Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752920Ab0DNAOV (ORCPT ); Tue, 13 Apr 2010 20:14:21 -0400 Received: from mail-bw0-f219.google.com ([209.85.218.219]:35400 "EHLO mail-bw0-f219.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751545Ab0DNAOT convert rfc822-to-8bit (ORCPT ); Tue, 13 Apr 2010 20:14:19 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:from:date :x-google-sender-auth:message-id:subject:to:cc:content-type :content-transfer-encoding; b=BMJYAlP7MR+K427uC5zkNoKmXLVXNcFQbrZ8ulbDLlfNRsV/ynf1l2o3P0bt+iKFUE 4AU5g1g0sfD7wmijKDt4AjRkSRbw7Atpx79sGfq4K34xWJDHr4yHvU1HJqfga1h/q22i 7WtEic3ChOSwssoVVDyEdI3Z+fZCcupKOgCsY= MIME-Version: 1.0 In-Reply-To: <201004140119.53687.PeterHuewe@gmx.de> References: <201004140119.53687.PeterHuewe@gmx.de> From: Michal Suchanek Date: Wed, 14 Apr 2010 02:13:57 +0200 X-Google-Sender-Auth: ed2f1e7b832d56aa Message-ID: Subject: Re: Parallel port LCD driver undocumented To: =?UTF-8?Q?Peter_H=C3=BCwe?= Cc: devel@driverdev.osuosl.org, Greg Kroah-Hartman , devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org, Willy Tarreau , willy@meta-x.org Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2045 Lines: 53 On 14 April 2010 01:19, Peter Hüwe wrote: > Am Mittwoch 14 April 2010 01:13:40 schrieb Michal Suchanek: >> Hello >> >> I was thinking about adding a LCD to my PC so I thought that the >> panel.c driver which just went to 2.6.34 would be helpful. >> >> The problem is there is no documentation. I can get quite detailed >> documentation for at least some LCDs that are sold around here but >> there is not enough documentation for the driver to determine if the >> LCD in question would be compatible with the driver and with which >> protocol. >> >> Detailed explanation of the parameters would be appreciated. For >> example, there are three parallel protocols supported but there is no >> description of the difference between them. >> >> Thanks > > Hi, > I CC'ed willy - the original author of the driver - maybe he can help out. > > > Meanwhile - did you have a look at LCDproc? > http://lcdproc.org/ > Userspace "drivers" for a lot of lcds and keypads. Yes, after some thinking I figured that a software that I put in the initramfs could possibly drive the display even without much kernel support. With a working in-kernel driver I could get something displayed a bit earlier still. More importantly there is the question of displaying something useful on the display. With an in-kernel driver it should not be overly difficult to add support for echoing what goes to the console on the display as well. With a separate software I have no idea how to collect some reasonably useful information. I mean, if the machine is running correctly I can easily ssh in and run full suite of analytic tools and fill my monitor with various useless information about the system. It's the case when something does not seem to work when the display would come handy. Thanks Michal -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/