From 1dea1fd09246ada581a99d0669108eea94b7bfee Mon Sep 17 00:00:00 2001 From: Huayi Li Date: Wed, 9 Oct 2013 10:33:02 +0800 Subject: [PATCH] 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 Signed-off-by: Barry Song Signed-off-by: Thierry Reding --- drivers/video/backlight/pwm_bl.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c index f77a7b0..29953349 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 = { -- 2.7.4