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| author | Greg Ociepka <greg@ferrisoft.com> | 2026-08-12 17:40:14 +0200 |
|---|---|---|
| committer | Bjorn Andersson <andersson@kernel.org> | 2026-09-17 22:15:16 -0500 |
| commit | e62df36f34949aebe016c5c81e34baa7a9eca427 (patch) | |
| tree | cf3184c6ee2b91955ed2abaf9126dcacf9d1c674 | |
| parent | a501c39e16105cdbd1fb6abe29d955b378306ed8 (diff) | |
| download | linux-next-e62df36f34949aebe016c5c81e34baa7a9eca427.tar.gz linux-next-e62df36f34949aebe016c5c81e34baa7a9eca427.zip | |
arm64: dts: qcom: glymur: Mark USB controllers dma-coherent
All five USB controller nodes on Glymur (usb_0, usb_1, usb_2, usb_hs,
usb_mp) are missing the dma-coherent property, which Hamoa carries on
all of its USB controllers. Krishna Kurapati confirmed the Glymur USB
controllers are dma-coherent [1].
Without the property the kernel treats USB DMA buffers as non-coherent
and performs cache maintenance on every transfer, which coherent
hardware makes redundant.
Tested on an Asus Zenbook A16 (UX3607OA): all controllers enumerate
their devices as before and a 64 MiB write plus two O_DIRECT
read-backs over USB mass storage produce identical checksums.
[1] https://lore.kernel.org/linux-arm-msm/f92cc91e-6e5c-4375-aaa6-f079a165f4b5@oss.qualcomm.com/
Fixes: 4eee57dd4df9 ("arm64: dts: qcom: glymur: Add USB related nodes")
Signed-off-by: Greg Ociepka <greg@ferrisoft.com>
Assisted-by: Claude:fable-5
Reviewed-by: Abel Vesa <abel.vesa@oss.qualcomm.com>
Reviewed-by: Gopikrishna Garmidi <gopikrishna.garmidi@oss.qualcomm.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260812154014.123315-1-greg@ferrisoft.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
| -rw-r--r-- | arch/arm64/boot/dts/qcom/glymur.dtsi | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/arm64/boot/dts/qcom/glymur.dtsi b/arch/arm64/boot/dts/qcom/glymur.dtsi index 7dedace8c3c4..de7c395d9c35 100644 --- a/arch/arm64/boot/dts/qcom/glymur.dtsi +++ b/arch/arm64/boot/dts/qcom/glymur.dtsi @@ -4949,6 +4949,8 @@ usb-role-switch; wakeup-source; + dma-coherent; + status = "disabled"; ports { @@ -5037,6 +5039,8 @@ usb-role-switch; wakeup-source; + dma-coherent; + status = "disabled"; ports { @@ -5125,6 +5129,8 @@ usb-role-switch; wakeup-source; + dma-coherent; + status = "disabled"; ports { @@ -5215,6 +5221,8 @@ usb-role-switch; wakeup-source; + dma-coherent; + status = "disabled"; }; @@ -5299,6 +5307,8 @@ dr_mode = "host"; wakeup-source; + dma-coherent; + status = "disabled"; }; |