From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Tue, 22 Oct 2013 09:39:21 +0200
From: Thierry Reding <thierry.reding@gmail.com>
Subject: Re: [PATCH v2] pwm_backlight: avoid short blank screen while doing
 hibernation
Message-ID: <20131022073916.GC8681@ulmo.nvidia.com>
References: <1381285982-18670-1-git-send-email-Baohua.Song@csr.com>
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In-Reply-To: <1381285982-18670-1-git-send-email-Baohua.Song@csr.com>
List-ID: <linux-pwm.vger.kernel.org>
To: Barry Song <21cnbao@gmail.com>
Cc: linux-pwm@vger.kernel.org, workgroup.linux@csr.com, Huayi Li <huayi.li@csr.com>, Barry Song <Baohua.Song@csr.com>


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On Wed, Oct 09, 2013 at 10:33:02AM +0800, Barry Song wrote:
> From: Huayi Li <huayi.li@csr.com>
>=20
> Use SIMPLE_DEV_PM_OPS macro will initialize the member "freeze"
> and "thaw" of pwm_backlight_pm_ops as below,
> 	.freeze =3D suspend_fn,
> 	.thaw =3D resume_fn,
> then during the process of making hibernation snapshot, screen
> will be blank at the moment of freezing, and then light at the
> moment of thawing.
> this is not the right user experience for suspending to disk.
>=20
> so this patch drops freeze and thaw callback, make the LCD is
> always lighting before the final shutdown.
>=20
> Signed-off-by: Huayi Li <huayi.li@csr.com>
> Signed-off-by: Barry Song <Baohua.Song@csr.com>
> ---
>  -v2: move the #ifdef inside of the pwm_backlight_pwm_ops so that we
>  don't have to clutter the platform_driver here
>=20
>  drivers/video/backlight/pwm_bl.c | 10 ++++++++--
>  1 file changed, 8 insertions(+), 2 deletions(-)

Applied, thanks.

Thierry

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