From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jean Delvare Subject: Re: [PATCH 1/2] drm/kms: Make i2c buses faster Date: Fri, 21 Oct 2011 21:29:42 +0200 Message-ID: <201110212129.42810.jdelvare@suse.de> References: <201110210908.30632.jdelvare@suse.de> <201110211616.28511.jdelvare@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mx2.suse.de (cantor2.suse.de [195.135.220.15]) by gabe.freedesktop.org (Postfix) with ESMTP id A3F029E8A8 for ; Fri, 21 Oct 2011 12:29:44 -0700 (PDT) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dri-devel-bounces+sf-dri-devel=m.gmane.org@lists.freedesktop.org Errors-To: dri-devel-bounces+sf-dri-devel=m.gmane.org@lists.freedesktop.org To: Alex Deucher Cc: dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org Hi Alex, On Friday 21 October 2011 08:05:48 pm Alex Deucher wrote: > On Fri, Oct 21, 2011 at 10:16 AM, Jean Delvare > > Does anyone know at which speed hardware I2C engines are running > > the DDC bus on various graphics cards? > > IIRC, we generally target the radeon hw i2c engines to run at 50 khz. Then it doesn't seem unreasonable to try and achieve the same for bit- banged I2C. That's exactly what my patch is doing. -- Jean Delvare Suse L3