Stephan Gerhold Date: Thu, 21 Aug 2025 10:15:09 +0200 Subject: [PATCH] arm64: dts: qcom: sdm845: Fix slimbam num-channels/ees Reading the hardware registers of the &slimbam on RB3 reveals that the BAM supports only 23 pipes (channels) and supports 4 EEs instead of 2. This hasn't caused problems so far since nothing is using the extra channels, but attempting to use them would lead to crashes. The bam_dma driver might warn in the future if the num-channels in the DT are wrong, so correct the properties in the DT to avoid future regressions. Cc: stable@vger.kernel.org Fixes: 27ca1de07dc3 ("arm64: dts: qcom: sdm845: add slimbus nodes") Signed-off-by: Stephan Gerhold Reviewed-by: Dmitry Baryshkov Link: https://lore.kernel.org/r/20250821-sdm845-slimbam-channels-v1-1-498f7d46b9ee@linaro.org Signed-off-by: Bjorn Andersson diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi index 828b55cb6baf..02536114edb8 100644 --- a/arch/arm64/boot/dts/qcom/sdm845.dtsi +++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi @@ -5396,11 +5396,11 @@ slimbam: dma-controller@17184000 { compatible = "qcom,bam-v1.7.4", "qcom,bam-v1.7.0"; qcom,controlled-remotely; reg = <0 0x17184000 0 0x2a000>; - num-channels = <31>; + num-channels = <23>; interrupts = ; #dma-cells = <1>; qcom,ee = <1>; - qcom,num-ees = <2>; + qcom,num-ees = <4>; iommus = <&apps_smmu 0x1806 0x0>; }; FAILED: patch "[PATCH] arm64: dts: qcom: sdm845: Fix slimbam num-channels/ees" failed to apply to 5.10-stable tree undefinedstephan.gerhold@linaro.org,andersson@kernel.org,dmitry.baryshkov@oss.qualcomm.com undefined undefined undefined undefined•-ƒŸ1