linux-kernel - [PATCH/RFC 02/12] dt-bindings: display: renesas: lvds: Document renesas,swap-data

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Message-Id: <1564731249-22671-3-git-send-email-fabrizio.castro@bp.renesas.com>
Date:   Fri,  2 Aug 2019 08:33:59 +0100
From:   Fabrizio Castro <fabrizio.castro@...renesas.com>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
        Jacopo Mondi <jacopo+renesas@...ndi.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>
Cc:     Fabrizio Castro <fabrizio.castro@...renesas.com>,
        dri-devel@...ts.freedesktop.org, linux-renesas-soc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Simon Horman <horms@...ge.net.au>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Chris Paterson <Chris.Paterson2@...esas.com>,
        Biju Das <biju.das@...renesas.com>
Subject: [PATCH/RFC 02/12] dt-bindings: display: renesas: lvds: Document renesas,swap-data

R-Car D3, R-Car E3, and RZ/G2E support dual-link mode.
In such a mode, the first LVDS encoder emits even data, and the
second LVDS encoder emits odd data. This patch documents property
renesas,swap-data, used to swap even and odd data around.

Signed-off-by: Fabrizio Castro <fabrizio.castro@...renesas.com>
---
 Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt b/Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt
index dece79e..8980179 100644
--- a/Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt
+++ b/Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt
@@ -52,6 +52,11 @@ Optional properties:
   mandatory for the first LVDS encoder on R-Car D3, R-Car E3, and RZ/G2E SoCs,
   and shall point to the second encoder to be used as a companion in dual-link
   mode. It shall not be set for any other LVDS encoder.
+- renesas,swap-data : when in dual-link mode, the first LVDS encoder normally
+  emits even data, and the second LVDS encoder emits odd data. When property
+  renesas,swap-data is specified, the data emitted by the two encoders will be
+  swapped around. This property can only be used in conjunction with property
+  renesas,companion.
 
 
 Example:
-- 
2.7.4