Re: [PATCH v4 1/7] dt-bindings: phy: Add PHY_TYPE_DSI and PHY_TYPE_CSI definitions

[Krzysztof Kozlowski <krzk@kernel.org>]

On Fri, Aug 21, 2026 at 08:02:29PM +0800, Jason Yang wrote:
> A MIPI D-PHY or C-PHY can be a transmitter (DSI) or a receiver (CSI),
> and in some PHY blocks both work at the same time. The existing
> PHY_TYPE_DPHY and PHY_TYPE_CPHY cannot tell whether a consumer wants
> the transmitter or the receiver.

The consumer knows this already, no? Imagine consumer of the phy is some
ISP receiving data over CSI for given port, thus consumer cannot
transmit over that link.

All this seems redundant.

> 
> Add PHY_TYPE_DSI and PHY_TYPE_CSI, so that a binding can select both
> D-PHY or C-PHY and transmitter or receiver. They do not replace
> PHY_TYPE_DPHY/PHY_TYPE_CPHY, which remain the right choice where a cell
> selects the mode. The first user is the Rockchip RK3588 MIPI DC-PHY
> binding.
> 
> Suggested-by: Michael Riesch <michael.riesch@collabora.com>
> Link: https://lore.kernel.org/r/82da3622-9c3a-454c-87bc-fb4ec7adb68d@collabora.com
> Signed-off-by: Jason Yang <jason98166@gmail.com>

Where is any DTS using it? I did a search and no results of upstream
posting.

> ---
>  include/dt-bindings/phy/phy.h | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/include/dt-bindings/phy/phy.h b/include/dt-bindings/phy/phy.h
> index 979b5dfd8353..8ee3f88e6d80 100644
> --- a/include/dt-bindings/phy/phy.h
> +++ b/include/dt-bindings/phy/phy.h
> @@ -24,6 +24,8 @@
>  #define PHY_TYPE_CPHY		11
>  #define PHY_TYPE_USXGMII	12
>  #define PHY_TYPE_XAUI		13
> +#define PHY_TYPE_DSI		14
> +#define PHY_TYPE_CSI		15

DSI and CSI does not look like types of PHY...

Best regards,
Krzysztof