[U-Boot] [PATCH] video: backlight: fix pwm invertation

[Nicolas Chauvet]

This patch fixes the panel on my device (paz00).
Can it be applied to 2019-07 ?

Thx in advance


Le jeu. 27 juin 2019 à 21:52, Marc Dietrich <marvin24 at gmx.de> a écrit :
>
> Am Freitag, 21. Juni 2019, 22:01:35 CEST schrieb Marc Dietrich:
> > Fixes: 57e7775413 ("video: backlight: Parse PWM polarity cell")
> >
> > set_pwm will always fail if pwm_set_invert is not implemented, leaving the
> > backlight dark. Fix this by calling pwm_set_invert only if pwm is inverted.
> >
> > Signed-off-by: Marc Dietrich <marvin24 at gmx.de>
>
> ping?
>
> > ---
> >  drivers/video/pwm_backlight.c | 7 ++++---
> >  1 file changed, 4 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/video/pwm_backlight.c b/drivers/video/pwm_backlight.c
> > index a587977c22..26bcbeb42b 100644
> > --- a/drivers/video/pwm_backlight.c
> > +++ b/drivers/video/pwm_backlight.c
> > @@ -61,12 +61,13 @@ static int set_pwm(struct pwm_backlight_priv *priv)
> >
> >       duty_cycle = priv->period_ns * (priv->cur_level - priv->min_level) /
> >               (priv->max_level - priv->min_level + 1);
> > +
> >       ret = pwm_set_config(priv->pwm, priv->channel, priv->period_ns,
> >                            duty_cycle);
> > -     if (ret)
> > -             return log_ret(ret);
> >
> > -     ret = pwm_set_invert(priv->pwm, priv->channel, priv->polarity);
> > +     if (!ret && priv->polarity)
> > +             ret = pwm_set_invert(priv->pwm, priv->channel, priv->polarity);
> > +
> >       return log_ret(ret);
> >  }
> >
> > --
> > 2.17.1
>
>
>
>
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Nicolas (kwizart)