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| author | Mika Westerberg <mika.westerberg@linux.intel.com> | 2023-03-21 11:40:49 +0200 |
|---|---|---|
| committer | Mika Westerberg <mika.westerberg@linux.intel.com> | 2024-06-17 12:47:12 +0300 |
| commit | ff6ab055e070d819f51196622e08f8941b6d2a4b (patch) | |
| tree | a25e205a3055875b0a003f1a8b7747aa00866abc /drivers/thunderbolt/tb.h | |
| parent | 0890fc36c70c8d5e80dc128c3a9d7a9122646869 (diff) | |
| download | lwn-ff6ab055e070d819f51196622e08f8941b6d2a4b.tar.gz lwn-ff6ab055e070d819f51196622e08f8941b6d2a4b.zip | |
thunderbolt: Add receiver lane margining support for retimers
Retimers support lane margining as well so make this available through
debugfs in the same way as we do for the USB4 ports. When this is
enabled we also expose retimers on the other side of the cable because
typically margining is implemented only on direction towards the cable.
However, for the retimers on the other side of the cable we do not allow
NVM upgrade to avoid confusing the existing userspace (the same retimer
may now appear twice with different name) and is probably not a good
idea anyway.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/thunderbolt/tb.h')
| -rw-r--r-- | drivers/thunderbolt/tb.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h index 2f3de3d3c2e0..b47f7873c847 100644 --- a/drivers/thunderbolt/tb.h +++ b/drivers/thunderbolt/tb.h @@ -329,6 +329,7 @@ struct usb4_port { * @nvm: Pointer to the NVM if the retimer has one (%NULL otherwise) * @no_nvm_upgrade: Prevent NVM upgrade of this retimer * @auth_status: Status of last NVM authentication + * @margining: Pointer to margining structure if enabled */ struct tb_retimer { struct device dev; @@ -340,6 +341,9 @@ struct tb_retimer { struct tb_nvm *nvm; bool no_nvm_upgrade; u32 auth_status; +#ifdef CONFIG_USB4_DEBUGFS_MARGINING + struct tb_margining *margining; +#endif }; /** @@ -1363,6 +1367,7 @@ int usb4_port_sw_margin_errors(struct tb_port *port, enum usb4_sb_target target, 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_is_last(struct tb_port *port, u8 index); +int usb4_port_retimer_is_cable(struct tb_port *port, u8 index); int usb4_port_retimer_nvm_sector_size(struct tb_port *port, u8 index); int usb4_port_retimer_nvm_set_offset(struct tb_port *port, u8 index, unsigned int address); |