From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from nblzone-211-213.nblnetworks.fi ([83.145.211.213]:57530 "EHLO hillosipuli.retiisi.org.uk" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752556Ab2HHJfo (ORCPT ); Wed, 8 Aug 2012 05:35:44 -0400 Date: Wed, 8 Aug 2012 12:35:38 +0300 From: Sakari Ailus To: Hans Verkuil Cc: =?iso-8859-1?Q?R=E9mi?= Denis-Courmont , Laurent Pinchart , Tomasz Stanislawski , linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, airlied@redhat.com, m.szyprowski@samsung.com, kyungmin.park@samsung.com, sumit.semwal@ti.com, daeinki@gmail.com, daniel.vetter@ffwll.ch, robdclark@gmail.com, pawel@osciak.com, linaro-mm-sig@lists.linaro.org, subashrp@gmail.com, mchehab@redhat.com, g.liakhovetski@gmx.de Subject: Re: [PATCHv2 3/9] v4l: add buffer exporting via dmabuf Message-ID: <20120808093538.GF29636@valkosipuli.retiisi.org.uk> References: <1339684349-28882-1-git-send-email-t.stanislaws@samsung.com> <1390726.ZQ58TDe5fq@avalon> <201208012350.00207.remi@remlab.net> <201208020835.58332.hverkuil@xs4all.nl> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <201208020835.58332.hverkuil@xs4all.nl> Sender: linux-media-owner@vger.kernel.org List-ID: Hi Hans and Rémi, On Thu, Aug 02, 2012 at 08:35:58AM +0200, Hans Verkuil wrote: ... > Minimum or maximum? The maximum is 32, that's hardcoded in the V4L2 core. As far as I understand, V4L1 did have that limitation, as well as videobuf1 and 2 and a number of other drivers, but it's not found in the V4L2 core itself. While I'm not aware of a driver that'd allow creating more buffers than that the changes required to support more would be likely limited to videobuf2. Regards, -- Sakari Ailus e-mail: sakari.ailus@iki.fi jabber/XMPP/Gmail: sailus@retiisi.org.uk