Documentation/devicetree/bindings/display/brcm,bcm-vc4.txt

   1 Broadcom VC4 (VideoCore4) GPU
   2
   3 The VC4 device present on the Raspberry Pi includes a display system
   4 with HDMI output and the HVS (Hardware Video Scaler) for compositing
   5 display planes.
   6
   7 Required properties for VC4:
   8 - compatible:   Should be "brcm,bcm2835-vc4"
   9
  10 Required properties for Pixel Valve:
  11 - compatible:   Should be one of "brcm,bcm2835-pixelvalve0",
  12                   "brcm,bcm2835-pixelvalve1", or "brcm,bcm2835-pixelvalve2"
  13 - reg:          Physical base address and length of the PV's registers
  14 - interrupts:   The interrupt number
  15                   See bindings/interrupt-controller/brcm,bcm2835-armctrl-ic.txt
  16
  17 Required properties for HVS:
  18 - compatible:   Should be "brcm,bcm2835-hvs"
  19 - reg:          Physical base address and length of the HVS's registers
  20 - interrupts:   The interrupt number
  21                   See bindings/interrupt-controller/brcm,bcm2835-armctrl-ic.txt
  22
  23 Required properties for HDMI
  24 - compatible:   Should be "brcm,bcm2835-hdmi"
  25 - reg:          Physical base address and length of the two register ranges
  26                   ("HDMI" and "HD", in that order)
  27 - interrupts:   The interrupt numbers
  28                   See bindings/interrupt-controller/brcm,bcm2835-armctrl-ic.txt
  29 - ddc:          phandle of the I2C controller used for DDC EDID probing
  30 - clocks:       a) hdmi: The HDMI state machine clock
  31                 b) pixel: The pixel clock.
  32
  33 Optional properties for HDMI:
  34 - hpd-gpios:    The GPIO pin for HDMI hotplug detect (if it doesn't appear
  35                   as an interrupt/status bit in the HDMI controller
  36                   itself).  See bindings/pinctrl/brcm,bcm2835-gpio.txt
  37
  38 Example:
  39 pixelvalve@7e807000 {
  40         compatible = "brcm,bcm2835-pixelvalve2";
  41         reg = <0x7e807000 0x100>;
  42         interrupts = <2 10>; /* pixelvalve */
  43 };
  44
  45 hvs@7e400000 {
  46         compatible = "brcm,bcm2835-hvs";
  47         reg = <0x7e400000 0x6000>;
  48         interrupts = <2 1>;
  49 };
  50
  51 hdmi: hdmi@7e902000 {
  52         compatible = "brcm,bcm2835-hdmi";
  53         reg = <0x7e902000 0x600>,
  54               <0x7e808000 0x100>;
  55         interrupts = <2 8>, <2 9>;
  56         ddc = <&i2c2>;
  57         hpd-gpios = <&gpio 46 GPIO_ACTIVE_HIGH>;
  58         clocks = <&clocks BCM2835_PLLH_PIX>,
  59                  <&clocks BCM2835_CLOCK_HSM>;
  60         clock-names = "pixel", "hdmi";
  61 };
  62
  63 vc4: gpu {
  64         compatible = "brcm,bcm2835-vc4";
  65 };