Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751909AbdCPJ0t (ORCPT ); Thu, 16 Mar 2017 05:26:49 -0400 Received: from metis.ext.4.pengutronix.de ([92.198.50.35]:38881 "EHLO metis.ext.4.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751247AbdCPJ0r (ORCPT ); Thu, 16 Mar 2017 05:26:47 -0400 Message-ID: <1489656360.2303.2.camel@pengutronix.de> Subject: Re: media / v4l2-mc: wishlist for complex cameras (was Re: [PATCH v4 14/36] [media] v4l2-mc: add a function to inherit controls from a pipeline) From: Philipp Zabel To: Nicolas Dufresne Cc: Philippe De Muyter , Mauro Carvalho Chehab , Pavel Machek , Hans Verkuil , Sakari Ailus , Russell King - ARM Linux , Steve Longerbeam , robh+dt@kernel.org, mark.rutland@arm.com, shawnguo@kernel.org, kernel@pengutronix.de, fabio.estevam@nxp.com, mchehab@kernel.org, nick@shmanahar.org, markus.heiser@darmarIT.de, laurent.pinchart+renesas@ideasonboard.com, bparrot@ti.com, geert@linux-m68k.org, arnd@arndb.de, sudipm.mukherjee@gmail.com, minghsiu.tsai@mediatek.com, tiffany.lin@mediatek.com, jean-christophe.trotin@st.com, horms+renesas@verge.net.au, niklas.soderlund+renesas@ragnatech.se, robert.jarzmik@free.fr, songjun.wu@microchip.com, andrew-ct.chen@mediatek.com, gregkh@linuxfoundation.org, shuah@kernel.org, sakari.ailus@linux.intel.com, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org, devel@driverdev.osuosl.org, Steve Longerbeam , Jacek Anaszewski Date: Thu, 16 Mar 2017 10:26:00 +0100 In-Reply-To: <1489604109.4593.4.camel@ndufresne.ca> References: <20170310125342.7f047acf@vento.lan> <20170310223714.GI3220@valkosipuli.retiisi.org.uk> <20170311082549.576531d0@vento.lan> <20170313124621.GA10701@valkosipuli.retiisi.org.uk> <20170314004533.3b3cd44b@vento.lan> <20170314072143.498cde9b@vento.lan> <20170314223254.GA7141@amd> <20170314215420.6fc63c67@vento.lan> <20170315105049.GA12099@frolo.macqel> <1489604109.4593.4.camel@ndufresne.ca> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.12.9-1+b1 Mime-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 2001:67c:670:100:3ad5:47ff:feaf:1a17 X-SA-Exim-Mail-From: p.zabel@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1323 Lines: 31 On Wed, 2017-03-15 at 14:55 -0400, Nicolas Dufresne wrote: > Le mercredi 15 mars 2017 à 11:50 +0100, Philippe De Muyter a écrit : > > > I would say: camorama, xawtv3, zbar, google talk, skype. If it runs > > > with those, it will likely run with any other application. > > > > > > > I would like to add the 'v4l2src' plugin of gstreamer, and on the > > imx6 its > > While it would be nice if somehow you would get v4l2src to work (in > some legacy/emulation mode through libv4l2), v4l2src works just fine, provided the pipeline is configured manually in advance via media-ctl. > the longer plan is to > implement smart bin that handle several v4l2src, that can do the > required interactions so we can expose similar level of controls as > found in Android Camera HAL3, and maybe even further assuming userspace > can change the media tree at run-time. We might be a long way from > there, specially that some of the features depends on how much the > hardware can do. Just being able to figure-out how to build the MC tree > dynamically seems really hard when thinking of generic mechanism. Also, > Request API will be needed. > > I think for this one, we'll need some userspace driver that enable the > features (not hide them), and that's what I'd be looking for from > libv4l2 in this regard. regards Philipp