I want to use a PCIe switch on a RK3399 based RockPro64 V2.1 board. "Normal" PCIe cards work (mostly) just fine on this board. The PCIe switches (I tried Pericom and ASMedia based switches) also work fine on other boards. The RK3399 PCIe controller with pcie_rockchip_host driver also recognises the switch, but fails to initialize the buses behind the bridge properly, see syslog from linux-5.6.0. Any ideas what I do wrong, or any suggestions what I can test here? Thanks, Soeren Apr 4 19:50:38 rockpro64 kernel: [ 74.501951] rockchip-pcie f8000000.pcie: f8000000.pcie supply vpcie1v8 not found, using dummy regulator Apr 4 19:50:38 rockpro64 kernel: [ 74.502906] rockchip-pcie f8000000.pcie: f8000000.pcie supply vpcie0v9 not found, using dummy regulator Apr 4 19:50:38 rockpro64 kernel: [ 74.572050] rockchip-pcie f8000000.pcie: host bridge /pcie@f8000000 ranges: Apr 4 19:50:38 rockpro64 kernel: [ 74.573018] rockchip-pcie f8000000.pcie: Parsing ranges property... Apr 4 19:50:38 rockpro64 kernel: [ 74.573040] rockchip-pcie f8000000.pcie: MEM 0x00fa000000..0x00fbdfffff -> 0x00fa000000 Apr 4 19:50:38 rockpro64 kernel: [ 74.574080] rockchip-pcie f8000000.pcie: IO 0x00fbe00000..0x00fbefffff -> 0x00fbe00000 Apr 4 19:50:38 rockpro64 kernel: [ 74.575420] rockchip-pcie f8000000.pcie: PCI host bridge to bus 0000:00 Apr 4 19:50:38 rockpro64 kernel: [ 74.576247] pci_bus 0000:00: root bus resource [bus 00-1f] Apr 4 19:50:38 rockpro64 kernel: [ 74.576930] pci_bus 0000:00: root bus resource [mem 0xfa000000-0xfbdfffff] Apr 4 19:50:38 rockpro64 kernel: [ 74.577739] pci_bus 0000:00: root bus resource [io 0x0000-0xfffff] (bus address [0xfbe00000-0xfbefffff]) Apr 4 19:50:38 rockpro64 kernel: [ 74.578876] pci_bus 0000:00: scanning bus Apr 4 19:50:38 rockpro64 kernel: [ 74.578918] pci 0000:00:00.0: [1d87:0100] type 01 class 0x060400 Apr 4 19:50:38 rockpro64 kernel: [ 74.579734] pci 0000:00:00.0: supports D1 Apr 4 19:50:38 rockpro64 kernel: [ 74.580252] pci 0000:00:00.0: PME# supported from D0 D1 D3hot Apr 4 19:50:38 rockpro64 kernel: [ 74.580952] pci 0000:00:00.0: PME# disabled Apr 4 19:50:38 rockpro64 kernel: [ 74.585475] pci_bus 0000:00: fixups for bus Apr 4 19:50:38 rockpro64 kernel: [ 74.585491] pci 0000:00:00.0: scanning [bus 00-00] behind bridge, pass 0 Apr 4 19:50:38 rockpro64 kernel: [ 74.585497] pci 0000:00:00.0: bridge configuration invalid ([bus 00-00]), reconfiguring Apr 4 19:50:38 rockpro64 kernel: [ 74.586562] pci 0000:00:00.0: scanning [bus 00-00] behind bridge, pass 1 Apr 4 19:50:38 rockpro64 kernel: [ 74.586725] pci_bus 0000:01: scanning bus Apr 4 19:50:38 rockpro64 kernel: [ 74.586792] pci 0000:01:00.0: [1b21:1182] type 01 class 0x060400 Apr 4 19:50:38 rockpro64 kernel: [ 74.587785] pci 0000:01:00.0: Max Payload Size set to 256 (was 128, max 256) Apr 4 19:50:38 rockpro64 kernel: [ 74.588625] pci 0000:01:00.0: enabling Extended Tags Apr 4 19:50:38 rockpro64 kernel: [ 74.589487] pci 0000:01:00.0: PME# supported from D0 D3hot D3cold Apr 4 19:50:38 rockpro64 kernel: [ 74.590199] pci 0000:01:00.0: PME# disabled Apr 4 19:50:38 rockpro64 kernel: [ 74.590344] pci 0000:01:00.0: 2.000 Gb/s available PCIe bandwidth, limited by 2.5 GT/s x1 link at 0000:00:00.0 (capable of 4.000 Gb/s with 5 GT/s x1 link) Apr 4 19:50:38 rockpro64 kernel: [ 74.598206] pci_bus 0000:01: fixups for bus Apr 4 19:50:38 rockpro64 kernel: [ 74.598226] pci 0000:01:00.0: scanning [bus 00-00] behind bridge, pass 0 Apr 4 19:50:38 rockpro64 kernel: [ 74.598231] pci 0000:01:00.0: bridge configuration invalid ([bus 00-00]), reconfiguring Apr 4 19:50:38 rockpro64 kernel: [ 74.599163] pci 0000:01:00.0: scanning [bus 00-00] behind bridge, pass 1 Apr 4 19:50:38 rockpro64 kernel: [ 74.599443] pci_bus 0000:02: scanning bus Apr 4 19:50:38 rockpro64 kernel: [ 74.599460] Internal error: synchronous external abort: 96000210 [#1] PREEMPT SMP Apr 4 19:50:38 rockpro64 kernel: [ 74.600271] Modules linked in: pcie_rockchip_host(+) brcmfmac brcmutil Apr 4 19:50:38 rockpro64 kernel: [ 74.600978] CPU: 3 PID: 565 Comm: modprobe Not tainted 5.6.0 #1 Apr 4 19:50:38 rockpro64 kernel: [ 74.601607] Hardware name: Pine64 RockPro64 v2.1 (DT) Apr 4 19:50:38 rockpro64 kernel: [ 74.602147] pstate: 60000085 (nZCv daIf -PAN -UAO) Apr 4 19:50:38 rockpro64 kernel: [ 74.602666] pc : rockchip_pcie_rd_conf+0x120/0x228 [pcie_rockchip_host] Apr 4 19:50:38 rockpro64 kernel: [ 74.603373] lr : rockchip_pcie_rd_conf+0x94/0x228 [pcie_rockchip_host] Apr 4 19:50:38 rockpro64 kernel: [ 74.604064] sp : ffffffc011003500 Apr 4 19:50:38 rockpro64 kernel: [ 74.604419] x29: ffffffc011003500 x28: 0000000000000000 Apr 4 19:50:38 rockpro64 kernel: [ 74.604986] x27: 0000000000000001 x26: 0000000000000000 Apr 4 19:50:38 rockpro64 kernel: [ 74.605552] x25: 0000000000000000 x24: ffffffc011003644 Apr 4 19:50:38 rockpro64 kernel: [ 74.606117] x23: ffffff80f1792000 x22: ffffffc011003584 Apr 4 19:50:38 rockpro64 kernel: [ 74.606683] x21: ffffff80e98313c0 x20: 0000000000000004 Apr 4 19:50:38 rockpro64 kernel: [ 74.607249] x19: ffffffc012200000 x18: 00000000fffffff0 Apr 4 19:50:38 rockpro64 kernel: [ 74.607815] x17: 0000000000000000 x16: 0000000000000000 Apr 4 19:50:38 rockpro64 kernel: [ 74.608381] x15: ffffffc010b77c00 x14: ffffffc010be2e28 Apr 4 19:50:38 rockpro64 kernel: [ 74.608947] x13: 0000000000000000 x12: ffffffc010be2000 Apr 4 19:50:38 rockpro64 kernel: [ 74.609512] x11: ffffffc010b77000 x10: ffffffc010be2470 Apr 4 19:50:38 rockpro64 kernel: [ 74.610079] x9 : 0000000011821b21 x8 : 0000000000000001 Apr 4 19:50:38 rockpro64 kernel: [ 74.615455] x7 : 0000000000000000 x6 : 0000000000000000 Apr 4 19:50:38 rockpro64 kernel: [ 74.621487] x5 : 0000000000200000 x4 : 0000000000000000 Apr 4 19:50:38 rockpro64 kernel: [ 74.627519] x3 : 0000000000c00008 x2 : 000000000080000b Apr 4 19:50:38 rockpro64 kernel: [ 74.633551] x1 : ffffffc015c00008 x0 : ffffffc012000000 Apr 4 19:50:38 rockpro64 kernel: [ 74.639583] Call trace: Apr 4 19:50:38 rockpro64 kernel: [ 74.645785] rockchip_pcie_rd_conf+0x120/0x228 [pcie_rockchip_host] Apr 4 19:50:38 rockpro64 kernel: [ 74.656354] pci_bus_read_config_dword+0x80/0xd0 Apr 4 19:50:38 rockpro64 kernel: [ 74.665083] pci_bus_generic_read_dev_vendor_id+0x30/0x1a8 Apr 4 19:50:38 rockpro64 kernel: [ 74.674722] pci_bus_read_dev_vendor_id+0x48/0x68 Apr 4 19:50:38 rockpro64 kernel: [ 74.683382] pci_scan_single_device+0x7c/0xd8 Apr 4 19:50:38 rockpro64 kernel: [ 74.691690] pci_scan_slot+0x34/0x118 Apr 4 19:50:38 rockpro64 kernel: [ 74.699155] pci_scan_child_bus_extend+0x60/0x2cc Apr 4 19:50:38 rockpro64 kernel: [ 74.707774] pci_scan_bridge_extend+0x340/0x578 Apr 4 19:50:38 rockpro64 kernel: [ 74.716224] pci_scan_child_bus_extend+0x20c/0x2cc Apr 4 19:50:38 rockpro64 kernel: [ 74.724943] pci_scan_bridge_extend+0x340/0x578 Apr 4 19:50:38 rockpro64 kernel: [ 74.733320] pci_scan_child_bus_extend+0x20c/0x2cc Apr 4 19:50:38 rockpro64 kernel: [ 74.741998] pci_scan_child_bus+0x10/0x18 Apr 4 19:50:38 rockpro64 kernel: [ 74.749739] pci_scan_root_bus_bridge+0x78/0xd0 Apr 4 19:50:38 rockpro64 kernel: [ 74.757988] rockchip_pcie_probe+0x830/0xb90 [pcie_rockchip_host] Apr 4 19:50:38 rockpro64 kernel: [ 74.768042] platform_drv_probe+0x50/0xa0 Apr 4 19:50:38 rockpro64 kernel: [ 74.775758] really_probe+0xd8/0x300 Apr 4 19:50:38 rockpro64 kernel: [ 74.782939] driver_probe_device+0x54/0xe8 Apr 4 19:50:38 rockpro64 kernel: [ 74.790661] device_driver_attach+0x6c/0x78 Apr 4 19:50:38 rockpro64 kernel: [ 74.798461] __driver_attach+0x54/0xd0 Apr 4 19:50:38 rockpro64 kernel: [ 74.805744] bus_for_each_dev+0x70/0xc0 Apr 4 19:50:38 rockpro64 kernel: [ 74.813119] driver_attach+0x20/0x28 Apr 4 19:50:38 rockpro64 kernel: [ 74.820101] bus_add_driver+0x178/0x1d8 Apr 4 19:50:38 rockpro64 kernel: [ 74.827249] driver_register+0x60/0x110 Apr 4 19:50:38 rockpro64 kernel: [ 74.834308] __platform_driver_register+0x44/0x50 Apr 4 19:50:38 rockpro64 kernel: [ 74.842299] rockchip_pcie_driver_init+0x20/0x1000 [pcie_rockchip_host] Apr 4 19:50:38 rockpro64 kernel: [ 74.852443] do_one_initcall+0x74/0x1a8 Apr 4 19:50:38 rockpro64 kernel: [ 74.859430] do_init_module+0x50/0x1f0 Apr 4 19:50:38 rockpro64 kernel: [ 74.866276] load_module+0x1c0c/0x2158 Apr 4 19:50:38 rockpro64 kernel: [ 74.873100] __do_sys_finit_module+0xd0/0xe8 Apr 4 19:50:38 rockpro64 kernel: [ 74.880480] __arm64_sys_finit_module+0x1c/0x28 Apr 4 19:50:38 rockpro64 kernel: [ 74.888157] el0_svc_common.constprop.1+0x7c/0xe8 Apr 4 19:50:38 rockpro64 kernel: [ 74.896000] do_el0_svc+0x18/0x20 Apr 4 19:50:38 rockpro64 kernel: [ 74.902285] el0_sync_handler+0x12c/0x1b0 Apr 4 19:50:38 rockpro64 kernel: [ 74.909380] el0_sync+0x114/0x140 Apr 4 19:50:38 rockpro64 kernel: [ 74.915692] Code: a8c37bfd d65f03c0 f94002a0 8b130013 (b9400273) Apr 4 19:50:38 rockpro64 kernel: [ 74.925210] ---[ end trace 181d7993f92f3f3d ]---
