From: Stephen Boyd <swboyd@chromium.org>
Date: Wed, 24 Mar 2021 02:55:34 +0000 (-0700)
Subject: arm64: dts: qcom: trogdor: Add no-hpd to DSI bridge node
X-Git-Tag: v5.12.19~44
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7df6ccab5c78cf7ce92ed824a6532a3eff758195;p=thirdparty%2Fkernel%2Fstable.git

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

[ Upstream commit 5f551b5ce55575b14c26933fe9b49365ea246b3d ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
index b8f7cf5cbdab1..96914a307ba1d 100644
--- a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
@@ -597,6 +597,8 @@ edp_brij_i2c: &i2c2 {
 		clocks = <&rpmhcc RPMH_LN_BB_CLK3>;
 		clock-names = "refclk";
 
+		no-hpd;
+
 		ports {
 			#address-cells = <1>;
 			#size-cells = <0>;