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From:   Philip Chen <philipchen@chromium.org>
To:     LKML <linux-kernel@vger.kernel.org>
Cc:     swboyd@chromium.org, dianders@chromium.org,
        Philip Chen <philipchen@chromium.org>,
        Andy Gross <agross@kernel.org>,
        Bjorn Andersson <bjorn.andersson@linaro.org>,
        Rob Herring <robh+dt@kernel.org>, devicetree@vger.kernel.org,
        linux-arm-msm@vger.kernel.org
Subject: [PATCH v3 2/4] arm64: dts: sc7180: Specify "data-lanes" for DSI host output
Date:   Fri, 29 Oct 2021 15:27:41 -0700
Message-Id: <20211029152647.v3.2.If23c83a786fc4d318a1986f43803f22b4b1d82cd@changeid>
In-Reply-To: <20211029152647.v3.1.Ie17e51ad3eb91d72826ce651ca2786534a360210@changeid>
References: <20211029152647.v3.1.Ie17e51ad3eb91d72826ce651ca2786534a360210@changeid>
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MSM DSI host driver actually parses "data-lanes" in DT and compare
it with the number of DSI lanes the bridge driver sets for
mipi_dsi_device. So we need to always specify "data-lanes" for the
DSI host output. As of now, "data-lanes" is added to ti-sn65dsi86 dts
fragment, but missing in parade-ps8640 dts fragment, which requires
a fixup.

Since we'll do 4-lane DSI regardless of which bridge chip is used,
instead of adding "data-lanes" to parade-ps8640 dts fragment, let's
just move "data-lanes" from the bridge dts to sc7180-trogdor.dtsi.

Signed-off-by: Philip Chen <philipchen@chromium.org>
---

(no changes since v1)

 arch/arm64/boot/dts/qcom/sc7180-trogdor-ti-sn65dsi86.dtsi | 1 -
 arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi              | 4 ++++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor-ti-sn65dsi86.dtsi b/arch/arm64/boot/dts/qcom/sc7180-trogdor-ti-sn65dsi86.dtsi
index 6dbf413e4e5b..f869e6a343c1 100644
--- a/arch/arm64/boot/dts/qcom/sc7180-trogdor-ti-sn65dsi86.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor-ti-sn65dsi86.dtsi
@@ -9,7 +9,6 @@
 
 &dsi0_out {
 	remote-endpoint = <&sn65dsi86_in>;
-	data-lanes = <0 1 2 3>;
 };
 
 edp_brij_i2c: &i2c2 {
diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
index d4f4441179fc..bd5909ffb3dc 100644
--- a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
@@ -603,6 +603,10 @@ &dsi0 {
 	vdda-supply = <&vdda_mipi_dsi0_1p2>;
 };
 
+&dsi0_out {
+	data-lanes = <0 1 2 3>;
+};
+
 &dsi_phy {
 	status = "okay";
 	vdds-supply = <&vdda_mipi_dsi0_pll>;
-- 
2.33.1.1089.g2158813163f-goog