From mboxrd@z Thu Jan 1 00:00:00 1970 From: Greg Kroah-Hartman Subject: Re: [PATCH v1 0/2] NVIDIA Tegra20 video decoder driver Date: Tue, 26 Sep 2017 08:54:47 +0200 Message-ID: <20170926065447.GC6250@kroah.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: Sender: linux-tegra-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Dmitry Osipenko Cc: Thierry Reding , Jonathan Hunter , Rob Herring , linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, devel-gWbeCf7V1WCQmaza687I9mD2FQJk+8+b@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: devicetree@vger.kernel.org On Tue, Sep 26, 2017 at 01:15:41AM +0300, Dmitry Osipenko wrote: > This driver provides accelerated video decoding to NVIDIA Tegra20 SoC's, > it is a result of reverse-engineering efforts. Driver has been tested on > Toshiba AC100 and Acer A500, it should work on any Tegra20 device. > > In userspace this driver is utilized by libvdpau-tegra [0] that implements > VDPAU interface, so any video player that supports VDPAU can provide > accelerated video decoding on Tegra20 on Linux. Why not use the v4l2 api instead? Doesn't that provide the same needed user/kernel api here instead of creating yet-another-custom ioctl? thanks, greg k-h