From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?UTF-8?B?VGVyamUgQmVyZ3N0csO2bQ==?= Subject: Re: [RFC v2 8/8] drm: tegra: Add gr2d device Date: Fri, 30 Nov 2012 09:44:36 +0200 Message-ID: <50B863E4.50700@nvidia.com> References: <50B60EFF.1050703@nvidia.com> <1354109602.1479.66.camel@tellur> <50B61845.6060102@nvidia.com> <1354111565.1479.73.camel@tellur> <50B6237B.8010808@nvidia.com> <1354115609.1479.91.camel@tellur> <50B63A70.8020107@nvidia.com> <1354128408.1479.137.camel@tellur> <50B71A28.5060807@nvidia.com> <1354180153.1479.162.camel@tellur> <20121129121430.GA3846@avionic-0098.adnet.avionic-design.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from hqemgate03.nvidia.com (hqemgate03.nvidia.com [216.228.121.140]) by gabe.freedesktop.org (Postfix) with ESMTP id 1B0D5E60A4 for ; Thu, 29 Nov 2012 23:41:06 -0800 (PST) In-Reply-To: <20121129121430.GA3846@avionic-0098.adnet.avionic-design.de> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dri-devel-bounces+sf-dri-devel=m.gmane.org@lists.freedesktop.org Errors-To: dri-devel-bounces+sf-dri-devel=m.gmane.org@lists.freedesktop.org To: Thierry Reding Cc: "linux-kernel@vger.kernel.org" , "dri-devel@lists.freedesktop.org" , "linux-tegra@vger.kernel.org" , Arto Merilainen List-Id: dri-devel@lists.freedesktop.org On 29.11.2012 14:14, Thierry Reding wrote: > On Thu, Nov 29, 2012 at 10:09:13AM +0100, Lucas Stach wrote: >> This way you would also be able to construct different handles (like GEM >> obj or V4L2 buffers) from the same backing nvhost object. Note that I'm >> not sure how useful this would be, but it seems like a reasonable design >> to me being able to do so. > > Wouldn't that be useful for sharing buffers between DRM and V4L2 using > dma-buf? I'm not very familiar with how exactly importing and exporting > work with dma-buf, so maybe I need to read up some more. I would still preserve the dma-buf support, for exactly this purpose. Terje