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linux/drivers/acpi
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Aaron Lu fbc9fe1b4f ACPI / video: Do not register backlight if win8 and native interface exists 
According to Matthew Garrett, "Windows 8 leaves backlight control up
to individual graphics drivers rather than making ACPI calls itself.
There's plenty of evidence to suggest that the Intel driver for
Windows [8] doesn't use the ACPI interface, including the fact that
it's broken on a bunch of machines when the OS claims to support
Windows 8.  The simplest thing to do appears to be to disable the
ACPI backlight interface on these systems".

So for Win8 systems, if there is native backlight control interface
registered by GPU driver, ACPI video does not need to register its own.
Since there are systems that don't work well with this approach, a
parameter for video module named use_native_backlight is introduced and
has the value of false by default. For users who have a broken ACPI
video backlight interface, video.use_native_backlight=1 is needed in
kernel cmdline.

Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-10-16 01:16:04 +02:00
..
acpica ACPICA: Fix for a Store->ArgX when ArgX contains a reference to a field. 2013-09-06 15:39:59 +02:00
apei Merge branch 'x86-ras-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-09-04 11:07:04 -07:00
ac.c ACPI: Remove the old /proc/acpi/event interface 2013-07-15 13:56:36 +02:00
acpi_cmos_rtc.c ACPI: Add CMOS RTC Operation Region handler support 2013-06-27 21:35:37 +02:00
acpi_ipmi.c ACPI / IPMI: Fix atomic context requirement of ipmi_msg_handler() 2013-09-25 03:12:05 +02:00
acpi_lpss.c ACPI / LPSS: don't crash if a device has no MMIO resources 2013-09-02 12:59:40 +02:00
acpi_memhotplug.c ACPI / memhotplug: Fix a stale pointer in error path 2013-07-15 01:26:18 +02:00
acpi_pad.c PTR_RET() is a weird name, and led to some confusing usage. We ended 2013-09-04 17:31:11 -07:00
acpi_platform.c ACPI / scan: Drop unnecessary label from acpi_create_platform_device() 2013-08-07 01:11:33 +02:00
acpi_processor.c ACPI / processor: Acquire writer lock to update CPU maps 2013-08-13 12:20:16 +02:00
battery.c Merge branch 'acpi-assorted' 2013-08-27 01:29:04 +02:00
bgrt.c acpi: bgrt: fix build error due to attribute change 2013-08-22 08:34:39 -07:00
blacklist.c ACPI: add missing win8 OSI comment to blacklist 2013-10-10 02:25:02 +02:00
bus.c Merge branch 'acpi-assorted' 2013-08-27 01:29:04 +02:00
button.c ACPI: Remove the old /proc/acpi/event interface 2013-07-15 13:56:36 +02:00
cm_sbs.c
container.c Merge branch 'acpi-assorted' 2013-04-28 01:54:08 +02:00
custom_method.c The sweeping change is to make add_taint() explicitly indicate whether to disable 2013-02-25 15:41:43 -08:00
debugfs.c acpi: add export.h to files using THIS_MODULE/EXPORT_SYMBOL 2011-10-31 19:30:34 -04:00
device_pm.c ACPI / PM: Add state information to error message in acpi_device_set_power() 2013-08-03 21:13:22 +02:00
dock.c Merge branch 'acpi-assorted' 2013-08-27 01:29:04 +02:00
ec_sys.c ACPI / EC: access user space with get_user()/put_user() 2013-06-19 23:29:20 +02:00
ec.c Merge branch 'acpi-assorted' 2013-08-30 14:13:50 +02:00
event.c ACPI: Remove the old /proc/acpi/event interface 2013-07-15 13:56:36 +02:00
fan.c ACPI / PM: Use ACPI_STATE_D3_COLD instead of ACPI_STATE_D3 everywhere 2013-07-30 14:36:20 +02:00
glue.c ACPI / bind: Prefer device objects with _STA to those without it 2013-09-09 23:07:47 +02:00
hed.c ACPI: Remove useless type argument of driver .remove() operation 2013-01-26 00:37:24 +01:00
internal.h ACPI / video: Do not register backlight if win8 and native interface exists 2013-10-16 01:16:04 +02:00
Kconfig Merge branch 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2013-09-05 09:31:03 -07:00
Makefile i2c: move ACPI helpers into the core 2013-08-23 10:22:29 +02:00
numa.c ACPI / numa: Fix __init attribute location in slit_valid() 2013-08-13 12:35:42 +02:00
nvs.c ACPI / PM: print physical addresses consistently with other parts of kernel 2012-03-30 02:46:57 -04:00
osl.c Merge branch 'acpi-assorted' 2013-08-27 01:29:04 +02:00
pci_irq.c PCI/ACPI: Don't cache _PRT, and don't associate them with bus numbers 2013-02-16 11:58:34 -07:00
pci_link.c ACPI: Set length even for TYPE_END_TAG acpi resource 2013-03-24 01:00:38 +01:00
pci_root.c Merge branch 'pci/misc' into next 2013-08-29 17:23:33 -06:00
pci_slot.c ACPI / PCI: Make bus registration and unregistration symmetric 2013-07-23 03:58:42 +02:00
power.c Merge branch 'acpi-pm' 2013-08-27 01:28:17 +02:00
proc.c ACPI / PM: Walk physical_node_list under physical_node_lock 2013-08-06 02:26:22 +02:00
processor_core.c Merge back earlier 'acpi-assorted' material 2013-08-14 23:22:45 +02:00
processor_driver.c Merge branch 'acpi-processor' 2013-08-27 01:29:24 +02:00
processor_idle.c acpi: delete __cpuinit usage from all acpi files 2013-07-14 19:36:58 -04:00
processor_perflib.c ACPI: introduce helper function acpi_has_method() 2013-07-15 01:33:10 +02:00
processor_thermal.c ACPI / processor: Remove acpi_processor_get_limit_info() 2013-08-13 12:11:22 +02:00
processor_throttling.c ACPI: suppress compiler warnings in processor_throttling.c 2013-03-25 00:05:48 +01:00
reboot.c Revert "ACPI: ignore FADT reset-reg-sup flag" 2012-04-20 11:19:35 -07:00
resource.c ACPI: introduce helper function acpi_has_method() 2013-07-15 01:33:10 +02:00
sbs.c ACPI: Remove the old /proc/acpi/event interface 2013-07-15 13:56:36 +02:00
sbshc.c ACPI: Remove useless type argument of driver .remove() operation 2013-01-26 00:37:24 +01:00
sbshc.h
scan.c ACPI: Use EXPORT_SYMBOL() for acpi_bus_get_device() 2013-10-01 23:02:43 +02:00
sleep.c Merge branch 'acpi-assorted' 2013-08-27 01:29:04 +02:00
sleep.h ACPI: Drop power resources driver 2013-01-17 14:11:06 +01:00
sysfs.c Merge branch 'akpm' (updates from Andrew Morton) 2013-07-03 17:12:13 -07:00
tables.c ACPICA: Cleanup table handler naming conflicts. 2013-01-11 13:10:16 +01:00
thermal.c Merge branch 'acpi-assorted' 2013-08-30 14:13:50 +02:00
utils.c ACPI: introduce two helper functions for _EJ0 and _LCK 2013-07-15 01:33:10 +02:00
video_detect.c ACPI / video: Do not register backlight if win8 and native interface exists 2013-10-16 01:16:04 +02:00
video.c ACPI / video: Do not register backlight if win8 and native interface exists 2013-10-16 01:16:04 +02:00
wakeup.c