Signed-off-by: Eric Anholt <eric@xxxxxxxxxx>
---
.../devicetree/bindings/gpu/brcm,bcm-vc4.txt | 83 ++++++++++++++++++++++
1 file changed, 83 insertions(+)
create mode 100644 Documentation/devicetree/bindings/gpu/brcm,bcm-vc4.txt
diff --git a/Documentation/devicetree/bindings/gpu/brcm,bcm-vc4.txt b/Documentation/devicetree/bindings/gpu/brcm,bcm-vc4.txt
new file mode 100644
index 0000000..2b13e61
--- /dev/null
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@@ -0,0 +1,83 @@
+Broadcom VC4 GPU
+
+The VC4 device present on the Raspberry Pi includes a display system
+with HDMI output and the HVS scaler for compositing display planes.
+
+Required properties for VC4:
+- compatible: Should be "brcm,vc4"
+- crtcs: List of references to pixelvalve scanout engines
+- hvss: List of references to HVS video scalers
+- encoders: List of references to output encoders (HDMI, SDTV)
+
+Required properties for Pixel Valve:
+- compatible: Should be "brcm,vc4-pixelvalve"
+- reg: Physical base address and length of the PV's registers
+- interrupts: The interrupt number
+ See bindings/interrupt-controller/brcm,bcm2835-armctrl-ic.txt
+
+Required properties for HVS:
+- compatible: Should be "brcm,vc4-hvs"
+- reg: Physical base address and length of the HVS's registers
+- interrupts: The interrupt number
+ See bindings/interrupt-controller/brcm,bcm2835-armctrl-ic.txt
+
+Required properties for HDMI
+- compatible: Should be "brcm,vc4-hdmi"
+- reg: Physical base address and length of the two register ranges
+ ("HDMI" and "HD")
+- interrupts: The interrupt numbers
+ See bindings/interrupt-controller/brcm,bcm2835-armctrl-ic.txt
+- ddc: phandle of the I2C controller used for DDC EDID probing
+- crtc: phandle to the pixelvalve CRTC the HDMI encoder is attached to
+
+Optional properties for HDMI:
+- hpd-gpio: The GPIO pin for HDMI hotplug detect (if it doesn't appear
+ as an interrupt/status bit in the HDMI controller
+ itself). See bindings/pinctrl/brcm,bcm2835-gpio.txt
+
+Example:
+/ {
+ soc {
+ pv0: brcm,vc4-pixelvalve@7e206000 {
+ compatible = "brcm,vc4-pixelvalve";
+ reg = <0x7e206000 0x100>;
+ interrupts = <2 13>; /* pwa2 */
+ };
+
+ pv1: brcm,vc4-pixelvalve@7e207000 {
+ compatible = "brcm,vc4-pixelvalve";
+ reg = <0x7e207000 0x100>;
+ interrupts = <2 14>; /* pwa1 */
+ };
+
+ pv2: brcm,vc4-pixelvalve@7e807000 {
+ compatible = "brcm,vc4-pixelvalve";
+ reg = <0x7e807000 0x100>;
+ interrupts = <2 10>; /* pixelvalve */
+ };
+
+ hvs: brcm,hvs@7e400000 {
+ compatible = "brcm,vc4-hvs";
+ reg = <0x7e400000 0x6000>;
+ interrupts = <2 1>;
+ };
+
+ hdmi: brcm,vc4-hdmi@7e902000 {
+ compatible = "brcm,vc4-hdmi";
+ reg = <0x7e902000 0x600>,
+ <0x7e808000 0x100>;
+ interrupts = <2 8>, <2 9>;
+ ddc = <&i2c2>;
+ hpd-gpio = <&gpio 46 GPIO_ACTIVE_HIGH>;
+ crtc = <&pv2>;
+ };
+
+ vc4: vc4@0x7e4c0000 {
+ compatible = "brcm,vc4";
+
+ crtcs = <&pv0>, <&pv1>, <&pv2>;
+ encoders = <&hdmi>;
+ hvss = <&hvs>;
+ };
+ };
+};
--
2.1.4
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