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....@mediatek.com>
---
 .../devicetree/bindings/display/mediatek/mediatek,dpi.txt       | 2 ++
 1 file changed, 2 insertions(+)

diff --git 
a/Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.txt 
b/Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.txt
index a7b1b8bfb65e..4299aa1adf45 100644
--- a/Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.txt
+++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.txt
@@ -20,6 +20,7 @@ Required properties:
 Optional properties:
 - pinctrl-names: Contain "gpiomode" and "dpimode".
   pinctrl-names see 
Documentation/devicetree/bindings/pinctrlpinctrl-bindings.txt
+- pclk-sample: refer 
Documentation/devicetree/bindings/media/video-interfaces.txt.
 
 Example:
 
@@ -37,6 +38,7 @@ dpi0: dpi@1401d000 {
 
        port {
                dpi0_out: endpoint {
+                       pclk-sample = 0;
                        remote-endpoint = <&hdmi0_in>;
                };
        };
-- 
2.21.0
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