From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753478AbdBJTyl (ORCPT ); Fri, 10 Feb 2017 14:54:41 -0500 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:41464 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751519AbdBJTyj (ORCPT ); Fri, 10 Feb 2017 14:54:39 -0500 Date: Fri, 10 Feb 2017 20:54:35 +0100 From: Pavel Machek To: Rob Herring Cc: Sakari Ailus , "devicetree@vger.kernel.org" , Ivaylo Dimitrov , Sebastian Reichel , Pali =?iso-8859-1?Q?Roh=E1r?= , "linux-media@vger.kernel.org" , Kumar Gala , Mauro Carvalho Chehab , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH] devicetree: Add video bus switch Message-ID: <20170210195435.GA1615@amd> References: <20161119232943.GF13965@valkosipuli.retiisi.org.uk> <20161214122451.GB27011@amd> <20161222100104.GA30917@amd> <20161222133938.GA30259@amd> <20161224152031.GA8420@amd> <20170203123508.GA10286@amd> <20170208213609.lnemfbzitee5iur2@rob-hp-laptop> <20170208223017.GA18807@amd> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="Q68bSM7Ycu6FN28Q" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --Q68bSM7Ycu6FN28Q Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable > >>> > diff --git a/Documentation/devicetree/bindings/media/video-bus-swit= ch.txt b/Documentation/devicetree/bindings/media/video-bus-switch.txt > >>> > new file mode 100644 > >>> > index 0000000..1b9f8e0 > >>> > --- /dev/null > >>> > +++ b/Documentation/devicetree/bindings/media/video-bus-switch.txt > >>> > @@ -0,0 +1,63 @@ > >>> > +Video Bus Switch Binding > >>> > +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D > >>> > >>> I'd call it a mux rather than switch. > >> > >> It is a switch, not a multiplexor ( > >> https://en.wikipedia.org/wiki/Multiplexing ). Only one camera can > >> operate at a time. > > > > It's no different than an i2c mux. It's one at a time. Take a look at the wikipedia. If you do "one at a time" at 100Hz, you can claim it is time-domain multiplex. But we are plain switching the cameras. It takes second (or so) to setup the pipeline. This is not multiplex. Pavel --=20 (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo= g.html --Q68bSM7Ycu6FN28Q Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAlieGnsACgkQMOfwapXb+vJ//wCgu++YDF6dtxzCb9BqgCeTHma2 WtQAoLwB9F7vIQDN05S5lLTzadyWPBV7 =rdtk -----END PGP SIGNATURE----- --Q68bSM7Ycu6FN28Q--