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

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.

Suggested-by: Michael Riesch <[email protected]>
Signed-off-by: Jason Yang <[email protected]>
Assisted-by: Claude:claude-fable-5
---
 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
 
 #define PHY_POL_NORMAL		0
 #define PHY_POL_INVERT		1

-- 
2.43.0