Add property "pinctrl-names" to swap pin mode between gpio and dpi mode. Set
the dpi pins to gpio mode and output-low to avoid leakage current when dpi
disabled.

Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
---
 .../devicetree/bindings/display/mediatek/mediatek,dpi.txt  | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.txt b/Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.txt
index 58914cf681b8..260ae75ac640 100644
--- a/Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.txt
+++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.txt
@@ -17,6 +17,10 @@ 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 "default" and "sleep".
+  pinctrl-names see Documentation/devicetree/bindings/pinctrlpinctrl-bindings.txt
+
 Example:

 dpi0: dpi@1401d000 {
@@ -27,6 +31,9 @@ dpi0: dpi@1401d000 {
                 <&mmsys CLK_MM_DPI_ENGINE>,
                 <&apmixedsys CLK_APMIXED_TVDPLL>;
        clock-names = "pixel", "engine", "pll";
+       pinctrl-names = "default", "sleep";
+       pinctrl-0 = <&dpi_pin_func>;
+       pinctrl-1 = <&dpi_pin_idle>;

        port {
                dpi0_out: endpoint {
--
2.21.0
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