Re: [PATCH v3 1/5] dt-bindings: phy: Add PHY_TYPE_DSI and PHY_TYPE_CSI definitions

[Krzysztof Kozlowski <krzk@kernel.org>]

On Mon, Aug 10, 2026 at 08:10:09PM +0800, Jason Yang wrote:
> MIPI D-PHY and C-PHY blocks are increasingly direction-agnostic: the
> same PHY IP can drive a MIPI DSI display or receive from a MIPI CSI-2
> camera, and combo blocks like the Samsung IP on RK3588 expose both
> directions to independent consumers at the same time. A binding that
> needs to tell the two consumers apart has nothing generic to reach
> for: most constants in this header name a protocol (PHY_TYPE_USB3,
> PHY_TYPE_DP, ...), while the MIPI entries name only the electrical
> layer.
> 
> Add PHY_TYPE_DSI and PHY_TYPE_CSI to select a PHY by the MIPI
> protocol it speaks, which also implies the direction. They do not
> replace PHY_TYPE_DPHY/PHY_TYPE_CPHY, which remain the right choice
> where the cell selects the electrical layer. First user is the
> Rockchip RK3588 MIPI DC-PHY binding.

I read above, but still do not get why TYPE_DPHY/CPHY is not enough.
Isn't DPHY implying it is DSI?

> 
> Suggested-by: Michael Riesch <michael.riesch@collabora.com>
> Signed-off-by: Jason Yang <jason98166@gmail.com>

Your tag goes the last.

> Assisted-by: Claude:claude-fable-5

Two simple defines needed Claude. Great, that probably makes AI
conglomerates very happy that we do not type even two lines anymore and
need their resource-hungry data centers to do that for us.

Best regards,
Krzysztof