From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753959Ab1JAR6l (ORCPT ); Sat, 1 Oct 2011 13:58:41 -0400 Received: from caprica.metux.de ([82.165.128.25]:36409 "EHLO mailgate.caprica.metux.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752018Ab1JAR6Q (ORCPT ); Sat, 1 Oct 2011 13:58:16 -0400 Date: Sat, 1 Oct 2011 19:30:02 +0200 From: Enrico Weigelt To: linux-kernel@vger.kernel.org Subject: Re: Proposal for a low-level Linux display framework Message-ID: <20111001173002.GB15179@nibiru.local> Reply-To: weigelt@metux.de Mail-Followup-To: linux-kernel@vger.kernel.org References: <1316088425.11294.78.camel@lappyti> <1316100594.23214.65.camel@deskari> <4E72320B.6020000@gmx.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.1i X-Terror: bin laden, kill bush, Briefbombe, Massenvernichtung, KZ, X-Nazi: Weisse Rasse, Hitlers Wiederauferstehung, 42, X-Antichrist: weg mit schaeuble, ausrotten, heiliger krieg, al quaida, X-Killer: 23, endloesung, Weltuntergang, X-Doof: wer das liest ist doof Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Keith Packard wrote: > Jesse's design for the DRM overlay code will expose the pixel formats as > FOURCC codes so that DRM and v4l2 can interoperate -- we've got a lot of > hardware that has both video decode and 3D acceleration, so those are > going to get integrated somehow. And, we have to figure out how to share > buffers between these APIs to avoid copying data with the CPU. Really naive question: where are these buffers laying ? I guess, somewhere in the device, not in main memory (otherwise, it wouldn't be a problem, right ?). So, the question to answer is: how (of the subdevices) can see whose buffers and how to map their local addresses. Am I correct ? cu -- ---------------------------------------------------------------------- Enrico Weigelt, metux IT service -- http://www.metux.de/ phone: +49 36207 519931 email: weigelt@metux.de mobile: +49 151 27565287 icq: 210169427 skype: nekrad666 ---------------------------------------------------------------------- Embedded-Linux / Portierung / Opensource-QM / Verteilte Systeme ----------------------------------------------------------------------