This patch adds an override mode for kevin devices. The mode increases
both back porches to allow a pixel clock of 26666kHz as opposed to the
'typical' value of 252750kHz. This is needed to avoid interference with
the touch digitizer on these laptops.

Changes in v2:
 - Wrap the timing in display-timings node to match binding (Rob/Thierry)
Changes in v3:
 - Unwrap the timing from display-timings and rename panel-timing (Rob)

Cc: Doug Anderson <[email protected]>
Cc: Eric Anholt <[email protected]>
Cc: Heiko Stuebner <[email protected]>
Cc: Jeffy Chen <[email protected]>
Cc: Rob Herring <[email protected]>
Cc: Stéphane Marchesin <[email protected]>
Cc: Thierry Reding <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Sean Paul <[email protected]>
---
 arch/arm64/boot/dts/rockchip/rk3399-gru-kevin.dts | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-gru-kevin.dts 
b/arch/arm64/boot/dts/rockchip/rk3399-gru-kevin.dts
index 191a6bcb1704..658411ce37ea 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-gru-kevin.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-gru-kevin.dts
@@ -98,6 +98,20 @@
                backlight = <&backlight>;
                power-supply = <&pp3300_disp>;
 
+               panel-timing {
+                       clock-frequency = <266604720>;
+                       hactive = <2400>;
+                       hfront-porch = <48>;
+                       hback-porch = <84>;
+                       hsync-len = <32>;
+                       hsync-active = <0>;
+                       vactive = <1600>;
+                       vfront-porch = <3>;
+                       vback-porch = <120>;
+                       vsync-len = <10>;
+                       vsync-active = <0>;
+               };
+
                ports {
                        panel_in_edp: endpoint {
                                remote-endpoint = <&edp_out_panel>;
-- 
2.16.0.rc1.238.g530d649a79-goog

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