Re: [PATCH 3/5] dt-bindings: display: simple-bridge: Document DPI color encoder

Rob Herring
2025-03-04T15:23:21Z

On Tue, Mar 04, 2025 at 06:15:28PM +0800, Liu Ying wrote:
> A DPI color encoder, as a simple display bridge, converts input DPI color
> coding to output DPI color coding, like Adafruit Kippah DPI hat[1] which
> converts input 18-bit pixel data to 24-bit pixel data(with 2 low padding
> bits in every color component though). Document the DPI color encoder.

Why do we need a node for this? Isn't this just wired how it is wired
and there's nothing for s/w to see or do? I suppose if you are trying to
resolve the mode with 24-bit on one end and 18-bit on the other end, you
need to allow that and not require an exact match. You still might need
to figure out which pins the 18-bit data comes out on, but you have that
problem with an 18-bit panel too. IOW, how is this any different if you
have an 18-bit panel versus 24-bit panel?

Rob