diff options
| author | Mario Limonciello <mario.limonciello@amd.com> | 2022-09-26 16:33:50 +0200 |
|---|---|---|
| committer | Mika Westerberg <mika.westerberg@linux.intel.com> | 2022-09-26 19:18:25 +0200 |
| commit | 5d2569cb4a65c373896ec0217febdf88739ed295 (patch) | |
| tree | e9ee7919c9fca8557180776998597d957f796ae0 /drivers/thunderbolt/switch.c | |
| parent | thunderbolt: Use dev_err_probe() (diff) | |
| download | linux-5d2569cb4a65c373896ec0217febdf88739ed295.tar.xz linux-5d2569cb4a65c373896ec0217febdf88739ed295.zip | |
thunderbolt: Explicitly enable lane adapter hotplug events at startup
Software that has run before the USB4 CM in Linux runs may have disabled
hotplug events for a given lane adapter.
Other CMs such as that one distributed with Windows 11 will enable hotplug
events. Do the same thing in the Linux CM which fixes hotplug events on
"AMD Pink Sardine".
Cc: stable@vger.kernel.org
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/thunderbolt/switch.c')
| -rw-r--r-- | drivers/thunderbolt/switch.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c index 72bc03249490..59f786a47b56 100644 --- a/drivers/thunderbolt/switch.c +++ b/drivers/thunderbolt/switch.c @@ -2900,6 +2900,26 @@ static void tb_switch_credits_init(struct tb_switch *sw) tb_sw_info(sw, "failed to determine preferred buffer allocation, using defaults\n"); } +static int tb_switch_port_hotplug_enable(struct tb_switch *sw) +{ + struct tb_port *port; + + if (tb_switch_is_icm(sw)) + return 0; + + tb_switch_for_each_port(sw, port) { + int res; + + if (!port->cap_usb4) + continue; + + res = usb4_port_hotplug_enable(port); + if (res) + return res; + } + return 0; +} + /** * tb_switch_add() - Add a switch to the domain * @sw: Switch to add @@ -2969,6 +2989,10 @@ int tb_switch_add(struct tb_switch *sw) return ret; } + ret = tb_switch_port_hotplug_enable(sw); + if (ret) + return ret; + ret = device_add(&sw->dev); if (ret) { dev_err(&sw->dev, "failed to add device: %d\n", ret); |