linux-kernel - [PATCH 1/2] dt-bindings: display: panel: document Synaptics TDDI panel driver

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Message-Id: <20250612-panel-synaptics-tddi-v1-1-dfb8a425f76c@disroot.org>
Date: Thu, 12 Jun 2025 20:09:40 +0530
From: Kaustabh Chakraborty <kauschluss@...root.org>
To: Neil Armstrong <neil.armstrong@...aro.org>, 
 Jessica Zhang <quic_jesszhan@...cinc.com>, David Airlie <airlied@...il.com>, 
 Simona Vetter <simona@...ll.ch>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Jessica Zhang <jessica.zhang@....qualcomm.com>
Cc: dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Kaustabh Chakraborty <kauschluss@...root.org>
Subject: [PATCH 1/2] dt-bindings: display: panel: document Synaptics TDDI
 panel driver

Document the driver for Synaptics TDDI (Touch/Display Integration) panels.
Along with the MIPI-DSI panel, these devices also have an in-built LED
backlight device and a touchscreen, all packed together in a single chip.
Also, add compatibles for supported panels - TD4101 and TD4300.

Signed-off-by: Kaustabh Chakraborty <kauschluss@...root.org>
---
 .../bindings/display/panel/synaptics,tddi.yaml     | 92 ++++++++++++++++++++++
 1 file changed, 92 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/panel/synaptics,tddi.yaml b/Documentation/devicetree/bindings/display/panel/synaptics,tddi.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..3aae1358a1d764361c072d3b54f74cdf634f7fa8
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/panel/synaptics,tddi.yaml
@@ -0,0 +1,92 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/panel/samsung,tddi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Synaptics TDDI Display Panel Controller
+
+maintainers:
+  - Kaustabh Chakraborty <kauschluss@...root.org>
+
+allOf:
+  - $ref: panel-common.yaml#
+
+properties:
+  compatible:
+    enum:
+      - syna,td4101-panel
+      - syna,td4300-panel
+
+  reg:
+    maxItems: 1
+
+  vio-supply:
+    maxItems: 1
+    description: core I/O voltage supply
+
+  vsn-supply:
+    maxItems: 1
+    description: negative voltage supply for analog circuits
+
+  vsp-supply:
+    maxItems: 1
+    description: positive voltage supply for analog circuits
+
+  backlight-gpios:
+    maxItems: 1
+    description: backlight enable GPIO
+
+  reset-gpios: true
+  width-mm: true
+  height-mm: true
+  panel-timing: true
+
+required:
+  - compatible
+  - reg
+  - width-mm
+  - height-mm
+  - panel-timing
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    dsi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        panel@0 {
+            compatible = "synaptics,td4300-panel";
+            reg = <0>;
+
+            vio-supply = <&panel_vio_reg>;
+            vsn-supply = <&panel_vsn_reg>;
+            vsp-supply = <&panel_vsp_reg>;
+
+            backlight-gpios = <&gpd3 5 GPIO_ACTIVE_LOW>;
+            reset-gpios = <&gpd3 4 GPIO_ACTIVE_LOW>;
+
+            width-mm = <68>;
+            height-mm = <121>;
+
+            panel-timing {
+                clock-frequency = <144389520>;
+
+                hactive = <1080>;
+                hsync-len = <4>;
+                hfront-porch = <120>;
+                hback-porch = <32>;
+
+                vactive = <1920>;
+                vsync-len = <2>;
+                vfront-porch = <21>;
+                vback-porch = <4>;
+            };
+        };
+    };
+
+...

-- 
2.49.0