From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932140AbdCBJCs (ORCPT ); Thu, 2 Mar 2017 04:02:48 -0500 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:35899 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932113AbdCBJCo (ORCPT ); Thu, 2 Mar 2017 04:02:44 -0500 Date: Thu, 2 Mar 2017 09:54:56 +0100 From: Pavel Machek To: Sakari Ailus Cc: Rob Herring , "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" , Steve Longerbeam , p.zabel@pengutronix.de Subject: Re: [PATCH] devicetree: Add video bus switch Message-ID: <20170302085456.GA27818@amd> References: <20161224152031.GA8420@amd> <20170203123508.GA10286@amd> <20170208213609.lnemfbzitee5iur2@rob-hp-laptop> <20170208223017.GA18807@amd> <20170210195435.GA1615@amd> <20170210221742.GI13854@valkosipuli.retiisi.org.uk> <20170213095420.GA7065@amd> <20170213102034.GI16975@valkosipuli.retiisi.org.uk> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="jRHKVT23PllUwdXP" Content-Disposition: inline In-Reply-To: <20170213102034.GI16975@valkosipuli.retiisi.org.uk> 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 --jRHKVT23PllUwdXP Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon 2017-02-13 12:20:35, Sakari Ailus wrote: > Hi Pavel, >=20 > On Mon, Feb 13, 2017 at 10:54:20AM +0100, Pavel Machek wrote: > > Hi! > >=20 > > > > Take a look at the wikipedia. If you do "one at a time" at 100Hz, y= ou > > > > can claim it is time-domain multiplex. But we are plain switching t= he > > > > cameras. It takes second (or so) to setup the pipeline. > > > >=20 > > > > This is not multiplex. > > >=20 > > > The functionality is still the same, isn't it? Does it change what it= is if > > > the frequency might be 100 Hz or 0,01 Hz? > >=20 > > Well. In your living your you can have a switch, which is switch at > > much less than 0.01Hz. You can also have a dimmer, which is a PWM, > > which is switch at 100Hz or so. So yes, I'd say switch and mux are > > different things. >=20 > Light switches are mostly on/off switches. It'd be interesting to have a > light switch that you could use to light either of the light bulbs in a r= oom > but not to switch both of them on at the same time. Or off... :-) >=20 > I wonder if everyone would be happy with a statement saying that it's a > on / on switch which is used to implement a multiplexer? I believe the difference is the timescale. If it switches "slow" it is a switch. If it switches fast, it is a dimmer, mux, or something.... Anyway, someone else was faster, so they get to name their creation... Pavel --=20 (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo= g.html --jRHKVT23PllUwdXP Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAli33eAACgkQMOfwapXb+vIFUgCeP5MP4Ffn+ZAGpA/pIXtj4z1M H1QAoJoj6bKMmhWIPr+W5dIKWuqifQSq =mtaR -----END PGP SIGNATURE----- --jRHKVT23PllUwdXP--