Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965792AbdIZGyl (ORCPT ); Tue, 26 Sep 2017 02:54:41 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:33822 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935006AbdIZGyj (ORCPT ); Tue, 26 Sep 2017 02:54:39 -0400 Date: Tue, 26 Sep 2017 08:54:47 +0200 From: Greg Kroah-Hartman To: Dmitry Osipenko Cc: Thierry Reding , Jonathan Hunter , Rob Herring , linux-tegra@vger.kernel.org, devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Subject: Re: [PATCH v1 0/2] NVIDIA Tegra20 video decoder driver Message-ID: <20170926065447.GC6250@kroah.com> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.1 (2017-09-22) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 644 Lines: 15 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