From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail.free-electrons.com ([88.190.12.23]:41838 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751083Ab1IBLwH convert rfc822-to-8bit (ORCPT ); Fri, 2 Sep 2011 07:52:07 -0400 Date: Fri, 2 Sep 2011 13:51:58 +0200 From: Thomas Petazzoni To: Laurent Pinchart Cc: "Wu, Josh" , linux-media@vger.kernel.org Subject: Re: Using atmel-isi for direct output on framebuffer ? Message-ID: <20110902135158.41e9c84d@skate> In-Reply-To: <201109021342.03721.laurent.pinchart@ideasonboard.com> References: <20110901170555.568af6ea@skate> <4C79549CB6F772498162A641D92D532802A09156@penmb01.corp.atmel.com> <20110902111853.292d7f26@skate> <201109021342.03721.laurent.pinchart@ideasonboard.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Sender: linux-media-owner@vger.kernel.org List-ID: Hi Laurent, Le Fri, 2 Sep 2011 13:42:03 +0200, Laurent Pinchart a écrit : > I'm not sure if V4L2_CAP_VIDEO_OVERLAY is a good solution for this. > This driver type (or rather buffer type) was used on old systems to > capture directly to the PCI graphics card memory. Nowadays I would > advice using USERPTR with framebuffer memory. Could you give a short summary of how the USERPTR mechanism works? Thanks, Thomas -- Thomas Petazzoni, Free Electrons Kernel, drivers, real-time and embedded Linux development, consulting, training and support. http://free-electrons.com