From mboxrd@z Thu Jan 1 00:00:00 1970 From: Benjamin Herrenschmidt Subject: Re: [ANNOUNCE]: VM86 Daemon Date: 01 Apr 2003 10:29:34 +0200 Sender: linux-fbdev-devel-admin@lists.sourceforge.net Message-ID: <1049185774.593.46.camel@zion.wanadoo.fr> References: <1049104351.1037.53.camel@localhost.localdomain> <3E886C5F.28140.1013B3CA@localhost> <1049160350.1059.39.camel@localhost.localdomain> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: Received: from griffon.mipsys.com ([217.167.51.129] helo=zion.wanadoo.fr) by sc8-sf-list1.sourceforge.net with esmtp (Exim 3.31-VA-mm2 #1 (Debian)) id 190H8e-0002Fd-00 for ; Tue, 01 Apr 2003 00:29:00 -0800 In-Reply-To: <1049160350.1059.39.camel@localhost.localdomain> Errors-To: linux-fbdev-devel-admin@lists.sourceforge.net List-Help: List-Post: List-Subscribe: , List-Id: List-Unsubscribe: , List-Archive: Content-Type: text/plain; charset="us-ascii" To: Antonino Daplas Cc: Kendall Bennett , Linux Fbdev development list This is interesting, but brings back a point I had in mind for some time (regardless of having that daemon or not), which is to provide a consistent API for fbdev's to provide EDID informations to a "monitor" layer (or to userland) and for fbdev's to setup appropriately based on EDID informations. There are several issues here. One is the actual retreival of the EDID data. There are several ways to do it, and all of them must be implemented in an ideal world: - BIOS stuff (via something like your daemon) - Direct i2c (for all platforms that don't have a BIOS or cannot run it) - Other arch specific way (this includes what we do on some PPCs which is to retreive the EDID block from the device tree provided by the firmware). Once the fbdev can provide, upon request, the EDID and probing info (some cards can tell you if something is connected even without providing an EDID, like on the S-Video output, or on the VGA output with a non-DDC capable monitor), we need some consistent API to retreive that from, userland at least Then, we need fbdev to "validate" modes based on those EDID infos (via fbmon ?). ------------------------------------------------------- This SF.net email is sponsored by: ValueWeb: Dedicated Hosting for just $79/mo with 500 GB of bandwidth! No other company gives more support or power for your dedicated server http://click.atdmt.com/AFF/go/sdnxxaff00300020aff/direct/01/