Re: [PATCH v3 2/5] dt-bindings: phy: rockchip,rk3588-mipi-dcphy: allow DSI and CSI consumers

The Samsung MIPI D-/C-PHY block on RK3588 drives a MIPI DSI
transmitter and, on the same PHY, can receive from a MIPI CSI camera.
Describing both as independent consumers of one PHY requires the
devicetree to tell them apart.

Let the existing single cell also take PHY_TYPE_DSI or PHY_TYPE_CSI,
selecting the PHY by the protocol the consumer speaks. PHY_TYPE_DPHY
stays accepted and equivalent to PHY_TYPE_DSI so shipped device trees
remain valid, and PHY_TYPE_CPHY keeps selecting a C-PHY transmitter.
The receiver support added by this series is D-PHY only.

Signed-off-by: Jason Yang <redacted>
Assisted-by: Claude:claude-fable-5
---
 .../devicetree/bindings/phy/rockchip,rk3588-mipi-dcphy.yaml   | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/phy/rockchip,rk3588-mipi-dcphy.yaml b/Documentation/devicetree/bindings/phy/rockchip,rk3588-mipi-dcphy.yaml
index c8ff5ba22a86..1f7c2e2ddfc1 100644
--- a/Documentation/devicetree/bindings/phy/rockchip,rk3588-mipi-dcphy.yaml
+++ b/Documentation/devicetree/bindings/phy/rockchip,rk3588-mipi-dcphy.yaml

@@ -22,9 +22,14 @@ properties:
   "#phy-cells":
     const: 1
     description: |
-      Argument is mode to operate in. Supported modes are:
-        - PHY_TYPE_DPHY
-        - PHY_TYPE_CPHY
+      The block contains a MIPI transmitter and a MIPI receiver, which
+      can be referenced independently. The argument selects one of
+      them:
+        - PHY_TYPE_DSI: the transmitter, for a MIPI DSI host
+        - PHY_TYPE_CSI: the receiver, for a MIPI CSI-2 host
+        - PHY_TYPE_DPHY: the transmitter in D-PHY mode; equivalent to
+          PHY_TYPE_DSI and kept for existing device trees
+        - PHY_TYPE_CPHY: the transmitter in C-PHY mode