From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753366AbbKJOSd (ORCPT ); Tue, 10 Nov 2015 09:18:33 -0500 Received: from gloria.sntech.de ([95.129.55.99]:38645 "EHLO gloria.sntech.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752100AbbKJOSb (ORCPT ); Tue, 10 Nov 2015 09:18:31 -0500 From: Heiko Stuebner To: linux-arm-kernel@lists.infradead.org Cc: Philipp Zabel , Thierry Reding , linux-pwm@vger.kernel.org, YH Huang , Jingoo Han , linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, Christian Gmeiner , kernel@pengutronix.de, Lee Jones , Ajay Kumar Subject: Re: [PATCH v4] pwm-backlight: Avoid backlight flicker when probed from DT Date: Tue, 10 Nov 2015 15:18:10 +0100 Message-ID: <3447562.c3gSANEMio@phil> User-Agent: KMail/4.14.10 (Linux/4.2.0-1-amd64; KDE/4.14.13; x86_64; ; ) In-Reply-To: <1446483356-14338-1-git-send-email-p.zabel@pengutronix.de> References: <1446483356-14338-1-git-send-email-p.zabel@pengutronix.de> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.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