On Tue, Nov 01, 2016 at 02:59:33PM +0200, Peter Ujfalusi wrote: > If the pwm is not enabled the backlight initially should not be enabled > either if we have booted with DT and there is a phandle pointing to the > backlight node. > > The patch extends the checks to decide if we should keep the backlight off > initially. > > Signed-off-by: Peter Ujfalusi <peter.ujfalusi@xxxxxx> > --- > drivers/video/backlight/pwm_bl.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c > index 4b07da278b4f..f680f7b033b2 100644 > --- a/drivers/video/backlight/pwm_bl.c > +++ b/drivers/video/backlight/pwm_bl.c > @@ -215,6 +215,10 @@ static int pwm_backlight_initial_power_state(const struct pwm_bl_data *pb) > if (!regulator_is_enabled(pb->power_supply)) > return FB_BLANK_POWERDOWN; > > + /* The pwm is disabled, keep it like this */ > + if (!pwm_is_enabled(pb->pwm)) > + return FB_BLANK_POWERDOWN; > + > return FB_BLANK_UNBLANK; > } I prefer "PWM" instead of "pwm" in prose (comments and commit message) because it's an abbreviation. Otherwise this looks correct: Reviewed-by: Thierry Reding <treding@xxxxxxxxxx>
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