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 Required properties for DPI:
  39 - compatible:   Should be "brcm,bcm2835-dpi"
  40 - reg:          Physical base address and length of the registers
  41 - clocks:       a) core: The core clock the unit runs on
  42                 b) pixel: The pixel clock that feeds the pixelvalve
  43 - port:         Port node with a single endpoint connecting to the panel
  44                   device, as defined in [1]
  45
  46 Required properties for V3D:
  47 - compatible:   Should be "brcm,bcm2835-v3d"
  48 - reg:          Physical base address and length of the V3D's registers
  49 - interrupts:   The interrupt number
  50                   See bindings/interrupt-controller/brcm,bcm2835-armctrl-ic.txt
  51
  52 [1] Documentation/devicetree/bindings/media/video-interfaces.txt
  53
  54 Example:
  55 pixelvalve@7e807000 {
  56         compatible = "brcm,bcm2835-pixelvalve2";
  57         reg = <0x7e807000 0x100>;
  58         interrupts = <2 10>; /* pixelvalve */
  59 };
  60
  61 hvs@7e400000 {
  62         compatible = "brcm,bcm2835-hvs";
  63         reg = <0x7e400000 0x6000>;
  64         interrupts = <2 1>;
  65 };
  66
  67 hdmi: hdmi@7e902000 {
  68         compatible = "brcm,bcm2835-hdmi";
  69         reg = <0x7e902000 0x600>,
  70               <0x7e808000 0x100>;
  71         interrupts = <2 8>, <2 9>;
  72         ddc = <&i2c2>;
  73         hpd-gpios = <&gpio 46 GPIO_ACTIVE_HIGH>;
  74         clocks = <&clocks BCM2835_PLLH_PIX>,
  75                  <&clocks BCM2835_CLOCK_HSM>;
  76         clock-names = "pixel", "hdmi";
  77 };
  78
  79 dpi: dpi@7e208000 {
  80         compatible = "brcm,bcm2835-dpi";
  81         reg = <0x7e208000 0x8c>;
  82         clocks = <&clocks BCM2835_CLOCK_VPU>,
  83                  <&clocks BCM2835_CLOCK_DPI>;
  84         clock-names = "core", "pixel";
  85         #address-cells = <1>;
  86         #size-cells = <0>;
  87
  88         port {
  89                 dpi_out: endpoint@0 {
  90                         remote-endpoint = <&panel_in>;
  91                 };
  92         };
  93 };
  94
  95 v3d: v3d@7ec00000 {
  96         compatible = "brcm,bcm2835-v3d";
  97         reg = <0x7ec00000 0x1000>;
  98         interrupts = <1 10>;
  99 };
 100
 101 vc4: gpu {
 102         compatible = "brcm,bcm2835-vc4";
 103 };
 104
 105 panel: panel {
 106         compatible = "ontat,yx700wv03", "simple-panel";
 107
 108         port {
 109                 panel_in: endpoint {
 110                         remote-endpoint = <&dpi_out>;
 111                 };
 112         };
 113 };