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Message-Id: <20250912181419.1114695-1-Frank.Li@nxp.com>
Date: Fri, 12 Sep 2025 14:14:18 -0400
From: Frank Li <Frank.Li@....com>
To: Andrzej Hajda <andrzej.hajda@...el.com>,
Neil Armstrong <neil.armstrong@...aro.org>,
Robert Foss <rfoss@...nel.org>,
Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
Jonas Karlman <jonas@...boo.se>,
Jernej Skrabec <jernej.skrabec@...il.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>,
Peter Senna Tschudin <peter.senna@...il.com>,
Ian Ray <ian.ray@...com>,
Martyn Welch <martyn.welch@...labora.co.uk>,
dri-devel@...ts.freedesktop.org (open list:DRM DRIVERS),
devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS),
linux-kernel@...r.kernel.org (open list)
Cc: imx@...ts.linux.dev
Subject: [PATCH 1/1] dt-bindings: display: bridge: convert megachips-stdpxxxx-ge-b850v3-fw.txt to yaml
Convert megachips-stdpxxxx-ge-b850v3-fw.txt to yaml format.
Additional changes:
- Only keep one example.
Signed-off-by: Frank Li <Frank.Li@....com>
---
.../megachips,stdp2690-ge-b850v3-fw.yaml | 105 ++++++++++++++++++
.../megachips-stdpxxxx-ge-b850v3-fw.txt | 91 ---------------
2 files changed, 105 insertions(+), 91 deletions(-)
create mode 100644 Documentation/devicetree/bindings/display/bridge/megachips,stdp2690-ge-b850v3-fw.yaml
delete mode 100644 Documentation/devicetree/bindings/display/bridge/megachips-stdpxxxx-ge-b850v3-fw.txt
diff --git a/Documentation/devicetree/bindings/display/bridge/megachips,stdp2690-ge-b850v3-fw.yaml b/Documentation/devicetree/bindings/display/bridge/megachips,stdp2690-ge-b850v3-fw.yaml
new file mode 100644
index 0000000000000..6b5cfc41f7414
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/bridge/megachips,stdp2690-ge-b850v3-fw.yaml
@@ -0,0 +1,105 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/bridge/megachips,stdp2690-ge-b850v3-fw.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: GE B850v3 video bridge
+
+maintainers:
+ - Frank Li <Frank.Li@....com>
+
+description: |
+ STDP4028-ge-b850v3-fw bridges (LVDS-DP)
+ STDP2690-ge-b850v3-fw bridges (DP-DP++)
+
+ The video processing pipeline on the second output on the GE B850v3:
+
+ Host -> LVDS|--(STDP4028)--|DP -> DP|--(STDP2690)--|DP++ -> Video output
+
+ Each bridge has a dedicated flash containing firmware for supporting the custom
+ design. The result is that, in this design, neither the STDP4028 nor the
+ STDP2690 behave as the stock bridges would. The compatible strings include the
+ suffix "-ge-b850v3-fw" to make it clear that the driver is for the bridges with
+ the firmware specific for the GE B850v3.
+
+ The hardware do not provide control over the video processing pipeline, as the
+ two bridges behaves as a single one. The only interfaces exposed by the
+ hardware are EDID, HPD, and interrupts.
+
+properties:
+ compatible:
+ enum:
+ - megachips,stdp4028-ge-b850v3-fw
+ - megachips,stdp2690-ge-b850v3-fw
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ ports:
+ $ref: /schemas/graph.yaml#/properties/ports
+ properties:
+ port@0:
+ $ref: /schemas/graph.yaml#/properties/port
+
+ port@1:
+ $ref: /schemas/graph.yaml#/properties/port
+
+required:
+ - compatible
+ - reg
+ - ports
+
+allOf:
+ - if:
+ properties:
+ compatible:
+ contains:
+ const: megachips,stdp4028-ge-b850v3-fw
+ then:
+ required:
+ - interrupts
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/irq.h>
+
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ bridge@73 {
+ compatible = "megachips,stdp4028-ge-b850v3-fw";
+ reg = <0x73>;
+ interrupt-parent = <&gpio2>;
+ interrupts = <0 IRQ_TYPE_LEVEL_HIGH>;
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+
+ endpoint {
+ remote-endpoint = <&lvds0_out>;
+ };
+
+ };
+
+ port@1 {
+ reg = <1>;
+
+ endpoint {
+ remote-endpoint = <&stdp2690_in>;
+ };
+ };
+ };
+ };
+ };
+
diff --git a/Documentation/devicetree/bindings/display/bridge/megachips-stdpxxxx-ge-b850v3-fw.txt b/Documentation/devicetree/bindings/display/bridge/megachips-stdpxxxx-ge-b850v3-fw.txt
deleted file mode 100644
index 09e0a21f705ef..0000000000000
--- a/Documentation/devicetree/bindings/display/bridge/megachips-stdpxxxx-ge-b850v3-fw.txt
+++ /dev/null
@@ -1,91 +0,0 @@
-Drivers for the second video output of the GE B850v3:
- STDP4028-ge-b850v3-fw bridges (LVDS-DP)
- STDP2690-ge-b850v3-fw bridges (DP-DP++)
-
-The video processing pipeline on the second output on the GE B850v3:
-
- Host -> LVDS|--(STDP4028)--|DP -> DP|--(STDP2690)--|DP++ -> Video output
-
-Each bridge has a dedicated flash containing firmware for supporting the custom
-design. The result is that, in this design, neither the STDP4028 nor the
-STDP2690 behave as the stock bridges would. The compatible strings include the
-suffix "-ge-b850v3-fw" to make it clear that the driver is for the bridges with
-the firmware specific for the GE B850v3.
-
-The hardware do not provide control over the video processing pipeline, as the
-two bridges behaves as a single one. The only interfaces exposed by the
-hardware are EDID, HPD, and interrupts.
-
-stdp4028-ge-b850v3-fw required properties:
- - compatible : "megachips,stdp4028-ge-b850v3-fw"
- - reg : I2C bus address
- - interrupts : one interrupt should be described here, as in
- <0 IRQ_TYPE_LEVEL_HIGH>
- - ports : One input port(reg = <0>) and one output port(reg = <1>)
-
-stdp2690-ge-b850v3-fw required properties:
- compatible : "megachips,stdp2690-ge-b850v3-fw"
- - reg : I2C bus address
- - ports : One input port(reg = <0>) and one output port(reg = <1>)
-
-Example:
-
-&mux2_i2c2 {
- clock-frequency = <100000>;
-
- stdp4028@73 {
- compatible = "megachips,stdp4028-ge-b850v3-fw";
- #address-cells = <1>;
- #size-cells = <0>;
-
- reg = <0x73>;
-
- interrupt-parent = <&gpio2>;
- interrupts = <0 IRQ_TYPE_LEVEL_HIGH>;
-
- ports {
- #address-cells = <1>;
- #size-cells = <0>;
-
- port@0 {
- reg = <0>;
- stdp4028_in: endpoint {
- remote-endpoint = <&lvds0_out>;
- };
- };
- port@1 {
- reg = <1>;
- stdp4028_out: endpoint {
- remote-endpoint = <&stdp2690_in>;
- };
- };
- };
- };
-
- stdp2690@72 {
- compatible = "megachips,stdp2690-ge-b850v3-fw";
- #address-cells = <1>;
- #size-cells = <0>;
-
- reg = <0x72>;
-
- ports {
- #address-cells = <1>;
- #size-cells = <0>;
-
- port@0 {
- reg = <0>;
- stdp2690_in: endpoint {
- remote-endpoint = <&stdp4028_out>;
- };
- };
-
- port@1 {
- reg = <1>;
- stdp2690_out: endpoint {
- /* Connector for external display */
- };
- };
- };
- };
-};
--
2.34.1
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