dt-bindings: msm: dsi: document phy-type property for 7nm dsi phy

Document a new phy-type property which will be used to determine whether
the phy should operate in D-PHY or C-PHY mode.

Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://lore.kernel.org/r/20210617144349.28448-3-jonathan@marek.ca
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>

Documentation/devicetree/bindings/display/msm/dsi-phy-7nm.yaml

@@ -34,6 +34,11 @@ properties:
     description: |
       Connected to VDD_A_DSI_PLL_0P9 pin (or VDDA_DSI{0,1}_PLL_0P9 for sm8150)
 
+  phy-type:
+    description: D-PHY (default) or C-PHY mode
+    enum: [ 10, 11 ]
+    default: 10
+
 required:
   - compatible
   - reg

include/dt-bindings/phy/phy.h

@@ -20,5 +20,7 @@
 #define PHY_TYPE_XPCS		7
 #define PHY_TYPE_SGMII		8
 #define PHY_TYPE_QSGMII		9
+#define PHY_TYPE_DPHY		10
+#define PHY_TYPE_CPHY		11
 
 #endif /* _DT_BINDINGS_PHY */