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Diffstat (limited to 'Documentation/devicetree/bindings/display/brcm,bcm-vc4.txt')
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1 files changed, 174 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/display/brcm,bcm-vc4.txt b/Documentation/devicetree/bindings/display/brcm,bcm-vc4.txt new file mode 100644 index 000000000..26649b4c4 --- /dev/null +++ b/Documentation/devicetree/bindings/display/brcm,bcm-vc4.txt @@ -0,0 +1,174 @@ +Broadcom VC4 (VideoCore4) GPU + +The VC4 device present on the Raspberry Pi includes a display system +with HDMI output and the HVS (Hardware Video Scaler) for compositing +display planes. + +Required properties for VC4: +- compatible: Should be "brcm,bcm2835-vc4" or "brcm,cygnus-vc4" + +Required properties for Pixel Valve: +- compatible: Should be one of "brcm,bcm2835-pixelvalve0", + "brcm,bcm2835-pixelvalve1", or "brcm,bcm2835-pixelvalve2" +- 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,bcm2835-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,bcm2835-hdmi" +- reg: Physical base address and length of the two register ranges + ("HDMI" and "HD", in that order) +- interrupts: The interrupt numbers + See bindings/interrupt-controller/brcm,bcm2835-armctrl-ic.txt +- ddc: phandle of the I2C controller used for DDC EDID probing +- clocks: a) hdmi: The HDMI state machine clock + b) pixel: The pixel clock. + +Optional properties for HDMI: +- hpd-gpios: 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 +- dmas: Should contain one entry pointing to the DMA channel used to + transfer audio data +- dma-names: Should contain "audio-rx" + +Required properties for DPI: +- compatible: Should be "brcm,bcm2835-dpi" +- reg: Physical base address and length of the registers +- clocks: a) core: The core clock the unit runs on + b) pixel: The pixel clock that feeds the pixelvalve +- port: Port node with a single endpoint connecting to the panel + device, as defined in [1] + +Required properties for VEC: +- compatible: Should be "brcm,bcm2835-vec" +- reg: Physical base address and length of the registers +- clocks: The core clock the unit runs on +- interrupts: The interrupt number + See bindings/interrupt-controller/brcm,bcm2835-armctrl-ic.txt + +Required properties for V3D: +- compatible: Should be "brcm,bcm2835-v3d" or "brcm,cygnus-v3d" +- reg: Physical base address and length of the V3D's registers +- interrupts: The interrupt number + See bindings/interrupt-controller/brcm,bcm2835-armctrl-ic.txt + +Optional properties for V3D: +- clocks: The clock the unit runs on + +Required properties for DSI: +- compatible: Should be "brcm,bcm2835-dsi0" or "brcm,bcm2835-dsi1" +- reg: Physical base address and length of the DSI block's registers +- interrupts: The interrupt number + See bindings/interrupt-controller/brcm,bcm2835-armctrl-ic.txt +- clocks: a) phy: The DSI PLL clock feeding the DSI analog PHY + b) escape: The DSI ESC clock from CPRMAN + c) pixel: The DSI pixel clock from CPRMAN +- clock-output-names: + The 3 clocks output from the DSI analog PHY: dsi[01]_byte, + dsi[01]_ddr2, and dsi[01]_ddr + +Required properties for the TXP (writeback) block: +- compatible: Should be "brcm,bcm2835-txp" +- reg: Physical base address and length of the TXP block's registers +- interrupts: The interrupt number + See bindings/interrupt-controller/brcm,bcm2835-armctrl-ic.txt + +[1] Documentation/devicetree/bindings/media/video-interfaces.txt + +Example: +pixelvalve@7e807000 { + compatible = "brcm,bcm2835-pixelvalve2"; + reg = <0x7e807000 0x100>; + interrupts = <2 10>; /* pixelvalve */ +}; + +hvs@7e400000 { + compatible = "brcm,bcm2835-hvs"; + reg = <0x7e400000 0x6000>; + interrupts = <2 1>; +}; + +hdmi: hdmi@7e902000 { + compatible = "brcm,bcm2835-hdmi"; + reg = <0x7e902000 0x600>, + <0x7e808000 0x100>; + interrupts = <2 8>, <2 9>; + ddc = <&i2c2>; + hpd-gpios = <&gpio 46 GPIO_ACTIVE_HIGH>; + clocks = <&clocks BCM2835_PLLH_PIX>, + <&clocks BCM2835_CLOCK_HSM>; + clock-names = "pixel", "hdmi"; +}; + +dpi: dpi@7e208000 { + compatible = "brcm,bcm2835-dpi"; + reg = <0x7e208000 0x8c>; + clocks = <&clocks BCM2835_CLOCK_VPU>, + <&clocks BCM2835_CLOCK_DPI>; + clock-names = "core", "pixel"; + #address-cells = <1>; + #size-cells = <0>; + + port { + dpi_out: endpoint@0 { + remote-endpoint = <&panel_in>; + }; + }; +}; + +dsi1: dsi@7e700000 { + compatible = "brcm,bcm2835-dsi1"; + reg = <0x7e700000 0x8c>; + interrupts = <2 12>; + #address-cells = <1>; + #size-cells = <0>; + #clock-cells = <1>; + + clocks = <&clocks BCM2835_PLLD_DSI1>, + <&clocks BCM2835_CLOCK_DSI1E>, + <&clocks BCM2835_CLOCK_DSI1P>; + clock-names = "phy", "escape", "pixel"; + + clock-output-names = "dsi1_byte", "dsi1_ddr2", "dsi1_ddr"; + + pitouchscreen: panel@0 { + compatible = "raspberrypi,touchscreen"; + reg = <0>; + + <...> + }; +}; + +vec: vec@7e806000 { + compatible = "brcm,bcm2835-vec"; + reg = <0x7e806000 0x1000>; + clocks = <&clocks BCM2835_CLOCK_VEC>; + interrupts = <2 27>; +}; + +v3d: v3d@7ec00000 { + compatible = "brcm,bcm2835-v3d"; + reg = <0x7ec00000 0x1000>; + interrupts = <1 10>; +}; + +vc4: gpu { + compatible = "brcm,bcm2835-vc4"; +}; + +panel: panel { + compatible = "ontat,yx700wv03", "simple-panel"; + + port { + panel_in: endpoint { + remote-endpoint = <&dpi_out>; + }; + }; +}; |