diff mbox series

arm64: dts: qcom: sdm850-lenovo-yoga-c630: make SMMU non-DMA-coherent

Message ID 20250215-yoga-dma-coherent-v1-1-2419ee184a81@linaro.org (mailing list archive)
State New
Headers show
Series arm64: dts: qcom: sdm850-lenovo-yoga-c630: make SMMU non-DMA-coherent | expand

Commit Message

Dmitry Baryshkov Feb. 15, 2025, 2:43 a.m. UTC 
The commit 6b31a9744b87 ("arm64: dts: qcom: sdm845: Affirm IDR0.CCTW on
apps_smmu") enabled dma-coherent property for the IOMMU device. This
works for some devices, like Qualcomm RB3 platform, but at the same time
it breaks booting on Lenovo Yoga C630 (most likely because of some TZ
differences). Disable DMA coherency for IOMMU on Lenove Yoga C630.

Fixes: 6b31a9744b87 ("arm64: dts: qcom: sdm845: Affirm IDR0.CCTW on apps_smmu")
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 arch/arm64/boot/dts/qcom/sdm850-lenovo-yoga-c630.dts | 4 ++++
 1 file changed, 4 insertions(+)


---
base-commit: ed58d103e6da15a442ff87567898768dc3a66987
change-id: 20250215-yoga-dma-coherent-ea255630fd7d

Best regards,
diff mbox series

Patch

diff --git a/arch/arm64/boot/dts/qcom/sdm850-lenovo-yoga-c630.dts b/arch/arm64/boot/dts/qcom/sdm850-lenovo-yoga-c630.dts
index f18050848cd8892666015c8182971ff0567747b7..67a60ec33e8cf701a672696e7c7bd85120950441 100644
--- a/arch/arm64/boot/dts/qcom/sdm850-lenovo-yoga-c630.dts
+++ b/arch/arm64/boot/dts/qcom/sdm850-lenovo-yoga-c630.dts
@@ -342,6 +342,10 @@  vreg_lvs2a_1p8: lvs2 {
 	};
 };
 
+&apps_smmu {
+	/delete-property/ dma-coherent;
+};
+
 &cdsp_pas {
 	firmware-name = "qcom/sdm850/LENOVO/81JL/qccdsp850.mbn";
 	status = "okay";