From mboxrd@z Thu Jan 1 00:00:00 1970 From: eric@anholt.net (Eric Anholt) Date: Wed, 12 Aug 2015 17:56:14 -0700 Subject: [PATCH 1/7] drm/vc4: Add devicetree bindings for VC4. In-Reply-To: <1439427380-2436-1-git-send-email-eric@anholt.net> References: <1439427380-2436-1-git-send-email-eric@anholt.net> Message-ID: <1439427380-2436-2-git-send-email-eric@anholt.net> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Signed-off-by: Eric Anholt --- .../devicetree/bindings/gpu/brcm,bcm-vc4.txt | 83 ++++++++++++++++++++++ 1 file changed, 83 insertions(+) create mode 100644 Documentation/devicetree/bindings/gpu/brcm,bcm-vc4.txt diff --git a/Documentation/devicetree/bindings/gpu/brcm,bcm-vc4.txt b/Documentation/devicetree/bindings/gpu/brcm,bcm-vc4.txt new file mode 100644 index 0000000..2b13e61 --- /dev/null +++ b/Documentation/devicetree/bindings/gpu/brcm,bcm-vc4.txt @@ -0,0 +1,83 @@ +Broadcom VC4 GPU + +The VC4 device present on the Raspberry Pi includes a display system +with HDMI output and the HVS scaler for compositing display planes. + +Required properties for VC4: +- compatible: Should be "brcm,vc4" +- crtcs: List of references to pixelvalve scanout engines +- hvss: List of references to HVS video scalers +- encoders: List of references to output encoders (HDMI, SDTV) + +Required properties for Pixel Valve: +- compatible: Should be "brcm,vc4-pixelvalve" +- 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,vc4-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,vc4-hdmi" +- reg: Physical base address and length of the two register ranges + ("HDMI" and "HD") +- interrupts: The interrupt numbers + See bindings/interrupt-controller/brcm,bcm2835-armctrl-ic.txt +- ddc: phandle of the I2C controller used for DDC EDID probing +- crtc: phandle to the pixelvalve CRTC the HDMI encoder is attached to + +Optional properties for HDMI: +- hpd-gpio: 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 + +Example: +/ { + soc { + pv0: brcm,vc4-pixelvalve at 7e206000 { + compatible = "brcm,vc4-pixelvalve"; + reg = <0x7e206000 0x100>; + interrupts = <2 13>; /* pwa2 */ + }; + + pv1: brcm,vc4-pixelvalve at 7e207000 { + compatible = "brcm,vc4-pixelvalve"; + reg = <0x7e207000 0x100>; + interrupts = <2 14>; /* pwa1 */ + }; + + pv2: brcm,vc4-pixelvalve at 7e807000 { + compatible = "brcm,vc4-pixelvalve"; + reg = <0x7e807000 0x100>; + interrupts = <2 10>; /* pixelvalve */ + }; + + hvs: brcm,hvs at 7e400000 { + compatible = "brcm,vc4-hvs"; + reg = <0x7e400000 0x6000>; + interrupts = <2 1>; + }; + + hdmi: brcm,vc4-hdmi at 7e902000 { + compatible = "brcm,vc4-hdmi"; + reg = <0x7e902000 0x600>, + <0x7e808000 0x100>; + interrupts = <2 8>, <2 9>; + ddc = <&i2c2>; + hpd-gpio = <&gpio 46 GPIO_ACTIVE_HIGH>; + crtc = <&pv2>; + }; + + vc4: vc4 at 0x7e4c0000 { + compatible = "brcm,vc4"; + + crtcs = <&pv0>, <&pv1>, <&pv2>; + encoders = <&hdmi>; + hvss = <&hvs>; + }; + }; +}; -- 2.1.4