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From:   Douglas Anderson <dianders@chromium.org>
To:     linus.walleij@linaro.org, bgolaszewski@baylibre.com,
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Subject: [PATCH v3 2/6] dt-bindings: display: Add hpd-gpios to panel-common bindings
Date:   Thu, 23 Apr 2020 09:25:44 -0700
Message-Id: <20200423092431.v3.2.I1976736b400a3b30e46efa47782248b86b3bc627@changeid>
In-Reply-To: <20200423162548.129661-1-dianders@chromium.org>
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In the cases where there is no connector in a system there's no great
place to put "hpd-gpios".  As per discussion [1] the best place to put
it is in the panel.  Add this to the device tree bindings.

[1] https://lore.kernel.org/r/20200417180819.GE5861@pendragon.ideasonboard.com

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
---

Changes in v3: None
Changes in v2:
- ("dt-bindings: display: Add hpd-gpios to panel-common...") new for v2

 .../devicetree/bindings/display/panel/panel-common.yaml     | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/panel/panel-common.yaml b/Documentation/devicetree/bindings/display/panel/panel-common.yaml
index ed051ba12084..e9a04a3a4f5f 100644
--- a/Documentation/devicetree/bindings/display/panel/panel-common.yaml
+++ b/Documentation/devicetree/bindings/display/panel/panel-common.yaml
@@ -96,6 +96,12 @@ properties:
       (hot plug detect) signal, but the signal isn't hooked up so we should
       hardcode the max delay from the panel spec when powering up the panel.
 
+  hpd-gpios:
+    maxItems: 1
+    description:
+      If Hot Plug Detect (HPD) is connected to a GPIO in the system rather
+      than a dedicated HPD pin the pin can be specified here.
+
   # Control I/Os
 
   # Many display panels can be controlled through pins driven by GPIOs. The nature
-- 
2.26.1.301.g55bc3eb7cb9-goog