linux-kernel - [PATCH] arm64: dts: qcom: c630: Add no-hpd to DSI bridge node

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Message-Id: <20210324191549.2043808-1-swboyd@chromium.org>
Date:   Wed, 24 Mar 2021 12:15:49 -0700
From:   Stephen Boyd <swboyd@...omium.org>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
        Douglas Anderson <dianders@...omium.org>
Subject: [PATCH] arm64: dts: qcom: c630: 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. Presumably this board isn't using hpd
on the bridge.

Cc: Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>
Cc: Douglas Anderson <dianders@...omium.org>
Fixes: 7ec3e67307f8 ("arm64: dts: qcom: sc7180-trogdor: add initial trogdor and lazor dt")
Signed-off-by: Stephen Boyd <swboyd@...omium.org>
---
 arch/arm64/boot/dts/qcom/sdm850-lenovo-yoga-c630.dts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sdm850-lenovo-yoga-c630.dts b/arch/arm64/boot/dts/qcom/sdm850-lenovo-yoga-c630.dts
index 140db2d5ba31..c2a709a384e9 100644
--- a/arch/arm64/boot/dts/qcom/sdm850-lenovo-yoga-c630.dts
+++ b/arch/arm64/boot/dts/qcom/sdm850-lenovo-yoga-c630.dts
@@ -376,6 +376,8 @@ sn65dsi86: bridge@2c {
 		clocks = <&sn65dsi86_refclk>;
 		clock-names = "refclk";
 
+		no-hpd;
+
 		ports {
 			#address-cells = <1>;
 			#size-cells = <0>;

base-commit: a38fd8748464831584a19438cbb3082b5a2dab15
-- 
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