From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753224AbbIJPiB (ORCPT ); Thu, 10 Sep 2015 11:38:01 -0400 Received: from galahad.ideasonboard.com ([185.26.127.97]:49599 "EHLO galahad.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751392AbbIJPh6 (ORCPT ); Thu, 10 Sep 2015 11:37:58 -0400 From: Laurent Pinchart To: dri-devel@lists.freedesktop.org Cc: Enric Balletbo Serra , Rob Herring , devel@driverdev.osuosl.org, "devicetree@vger.kernel.org" , Pawel Moll , Ian Campbell , Greg Kroah-Hartman , linux-kernel@vger.kernel.org, Sjoerd Simons , Rob Herring , span@analogixsemi.com, Kumar Gala , Mark Rutland , Javier Martinez Canillas , Nathan Chung Subject: Re: [PATCHv2 2/3] devicetree: Add new ANX7814 SlimPort transmitter binding. Date: Thu, 10 Sep 2015 18:37:57 +0300 Message-ID: <2441988.GBbudkNyP4@avalon> User-Agent: KMail/4.14.8 (Linux/4.0.5-gentoo; KDE/4.14.8; x86_64; ; ) In-Reply-To: References: <1441697120-3876-1-git-send-email-enric.balletbo@collabora.com> <55EF8009.6070009@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Enric, On Thursday 10 September 2015 16:11:03 Enric Balletbo Serra wrote: > 2015-09-09 2:40 GMT+02:00 Rob Herring : > > On 09/08/2015 02:25 AM, Enric Balletbo i Serra wrote: > >> The ANX7814 is an ultra-low power Full-HD (1080p60) SlimPort transmitter > >> designed for portable devices. > >> > >> You can add support to your board with current binding. > >> > >> Example: > >> anx7814: anx7814@38 { > >> compatible = "analogix,anx7814"; > >> reg = <0x38>; > >> pd-gpios = <&gpio0 1 GPIO_ACTIVE_HIGH>; > >> reset-gpios = <&gpio0 2 GPIO_ACTIVE_HIGH>; > >> }; > >> > >> Signed-off-by: Enric Balletbo i Serra > >> --- > >> > >> .../devicetree/bindings/video/anx7814.txt | 22 ++++++++++++++++ > >> 1 file changed, 22 insertions(+) > >> create mode 100644 Documentation/devicetree/bindings/video/anx7814.txt > >> > >> diff --git a/Documentation/devicetree/bindings/video/anx7814.txt > >> b/Documentation/devicetree/bindings/video/anx7814.txt new file mode > >> 100644 > >> index 0000000..a8cc746 > >> --- /dev/null > >> +++ b/Documentation/devicetree/bindings/video/anx7814.txt > >> @@ -0,0 +1,22 @@ > >> +Analogix ANX7814 SlimPort (Full-HD Transmitter) > >> +----------------------------------------------- > >> + > >> +The ANX7814 is an ultra-low power Full-HD (1080p60) SlimPort transmitter > >> +designed for portable devices. > >> + > >> +Required properties: > >> + > >> + - compatible : "analogix,anx7814" > >> + - reg : I2C address of the device > >> + - pd-gpios : Which GPIO to use for power down > >> + - reset-gpios : Which GPIO to use for reset > >> + > >> +Example: > >> + > >> + anx7814: anx7814@38 { > >> + compatible = "analogix,anx7814"; > >> + reg = <0x38>; > >> + pd-gpios = <&gpio0 1 GPIO_ACTIVE_HIGH>; > >> + reset-gpios = <&gpio0 2 GPIO_ACTIVE_HIGH>; > > > > No ports needed for describing data connections? > > IMHO I'm not sure if this is applicable here, in this case the bridge > is transparent so it's not required another device node. For example, > I've an evaluation board, whre I connect in one side an HDMI input > signal an in the other side a DP monitor, the driver only configures > the chip and waits for different events (cable plug, cable unplug, etc > ..) But what if the chip is connected to a display controller, for instance to the HDMI output of an SoC ? Is that a use case for the hardware ? -- Regards, Laurent Pinchart