kernel/linux.git/drivers/thunderbolt/clx.c, branch v6.12.80

thunderbolt: Check for unplugged router in tb_switch_clx_disable()

2023-10-13T05:49:13+00:00

There is no point disabling CL states if the router is unplugged so in that case return early. Signed-off-by: Mika Westerberg

thunderbolt: Make tb_switch_clx_is_supported() static

2023-10-13T05:49:13+00:00

This function is not used outside of clx.c so make it static. No functional changes. Signed-off-by: Mika Westerberg

thunderbolt: Enable CL2 low power state

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

For USB4 v2 routers we can also enable CL2 which allows better power savings and thermal management than CL0s and CL1. Signed-off-by: Mika Westerberg

thunderbolt: Disable CL states when a DMA tunnel is established

2023-06-09T09:07:24+00:00

Tunnels between hosts should not have CL states enabled because otherwise they might enter a low power state without the other end noticing which causes packets to be lost. For this reason disable all CL states upon first DMA tunnel creation. Once the last DMA tunnel is torn down we try to re-enable them. Signed-off-by: Mika Westerberg

thunderbolt: Make tb_switch_clx_disable() return CL states that were enabled

2023-06-09T09:07:24+00:00

This allows us to disable all CL states temporarily when running lane margining and then return back the previously enabled states. Signed-off-by: Mika Westerberg

thunderbolt: Initialize CL states from the hardware

2023-06-09T09:07:24+00:00

In case the boot firmware enabled any of them, read the currently configured CL states and update the router structure accordingly. Signed-off-by: Mika Westerberg

thunderbolt: Prefix CL state related log messages with "CLx: "

2023-06-09T09:07:24+00:00

This makes it easier to spot from the logs and follows what we do with the TMU code already. We also log enabling/disabling CL states using the tb_sw_dbg() instead of tb_port_dbg(). Signed-off-by: Mika Westerberg

thunderbolt: Check for first depth router in tb.c

2023-06-09T09:07:23+00:00

Currently tb_switch_clx_enable() enables CL states only for the first depth router. This is something we may want to change in the future and in addition it is not visible from the calling path at all. For this reason do the check in the tb.c so it is immediately visible that we only do this for the first depth router. Fix the kernel-docs accordingly. Signed-off-by: Mika Westerberg

thunderbolt: Switch CL states from enum to a bitmask

2023-06-09T09:07:23+00:00

This is more natural and follows the hardware register layout better. This makes it easier to see which CL states we enable (even though they should be enabled together). Rename 'clx_mask' to 'clx' everywhere as this is now always bitmask. Signed-off-by: Mika Westerberg

thunderbolt: Get rid of __tb_switch_[en|dis]able_clx()

2023-06-09T09:07:23+00:00

No need to have separate functions for these so fold them into tb_switch_clx_enable() and tb_switch_clx_disable() accordingly. No functional changes. Signed-off-by: Mika Westerberg