[PATCH v2 1/2] dt-bindings: meson: add specific simplefb bindings

Maxime Jourdan
2019-01-07T09:53:24Z

Similar to simple-framebuffer-sunxi, we support different display pipelines
that the firmware is free to choose from.

This documents the "amlogic,simple-framebuffer" compatible and the
"amlogic,pipeline" extension.

Signed-off-by: Maxime Jourdan <mjourdan@baylibre.com>
---
.../display/simple-framebuffer-meson.txt | 33 +++++++++++++++++++
1 file changed, 33 insertions(+)
create mode 100644 Documentation/devicetree/bindings/display/simple-framebuffer-meson.txt

diff --git a/Documentation/devicetree/bindings/display/simple-framebuffer-meson.txt b/Documentation/devicetree/bindings/display/simple-framebuffer-meson.txt
new file mode 100644
index 000000000000..aaa6c24c8e70
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/simple-framebuffer-meson.txt
@@ -0,0 +1,33 @@
+Meson specific Simple Framebuffer bindings
+
+This binding documents meson specific extensions to the simple-framebuffer
+bindings. The meson simplefb u-boot code relies on the devicetree containing
+pre-populated simplefb nodes.
+
+These extensions are intended so that u-boot can select the right node based
+on which pipeline is being used. As such they are solely intended for
+firmware / bootloader use, and the OS should ignore them.
+
+Required properties:
+- compatible: "amlogic,simple-framebuffer", "simple-framebuffer"
+- amlogic,pipeline, one of:
+ "vpu-cvbs"
+ "vpu-hdmi"
+
+Example:
+
+chosen {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+
+ simplefb_hdmi: framebuffer-hdmi {
+ compatible = "amlogic,simple-framebuffer",
+ "simple-framebuffer";
+ amlogic,pipeline = "vpu-hdmi";
+ clocks = <&clkc CLKID_HDMI_PCLK>,
+ <&clkc CLKID_CLK81>,
+ <&clkc CLKID_GCLK_VENCI_INT0>;
+ power-domains = <&pwrc_vpu>;
+ };
+};
--
2.20.1