linux-kernel - [PATCH v2 2/3] dt-bindings: display: simple: support non-default data-mapping

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Message-Id: <20230523-simplepanel_support_nondefault_datamapping-v2-2-87196f0d0b64@pengutronix.de>
Date:   Tue, 23 May 2023 10:19:42 +0200
From:   Johannes Zink <j.zink@...gutronix.de>
To:     David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Sam Ravnborg <sam@...nborg.org>
Cc:     kernel test robot <lkp@...el.com>,
        Dan Carpenter <error27@...il.com>,
        patchwork-jzi@...gutronix.de, kernel@...gutronix.de,
        Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Johannes Zink <j.zink@...gutronix.de>
Subject: [PATCH v2 2/3] dt-bindings: display: simple: support non-default
 data-mapping

Some Displays support more than just a single default lvds data mapping,
which can be used to run displays on only 3 LVDS lanes in the jeida-18
data-mapping mode.

Add an optional data-mapping property to allow overriding the default
data mapping. As it does not generally apply to any display and bus: use
it selectively on the innolux,g101ice-l01, which supports changing the
data mapping via a strapping pin.

Signed-off-by: Johannes Zink <j.zink@...gutronix.de>

---

Changes:

v1 -> v2: - worked in Rob's review findings (thanks for reviewing my
            work): use extracted common property instead of duplicating
	    the property
	  - refined commit message
	  - add an example dts for automated checking
---
 .../bindings/display/panel/panel-simple.yaml       | 26 +++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/display/panel/panel-simple.yaml b/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
index ec50dd268314..698301c8c920 100644
--- a/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
+++ b/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
@@ -21,9 +21,9 @@ description: |
 
 allOf:
   - $ref: panel-common.yaml#
+  - $ref: ../lvds-data-mapping.yaml#
 
 properties:
-
   compatible:
     enum:
     # compatible must be listed in alphabetical order, ordered by compatible.
@@ -353,6 +353,17 @@ properties:
   power-supply: true
   no-hpd: true
   hpd-gpios: true
+  data-mapping: true
+
+if:
+  not:
+    properties:
+      compatible:
+        contains:
+          const: innolux,g101ice-l01
+then:
+  properties:
+    data-mapping: false
 
 additionalProperties: false
 
@@ -372,3 +383,16 @@ examples:
         };
       };
     };
+  - |
+    panel_lvds: panel-lvds {
+      compatible = "innolux,g101ice-l01";
+      power-supply = <&vcc_lcd_reg>;
+
+      data-mapping = "jeida-24";
+
+      port {
+        panel_in_lvds: endpoint {
+          remote-endpoint = <&ltdc_out_lvds>;
+        };
+      };
+    };

-- 
2.39.2