linux-kernel - [PATCH v2 1/7] dt-bindings: display: panel: properly document LG LD070WX3 panel

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Message-ID: <20251008082800.67718-2-clamor95@gmail.com>
Date: Wed,  8 Oct 2025 11:27:53 +0300
From: Svyatoslav Ryhel <clamor95@...il.com>
To: Neil Armstrong <neil.armstrong@...aro.org>,
	Jessica Zhang <quic_jesszhan@...cinc.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Thierry Reding <thierry.reding@...il.com>,
	Jonathan Hunter <jonathanh@...dia.com>,
	Douglas Anderson <dianders@...omium.org>,
	Svyatoslav Ryhel <clamor95@...il.com>,
	Sam Ravnborg <sam@...nborg.org>
Cc: dri-devel@...ts.freedesktop.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-tegra@...r.kernel.org
Subject: [PATCH v2 1/7] dt-bindings: display: panel: properly document LG LD070WX3 panel

LG LD070WX3-SL01 was mistakenly documented as a simple DSI panel, which it
clearly is not. Address this by adding the proper schema for this panel.

There is only one user of this panel binding in the mainline Linux kernel,
which is the Nvidia tablet Tegra Note 7. Its panel is broken anyway since
it cannot initialize properly if the bootloader does not leave a
pre-initialized panel. It also cannot suspend or re-initialize properly,
since no DSI configuration is set and it has a loose regulator which
relies on an always-on property rather than being hooked to the panel
where it belongs.

Tegra Note 7 device tree is adjusted as a part of this series.

Signed-off-by: Svyatoslav Ryhel <clamor95@...il.com>
---
 .../bindings/display/panel/lg,ld070wx3.yaml   | 60 +++++++++++++++++++
 .../display/panel/panel-simple-dsi.yaml       |  2 -
 2 files changed, 60 insertions(+), 2 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/display/panel/lg,ld070wx3.yaml

diff --git a/Documentation/devicetree/bindings/display/panel/lg,ld070wx3.yaml b/Documentation/devicetree/bindings/display/panel/lg,ld070wx3.yaml
new file mode 100644
index 000000000000..0a82cf311452
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/panel/lg,ld070wx3.yaml
@@ -0,0 +1,60 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/panel/lg,ld070wx3.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: LG Corporation 7" WXGA TFT LCD panel
+
+maintainers:
+  - Svyatoslav Ryhel <clamor95@...il.com>
+
+allOf:
+  - $ref: panel-common.yaml#
+
+properties:
+  compatible:
+    items:
+      - const: lg,ld070wx3-sl01
+
+  reg:
+    maxItems: 1
+
+  vdd-supply: true
+  vcc-supply: true
+
+  backlight: true
+  port: true
+
+required:
+  - compatible
+  - vdd-supply
+  - vcc-supply
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    dsi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        panel@0 {
+            compatible = "lg,ld070wx3-sl01";
+            reg = <0>;
+
+            vdd-supply = <&vdd_3v3_lcd>;
+            vcc-supply = <&vcc_1v8_lcd>;
+
+            backlight = <&backlight>;
+
+            port {
+                endpoint {
+                    remote-endpoint = <&dsi0_out>;
+                };
+            };
+        };
+    };
+...
diff --git a/Documentation/devicetree/bindings/display/panel/panel-simple-dsi.yaml b/Documentation/devicetree/bindings/display/panel/panel-simple-dsi.yaml
index 9b92a05791cc..f9f1e76a810c 100644
--- a/Documentation/devicetree/bindings/display/panel/panel-simple-dsi.yaml
+++ b/Documentation/devicetree/bindings/display/panel/panel-simple-dsi.yaml
@@ -42,8 +42,6 @@ properties:
       - kingdisplay,kd097d04
         # LG ACX467AKM-7 4.95" 1080×1920 LCD Panel
       - lg,acx467akm-7
-        # LG Corporation 7" WXGA TFT LCD panel
-      - lg,ld070wx3-sl01
         # LG Corporation 5" HD TFT LCD panel
       - lg,lh500wx1-sd03
         # Lincoln LCD197 5" 1080x1920 LCD panel
-- 
2.48.1