drm/vc4: Add DPI driver
The DPI interface involves taking a ton of our GPIOs to be used as
outputs, and routing display signals over them in parallel.
v2: Use display_info.bus_formats[] to replace our custom DT
properties.
v3: Rebase on V3D documentation changes.
v4: Fix rebase detritus from V3D documentation changes.
Signed-off-by: Eric Anholt <eric@anholt.net>
Acked-by: Rob Herring <robh@kernel.org>
diff --git a/Documentation/devicetree/bindings/display/brcm,bcm-vc4.txt b/Documentation/devicetree/bindings/display/brcm,bcm-vc4.txt
index 9f97df4..a5ea451 100644
--- a/Documentation/devicetree/bindings/display/brcm,bcm-vc4.txt
+++ b/Documentation/devicetree/bindings/display/brcm,bcm-vc4.txt
@@ -35,12 +35,22 @@
as an interrupt/status bit in the HDMI controller
itself). See bindings/pinctrl/brcm,bcm2835-gpio.txt
+Required properties for DPI:
+- compatible: Should be "brcm,bcm2835-dpi"
+- reg: Physical base address and length of the registers
+- clocks: a) core: The core clock the unit runs on
+ b) pixel: The pixel clock that feeds the pixelvalve
+- port: Port node with a single endpoint connecting to the panel
+ device, as defined in [1]
+
Required properties for V3D:
- compatible: Should be "brcm,bcm2835-v3d"
- reg: Physical base address and length of the V3D's registers
- interrupts: The interrupt number
See bindings/interrupt-controller/brcm,bcm2835-armctrl-ic.txt
+[1] Documentation/devicetree/bindings/media/video-interfaces.txt
+
Example:
pixelvalve@7e807000 {
compatible = "brcm,bcm2835-pixelvalve2";
@@ -66,6 +76,22 @@
clock-names = "pixel", "hdmi";
};
+dpi: dpi@7e208000 {
+ compatible = "brcm,bcm2835-dpi";
+ reg = <0x7e208000 0x8c>;
+ clocks = <&clocks BCM2835_CLOCK_VPU>,
+ <&clocks BCM2835_CLOCK_DPI>;
+ clock-names = "core", "pixel";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port {
+ dpi_out: endpoint@0 {
+ remote-endpoint = <&panel_in>;
+ };
+ };
+};
+
v3d: v3d@7ec00000 {
compatible = "brcm,bcm2835-v3d";
reg = <0x7ec00000 0x1000>;
@@ -75,3 +101,13 @@
vc4: gpu {
compatible = "brcm,bcm2835-vc4";
};
+
+panel: panel {
+ compatible = "ontat,yx700wv03", "simple-panel";
+
+ port {
+ panel_in: endpoint {
+ remote-endpoint = <&dpi_out>;
+ };
+ };
+};
