From mboxrd@z Thu Jan 1 00:00:00 1970 From: Heiko Stuebner Date: Tue, 10 Nov 2015 14:18:10 +0000 Subject: Re: [PATCH v4] pwm-backlight: Avoid backlight flicker when probed from DT Message-Id: <3447562.c3gSANEMio@phil> List-Id: References: <1446483356-14338-1-git-send-email-p.zabel@pengutronix.de> In-Reply-To: <1446483356-14338-1-git-send-email-p.zabel@pengutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-arm-kernel@lists.infradead.org Hi Philipp, Am Montag, 2. November 2015, 17:55:56 schrieb Philipp Zabel: > If the driver is probed from the device tree, and there is a phandle > property set on it, and the enable GPIO is already configured as output, > and the backlight is currently disabled, keep it disabled. > If all these conditions are met, assume there will be some other driver > that can enable the backlight at the appropriate time. > > Signed-off-by: Philipp Zabel > Reviewed-by: Christian Gmeiner this patch improves the white screen when booting a veyron chromebook a lot. I still see a small white flash, but that can probably come from the WIP edp driver. Tested-by: Heiko Stuebner