PCIe missing on RK3399

[Heiko Stübner]

Hi Vicente,

Am Mittwoch, 11. Dezember 2024, 13:55:01 CET schrieb Vicente Bergas:
> i've tested the Linux kernel 6.13-rc1 and rc2 and in both cases PCIe
> is not detected on the RK3399 platform (rk3399-gru-kevin), whereas the
> kernel version 6.12.3 works fine.
> 
> 6.13 configuration is based on the same one as 6.12 and there aren't
> any significant PCI-related differences.
> 
> The messages from dmesg on 6.13 don't show any PCI-related errors.
> 
> Does somebody know what is going on?

so I just booted a rk3399-puma-haikou with a pci-nvme-adapter in the
pcie slot. And I get:

[    0.000000] Booting Linux on physical CPU 0x0000000000 [0x410fd034]
[    0.000000] Linux version 6.13.0-rc2-00101-g260ae63734ff-dirty (hstuebner at phil) (aarch64-linux-gnu-gcc (Debian 14.2.0-6) 14.2.0, GNU ld (GNU Binutils for Debian) 2.43.1) #1134 SMP PREEMPT Tue Dec 10 21:06:34 CET 2024
...
[    3.428114] rockchip-pcie f8000000.pcie: host bridge /pcie at f8000000 ranges:
[    3.435978] rockchip-pcie f8000000.pcie:      MEM 0x00fa000000..0x00fbdfffff -> 0x00fa000000
[    3.445478] rockchip-pcie f8000000.pcie:       IO 0x00fbe00000..0x00fbefffff -> 0x00fbe00000
[    3.455298] rockchip-pcie f8000000.pcie: using DT '/pcie at f8000000' for 'ep' GPIO lookup
[    3.455332] of_get_named_gpiod_flags: parsed 'ep-gpios' property of node '/pcie at f8000000[0]' - status (0)
[    3.455359] gpio gpiochip4: Persistence not supported for GPIO 22
[    3.499404] usb 3-1: new high-speed USB device number 2 using xhci-hcd
[    3.664293] rockchip-pcie f8000000.pcie: PCI host bridge to bus 0000:00
[    3.671770] pci_bus 0000:00: root bus resource [bus 00-1f]
[    3.677936] pci_bus 0000:00: root bus resource [mem 0xfa000000-0xfbdfffff]
[    3.685680] pci_bus 0000:00: root bus resource [io  0x0000-0xfffff] (bus address [0xfbe00000-0xfbefffff])
[    3.696474] pci 0000:00:00.0: [1d87:0100] type 01 class 0x060400 PCIe Root Port
[    3.704852] hub 3-1:1.0: USB hub found
[    3.709114] pci 0000:00:00.0: PCI bridge to [bus 00]
[    3.714682] hub 3-1:1.0: 4 ports detected
[    3.719334] pci 0000:00:00.0:   bridge window [mem 0x00000000-0x000fffff]
[    3.727028] pci 0000:00:00.0: supports D1
[    3.731523] pci 0000:00:00.0: PME# supported from D0 D1 D3hot
[    3.739745] pci 0000:00:00.0: bridge configuration invalid ([bus 00-00]), reconfiguring
[    3.748858] pci 0000:01:00.0: [144d:a804] type 00 class 0x010802 PCIe Endpoint
[    3.757011] pci 0000:01:00.0: BAR 0 [mem 0x00000000-0x00003fff 64bit]
[    3.764358] pci 0000:01:00.0: Max Payload Size set to 256 (was 128, max 256)
[    3.772374] usb 4-1: new SuperSpeed USB device number 2 using xhci-hcd
[    3.780132] pci 0000:01:00.0: 8.000 Gb/s available PCIe bandwidth, limited by 2.5 GT/s PCIe x4 link at 0000:00:00.0 (capable of 31.504 Gb/s with 8.0 GT/s PCIe x4 link)
[    3.803225] pci_bus 0000:01: busn_res: [bus 01-1f] end is updated to 01
[    3.810659] pci 0000:00:00.0: bridge window [mem 0xfa000000-0xfa0fffff]: assigned
[    3.819082] pci 0000:01:00.0: BAR 0 [mem 0xfa000000-0xfa003fff 64bit]: assigned
[    3.827302] pci 0000:00:00.0: PCI bridge to [bus 01]
[    3.832873] pci 0000:00:00.0:   bridge window [mem 0xfa000000-0xfa0fffff]
[    3.844769] pci_bus 0000:00: resource 4 [mem 0xfa000000-0xfbdfffff]
[    3.856277] pci_bus 0000:00: resource 5 [io  0x0000-0xfffff]
[    3.862618] pci_bus 0000:01: resource 1 [mem 0xfa000000-0xfa0fffff]
[    3.869750] pcieport 0000:00:00.0: enabling device (0000 -> 0002)
[    3.876911] pcieport 0000:00:00.0: PME: Signaling with IRQ 85
[    3.884054] nvme nvme0: pci function 0000:01:00.0
[    3.889336] nvme 0000:01:00.0: enabling device (0000 -> 0002)
[    3.915282] nvme nvme0: 6/0/0 default/read/poll queues
[    3.993297]  nvme0n1: p1 p2

So there seems to be not some general failure.

Does
	# ls /sys/devices/platform/f8000000.pcie
list some "waiting_for_supplies" or something?