linux-kernel - [PATCH 1/2] dt-bindings: media: video-interfaces: add support for dual edge sampling

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Message-Id: <20220114105755.730200-2-michael.riesch@wolfvision.net>
Date:   Fri, 14 Jan 2022 11:57:54 +0100
From:   Michael Riesch <michael.riesch@...fvision.net>
To:     linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Ezequiel Garcia <ezequiel@...guardiasur.com.ar>,
        Jacopo Mondi <jacopo@...ndi.org>,
        Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
        Daniel Scally <djrscally@...il.com>,
        Niklas Söderlund 
        <niklas.soderlund+renesas@...natech.se>,
        Michael Riesch <michael.riesch@...fvision.net>
Subject: [PATCH 1/2] dt-bindings: media: video-interfaces: add support for dual edge sampling

Some devices support sampling of the parallel data at both edges of the
interface pixel clock in order to reduce the pixel clock by two.
Use the pclk-sample property to reflect this feature in the device tree.

Signed-off-by: Michael Riesch <michael.riesch@...fvision.net>
---
 .../devicetree/bindings/media/video-interfaces.yaml          | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/media/video-interfaces.yaml b/Documentation/devicetree/bindings/media/video-interfaces.yaml
index 4391dce2caee..b7f77a255778 100644
--- a/Documentation/devicetree/bindings/media/video-interfaces.yaml
+++ b/Documentation/devicetree/bindings/media/video-interfaces.yaml
@@ -144,9 +144,10 @@ properties:
 
   pclk-sample:
     $ref: /schemas/types.yaml#/definitions/uint32
-    enum: [ 0, 1 ]
+    enum: [ 0, 1, 2 ]
     description:
-      Sample data on rising (1) or falling (0) edge of the pixel clock signal.
+      Sample data on falling (0), rising (1) or both (2) edges of the pixel
+      clock signal.
 
   sync-on-green-active:
     $ref: /schemas/types.yaml#/definitions/uint32
-- 
2.30.2