From mboxrd@z Thu Jan 1 00:00:00 1970 From: Russell King - ARM Linux Subject: Re: [RFC PATCH v4 3/8] staging: imx-drm: Document updated imx-drm device tree bindings Date: Thu, 27 Feb 2014 11:56:52 +0000 Message-ID: <20140227115652.GI21483@n2100.arm.linux.org.uk> References: <1393338203-25051-1-git-send-email-p.zabel@pengutronix.de> <1393338203-25051-4-git-send-email-p.zabel@pengutronix.de> <530F1C4C.2010504@ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <530F1C4C.2010504@ti.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dri-devel-bounces@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org To: Tomi Valkeinen Cc: devel@driverdev.osuosl.org, devicetree@vger.kernel.org, kernel@pengutronix.de, Greg Kroah-Hartman , dri-devel@lists.freedesktop.org, Grant Likely , linux-arm-kernel@lists.infradead.org List-Id: devicetree@vger.kernel.org On Thu, Feb 27, 2014 at 01:06:52PM +0200, Tomi Valkeinen wrote: > On 25/02/14 16:23, Philipp Zabel wrote: > > > +Freescale i.MX DRM master device > > +================================ > > + > > +The freescale i.MX DRM master device is a virtual device needed to list all > > +IPU or other display interface nodes that comprise the graphics subsystem. > > + > > +Required properties: > > +- compatible: Should be "fsl,imx-drm" > > +- ports: Should contain a list of phandles pointing to display interface ports > > + of IPU devices > > + > > +example: > > + > > +imx-drm { > > + compatible = "fsl,imx-drm"; > > + ports = <&ipu_di0>; > > +}; > > I'm not a fan of having non-hardware related things in the DT data. > Especially if it makes direct references to our SW, in this case DRM. > There's no DRM on the board. I wanted to avoid all that with OMAP > display bindings. > > Is there even need for such a master device? You can find all the > connected display devices from any single display device, by just > following the endpoint links. Please read up on what has been discussed over previous years: http://lists.freedesktop.org/archives/dri-devel/2013-July/041159.html and please, let's not endlessly rehash old discussions because someone wasn't involved and has a different opinion, otherwise we're never going to get anywhere. Thanks. -- FTTC broadband for 0.8mile line: now at 9.7Mbps down 460kbps up... slowly improving, and getting towards what was expected from it.