From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pavel Machek Subject: Re: [PATCHv2] dt: bindings: Add support for CSI1 bus Date: Mon, 6 Feb 2017 10:49:57 +0100 Message-ID: <20170206094956.GA17974@amd> References: <20161228183036.GA13139@amd> <20170111225335.GA21553@amd> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="9jxsPFA5p3P2qPhR" Return-path: Content-Disposition: inline In-Reply-To: <20170111225335.GA21553@amd> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, ivo.g.dimitrov.75-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, sakari.ailus-X3B1VOXEql0@public.gmane.org, sre-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, pali.rohar-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, linux-media-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: devicetree@vger.kernel.org --9jxsPFA5p3P2qPhR Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable =46rom: Sakari Ailus In the vast majority of cases the bus type is known to the driver(s) since a receiver or transmitter can only support a single one. There are cases however where different options are possible. The existing V4L2 OF support tries to figure out the bus type and parse the bus parameters based on that. This does not scale too well as there are multiple serial busses that share common properties. Some hardware also supports multiple types of busses on the same interfaces. Document the CSI1/CCP2 property strobe. It signifies the clock or strobe mode. =20 Signed-off-by: Sakari Ailus Signed-off-by: Ivaylo Dimitrov Signed-off-by: Pavel Machek Reviewed-By: Sebastian Reichel diff --git a/Documentation/devicetree/bindings/media/video-interfaces.txt b= /Documentation/devicetree/bindings/media/video-interfaces.txt index 9cd2a36..6986fde 100644 --- a/Documentation/devicetree/bindings/media/video-interfaces.txt +++ b/Documentation/devicetree/bindings/media/video-interfaces.txt @@ -76,6 +76,12 @@ Optional endpoint properties mode horizontal and vertical synchronization signals are provided to the slave device (data source) by the master device (data sink). In the mast= er mode the data source device is also the source of the synchronization si= gnals. +- bus-type: data bus type. Possible values are: + 0 - autodetect based on other properties (MIPI CSI-2 D-PHY, parallel or = Bt656) + 1 - MIPI CSI-2 C-PHY + 2 - MIPI CSI1 + 3 - CCP2 + Autodetection is default, and bus-type property may be omitted in that c= ase. - bus-width: number of data lines actively used, valid for the parallel bu= sses. - data-shift: on the parallel data busses, if bus-width is used to specify= the number of data lines, data-shift can be used to specify which data lines= are @@ -112,7 +118,8 @@ Optional endpoint properties should be the combined length of data-lanes and clock-lanes properties. If the lane-polarities property is omitted, the value must be interpreted as 0 (normal). This property is valid for serial busses only. - +- strobe: Whether the clock signal is used as clock or strobe. Used + with CCP2, for instance. =20 Example ------- --=20 (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo= g.html --9jxsPFA5p3P2qPhR Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAliYRsQACgkQMOfwapXb+vJhwgCfbWUGyUdgwuV2PsWZUgRPCkqP 9jsAn2DTrcYhKR3fjy3MbpUl4xBXMnwj =VXYd -----END PGP SIGNATURE----- --9jxsPFA5p3P2qPhR-- -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html