383ef0be	ACPI: ec.c, pci_link.c, video_detec.c: static ... Sparse asked whether these could be static. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: Len Brown <len.brown@intel.com>	2008-12-30 23:27:04 -05:00
Len Brown	f398778aa3	Merge branch 'video' into release ... Conflicts: Documentation/kernel-parameters.txt Signed-off-by: Len Brown <len.brown@intel.com>	2008-11-11 21:15:50 -05:00
Thomas Renninger	c3d6de698c	ACPI video: if no ACPI backlight support, use vendor drivers ... If an ACPI graphics device supports backlight brightness functions (cmp. with latest ACPI spec Appendix B), let the ACPI video driver control backlight and switch backlight control off in vendor specific ACPI drivers (asus_acpi, thinkpad_acpi, eeepc, fujitsu_laptop, msi_laptop, sony_laptop, acer-wmi). Currently it is possible to load above drivers and let both poke on the brightness HW registers, the video and vendor specific ACPI drivers -> bad. This patch provides the basic support to check for BIOS capabilities before driver loading time. Driver specific modifications are in separate follow up patches. "acpi_backlight=vendor" Prever vendor driver over ACPI driver for backlight. "acpi_backlight=video" (default) Prever ACPI driver over vendor driver for backlight. Signed-off-by: Thomas Renninger <trenn@suse.de> Acked-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Len Brown <len.brown@intel.com>	2008-11-07 23:57:55 -05:00