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| author |  Mika Westerberg <mika.westerberg@linux.intel.com>
| 2022-02-22 19:31:47 +0200 |
|---|---|---|
| committer | Mika Westerberg <mika.westerberg@linux.intel.com>
| 2022-09-05 09:02:16 +0300 |
| commit | d0f1e0c2a6990922818d6616a48d3d92bb7ddac1 (patch) | |
| tree | 790dd5ce9dca0cc9a5631208d87041fa8c2d51be /drivers/thunderbolt/xdomain.c | |
| parent | thunderbolt: Add helper to check if CL states are enabled on port (diff) | |
| download | linux-d0f1e0c2a6990922818d6616a48d3d92bb7ddac1.tar.gz linux-d0f1e0c2a6990922818d6616a48d3d92bb7ddac1.tar.bz2 linux-d0f1e0c2a6990922818d6616a48d3d92bb7ddac1.zip | |
thunderbolt: Add support for receiver lane margining
USB4 spec defines standard set of registers to be used for receiver lane
margining. This is useful for I/O interface quality and electrical
robustness validation during manufacturing. Expose receiver lane
margining through new debugfs directory "margining" that is added under
each connected USB4 port. Users can then run the margining by writing to
the exposed attributes under that directory.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/thunderbolt/xdomain.c')
| -rw-r--r-- | drivers/thunderbolt/xdomain.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/thunderbolt/xdomain.c b/drivers/thunderbolt/xdomain.c index e4bbc4cb5f97..dcee91f25075 100644 --- a/drivers/thunderbolt/xdomain.c +++ b/drivers/thunderbolt/xdomain.c @@ -1435,6 +1435,8 @@ static int tb_xdomain_get_properties(struct tb_xdomain *xd) if (xd->vendor_name && xd->device_name) dev_info(&xd->dev, "%s %s\n", xd->vendor_name, xd->device_name); + + tb_xdomain_debugfs_init(xd); } else { kobject_uevent(&xd->dev.kobj, KOBJ_CHANGE); } @@ -1935,6 +1937,8 @@ static int unregister_service(struct device *dev, void *data) */ void tb_xdomain_remove(struct tb_xdomain *xd) { + tb_xdomain_debugfs_remove(xd); + stop_handshake(xd); device_for_each_child_reverse(&xd->dev, xd, unregister_service); |