linux/drivers/platform/x86
Henrique de Moraes Holschuh 0e501834f8 thinkpad-acpi: rework brightness support
Refactor and redesign the brightness control backend...

In order to fix bugzilla #11750...

Add a new brightness control mode: support direct NVRAM checkpointing
of the backlight level (i.e. store directly to NVRAM without the need
for UCMS calls), and use that together with the EC-based control.
Disallow UCMS+EC, thus avoiding races with the SMM firmware.

Switch the models that define HBRV (EC Brightness Value) in the DSDT
to the new mode.  These are: T40-T43, R50-R52, R50e, R51e, X31-X41.

Change the default for all other IBM ThinkPads to UCMS-only.  The
Lenovo models already default to UCMS-only.

Reported-by: Alexey Fisher <bug-track@fisher-privat.net>
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
2009-04-04 03:14:53 -04:00
..
acer-wmi.c acer-wmi: double free in acer_rfkill_exit() 2009-03-16 00:37:33 -04:00
asus_acpi.c asus_acpi: Add R1F support 2009-01-20 14:34:30 -05:00
asus-laptop.c asus-laptop: restore acpi_generate_proc_event() 2009-03-16 00:37:31 -04:00
compal-laptop.c
dell-laptop.c dell-laptop: move to drivers/platform/x86/ from drivers/misc/ 2009-01-16 14:32:18 -05:00
eeepc-laptop.c eeepc-laptop: restore acpi_generate_proc_event() 2009-03-16 00:37:31 -04:00
fujitsu-laptop.c fujitsu-laptop: Use RFKILL support bitmask from firmware 2009-02-21 21:59:55 -05:00
hp-wmi.c hp-wmi: fix error path in hp_wmi_bios_setup() 2009-02-05 12:56:47 -08:00
intel_menlow.c
Kconfig thinkpad-acpi: restrict access to some firmware LEDs 2009-04-04 03:14:52 -04:00
Makefile dell-laptop: move to drivers/platform/x86/ from drivers/misc/ 2009-01-16 14:32:18 -05:00
msi-laptop.c
panasonic-laptop.c panasonic-laptop: fix X[ ARRAY_SIZE(X) ] 2009-01-17 20:20:13 -05:00
sony-laptop.c
tc1100-wmi.c
thinkpad_acpi.c thinkpad-acpi: rework brightness support 2009-04-04 03:14:53 -04:00
toshiba_acpi.c
wmi.c acpi-wmi: unsigned cannot be less than 0 2009-03-16 00:38:24 -04:00