6.15-stable review patch. If anyone has any objections, please let me know.
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From: Luca Weiss luca.weiss@fairphone.com
[ Upstream commit 75eefd474469abf95aa9ef6da8161d69f86b98b4 ]
When num-channels and qcom,num-ees is not provided in devicetree, the driver will try to read these values from the registers during probe but this fails if the interconnect is not on and then crashes the system.
So we can provide these properties in devicetree (queried after patching BAM driver to enable the necessary interconnect) so we can probe cryptobam without reading registers and then also use the QCE as expected.
Fixes: 4d29db204361 ("arm64: dts: qcom: sm8350: fix BAM DMA crash and reboot") Fixes: f1040a7fe8f0 ("arm64: dts: qcom: sm8350: Add Crypto Engine support") Signed-off-by: Luca Weiss luca.weiss@fairphone.com Signed-off-by: Stephan Gerhold stephan.gerhold@linaro.org Link: https://lore.kernel.org/r/20250212-bam-dma-fixes-v1-1-f560889e65d8@linaro.or... Signed-off-by: Bjorn Andersson andersson@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- arch/arm64/boot/dts/qcom/sm8350.dtsi | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/arch/arm64/boot/dts/qcom/sm8350.dtsi b/arch/arm64/boot/dts/qcom/sm8350.dtsi index f055600d6cfe5..a86d0067634e8 100644 --- a/arch/arm64/boot/dts/qcom/sm8350.dtsi +++ b/arch/arm64/boot/dts/qcom/sm8350.dtsi @@ -1806,11 +1806,11 @@ interrupts = <GIC_SPI 272 IRQ_TYPE_LEVEL_HIGH>; #dma-cells = <1>; qcom,ee = <0>; + qcom,num-ees = <4>; + num-channels = <16>; qcom,controlled-remotely; iommus = <&apps_smmu 0x594 0x0011>, <&apps_smmu 0x596 0x0011>; - /* FIXME: Probing BAM DMA causes some abort and system hang */ - status = "fail"; };
crypto: crypto@1dfa000 { @@ -1822,8 +1822,6 @@ <&apps_smmu 0x596 0x0011>; interconnects = <&aggre2_noc MASTER_CRYPTO 0 &mc_virt SLAVE_EBI1 0>; interconnect-names = "memory"; - /* FIXME: dependency BAM DMA is disabled */ - status = "disabled"; };
ipa: ipa@1e40000 {