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linux/drivers/thunderbolt
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Mika Westerberg d5ada7bf3d thunderbolt: Scan retimers after device router has been enumerated 
[ Upstream commit 75749d2c1d ]

Thomas reported connection issues on AMD system with Pluggable UD-4VPD
dock. After some experiments it looks like the device has some sort of
internal timeout that triggers reconnect. This is completely against the
USB4 spec, as there is no requirement for the host to enumerate the
device right away or even at all.

In Linux case the delay is caused by scanning of retimers on the link so
we can work this around by doing the scanning after the device router
has been enumerated.

Reported-by: Thomas Lynema <lyz27@yahoo.com>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=219748
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-05-02 07:50:55 +02:00
..
acpi.c thunderbolt: Log a warning if device links are not found 2023-08-08 08:13:11 +03:00
cap.c thunderbolt: cap: Fix kernel-doc formatting issue 2021-01-28 12:33:18 +03:00
clx.c thunderbolt: Enable CL2 low power state 2023-06-16 09:53:28 +03:00
ctl.c thunderbolt: Add the new USB4 v2 notification types 2023-06-16 09:53:28 +03:00
ctl.h thunderbolt: Add support for DisplayPort bandwidth allocation mode 2023-01-17 11:37:16 +02:00
debugfs.c thunderbolt: debugfs: Fix margin debugfs node creation condition 2024-06-21 14:38:25 +02:00
dma_port.c thunderbolt: Use generic tb_nvm_[read|write]_data() for Thunderbolt 2/3 devices 2021-05-31 14:37:54 +03:00
dma_port.h thunderbolt: Convert rest of the driver files to use SPDX identifier 2018-10-02 15:52:08 -07:00
dma_test.c thunderbolt: Add support for USB4 v2 80 Gb/s link 2023-06-16 09:53:27 +03:00
domain.c thunderbolt: Reset topology created by the boot firmware 2024-04-27 17:11:35 +02:00
eeprom.c thunderbolt: Ignore data CRC mismatch for USB4 routers 2023-06-16 09:53:27 +03:00
icm.c thunderbolt: Reset topology created by the boot firmware 2024-04-27 17:11:35 +02:00
Kconfig thunderbolt: Changes for v6.1 merge window 2022-09-30 13:44:59 +02:00
lc.c thunderbolt: Introduce tb_port_reset() 2024-04-27 17:11:35 +02:00
Makefile thunderbolt: Move CLx support functions into clx.c 2023-06-09 12:07:23 +03:00
nhi.c thunderbolt: Add support for Intel Panther Lake-M/P 2025-01-09 13:31:49 +01:00
nhi.h thunderbolt: Add support for Intel Panther Lake-M/P 2025-01-09 13:31:49 +01:00
nhi_ops.c thunderbolt: Software CM only should set force power in Tiger Lake 2020-09-03 12:06:40 +03:00
nhi_regs.h thunderbolt: Reset USB4 v2 host router 2023-06-16 09:53:28 +03:00
nvm.c thunderbolt: Increase NVM_MAX_SIZE to support Intel Barlow Ridge controller 2023-06-16 09:53:28 +03:00
path.c thunderbolt: Introduce tb_path_deactivate_hop() 2024-04-27 17:11:35 +02:00
property.c thunderbolt: Add tb_property_copy_dir() 2021-03-18 18:25:31 +03:00
quirks.c thunderbolt: Keep the domain powered when USB4 port is in redrive mode 2024-04-13 13:07:38 +02:00
retimer.c thunderbolt: Don't display nvm_version unless upgrade supported 2025-01-09 13:31:49 +01:00
sb_regs.h thunderbolt: Add missing UNSET_INBOUND_SBTX for retimer access 2023-03-13 11:54:20 +02:00
switch.c thunderbolt: Fix NULL pointer dereference in tb_port_update_credits() 2024-10-04 16:30:04 +02:00
tb.c thunderbolt: Scan retimers after device router has been enumerated 2025-05-02 07:50:55 +02:00
tb.h thunderbolt: Add support for asymmetric link 2024-10-04 16:30:01 +02:00
tb_msgs.h thunderbolt: Add the new USB4 v2 notification types 2023-06-16 09:53:28 +03:00
tb_regs.h thunderbolt: Add support for asymmetric link 2024-10-04 16:30:01 +02:00
test.c thunderbolt: Add test case for 3 DisplayPort tunnels 2023-06-16 09:53:29 +03:00
tmu.c thunderbolt: Correct TMU mode initialization from hardware 2023-09-15 12:59:02 +03:00
tunnel.c thunderbolt: Introduce tb_port_path_direction_downstream() 2024-10-04 16:30:01 +02:00
tunnel.h thunderbolt: Change bandwidth reservations to comply USB4 v2 2024-10-04 16:30:01 +02:00
usb4.c thunderbolt: Fix minimum allocated USB 3.x and PCIe bandwidth 2024-10-04 16:30:04 +02:00
usb4_port.c thunderbolt: Add wake on connect/disconnect on USB4 ports 2022-11-07 14:36:47 +02:00
xdomain.c thunderbolt: Restart XDomain discovery handshake after failure 2023-09-15 13:01:18 +03:00