Commit | Line | Data |
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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 | }; |