linux-kernel - Re: [PATCH 1/2] backlight: gpio_backlight: add new property default-brightness-level

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Message-ID: <CAH3L5Qo51dVV_FsYTLKNcmYL5VbD+9S54VYuNbhZUunHOTi_aA@mail.gmail.com>
Date:   Mon, 29 May 2023 10:02:21 +0300
From:   Alexandru Ardelean <alex@...uggie.ro>
To:     Philippe CORNU <philippe.cornu@...s.st.com>
Cc:     dri-devel@...ts.freedesktop.org, linux-leds@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-fbdev@...r.kernel.org, lee@...nel.org,
        daniel.thompson@...aro.org, jingoohan1@...il.com, pavel@....cz,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        conor+dt@...nel.org, deller@....de,
        Yannick Fertre <yannick.fertre@...s.st.com>
Subject: Re: [PATCH 1/2] backlight: gpio_backlight: add new property default-brightness-level

On Fri, May 26, 2023 at 3:04 PM Philippe CORNU
<philippe.cornu@...s.st.com> wrote:
>
>
> On 5/19/23 22:05, Alexandru Ardelean wrote:
> > From: Yannick Fertre <yannick.fertre@...s.st.com>
> >
> > Add new property to set a brightness by default at probe.
> >
> > Reviewed-by: Philippe CORNU <philippe.cornu@...s.st.com>
>
> Hi Alexandru,
>
> Many thanks for your patch.
>
> You have sent a patch originally pushed on the STMicroelectronics github
> as mentioned in your commit message (no problem with that :-). But, the
> "Reviewed-by" inside this github patch is linked to our gerrit STM
> internal server so you can not use it directly for mainlining this patch.
>
> So please, re-send your this patch without my "Reviewed-by".

ack
will do

>
> Many thanks
> Philippe :-)
>
>
> > Signed-off-by: Yannick Fertre <yannick.fertre@...s.st.com>
> > Signed-off-by: Alexandru Ardelean <alex@...uggie.ro>
> > ---
> >
> > Link to original patch:
> >    https://github.com/STMicroelectronics/linux/commit/c4067d7bd883c6fa14ffd49892c4ce663cdafe98
> >
> >   drivers/video/backlight/gpio_backlight.c | 7 ++++++-
> >   1 file changed, 6 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/video/backlight/gpio_backlight.c b/drivers/video/backlight/gpio_backlight.c
> > index 6f78d928f054..d3fa3a8bef4d 100644
> > --- a/drivers/video/backlight/gpio_backlight.c
> > +++ b/drivers/video/backlight/gpio_backlight.c
> > @@ -53,6 +53,7 @@ static int gpio_backlight_probe(struct platform_device *pdev)
> >       struct backlight_device *bl;
> >       struct gpio_backlight *gbl;
> >       int ret, init_brightness, def_value;
> > +     u32 value;
> >
> >       gbl = devm_kzalloc(dev, sizeof(*gbl), GFP_KERNEL);
> >       if (gbl == NULL)
> > @@ -93,7 +94,11 @@ static int gpio_backlight_probe(struct platform_device *pdev)
> >       else
> >               bl->props.power = FB_BLANK_UNBLANK;
> >
> > -     bl->props.brightness = 1;
> > +     ret = device_property_read_u32(dev, "default-brightness-level", &value);
> > +     if (!ret && value <= props.max_brightness)
> > +             bl->props.brightness = value;
> > +     else
> > +             bl->props.brightness = 1;
> >
> >       init_brightness = backlight_get_brightness(bl);
> >       ret = gpiod_direction_output(gbl->gpiod, init_brightness);