From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from perceval.ideasonboard.com ([95.142.166.194]:47049 "EHLO perceval.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750892Ab2DQBD0 (ORCPT ); Mon, 16 Apr 2012 21:03:26 -0400 From: Laurent Pinchart To: Tomasz Stanislawski Cc: 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, hverkuil@xs4all.nl, remi@remlab.net, subashrp@gmail.com, mchehab@redhat.com Subject: Re: [PATCH v4 12/14] v4l: vb2-dma-contig: change map/unmap behaviour for importers Date: Tue, 17 Apr 2012 03:03:37 +0200 Message-ID: <1587515.L9hht06z7c@avalon> In-Reply-To: <1334332076-28489-13-git-send-email-t.stanislaws@samsung.com> References: <1334332076-28489-1-git-send-email-t.stanislaws@samsung.com> <1334332076-28489-13-git-send-email-t.stanislaws@samsung.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Sender: linux-media-owner@vger.kernel.org List-ID: Hi Tomasz, Thanks for the patch. On Friday 13 April 2012 17:47:54 Tomasz Stanislawski wrote: > The DMABUF documentation says that the map_dma_buf callback should return > scatterlist that is mapped into a caller's address space. In practice, > almost none of existing implementations of DMABUF exporter does it. This > patch breaks the DMABUF specification in order to allow exchange DMABUF > buffers between other APIs like DRM. Once again, this means that it's time to either fix the documentation or fix the non-compliant drivers. Could you please read the mail I've sent on 27/03/2012 in the "Minutes from V4L2 update call" thread and reply there to avoid scattering the discussion ? -- Regards, Laurent Pinchart