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Date: Fri, 5 Aug 2022 17:21:14 +0300 From: Mika Westerberg <mika.westerberg@...ux.intel.com> To: Brad Campbell <lists2009@...rfbargle.com> Cc: linux-kernel@...r.kernel.org Subject: Re: Apple Thunderbolt Display chaining On Fri, Aug 05, 2022 at 10:13:53PM +0800, Brad Campbell wrote: > On 5/8/22 21:01, Mika Westerberg wrote: > > On Fri, Aug 05, 2022 at 08:43:08PM +0800, Brad Campbell wrote: > > > > Well can you try so that you disable PCIe PM for starters? Pass > > > > "pcie_port_pm=off" in the command line and see if anything changes. Of > > > > course this prevents low power states. > > > > > > > > > > That allows me to modprobe thunderbolt from an xterm : > > > > Okay does it work any better if you don't have anything attached to the > > TBT ports when you boot up? If it does, how about just adding a single > > device (no display connected)? > > > > Yes, with nothing attached to the Tb ports it's fine. Been working that way for months. > > With a non-display TB device it appears to work ok also. > > The only device I have that will work on an Apple TB1<->TB2 adapter without external power is > an Apple TB1->GBe dongle. But that sets up, works and does repeated warn boots. The BIOS even detects > the network port once Linux has set it up the first time. > > Again, module manually loaded after warm boot : > > [ 76.239198] ACPI: bus type thunderbolt registered > [ 76.239225] thunderbolt 0000:05:00.0: enabling device (0000 -> 0002) > [ 76.239275] thunderbolt 0000:05:00.0: total paths: 12 > [ 76.239278] thunderbolt 0000:05:00.0: IOMMU DMA protection is disabled > [ 76.239409] thunderbolt 0000:05:00.0: allocating TX ring 0 of size 10 > [ 76.239422] thunderbolt 0000:05:00.0: allocating RX ring 0 of size 10 > [ 76.239433] thunderbolt 0000:05:00.0: control channel created > [ 76.239436] thunderbolt 0000:05:00.0: ICM not supported on this controller > [ 76.239442] thunderbolt 0000:05:00.0: freeing RX ring 0 > [ 76.239447] thunderbolt 0000:05:00.0: freeing TX ring 0 > [ 76.239453] thunderbolt 0000:05:00.0: allocating TX ring 0 of size 10 > [ 76.239460] thunderbolt 0000:05:00.0: allocating RX ring 0 of size 10 > [ 76.239466] thunderbolt 0000:05:00.0: control channel created > [ 76.239467] thunderbolt 0000:05:00.0: using software connection manager > [ 76.239467] thunderbolt 0000:05:00.0: NHI initialized, starting thunderbolt > [ 76.239468] thunderbolt 0000:05:00.0: control channel starting... > [ 76.239468] thunderbolt 0000:05:00.0: starting TX ring 0 > [ 76.239475] thunderbolt 0000:05:00.0: enabling interrupt at register 0x38200 bit 0 (0x0 -> 0x1) > [ 76.239477] thunderbolt 0000:05:00.0: starting RX ring 0 > [ 76.239484] thunderbolt 0000:05:00.0: enabling interrupt at register 0x38200 bit 12 (0x1 -> 0x1001) > [ 76.239487] thunderbolt 0000:05:00.0: security level set to user > [ 76.239678] thunderbolt 0000:05:00.0: current switch config: > [ 76.239678] thunderbolt 0000:05:00.0: Thunderbolt 3 Switch: 8086:15ea (Revision: 6, TB Version: 16) > [ 76.239679] thunderbolt 0000:05:00.0: Max Port Number: 13 > [ 76.239680] thunderbolt 0000:05:00.0: Config: > [ 76.239680] thunderbolt 0000:05:00.0: Upstream Port Number: 7 Depth: 0 Route String: 0x0 Enabled: 1, PlugEventsDelay: 255ms > [ 76.239681] thunderbolt 0000:05:00.0: unknown1: 0x0 unknown4: 0x0 > [ 76.244798] thunderbolt 0000:05:00.0: initializing Switch at 0x0 (depth: 0, up port: 7) > [ 76.284740] thunderbolt 0000:05:00.0: 0: uid: 0xedd9a650496900 > [ 76.286660] thunderbolt 0000:05:00.0: Port 1: 8086:15ea (Revision: 6, TB Version: 1, Type: Port (0x1)) > [ 76.286663] thunderbolt 0000:05:00.0: Max hop id (in/out): 19/19 > [ 76.286663] thunderbolt 0000:05:00.0: Max counters: 16 > [ 76.286664] thunderbolt 0000:05:00.0: NFC Credits: 0x3c00000 > [ 76.286664] thunderbolt 0000:05:00.0: Credits (total/control): 60/2 > [ 76.288580] thunderbolt 0000:05:00.0: Port 2: 8086:15ea (Revision: 6, TB Version: 1, Type: Port (0x1)) > [ 76.288581] thunderbolt 0000:05:00.0: Max hop id (in/out): 19/19 > [ 76.288582] thunderbolt 0000:05:00.0: Max counters: 16 > [ 76.288582] thunderbolt 0000:05:00.0: NFC Credits: 0x3c00000 > [ 76.288583] thunderbolt 0000:05:00.0: Credits (total/control): 60/2 > [ 76.290500] thunderbolt 0000:05:00.0: Port 3: 8086:15ea (Revision: 6, TB Version: 1, Type: Port (0x1)) > [ 76.290500] thunderbolt 0000:05:00.0: Max hop id (in/out): 19/19 > [ 76.290501] thunderbolt 0000:05:00.0: Max counters: 16 > [ 76.290501] thunderbolt 0000:05:00.0: NFC Credits: 0x3c00000 > [ 76.290502] thunderbolt 0000:05:00.0: Credits (total/control): 60/2 > [ 76.292416] thunderbolt 0000:05:00.0: Port 4: 8086:15ea (Revision: 6, TB Version: 1, Type: Port (0x1)) > [ 76.292417] thunderbolt 0000:05:00.0: Max hop id (in/out): 19/19 > [ 76.292417] thunderbolt 0000:05:00.0: Max counters: 16 > [ 76.292417] thunderbolt 0000:05:00.0: NFC Credits: 0x3c00000 > [ 76.292418] thunderbolt 0000:05:00.0: Credits (total/control): 60/2 > [ 76.292677] thunderbolt 0000:05:00.0: Port 5: 8086:15ea (Revision: 6, TB Version: 1, Type: DP/HDMI (0xe0101)) > [ 76.292678] thunderbolt 0000:05:00.0: Max hop id (in/out): 255/255 > [ 76.292679] thunderbolt 0000:05:00.0: Max counters: 2 > [ 76.292679] thunderbolt 0000:05:00.0: NFC Credits: 0x1800000 > [ 76.292680] thunderbolt 0000:05:00.0: Credits (total/control): 24/0 > [ 76.292932] thunderbolt 0000:05:00.0: Port 6: 8086:15ea (Revision: 6, TB Version: 1, Type: DP/HDMI (0xe0101)) > [ 76.292933] thunderbolt 0000:05:00.0: Max hop id (in/out): 255/255 > [ 76.292933] thunderbolt 0000:05:00.0: Max counters: 2 > [ 76.292934] thunderbolt 0000:05:00.0: NFC Credits: 0x1800000 > [ 76.292934] thunderbolt 0000:05:00.0: Credits (total/control): 24/0 > [ 76.293700] thunderbolt 0000:05:00.0: Port 7: 8086:15ea (Revision: 6, TB Version: 1, Type: NHI (0x2)) > [ 76.293701] thunderbolt 0000:05:00.0: Max hop id (in/out): 11/11 > [ 76.293701] thunderbolt 0000:05:00.0: Max counters: 16 > [ 76.293702] thunderbolt 0000:05:00.0: NFC Credits: 0x1800000 > [ 76.293702] thunderbolt 0000:05:00.0: Credits (total/control): 24/0 > [ 76.293956] thunderbolt 0000:05:00.0: Port 8: 8086:15ea (Revision: 6, TB Version: 1, Type: PCIe (0x100101)) > [ 76.293957] thunderbolt 0000:05:00.0: Max hop id (in/out): 8/8 > [ 76.293957] thunderbolt 0000:05:00.0: Max counters: 2 > [ 76.293958] thunderbolt 0000:05:00.0: NFC Credits: 0x800000 > [ 76.293958] thunderbolt 0000:05:00.0: Credits (total/control): 8/0 > [ 76.294212] thunderbolt 0000:05:00.0: Port 9: 8086:15ea (Revision: 6, TB Version: 1, Type: PCIe (0x100101)) > [ 76.294212] thunderbolt 0000:05:00.0: Max hop id (in/out): 8/8 > [ 76.294213] thunderbolt 0000:05:00.0: Max counters: 2 > [ 76.294213] thunderbolt 0000:05:00.0: NFC Credits: 0x800000 > [ 76.294214] thunderbolt 0000:05:00.0: Credits (total/control): 8/0 > [ 76.294724] thunderbolt 0000:05:00.0: Port 10: 8086:15ea (Revision: 6, TB Version: 1, Type: DP/HDMI (0xe0102)) > [ 76.294725] thunderbolt 0000:05:00.0: Max hop id (in/out): 9/9 > [ 76.294725] thunderbolt 0000:05:00.0: Max counters: 2 > [ 76.294726] thunderbolt 0000:05:00.0: NFC Credits: 0x800000 > [ 76.294726] thunderbolt 0000:05:00.0: Credits (total/control): 8/0 > [ 76.295232] thunderbolt 0000:05:00.0: Port 11: 8086:15ea (Revision: 6, TB Version: 1, Type: DP/HDMI (0xe0102)) > [ 76.295233] thunderbolt 0000:05:00.0: Max hop id (in/out): 9/9 > [ 76.295234] thunderbolt 0000:05:00.0: Max counters: 2 > [ 76.295234] thunderbolt 0000:05:00.0: NFC Credits: 0x800000 > [ 76.295235] thunderbolt 0000:05:00.0: Credits (total/control): 8/0 > [ 76.295488] thunderbolt 0000:05:00.0: Port 12: 8086:15ea (Revision: 6, TB Version: 1, Type: Inactive (0x0)) > [ 76.295489] thunderbolt 0000:05:00.0: Max hop id (in/out): 8/8 > [ 76.295489] thunderbolt 0000:05:00.0: Max counters: 2 > [ 76.295490] thunderbolt 0000:05:00.0: NFC Credits: 0x800000 > [ 76.295490] thunderbolt 0000:05:00.0: Credits (total/control): 8/0 > [ 76.295743] thunderbolt 0000:05:00.0: Port 13: 8086:15ea (Revision: 6, TB Version: 1, Type: Inactive (0x0)) > [ 76.295743] thunderbolt 0000:05:00.0: Max hop id (in/out): 8/8 > [ 76.295744] thunderbolt 0000:05:00.0: Max counters: 2 > [ 76.295744] thunderbolt 0000:05:00.0: NFC Credits: 0x800000 > [ 76.295745] thunderbolt 0000:05:00.0: Credits (total/control): 8/0 > [ 76.295745] thunderbolt 0000:05:00.0: 0: linked ports 1 <-> 2 > [ 76.295746] thunderbolt 0000:05:00.0: 0: linked ports 3 <-> 4 > [ 76.300868] thunderbolt 0000:05:00.0: 0: TMU: supports uni-directional mode > [ 76.300869] thunderbolt 0000:05:00.0: 0: TMU: current mode: HiFi > [ 76.300993] thunderbolt 0000:05:00.0: 0:1: is unplugged (state: 7) > [ 76.301120] thunderbolt 0000:05:00.0: 0:3: is connected, link is up (state: 2) > [ 76.301376] thunderbolt 0000:05:00.0: current switch config: > [ 76.301377] thunderbolt 0000:05:00.0: Thunderbolt 1 Switch: 8086:1549 (Revision: 0, TB Version: 1) > [ 76.301378] thunderbolt 0000:05:00.0: Max Port Number: 2 > [ 76.301378] thunderbolt 0000:05:00.0: Config: > [ 76.301378] thunderbolt 0000:05:00.0: Upstream Port Number: 1 Depth: 1 Route String: 0x3 Enabled: 1, PlugEventsDelay: 255ms > [ 76.301379] thunderbolt 0000:05:00.0: unknown1: 0x0 unknown4: 0x0 > [ 76.304961] thunderbolt 0000:05:00.0: 3: unknown capability 0xef at 0x95 > [ 76.306373] thunderbolt 0000:05:00.0: initializing Switch at 0x3 (depth: 1, up port: 1) > [ 76.323781] thunderbolt 0000:05:00.0: 3: reading drom (length: 0x7b) > [ 76.727884] thunderbolt 0000:05:00.0: 3: DROM version: 1 > [ 76.728135] thunderbolt 0000:05:00.0: 3: uid: 0x1000206596ce0 > [ 76.730061] thunderbolt 0000:05:00.0: Port 1: 8086:1549 (Revision: 0, TB Version: 1, Type: Port (0x1)) > [ 76.730062] thunderbolt 0000:05:00.0: Max hop id (in/out): 8/8 > [ 76.730063] thunderbolt 0000:05:00.0: Max counters: 4 > [ 76.730063] thunderbolt 0000:05:00.0: NFC Credits: 0x3c00000 > [ 76.730064] thunderbolt 0000:05:00.0: Credits (total/control): 60/2 > [ 76.730315] thunderbolt 0000:05:00.0: Port 2: 8086:1549 (Revision: 0, TB Version: 1, Type: PCIe (0x100102)) > [ 76.730316] thunderbolt 0000:05:00.0: Max hop id (in/out): 8/8 > [ 76.730316] thunderbolt 0000:05:00.0: Max counters: 2 > [ 76.730317] thunderbolt 0000:05:00.0: NFC Credits: 0x700000 > [ 76.730317] thunderbolt 0000:05:00.0: Credits (total/control): 7/0 > [ 76.731467] thunderbolt 0000:05:00.0: 3: TMU: current mode: bi-directional, HiFi > [ 76.731475] thunderbolt 0-3: new device found, vendor=0x1 device=0x8003 > [ 76.731477] thunderbolt 0-3: Apple, Inc. Thunderbolt to Gigabit Ethernet Adapter > [ 76.732870] thunderbolt 0000:05:00.0: discovering PCIe Up path starting from 0:9 > [ 76.733000] thunderbolt 0000:05:00.0: 0:9: In HopID: 8 => Out port: 3 Out HopID: 8 > [ 76.733001] thunderbolt 0000:05:00.0: 0:9: Weight: 1 Priority: 3 Credits: 7 Drop: 0 > [ 76.733002] thunderbolt 0000:05:00.0: 0:9: Counter enabled: 0 Counter index: 2047 > [ 76.733003] thunderbolt 0000:05:00.0: 0:9: Flow Control (In/Eg): 1/1 Shared Buffer (In/Eg): 0/0 > [ 76.733004] thunderbolt 0000:05:00.0: 0:9: Unknown1: 0x0 Unknown2: 0x0 Unknown3: 0x0 > [ 76.733127] thunderbolt 0000:05:00.0: 3:1: In HopID: 8 => Out port: 2 Out HopID: 8 > [ 76.733128] thunderbolt 0000:05:00.0: 3:1: Weight: 1 Priority: 3 Credits: 16 Drop: 0 > [ 76.733129] thunderbolt 0000:05:00.0: 3:1: Counter enabled: 0 Counter index: 2047 > [ 76.733129] thunderbolt 0000:05:00.0: 3:1: Flow Control (In/Eg): 1/0 Shared Buffer (In/Eg): 0/0 > [ 76.733130] thunderbolt 0000:05:00.0: 3:1: Unknown1: 0x0 Unknown2: 0x0 Unknown3: 0x0 > [ 76.733131] thunderbolt 0000:05:00.0: path discovery complete > [ 76.733639] thunderbolt 0000:05:00.0: discovering PCIe Down path starting from 3:2 > [ 76.733768] thunderbolt 0000:05:00.0: 3:2: In HopID: 8 => Out port: 1 Out HopID: 8 > [ 76.733769] thunderbolt 0000:05:00.0: 3:2: Weight: 1 Priority: 3 Credits: 7 Drop: 0 > [ 76.733770] thunderbolt 0000:05:00.0: 3:2: Counter enabled: 0 Counter index: 2047 > [ 76.733770] thunderbolt 0000:05:00.0: 3:2: Flow Control (In/Eg): 1/1 Shared Buffer (In/Eg): 0/0 > [ 76.733771] thunderbolt 0000:05:00.0: 3:2: Unknown1: 0x0 Unknown2: 0x0 Unknown3: 0x0 > [ 76.733893] thunderbolt 0000:05:00.0: 0:3: In HopID: 8 => Out port: 9 Out HopID: 8 > [ 76.733894] thunderbolt 0000:05:00.0: 0:3: Weight: 1 Priority: 3 Credits: 16 Drop: 0 > [ 76.733894] thunderbolt 0000:05:00.0: 0:3: Counter enabled: 0 Counter index: 2047 > [ 76.733895] thunderbolt 0000:05:00.0: 0:3: Flow Control (In/Eg): 1/0 Shared Buffer (In/Eg): 0/0 > [ 76.733896] thunderbolt 0000:05:00.0: 0:3: Unknown1: 0x0 Unknown2: 0x0 Unknown3: 0x0 > [ 76.733897] thunderbolt 0000:05:00.0: path discovery complete > [ 76.734028] thunderbolt 0000:05:00.0: 0:9 <-> 3:2 (PCI): discovered > [ 76.734150] thunderbolt 0000:05:00.0: 0:5: DP IN resource available > [ 76.734277] thunderbolt 0000:05:00.0: 0:6: DP IN resource available > > I now wonder if it's one of the PCIe connected devices in the Thunderbolt displays not "playing nice" ? They are pretty standard so I suspect myself the display side of things. Not sure if it is possible (I think it is from sysfs /sys/class/drm/*) to disable the tunneled DP connections and see if that makes it not hang. Alternatively you can try to comment out the call to tb_tunnel_dp() from the driver. Let me know if you want me to make hack patch that does it for you.
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