linux-kernel - Re: [PATCH v4 13/13] video: backlight: mt6370: Add Mediatek MT6370 support

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Date:   Wed, 13 Jul 2022 14:07:15 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     ChiaEn Wu <peterwu.pub@...il.com>
Cc:     Lee Jones <lee.jones@...aro.org>,
        Daniel Thompson <daniel.thompson@...aro.org>,
        Jingoo Han <jingoohan1@...il.com>, Pavel Machek <pavel@....cz>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Sebastian Reichel <sre@...nel.org>,
        Chunfeng Yun <chunfeng.yun@...iatek.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Guenter Roeck <linux@...ck-us.net>,
        "Krogerus, Heikki" <heikki.krogerus@...ux.intel.com>,
        Helge Deller <deller@....de>,
        ChiaEn Wu <chiaen_wu@...htek.com>,
        Alice Chen <alice_chen@...htek.com>,
        cy_huang <cy_huang@...htek.com>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Linux LED Subsystem <linux-leds@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>,
        linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        USB <linux-usb@...r.kernel.org>,
        linux-iio <linux-iio@...r.kernel.org>,
        "open list:FRAMEBUFFER LAYER" <linux-fbdev@...r.kernel.org>,
        szuni chen <szunichen@...il.com>
Subject: Re: [PATCH v4 13/13] video: backlight: mt6370: Add Mediatek MT6370 support

On Wed, Jul 13, 2022 at 12:53 PM ChiaEn Wu <peterwu.pub@...il.com> wrote:
> Andy Shevchenko <andy.shevchenko@...il.com> 於 2022年7月5日 週二 清晨5:14寫道：
> > On Mon, Jul 4, 2022 at 7:43 AM ChiaEn Wu <peterwu.pub@...il.com> wrote:

Please, remove unneeded context when replying!

...

> > > +               brightness_val[0] = (brightness - 1) & MT6370_BL_DIM2_MASK;
> > > +               brightness_val[1] = (brightness - 1)
> > > +                                   >> fls(MT6370_BL_DIM2_MASK);
> >
> > Bad indentation. One line?
>
> Well... if indent to one line, it will be over 80 characters(or called columns?)
> From my understanding, it is not allowed, right??

It's allowed to some extent.Use your common sense.
Here it's obviously broken indentation.

...

> > > +               prop_val = (ilog2(roundup_pow_of_two(prop_val)) + 1) >> 1;
> >
> > Isn't something closer to get_order() or fls()?
>
> I will revise it to "(get_order(prop_va * PAGE_SIZE) + 1) / 2" and
> this change is meet your expectations??

Nope. Try again. What about fls()?

...

> > > +       props->max_brightness = min_t(u32, brightness,
> > > +                                     MT6370_BL_MAX_BRIGHTNESS);
> >
> > One line?
>
>  Ditto, it will be over 80 characters...

As per above.

-- 
With Best Regards,
Andy Shevchenko