linux-kernel - Re: [RESEND PATCH v5 3/5] pwm-backlight: add support for PWM delays proprieties.

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Message-ID: <20180319165922.GD22770@ulmo>
Date:   Mon, 19 Mar 2018 17:59:22 +0100
From:   Thierry Reding <thierry.reding@...il.com>
To:     Enric Balletbo i Serra <enric.balletbo@...labora.com>
Cc:     Lee Jones <lee.jones@...aro.org>,
        Daniel Thompson <daniel.thompson@...aro.org>,
        Jingoo Han <jingoohan1@...il.com>,
        Rob Herring <robh+dt@...nel.org>, Pavel Machek <pavel@....cz>,
        Heiko Stuebner <heiko@...ech.de>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Richard Purdie <rpurdie@...ys.net>,
        Jacek Anaszewski <jacek.anaszewski@...il.com>,
        linux-pwm@...r.kernel.org, linux-fbdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, groeck@...omium.org,
        linux-rockchip@...ts.infradead.org, kernel@...labora.com
Subject: Re: [RESEND PATCH v5 3/5] pwm-backlight: add support for PWM delays
 proprieties.

On Fri, Feb 16, 2018 at 06:40:32PM +0100, Enric Balletbo i Serra wrote:
> Some panels (i.e. N116BGE-L41), in their power sequence specifications,
> request a delay between set the PWM signal and enable the backlight and
> between clear the PWM signal and disable the backlight. Add support for
> the new post-pwm-on-delay-ms and pwm-off-delay-ms proprieties to meet
> the timings.
> 
> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
> Acked-by: Pavel Machek <pavel@....cz>
> Acked-by: Daniel Thompson <daniel.thompson@...aro.org>
> Acked-by: Jingoo Han <jingoohan1@...il.com>
> ---
> Changes since v4:
>  - Rebased on top of mainline.
>  - Added the acks from Pavel Machek, Daniel thompson and Jingoo Han
> Changes since v3:
>  - Use two named members instead of pwm_delay[] (Daniel and Pavel)
>  - Use msleep instead of usleep_range. (Pavel)
> Changes since v2:
>  - Move the pwm/enable sequence to another patch (Thierry Reding)
> Changes since v1:
>  - As suggested by Daniel Thompson
>    - Do not assume power-on delay and power-off delay will be the same
>  - Move the check of dt property to the parse dt function.
> 
>  drivers/video/backlight/pwm_bl.c | 19 +++++++++++++++++++
>  include/linux/pwm_backlight.h    |  2 ++
>  2 files changed, 21 insertions(+)

Acked-by: Thierry Reding <thierry.reding@...il.com>

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