arm64: dts: qcom: sm8550: Fix the msi-map entries

While adding the GIC ITS MSI support, it was found that the msi-map entries
needed to be swapped to receive MSIs from the endpoint.

But later it was identified that the swapping was needed due to a bug in
the Qualcomm PCIe controller driver. And since the bug is now fixed with
commit bf79e33cdd89 ("PCI: qcom: Enable BDF to SID translation properly"),
let's fix the msi-map entries also to reflect the actual mapping in the
hardware.

Fixes: 114990ce3edf ("arm64: dts: qcom: sm8550: Use GIC-ITS for PCIe0 and PCIe1")
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Acked-by: Neil Armstrong <neil.armstrong@linaro.org>
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8550-QRD
Link: https://lore.kernel.org/r/20240318-pci-bdf-sid-fix-v1-2-acca6c5d9cf1@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

diff --git a/arch/arm64/boot/dts/qcom/sm8550.dtsi b/arch/arm64/boot/dts/qcom/sm8550.dtsi
index 3904348075f67945a9e54117a518631541806ad9..3348bc06db488a77e4dd17dff687ffbcfa1cfced 100644 (file)
--- a/arch/arm64/boot/dts/qcom/sm8550.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8550.dtsi
@@ -1755,9 +1755,8 @@
                                        <&gem_noc MASTER_APPSS_PROC 0 &cnoc_main SLAVE_PCIE_0 0>;
                        interconnect-names = "pcie-mem", "cpu-pcie";
 
-                       /* Entries are reversed due to the unusual ITS DeviceID encoding */
-                       msi-map = <0x0 &gic_its 0x1401 0x1>,
-                                 <0x100 &gic_its 0x1400 0x1>;
+                       msi-map = <0x0 &gic_its 0x1400 0x1>,
+                                 <0x100 &gic_its 0x1401 0x1>;
                        iommu-map = <0x0   &apps_smmu 0x1400 0x1>,
                                    <0x100 &apps_smmu 0x1401 0x1>;
 
@@ -1867,9 +1866,8 @@
                                        <&gem_noc MASTER_APPSS_PROC 0 &cnoc_main SLAVE_PCIE_1 0>;
                        interconnect-names = "pcie-mem", "cpu-pcie";
 
-                       /* Entries are reversed due to the unusual ITS DeviceID encoding */
-                       msi-map = <0x0 &gic_its 0x1481 0x1>,
-                                 <0x100 &gic_its 0x1480 0x1>;
+                       msi-map = <0x0 &gic_its 0x1480 0x1>,
+                                 <0x100 &gic_its 0x1481 0x1>;
                        iommu-map = <0x0   &apps_smmu 0x1480 0x1>,
                                    <0x100 &apps_smmu 0x1481 0x1>;