linux-kernel - [PATCH 2/3] dt-bindings: drm/bridge: ti-sn65dsi86: Add hpd-gpios to the bindings

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Date:   Wed, 15 Apr 2020 08:48:40 -0700
From:   Douglas Anderson <dianders@...omium.org>
To:     airlied@...ux.ie, daniel@...ll.ch, robh+dt@...nel.org,
        narmstrong@...libre.com, a.hajda@...sung.com,
        Laurent.pinchart@...asonboard.com, spanda@...eaurora.org
Cc:     jonas@...boo.se, bjorn.andersson@...aro.org,
        devicetree@...r.kernel.org, jeffrey.l.hugo@...il.com,
        swboyd@...omium.org, jernej.skrabec@...l.net,
        linux-arm-msm@...r.kernel.org, robdclark@...omium.org,
        dri-devel@...ts.freedesktop.org,
        Douglas Anderson <dianders@...omium.org>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] dt-bindings: drm/bridge: ti-sn65dsi86: Add hpd-gpios to the bindings

Allow people to specify to use a GPIO for hot-plug-detect.  Add an
example.

NOTE: The current patch adding support for hpd-gpios to the Linux
driver for hpd-gpios only adds enough support to the driver so that
the bridge can use one of its own GPIOs.  The bindings, however, are
written generically.

Signed-off-by: Douglas Anderson <dianders@...omium.org>
---

 .../bindings/display/bridge/ti,sn65dsi86.yaml          | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/display/bridge/ti,sn65dsi86.yaml b/Documentation/devicetree/bindings/display/bridge/ti,sn65dsi86.yaml
index 8cacc6db33a9..554bfd003000 100644
--- a/Documentation/devicetree/bindings/display/bridge/ti,sn65dsi86.yaml
+++ b/Documentation/devicetree/bindings/display/bridge/ti,sn65dsi86.yaml
@@ -60,6 +60,10 @@ properties:
     const: 1
     description: See ../../pwm/pwm.yaml for description of the cell formats.
 
+  hpd-gpios:
+    maxItems: 1
+    description: If present use the given GPIO for hot-plug-detect.
+
   data-lanes:
     description: See ../../media/video-interface.txt
 
@@ -148,7 +152,7 @@ examples:
       #address-cells = <1>;
       #size-cells = <0>;
 
-      bridge@2d {
+      sn65dsi86_bridge: bridge@2d {
         compatible = "ti,sn65dsi86";
         reg = <0x2d>;
 
@@ -165,6 +169,10 @@ examples:
         clocks = <&rpmhcc RPMH_LN_BB_CLK2>;
         clock-names = "refclk";
 
+        gpio-controller;
+        #gpio-cells = <2>;
+        hpd-gpios = <&sn65dsi86_bridge 2 GPIO_ACTIVE_HIGH>;
+
         ports {
           #address-cells = <1>;
           #size-cells = <0>;
-- 
2.26.0.110.g2183baf09c-goog