arm64: dts: qcom: trogdor: Add no-hpd to DSI bridge node

We should indicate that we're not using the HPD pin on this device, per
the binding document. Otherwise if code in the future wants to enable
HPD in the bridge when this property is absent we'll be wasting power
powering hpd when we don't use it on trogdor boards. We didn't notice
this before because the kernel driver blindly disables hpd, but that
won't be true for much longer.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Cc: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Cc: Douglas Anderson <dianders@chromium.org>
Fixes: 7ec3e67307f8 ("arm64: dts: qcom: sc7180-trogdor: add initial trogdor and lazor dt")
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/20210324025534.1837405-1-swboyd@chromium.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
index b89e6f78fd20f9a628339f1e2b6c2062e20f5c4d..3ba34f0c9b184b1f4e7d0937f085ad1cae7208f4 100644 (file)
--- a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
@@ -650,6 +650,8 @@ edp_brij_i2c: &i2c2 {
                clocks = <&rpmhcc RPMH_LN_BB_CLK3>;
                clock-names = "refclk";
 
+               no-hpd;
+
                ports {
                        #address-cells = <1>;
                        #size-cells = <0>;