projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1f957324 EA |
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 | ||
| 08302c35 EA |
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 | ||
| 4653f22e EA |
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 | ||
| 08302c35 EA |
52 | [1] Documentation/devicetree/bindings/media/video-interfaces.txt |
| 53 | ||
| 1f957324 EA |
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 | ||
| 08302c35 EA |
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 | ||
| 4653f22e EA |
95 | v3d: v3d@7ec00000 { |
| 96 | compatible = "brcm,bcm2835-v3d"; | |
| 97 | reg = <0x7ec00000 0x1000>; | |
| 98 | interrupts = <1 10>; | |
| 99 | }; | |
| 100 | ||
| 1f957324 EA |
101 | vc4: gpu { |
| 102 | compatible = "brcm,bcm2835-vc4"; | |
| 103 | }; | |
| 08302c35 EA |
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 | }; |