From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8745BC3A59B for ; Mon, 2 Sep 2019 08:07:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 68D7021874 for ; Mon, 2 Sep 2019 08:07:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729707AbfIBIHA (ORCPT ); Mon, 2 Sep 2019 04:07:00 -0400 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:59199 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729626AbfIBIHA (ORCPT ); Mon, 2 Sep 2019 04:07:00 -0400 Received: by atrey.karlin.mff.cuni.cz (Postfix, from userid 512) id E3B45821B2; Mon, 2 Sep 2019 10:06:43 +0200 (CEST) Date: Mon, 2 Sep 2019 10:06:57 +0200 From: Pavel Machek To: Laurent Pinchart Cc: Hans Verkuil , Jacopo Mondi , Mauro Carvalho Chehab , Sakari Ailus , "open list:MEDIA INPUT INFRASTRUCTURE (V4L/DVB)" , open list Subject: Re: [RFC 2/5] media: v4l2-ctrl: Document V4L2_CID_LOCATION Message-ID: <20190902080657.GC15850@amd> References: <20190814202815.32491-1-jacopo@jmondi.org> <20190814202815.32491-3-jacopo@jmondi.org> <20190814224340.GD5015@pendragon.ideasonboard.com> <664fe7b3-9051-30da-736e-710a4e9cecde@xs4all.nl> <20190815143423.vaoswb4jvzd2blxp@uno.localdomain> <20190901172457.GC1047@bug> <20190902080002.GC4777@pendragon.ideasonboard.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="oTHb8nViIGeoXxdp" Content-Disposition: inline In-Reply-To: <20190902080002.GC4777@pendragon.ideasonboard.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org --oTHb8nViIGeoXxdp Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi! > > > Single integer. It's read-only, so it just reports the location. > > >=20 > > > It would be different if this was a writable control: then you need to > > > know which locations are possible to set, and that requires a menu ty= pe. > > >=20 > > > But it doesn't make sense to set the location from software. However,= the > > > location might change as a result of other changes: e.g. if the camera > > > has motor control of the tilt and the tilt changes from forward facin= g to > > > downward facing, then the driver might change the location from FRONT > > > to DOWN. A convoluted example perhaps, but this is just brainstorming. > >=20 > > There are phones with exactly such camera setup. And yes, it makes > > sense to be writable in that case, as software can move the camera in > > such case. >=20 > Out of curiosity, what phones are those ? This one: https://www.samsung.com/global/galaxy/galaxy-a80/ Best regards, Pavel --=20 (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo= g.html --oTHb8nViIGeoXxdp Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAl1szaEACgkQMOfwapXb+vJVUgCgrYVFlRl/MhpPjbBzw1NZDRjy HJEAoLBHobJ3rhRmeOiUZ291chTtbutb =q39d -----END PGP SIGNATURE----- --oTHb8nViIGeoXxdp--