From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752716Ab3JLQIW (ORCPT ); Sat, 12 Oct 2013 12:08:22 -0400 Received: from smtprelay0205.hostedemail.com ([216.40.44.205]:47266 "EHLO smtprelay.hostedemail.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752157Ab3JLQIV (ORCPT ); Sat, 12 Oct 2013 12:08:21 -0400 X-Session-Marker: 6A6F6540706572636865732E636F6D X-Spam-Summary: 30,2,0,,d41d8cd98f00b204,joe@perches.com,:::::::::::::,RULES_HIT:41:355:379:541:599:857:988:989:1042:1260:1261:1277:1311:1313:1314:1345:1359:1373:1437:1515:1516:1518:1534:1541:1593:1594:1711:1730:1747:1777:1792:2124:2194:2199:2393:2559:2562:2693:2828:3138:3139:3140:3141:3142:3353:3622:3865:3866:3867:3868:3871:3872:3873:3874:4043:4250:4321:5007:6119:7652:7903:9108:10004:10400:10848:11026:11232:11658:11914:12296:12517:12519:12740:13069:13311:13357:13618,0,RBL:none,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fn,MSBL:0,DNSBL:none,Custom_rules:0:0:0 X-HE-Tag: list93_e60e4ee8c209 X-Filterd-Recvd-Size: 2897 Message-ID: <1381594098.8864.9.camel@joe-AO722> Subject: Re: [PATCH 2/2] framebuffer: Remove pmag-aa-fb From: Joe Perches To: "Maciej W. Rozycki" Cc: Geert Uytterhoeven , Jean-Christophe Plagniol-Villard , Tomi Valkeinen , Linux Fbdev development list , "linux-kernel@vger.kernel.org" , Linux MIPS Mailing List Date: Sat, 12 Oct 2013 09:08:18 -0700 In-Reply-To: References: <6f500d88eb23fd9a4cfc5583f5ca17bc5f58fe24.1379641901.git.joe@perches.com> <1379702587.2301.12.camel@joe-AO722> Content-Type: text/plain; charset="ISO-8859-1" X-Mailer: Evolution 3.6.4-0ubuntu1 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, 2013-10-12 at 14:08 +0100, Maciej W. Rozycki wrote: [] > So I think I've got all the basic stuff covered now, including a change > similar to your proposal as well as a conversion to the driver model/new > TURBOchannel support infrastructure. But what I remembered is actually > right, the issue is wiring hardware cursor support into fbcon. The driver > uses its own display_switch structure with its own aafbcon_cursor handler > to use the twin onboard Bt431 chips for cursor generation (there's also > aafbcon_set_font that pokes at the Bt431s for cursor dimension changes). > I need to figure out what the best way will be to make the fbcon subsystem > support such an arrangement and that'll take me a little bit yet, so > please be patient. > > Note that the board is weird enough to have a 1-bit (true monochrome) > graphics plane, however the Bt455 used by the MX graphics adapter for > screen image generation is a 4-bit grey-scale video RAMDAC (only the LSB > inputs of its pixel port are wired to the graphics plane) and the twin > Bt431s use the overlay plane to produce a 2-bit grey-scale cursor. So we > do want to use the hardware cursor to be able to make it prominent among > the characters displayed throughout the screen and a software-generated > cursor cannot really substitute what hardware provides. I hope you're enjoying tinkering with old toys. Best of luck getting it going.