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| author |   Michał Kępień <kernel@kempniu.pl> | 2017-04-05 08:49:09 +0200 |
|---|---|---|
| committer |   Darren Hart (VMware) <dvhart@infradead.org> | 2017-04-13 10:16:07 -0700 |
| commit | 5959ddd02be4e435da866ee065187f5c8bccea28 (patch) | |
| tree | 4f780c19b952940d783fdc501ab6d9cd6cc4b8c6 /drivers/platform | |
| parent | platform/x86: fujitsu-laptop: do not log set_lcd_level() failures in bl_update_status() (diff) | |
| download | linux-dev-5959ddd02be4e435da866ee065187f5c8bccea28.tar.xz linux-dev-5959ddd02be4e435da866ee065187f5c8bccea28.zip | |
platform/x86: fujitsu-laptop: account for backlight power when determining brightness
The comment for the get_brightness backlight device callback in
include/linux/backlight.h states that it should "return the current
backlight brightness (accounting for power, fb_blank etc.)".
fujitsu-laptop violates that premise by simply returning the value to
which ACPI function GBLL evaluates to. Make sure 0 is returned when
backlight power is turned off.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Jonathan Woithe <jwoithe@just42.net>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>
Diffstat (limited to 'drivers/platform')
| -rw-r--r-- | drivers/platform/x86/fujitsu-laptop.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/platform/x86/fujitsu-laptop.c b/drivers/platform/x86/fujitsu-laptop.c index af36b15515ed..b88172134063 100644 --- a/drivers/platform/x86/fujitsu-laptop.c +++ b/drivers/platform/x86/fujitsu-laptop.c @@ -423,7 +423,7 @@ static int get_max_brightness(void) static int bl_get_brightness(struct backlight_device *b) { - return get_lcd_level(); + return b->props.power == FB_BLANK_POWERDOWN ? 0 : get_lcd_level(); } static int bl_update_status(struct backlight_device *b) |