Tegra186 has three PCIe controllers which can be operated in 401, 211 or 111 lane configurations. Tegra TX2 platform has x4 and M.2 Key E PCIe slots, these patches enables x4 slot. BPMP programs UPHY lane0 ownership to USB, so M.2 Key E PCIe will not work. Testing: x4 slot is verified with PCIe based USB3.1 card. PCIe link up, usb flash drive mounting and file copy are verified. Pasting PCIe link up logs below. [ 1.452512] tegra-pcie 10003000.pcie: 4x1, 1x1 configuration [ 1.452723] tegra-pcie 10003000.pcie: Failed to get supply 'dvdd-pex': -517 [ 1.561824] ehci-pci: EHCI PCI platform driver [ 1.591587] ohci-pci: OHCI PCI platform driver [ 3.072464] tegra-pcie 10003000.pcie: 4x1, 1x1 configuration [ 3.078989] tegra-pcie 10003000.pcie: probing port 0, using 4 lanes [ 3.087272] tegra-pcie 10003000.pcie: Slot present pin change, signature: 00000018 [ 3.128818] tegra-pcie 10003000.pcie: PCI host bridge to bus 0000:00 [ 3.135174] pci_bus 0000:00: root bus resource [io 0x0000-0xffff] [ 3.141352] pci_bus 0000:00: root bus resource [mem 0x50100000-0x57ffffff] [ 3.148221] pci_bus 0000:00: root bus resource [mem 0x58000000-0x7fffffff pref] [ 3.155542] pci_bus 0000:00: root bus resource [bus 00-ff] [ 3.161173] pci 0000:00:01.0: [10de:10e5] type 01 class 0x060400 [ 3.161188] pci_bus 0000:00: 2-byte config write to 0000:00:01.0 offset 0x4 may corrupt adjacent RW1C bits [ 3.170838] pci_bus 0000:00: 2-byte config write to 0000:00:01.0 offset 0x4 may corrupt adjacent RW1C bits [ 3.180532] pci_bus 0000:00: 2-byte config write to 0000:00:01.0 offset 0x52 may corrupt adjacent RW1C bits [ 3.190305] pci 0000:00:01.0: PME# supported from D0 D1 D2 D3hot D3cold [ 3.190312] pci_bus 0000:00: 2-byte config write to 0000:00:01.0 offset 0x4c may corrupt adjacent RW1C bits [ 3.200158] pci 0000:00:01.0: bridge configuration invalid ([bus 00-00]), reconfiguring [ 3.208158] pci_bus 0000:00: 2-byte config write to 0000:00:01.0 offset 0x3e may corrupt adjacent RW1C bits [ 3.217918] pci_bus 0000:00: 2-byte config write to 0000:00:01.0 offset 0x3e may corrupt adjacent RW1C bits [ 3.227649] pci_bus 0000:00: 2-byte config write to 0000:00:01.0 offset 0x3e may corrupt adjacent RW1C bits [ 3.237382] pci_bus 0000:00: 2-byte config write to 0000:00:01.0 offset 0x6 may corrupt adjacent RW1C bits [ 3.247135] pci 0000:01:00.0: [1b21:1242] type 00 class 0x0c0330 [ 3.247157] pci_bus 0000:01: 2-byte config write to 0000:01:00.0 offset 0x4 may corrupt adjacent RW1C bits [ 3.256807] pci_bus 0000:01: 2-byte config write to 0000:01:00.0 offset 0x4 may corrupt adjacent RW1C bits [ 3.266477] pci 0000:01:00.0: reg 0x10: [mem 0x00000000-0x00007fff 64bit] [ 3.266544] pci 0000:01:00.0: enabling Extended Tags [ 3.271622] pci 0000:01:00.0: PME# supported from D3hot D3cold [ 3.271775] pci_bus 0000:01: busn_res: [bus 01-ff] end is updated to 01 [ 3.271798] pci 0000:00:01.0: BAR 14: assigned [mem 0x50100000-0x501fffff] [ 3.278671] pci 0000:01:00.0: BAR 0: assigned [mem 0x50100000-0x50107fff 64bit] [ 3.285993] pci 0000:00:01.0: PCI bridge to [bus 01] [ 3.290959] pci 0000:00:01.0: bridge window [mem 0x50100000-0x501fffff] [ 3.297763] pci 0000:00:01.0: nv_msi_ht_cap_quirk didn't locate host bridge [ 3.304784] pcieport 0000:00:01.0: enabling device (0000 -> 0002) [ 3.311014] pcieport 0000:00:01.0: Signaling PME with IRQ 57 [ 3.316768] pci 0000:01:00.0: enabling device (0000 -> 0002) Manikanta Maddireddy (4): dt-bindings: pci: tegra: Document Tegra186 PCIe DT PCI: tegra: Add Tegra186 PCIe support arm64: tegra: Add PCIe node for Tegra186 arm64: tegra: Enable PCIe on Jetson TX2 .../bindings/pci/nvidia,tegra20-pcie.txt | 134 ++++++++++++++++++++- arch/arm64/boot/dts/nvidia/tegra186-p3310.dtsi | 24 ++++ arch/arm64/boot/dts/nvidia/tegra186.dtsi | 82 +++++++++++++ drivers/pci/host/pci-tegra.c | 123 +++++++++++++++---- 4 files changed, 338 insertions(+), 25 deletions(-) -- 2.1.4
