Re: [PATCH] arm64: dts: qcom: sdm845: Limit ipa iommu streams

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On 11/22/20 11:23 PM, Bjorn Andersson wrote:
The Android and Windows firmware does not accept the use of 3 as a mask
to cover the IPA streams. But with 0x721 being related to WiFi and 0x723
being unsed the mapping can be reduced to just cover 0x720 and 0x722,
which is accepted.

Do you want to update sc7180.dtsi too?

I tried your change on my SDM845 machine and observed no
problem.   I tried the comparable change in "sc7180.dtsi"
(using 440 and 442) and that seemed to work as before also.

If you think that's sufficient, you can add:

Tested-by: Alex Elder <elder@xxxxxxxxxx>

Otherwise:

Acked-by: Alex Elder <elder@xxxxxxxxxx>


Fixes: e9e89c45bfeb ("arm64: dts: sdm845: add IPA iommus property")
Signed-off-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>
---
  arch/arm64/boot/dts/qcom/sdm845.dtsi | 3 ++-
  1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
index 0da27b065761..a6147bd54cdf 100644
--- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
@@ -2136,7 +2136,8 @@ ufs_mem_phy_lanes: lanes@1d87400 {
  		ipa: ipa@1e40000 {
  			compatible = "qcom,sdm845-ipa";
- iommus = <&apps_smmu 0x720 0x3>;
+			iommus = <&apps_smmu 0x720 0x0>,
+				 <&apps_smmu 0x722 0x0>;
  			reg = <0 0x1e40000 0 0x7000>,
  			      <0 0x1e47000 0 0x2000>,
  			      <0 0x1e04000 0 0x2c000>;





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