linux-kernel - [PATCH 7/9] media: dt-bindings: Add Chameleon v3 framebuffer

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Message-ID: <20240212131323.2162161-8-panikiel@google.com>
Date: Mon, 12 Feb 2024 13:13:21 +0000
From: "Paweł Anikiel" <panikiel@...gle.com>
To: airlied@...il.com, akpm@...ux-foundation.org, conor+dt@...nel.org, 
	daniel@...ll.ch, dinguyen@...nel.org, hverkuil-cisco@...all.nl, 
	krzysztof.kozlowski+dt@...aro.org, maarten.lankhorst@...ux.intel.com, 
	mchehab@...nel.org, mripard@...nel.org, robh+dt@...nel.org, 
	tzimmermann@...e.de
Cc: devicetree@...r.kernel.org, dri-devel@...ts.freedesktop.org, 
	linux-kernel@...r.kernel.org, linux-media@...r.kernel.org, 
	chromeos-krk-upstreaming@...gle.com, ribalda@...omium.org, 
	"Paweł Anikiel" <panikiel@...gle.com>
Subject: [PATCH 7/9] media: dt-bindings: Add Chameleon v3 framebuffer

The Chameleon v3 uses the framebuffer IP core to take the video signal
from different sources and directly write frames into memory.

Signed-off-by: Paweł Anikiel <panikiel@...gle.com>
---
 .../bindings/media/google,chv3-fb.yaml        | 77 +++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/google,chv3-fb.yaml

diff --git a/Documentation/devicetree/bindings/media/google,chv3-fb.yaml b/Documentation/devicetree/bindings/media/google,chv3-fb.yaml
new file mode 100644
index 000000000000..ba6643cc7232
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/google,chv3-fb.yaml
@@ -0,0 +1,77 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/google,chv3-fb.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Google Chameleon v3 video framebuffer
+
+maintainers:
+  - Paweł Anikiel <panikiel@...gle.com>
+
+properties:
+  compatible:
+    const: google,chv3-fb
+
+  reg:
+    items:
+      - description: core registers
+      - description: irq registers
+
+  interrupts:
+    maxItems: 1
+
+  google,legacy-format:
+    type: boolean
+    description: The incoming video stream is in 32-bit padded mode.
+
+  google,no-endpoint:
+    type: boolean
+    description:
+      The framebuffer isn't connected to a controllable endpoint.
+      The video interface still works, but EDID control is unavailable
+      and DV timing information only reports the active video width/height.
+
+  port:
+    $ref: /schemas/graph.yaml#/properties/port
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+allOf:
+  - if:
+      not:
+        required:
+          - google,no-endpoint
+    then:
+      required:
+        - port
+
+additionalProperties: false
+
+examples:
+  - |
+    video@...60500 {
+        compatible = "google,chv3-fb";
+        reg = <0xc0060500 0x100>,
+              <0xc0060f20 0x10>;
+        interrupts = <GIC_SPI 19 IRQ_TYPE_LEVEL_HIGH>;
+        google,legacy-format;
+        google,no-endpoint;
+    };
+
+  - |
+    video@...60600 {
+        compatible = "google,chv3-fb";
+        reg = <0xc0060600 0x100>,
+              <0xc0060f30 0x10>;
+        interrupts = <GIC_SPI 22 IRQ_TYPE_LEVEL_HIGH>;
+
+        port {
+            fb_mst0_0: endpoint {
+                remote-endpoint = <&dprx_mst_0>;
+            };
+        };
+    };
-- 
2.43.0.687.g38aa6559b0-goog