On Wed, Aug 12, 2015 at 7:56 PM, Eric Anholt eric@anholt.net wrote:
Signed-off-by: Eric Anholt eric@anholt.net
.../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)
Creating these links is what the OF graph binding is for. Please use it. Plus this is a DRMism in the binding.
+Required properties for Pixel Valve: +- compatible: Should be "brcm,vc4-pixelvalve"
There's only one version of IP and all chips have the same bugs? You should have chip names in the compatible strings.
+- 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
Same comment about OF graph.
+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 controlleritself). See bindings/pinctrl/brcm,bcm2835-gpio.txt
Use the hdmi-connector binding. This doesn't belong here. The clue is your comment in parenthesis.
Rob