linux-kernel - [PATCH] arm64: dts: qcom: sm8350: fix BAM DMA crash and reboot

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Message-Id: <20230621143627.189134-1-krzysztof.kozlowski@linaro.org>
Date:   Wed, 21 Jun 2023 16:36:27 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Bhupesh Sharma <bhupesh.sharma@...aro.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Subject: [PATCH] arm64: dts: qcom: sm8350: fix BAM DMA crash and reboot

SM8350 HDK and MTP boards were silently dying and rebooting during BAM
DMA probe:

  [    1.574304] vreg_bob: Setting 3008000-3960000uV
  [    1.576918] bam-dFormat: Log Type - Time(microsec) - Message -
  Optional Info
  Log Type: B - Since Boot(Power On Reset),  D - Delta,  S - Statistic
  S - QC_IMAGE_VERSION_STRING=BOOT.MXF.1.0-00637.1-LAHAINA-1
  S - IMAGE_VARIANT_STRING=SocLahainaLAA
  S - OEM_IMAGE_VERSION_STRING=crm-ubuntu77
  S - Boot Interface: UFS

It seems that BAM DMA is locally controller (not by firmware) and
requires proper initialization by the driver prior to use, at least on
HDK8350 and MTP8350, but probably on all boards.

Fixes: f1040a7fe8f0 ("arm64: dts: qcom: sm8350: Add Crypto Engine support")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>

---

Cc: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
---
 arch/arm64/boot/dts/qcom/sm8350.dtsi | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/sm8350.dtsi b/arch/arm64/boot/dts/qcom/sm8350.dtsi
index 88ef478cb5cc..b382ce66387e 100644
--- a/arch/arm64/boot/dts/qcom/sm8350.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8350.dtsi
@@ -1741,7 +1741,6 @@ cryptobam: dma-controller@...4000 {
 			interrupts = <GIC_SPI 272 IRQ_TYPE_LEVEL_HIGH>;
 			#dma-cells = <1>;
 			qcom,ee = <0>;
-			qcom,controlled-remotely;
 			iommus = <&apps_smmu 0x594 0x0011>,
 				 <&apps_smmu 0x596 0x0011>;
 		};
-- 
2.34.1