On Wed, Aug 12, 2015 at 7:56 PM, Eric Anholt <eric@xxxxxxxxxx> wrote:
> Signed-off-by: Eric Anholt <eric@xxxxxxxxxx>
> ---
> .../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 controller
> + itself). 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
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