From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756198Ab3KNU60 (ORCPT ); Thu, 14 Nov 2013 15:58:26 -0500 Received: from lxorguk.ukuu.org.uk ([81.2.110.251]:58007 "EHLO lxorguk.ukuu.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753965Ab3KNU6T (ORCPT ); Thu, 14 Nov 2013 15:58:19 -0500 Date: Thu, 14 Nov 2013 20:57:58 +0000 From: One Thousand Gnomes To: Andreas Werner Cc: linux-kernel@vger.kernel.org Subject: Re: Black screen with GMA500 driver on Atom E680 (invalid VBT signature) Message-ID: <20131114205758.78c0788d@alan.etchedpixels.co.uk> In-Reply-To: <20131114182523.GA2133@thinkpad.fritz.box> References: <20131113183418.GA1593@thinkpad.fritz.box> <20131114135209.0a8a15ff@alan.etchedpixels.co.uk> <20131114182523.GA2133@thinkpad.fritz.box> Organization: Intel Corporation X-Mailer: Claws Mail 3.8.1 (GTK+ 2.24.20; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > but if you checkout the PCI table in the driver, there is the device > and vendor ID mentioned, that means for me that the driver supports > the Graphic core in E680. > And after loading the driver, it will parse for $VBT. > I just find a comment in the PCI table with "E620" but > the device and vendor id is the same for E680. > > What do you mean with "Moorestown style" ? There are essentially two styles of configuration table used with PVR graphics. One is basically the same as that used on 'real' Intel graphics the other first introduced with one of the SoC devices is a firmware table in a completely different format. The netbook and PC oriented devices use the VBT, the tablet SoC devices and embedded ones seem to vary and have a VBT/GCT in different form that is found via config 0xFC on the chipset - see mid_bios.c Alan