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| author | Gil Fine <gil.fine@linux.intel.com> | 2023-03-03 00:17:24 +0200 |
|---|---|---|
| committer | Mika Westerberg <mika.westerberg@linux.intel.com> | 2023-03-13 11:54:20 +0200 |
| commit | cd0c1e582b055dea615001b8bd8eccaf6f69f7ce (patch) | |
| tree | c20328d62dc988a28479aa1abcedee61dd596b83 /drivers/thunderbolt/tb.h | |
| parent | acec726473822bc6b585961f4ca2a11fa7f28341 (diff) | |
| download | lwn-cd0c1e582b055dea615001b8bd8eccaf6f69f7ce.tar.gz lwn-cd0c1e582b055dea615001b8bd8eccaf6f69f7ce.zip | |
thunderbolt: Add missing UNSET_INBOUND_SBTX for retimer access
According to USB4 retimer specification, the process of firmware update
sequence requires issuing a SET_INBOUND_SBTX port operation that later
shall be followed by UNSET_INBOUND_SBTX port operation. This last step
is not currently issued by the driver but it is necessary to make sure
the retimers are put back to passthrough mode even during enumeration.
If this step is missing the link may not come up properly after
soft-reboot for example.
For this reason issue UNSET_INBOUND_SBTX after SET_INBOUND_SBTX for
enumeration and also when the NVM upgrade is run.
Reported-by: Christian Schaubschläger <christian.schaubschlaeger@gmx.at>
Link: https://lore.kernel.org/linux-usb/b556f5ed-5ee8-9990-9910-afd60db93310@gmx.at/
Cc: stable@vger.kernel.org
Signed-off-by: Gil Fine <gil.fine@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/thunderbolt/tb.h')
| -rw-r--r-- | drivers/thunderbolt/tb.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h index 64968c162ec7..b3cd13dc783b 100644 --- a/drivers/thunderbolt/tb.h +++ b/drivers/thunderbolt/tb.h @@ -1242,6 +1242,7 @@ int usb4_port_sw_margin(struct tb_port *port, unsigned int lanes, bool timing, int usb4_port_sw_margin_errors(struct tb_port *port, u32 *errors); int usb4_port_retimer_set_inbound_sbtx(struct tb_port *port, u8 index); +int usb4_port_retimer_unset_inbound_sbtx(struct tb_port *port, u8 index); int usb4_port_retimer_read(struct tb_port *port, u8 index, u8 reg, void *buf, u8 size); int usb4_port_retimer_write(struct tb_port *port, u8 index, u8 reg, |