[PATCH v7 1/4] dt-bindings: display: mediatek: update dpi supported chips

[Jitao Shi]

Add decriptions about supported chips, including MT2701 & MT8173 &
mt8183

1. Add more chips support. ex. MT2701 & MT8173 & MT8183
2. Add property "pinctrl-names" to swap pin mode between gpio and dpi mode. Set
   pin mode to gpio oupput-low to avoid leakage current when dpi disable.
3. Add property "pclk-sample" to config the dpi sample on falling (0),
   rising (1), both falling and rising (2).

Signed-off-by: Jitao Shi <jitao.shi at mediatek.com>
---
 .../bindings/display/mediatek/mediatek,dpi.txt         | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.txt b/Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.txt
index b6a7e7397b8b..0dee4f7a227e 100644
--- a/Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.txt
+++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.txt
@@ -7,6 +7,7 @@ output bus.
 
 Required properties:
 - compatible: "mediatek,<chip>-dpi"
+  the supported chips are mt2701 , mt8173 and mt8183.
 - reg: Physical base address and length of the controller's registers
 - interrupts: The interrupt signal from the function block.
 - clocks: device clocks
@@ -16,6 +17,11 @@ Required properties:
   Documentation/devicetree/bindings/graph.txt. This port should be connected
   to the input port of an attached HDMI or LVDS encoder chip.
 
+Optional properties:
+- pinctrl-names: Contain "gpiomode" and "dpimode".
+- pclk-sample: 0: sample in falling edge, 1: sample in rising edge, 2: sample
+  in both falling and rising edge.
+
 Example:
 
 dpi0: dpi at 1401d000 {
@@ -26,6 +32,10 @@ dpi0: dpi at 1401d000 {
 		 <&mmsys CLK_MM_DPI_ENGINE>,
 		 <&apmixedsys CLK_APMIXED_TVDPLL>;
 	clock-names = "pixel", "engine", "pll";
+	pclk-sample = 0;
+	pinctrl-names = "gpiomode", "dpimode";
+	pinctrl-0 = <&dpi_pin_gpio>;
+	pinctrl-1 = <&dpi_pin_func>;
 
 	port {
 		dpi0_out: endpoint {
-- 
2.21.0