linux-kernel - Re: [PATCH v2 1/4] backlight: pwm_bl: fix cie1913 comments and constant

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Message-ID: <20191014072710.GE4545@dell>
Date:   Mon, 14 Oct 2019 08:27:10 +0100
From:   Lee Jones <lee.jones@...aro.org>
To:     Rasmus Villemoes <linux@...musvillemoes.dk>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Daniel Thompson <daniel.thompson@...aro.org>,
        Jingoo Han <jingoohan1@...il.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        linux-pwm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-fbdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/4] backlight: pwm_bl: fix cie1913 comments and
 constant

On Tue, 08 Oct 2019, Rasmus Villemoes wrote:

> The "break-even" point for the two formulas is L==8, which is also
> what the code actually implements. [Incidentally, at that point one
> has Y=0.008856, not 0.08856].
> 
> Moreover, all the sources I can find say the linear factor is 903.3
> rather than 902.3, which makes sense since then the formulas agree at
> L==8, both yielding the 0.008856 figure to four significant digits.
> 
> Reviewed-by: Daniel Thompson <daniel.thompson@...aro.org>
> Signed-off-by: Rasmus Villemoes <linux@...musvillemoes.dk>
> ---
>  drivers/video/backlight/pwm_bl.c | 12 +++++++++---
>  1 file changed, 9 insertions(+), 3 deletions(-)

Applied, thanks.

-- 
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
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