From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751929AbdCDJfN (ORCPT ); Sat, 4 Mar 2017 04:35:13 -0500 Received: from botnar.kaiser.cx ([176.28.20.183]:36020 "EHLO botnar.kaiser.cx" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750721AbdCDJfJ (ORCPT ); Sat, 4 Mar 2017 04:35:09 -0500 Date: Sat, 4 Mar 2017 09:52:35 +0100 From: Martin Kaiser To: Rob Herring , Bartlomiej Zolnierkiewicz Cc: linux-fbdev@vger.kernel.org, Philipp Zabel , Mark Rutland , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 2/2] dt-bindings: display: imx: entry for LAUSCR Message-ID: <20170304085235.GA25286@botnar.kaiser.cx> References: <1488193030-13064-1-git-send-email-martin@kaiser.cx> <1488193030-13064-2-git-send-email-martin@kaiser.cx> <20170302161330.6xguzjv3ttwbv5ek@rob-hp-laptop> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170302161330.6xguzjv3ttwbv5ek@rob-hp-laptop> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, Thus wrote Rob Herring (robh@kernel.org): > On Mon, Feb 27, 2017 at 11:56:42AM +0100, Martin Kaiser wrote: > > - fsl,pcr: LCDC PCR value > > + A display node may optionally define > > + - fsl,lauscr: LCDC AUS Mode Control Register value (only for imx21) > Looks like we already got one, but generally we don't just put magic > register values in the DT. What does this register control? it contains settings related to AUS mode. This mode sets different mappings between framebuffer memory and display pixels. It seems that these mappings were originally defined for displays from AUO. The only bit from this register that I really need is "AUS mode on/off". I could put this into the device tree instead of the entire register. Best regards, Martin