linux-kernel - [PATCH 2/3] arm64: dts: qcom: sm8150: add iommus to qups

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Message-ID: <20210310163024.393578-3-caleb@connolly.tech>
Date:   Wed, 10 Mar 2021 16:31:28 +0000
From:   Caleb Connolly <caleb@...nolly.tech>
To:     caleb@...nolly.tech, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>
Cc:     ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] arm64: dts: qcom: sm8150: add iommus to qups

Hook up the SMMU for doing DMA over i2c. Some peripherals like
touchscreens easily exceed 32-bytes per transfer, causing errors and
lockups without this.

Signed-off-by: Caleb Connolly <caleb@...nolly.tech>
---
Fixes i2c on the OnePlus 7, without this touching the screen with more
than 4 fingers causes the device to lock up and reboot.
---
 arch/arm64/boot/dts/qcom/sm8150.dtsi | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sm8150.dtsi b/arch/arm64/boot/dts/qcom/sm8150.dtsi
index 03e05d98daf2..543417d74216 100644
--- a/arch/arm64/boot/dts/qcom/sm8150.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8150.dtsi
@@ -583,6 +583,7 @@ qupv3_id_0: geniqup@...000 {
 			clock-names = "m-ahb", "s-ahb";
 			clocks = <&gcc GCC_QUPV3_WRAP_0_M_AHB_CLK>,
 				 <&gcc GCC_QUPV3_WRAP_0_S_AHB_CLK>;
+			iommus = <&apps_smmu 0xc3 0x0>;
 			#address-cells = <2>;
 			#size-cells = <2>;
 			ranges;
@@ -595,6 +596,7 @@ qupv3_id_1: geniqup@...000 {
 			clock-names = "m-ahb", "s-ahb";
 			clocks = <&gcc GCC_QUPV3_WRAP_1_M_AHB_CLK>,
 				 <&gcc GCC_QUPV3_WRAP_1_S_AHB_CLK>;
+			iommus = <&apps_smmu 0x603 0x0>;
 			#address-cells = <2>;
 			#size-cells = <2>;
 			ranges;
@@ -617,6 +619,7 @@ qupv3_id_2: geniqup@...000 {
 			clock-names = "m-ahb", "s-ahb";
 			clocks = <&gcc GCC_QUPV3_WRAP_2_M_AHB_CLK>,
 				 <&gcc GCC_QUPV3_WRAP_2_S_AHB_CLK>;
+			iommus = <&apps_smmu 0x7a3 0x0>;
 			#address-cells = <2>;
 			#size-cells = <2>;
 			ranges;
-- 
2.29.2