linux-kernel - [PATCH 1/2] dt-bindings: display: bridge: waveshare,dsi2dpi: Document 1..4 DSI lane support

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Message-ID: <20260112234834.226128-1-marek.vasut+renesas@mailbox.org>
Date: Tue, 13 Jan 2026 00:47:38 +0100
From: Marek Vasut <marek.vasut+renesas@...lbox.org>
To: dri-devel@...ts.freedesktop.org
Cc: Marek Vasut <marek.vasut+renesas@...lbox.org>,
	Andrzej Hajda <andrzej.hajda@...el.com>,
	Conor Dooley <conor+dt@...nel.org>,
	David Airlie <airlied@...il.com>,
	Jernej Skrabec <jernej.skrabec@...il.com>,
	Jonas Karlman <jonas@...boo.se>,
	Joseph Guo <qijian.guo@....com>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	Rob Herring <robh@...nel.org>,
	Robert Foss <rfoss@...nel.org>,
	Simona Vetter <simona@...ll.ch>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org
Subject: [PATCH 1/2] dt-bindings: display: bridge: waveshare,dsi2dpi: Document 1..4 DSI lane support

Describe 1..4 DSI lanes as supported. Internally, this bridge is
an ChipOne ICN6211 which loads its register configuration from a
dedicated storage and its I2C does not seem to be accessible. The
ICN6211 supports up to 4 DSI lanes, so this is a hard limit for
this bridge. The lane configuration is preconfigured in the bridge
for each of the WaveShare panels.

Signed-off-by: Marek Vasut <marek.vasut+renesas@...lbox.org>
---
Cc: Andrzej Hajda <andrzej.hajda@...el.com>
Cc: Conor Dooley <conor+dt@...nel.org>
Cc: David Airlie <airlied@...il.com>
Cc: Jernej Skrabec <jernej.skrabec@...il.com>
Cc: Jonas Karlman <jonas@...boo.se>
Cc: Joseph Guo <qijian.guo@....com>
Cc: Krzysztof Kozlowski <krzk+dt@...nel.org>
Cc: Laurent Pinchart <Laurent.pinchart@...asonboard.com>
Cc: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>
Cc: Maxime Ripard <mripard@...nel.org>
Cc: Neil Armstrong <neil.armstrong@...aro.org>
Cc: Rob Herring <robh@...nel.org>
Cc: Robert Foss <rfoss@...nel.org>
Cc: Simona Vetter <simona@...ll.ch>
Cc: Thomas Zimmermann <tzimmermann@...e.de>
Cc: devicetree@...r.kernel.org
Cc: dri-devel@...ts.freedesktop.org
Cc: linux-kernel@...r.kernel.org
Cc: linux-renesas-soc@...r.kernel.org
---
 .../devicetree/bindings/display/bridge/waveshare,dsi2dpi.yaml  | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/bridge/waveshare,dsi2dpi.yaml b/Documentation/devicetree/bindings/display/bridge/waveshare,dsi2dpi.yaml
index 5e8498c8303dd..3820dd7e11af1 100644
--- a/Documentation/devicetree/bindings/display/bridge/waveshare,dsi2dpi.yaml
+++ b/Documentation/devicetree/bindings/display/bridge/waveshare,dsi2dpi.yaml
@@ -40,9 +40,12 @@ properties:
             properties:
               data-lanes:
                 description: array of physical DSI data lane indexes.
+                minItems: 1
                 items:
                   - const: 1
                   - const: 2
+                  - const: 3
+                  - const: 4
 
             required:
               - data-lanes
-- 
2.51.0