Re: [PATCH 6/15] dt-bindings: display: sun4i: Add HDMI display bindings

Hi Rob,

On Wed, Mar 15, 2017 at 12:26:22PM -0500, Rob Herring wrote:

...

+HDMI Encoder +------------

+The HDMI Encoder supports the HDMI video and audio outputs, and does +CEC. It is one end of the pipeline.

+Required properties:

• • compatible: value must be one of:
• • allwinner,sun5i-a10s-hdmi
• • reg: base address and size of memory-mapped region
• • clocks: phandles to the clocks feeding the HDMI encoder
• • ahb: the HDMI interface clock
• • mod: the HDMI module clock
• • pll-0: the first video PLL
• • pll-1: the second video PLL
• • clock-names: the clock names mentioned above
• • ports: A ports node with endpoint definitions as defined in
• Documentation/devicetree/bindings/media/video-interfaces.txt. The
• first port should be the input endpoint.

You need an output port to an HDMI connector node and an audio port.

I started to look at the audio, and I can't find a use for an audio port in the OF graph. As far as I understand, we will be using the hdmi-codec, that still requires an ASoC card to create the link between our i2s controller and the HDMI controller.

This work perfectly for us, but as far as I know, the simple-card stuff only requires a phandle, and not an OF graph endpoint, right?

Thanks! Maxime