Re: [PATCH V2 0/4] Add Tegra186 PCIe support

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On Wed, Sep 27, 2017 at 05:28:33PM +0530, Manikanta Maddireddy wrote:
> 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. These patches are also verified by
> Mikko Perttunen <mperttunen@xxxxxxxxxx> with an Intel 82574L
> ethernet card.
> 
> Patch V2 adds soc->program_uphy check for phy_exit call.
> 
> 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

I applied these two with Thierry's tested-by and acks to
pci/host-tegra for v4.15, thanks!  If you have a changelog update for
the pm_domain question, I can fold that in.

>   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                       | 132 ++++++++++++++++----
>  4 files changed, 344 insertions(+), 28 deletions(-)
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