kernel/linux.git/drivers/thunderbolt/switch.c, branch v6.6.39

thunderbolt: Fix wake configurations after device unplug

2024-04-27T15:11:38+00:00

commit c38fa07dc69f0b9e6f43ecab96dc7861a70c827c upstream. Currently we don't configure correctly the wake events after unplug of device router. What can happen is that the downstream ports of host router will be configured to wake on: USB4-wake and wake-on-disconnect, but not on wake-on-connect. This may cause the later plugged device not to wake the domain and fail in enumeration. Fix this by clearing downstream port's "USB4 Port is Configured" bit, after unplug of a device router. Signed-off-by: Gil Fine Cc: stable@vger.kernel.org Signed-off-by: Mika Westerberg Signed-off-by: Greg Kroah-Hartman

thunderbolt: Avoid notify PM core about runtime PM resume

2024-04-27T15:11:38+00:00

commit dcd12acaf384c30437fa5a9a1f71df06fc9835fd upstream. Currently we notify PM core about occurred wakes after any resume. This is not actually needed after resume from runtime suspend. Hence, notify PM core about occurred wakes only after resume from system sleep. Also, if the wake occurred in USB4 router upstream port, we don't notify the PM core about it since it is not actually needed and can cause unexpected autowake (e.g. if /sys/power/wakeup_count is used). While there add the missing kernel-doc for tb_switch_resume(). Signed-off-by: Gil Fine Cc: stable@vger.kernel.org Signed-off-by: Mika Westerberg Signed-off-by: Greg Kroah-Hartman

thunderbolt: Make tb_switch_reset() support Thunderbolt 2, 3 and USB4 routers

2024-04-27T15:11:35+00:00

commit ec8162b3f0683ae08a21f20517cf49272b07ee0b upstream. Currently tb_switch_reset() only did something for Thunderbolt 1 devices. Expand this to support all generations, including USB4, and both host and device routers. Signed-off-by: Sanath S Signed-off-by: Mika Westerberg Cc: Mario Limonciello Signed-off-by: Greg Kroah-Hartman

thunderbolt: Introduce tb_port_reset()

2024-04-27T15:11:35+00:00

commit 01da6b99d49f60b1edead44e33569b1a2e9f49b7 upstream. Introduce a function that issues Downstream Port Reset to a USB4 port. This supports Thunderbolt 2, 3 and USB4 routers. Signed-off-by: Sanath S Signed-off-by: Mika Westerberg Cc: Mario Limonciello Signed-off-by: Greg Kroah-Hartman

thunderbolt: Set lane bonding bit only for downstream port

2023-12-03T06:33:06+00:00

commit 24d85bb3be373b5831699bddf698b392bd2b904d upstream. Fix the lane bonding procedure to follow the steps described in USB4 Connection Manager guide. Hence, set the lane bonding bit only for downstream port. This is needed for certain ASMedia device, otherwise lane bonding fails and the device disconnects. Cc: stable@vger.kernel.org Signed-off-by: Gil Fine Signed-off-by: Mika Westerberg Signed-off-by: Greg Kroah-Hartman

thunderbolt: Check that lane 1 is in CL0 before enabling lane bonding

2023-09-15T09:59:02+00:00

Marek reported that when BlackMagic UltraStudio device is connected the kernel repeatedly tries to enable lane bonding without success making the device non-functional. It looks like the device does not have lane 1 connected at all so even though it is enabled we should not try to bond the lanes. For this reason check that lane 1 is in fact CL0 (connected, active) before attempting to bond the lanes. Reported-by: Marek Šanta Closes: https://bugzilla.kernel.org/show_bug.cgi?id=217737 Cc: stable@vger.kernel.org Signed-off-by: Mika Westerberg

thunderbolt: Check Intel vendor ID in tb_switch_get_generation()

2023-08-08T05:13:17+00:00

Only Intel made Thunderbolt 1-3 devices so to avoid possible confusion check for the Intel vendor ID before deciding the device generation. While there move the USB4 check to happen first. Signed-off-by: Mika Westerberg

thunderbolt: Add support for enhanced uni-directional TMU mode

2023-06-16T06:53:28+00:00

This is new TMU mode introduced with the USB4 v2. This mode is simpler than the existing ones and allows all CL states as well. Enable this for all links where both side routers are v2 and keep the existing functionality for the v1 and earlier links. Currently only support the MedRes rate. We can add the HiFi rate later too if it turns out to be useful. Signed-off-by: Mika Westerberg

thunderbolt: Announce USB4 v2 connection manager support

2023-06-16T06:53:28+00:00

Program the CMUV (Connection Manager USB4 Version) field for USB4 v2 and v1 routers according to the spec. Signed-off-by: Gil Fine Signed-off-by: Mika Westerberg

thunderbolt: Add support for USB4 v2 80 Gb/s link

2023-06-16T06:53:27+00:00

USB4 v2 bumps the per-lane speed up to 40 Gb/s. Also the lanes are always bonded which gives 80 Gb/s symmetric link (and 120/40 Gb/s asymmetric). This updates the speed and width of routers and XDomain connections to support the Gen 4 link. For now we keep the link as is even if it is already asymmetric. While there make tb_port_set_link_width() static. Signed-off-by: Gil Fine Signed-off-by: Mika Westerberg