diff options
| author | Huayi Li <huayi.li@csr.com> | 2013-10-09 10:33:02 +0800 |
|---|---|---|
| committer | Marcel Ziswiler <marcel.ziswiler@toradex.com> | 2018-03-28 18:40:04 +0200 |
| commit | c610794bd5f3b90231deb7daab8095821c6bee92 (patch) | |
| tree | d5b792bc54808cf084155ba835752ebb603dfbd6 /drivers | |
| parent | 8b58c9edccdbb58ec34df3a41375263a315db2c6 (diff) | |
pwm_backlight: avoid short blank screen while doing hibernation
Use SIMPLE_DEV_PM_OPS macro will initialize the member "freeze"
and "thaw" of pwm_backlight_pm_ops as below,
.freeze = suspend_fn,
.thaw = resume_fn,
then during the process of making hibernation snapshot, screen
will be blank at the moment of freezing, and then light at the
moment of thawing.
this is not the right user experience for suspending to disk.
so this patch drops freeze and thaw callback, make the LCD is
always lighting before the final shutdown.
Signed-off-by: Huayi Li <huayi.li@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
(cherry picked from commit 1dea1fd09246ada581a99d0669108eea94b7bfee)
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/video/backlight/pwm_bl.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c index 5fa9388714c4..1812760201db 100644 --- a/drivers/video/backlight/pwm_bl.c +++ b/drivers/video/backlight/pwm_bl.c @@ -387,8 +387,14 @@ static int pwm_backlight_resume(struct device *dev) } #endif -static SIMPLE_DEV_PM_OPS(pwm_backlight_pm_ops, pwm_backlight_suspend, - pwm_backlight_resume); +static const struct dev_pm_ops pwm_backlight_pm_ops = { +#ifdef CONFIG_PM_SLEEP + .suspend = pwm_backlight_suspend, + .resume = pwm_backlight_resume, + .poweroff = pwm_backlight_suspend, + .restore = pwm_backlight_resume, +#endif +}; static struct platform_driver pwm_backlight_driver = { .driver = { |