From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751978AbcF0Ht2 (ORCPT ); Mon, 27 Jun 2016 03:49:28 -0400 Received: from mail-pa0-f53.google.com ([209.85.220.53]:34275 "EHLO mail-pa0-f53.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751831AbcF0HtQ (ORCPT ); Mon, 27 Jun 2016 03:49:16 -0400 From: Nicolas Boichat To: dri-devel@lists.freedesktop.org Cc: Archit Taneja , Thierry Reding , Nicolas Boichat , Russell King , linux-kernel@vger.kernel.org, p.zabel@pengutronix.de, marcheu@chromium.org Subject: [RFC PATCH 4/4] CHROMIUM: devicetree: Add GPIO display mux binding Date: Mon, 27 Jun 2016 15:48:47 +0800 Message-Id: <1467013727-11482-5-git-send-email-drinkcat@chromium.org> X-Mailer: git-send-email 2.8.0.rc3.226.g39d4020 In-Reply-To: <1467013727-11482-1-git-send-email-drinkcat@chromium.org> References: <1467013727-11482-1-git-send-email-drinkcat@chromium.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Signed-off-by: Nicolas Boichat --- .../devicetree/bindings/drm/bridge/gpio-mux.txt | 59 ++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 Documentation/devicetree/bindings/drm/bridge/gpio-mux.txt diff --git a/Documentation/devicetree/bindings/drm/bridge/gpio-mux.txt b/Documentation/devicetree/bindings/drm/bridge/gpio-mux.txt new file mode 100644 index 0000000..cce410c --- /dev/null +++ b/Documentation/devicetree/bindings/drm/bridge/gpio-mux.txt @@ -0,0 +1,59 @@ +Generic display mux (1 input, 2 outputs) +---------------------------------------- + +This bindings describes a simple display (e.g. HDMI) mux, that has 2 +inputs, and 1 output. The mux status is controlled by hardware, and +its status is read back using a GPIO. + +Required properties: + + - compatible : "gpio-display-mux" + - detect-gpios : GPIO that indicates the active output + + - Video port for input, using the DT bindings defined in [1]. + - 2 video port for output, using the DT bindings defined in [1]. + The reg value in the endpoints matches the GPIO status: when + GPIO is active, endpoint with reg value <1> is selected,. + +[1]: Documentation/devicetree/bindings/media/video-interfaces.txt + +Example: + + hdmi_mux: hdmi_mux { + compatible = "gpio-display-mux"; + status = "okay"; + detect-gpios = <&pio 36 GPIO_ACTIVE_HIGH>; + pinctrl-names = "default"; + pinctrl-0 = <&hdmi_mux_pins>; + ddc-i2c-bus = <&hdmiddc0>; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { /* input */ + reg = <0>; + + hdmi_mux_in: endpoint { + remote-endpoint = <&hdmi0_out>; + }; + }; + + port@1 { /* output */ + reg = <1>; + + #address-cells = <1>; + #size-cells = <0>; + + hdmi_mux_out_anx: endpoint@0 { + reg = <0>; + remote-endpoint = <&anx7688_in>; + }; + + hdmi_mux_out_hdmi: endpoint@1 { + reg = <1>; + remote-endpoint = <&hdmi_connector_in>; + }; + }; + }; + }; -- 2.8.0.rc3.226.g39d4020