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| author | RD Babiera <[email protected]> | 2025-06-18 23:06:04 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <[email protected]> | 2025-06-24 14:42:24 +0000 |
| commit | bec15191d52300defa282e3fd83820f69e447116 (patch) | |
| tree | 65321a94f0d93dea80bfc30eadff6106ea739158 /drivers/usb/cdns3/cdnsp-debug.h | |
| parent | Revert "usb: xhci: Implement xhci_handshake_check_state() helper" (diff) | |
| download | kernel-bec15191d52300defa282e3fd83820f69e447116.tar.gz kernel-bec15191d52300defa282e3fd83820f69e447116.zip | |
usb: typec: tcpm: apply vbus before data bringup in tcpm_src_attach
This patch fixes Type-C compliance test TD 4.7.6 - Try.SNK DRP Connect
SNKAS.
tVbusON has a limit of 275ms when entering SRC_ATTACHED. Compliance
testers can interpret the TryWait.Src to Attached.Src transition after
Try.Snk as being in Attached.Src the entire time, so ~170ms is lost
to the debounce timer.
Setting the data role can be a costly operation in host mode, and when
completed after 100ms can cause Type-C compliance test check TD 4.7.5.V.4
to fail.
Turn VBUS on before tcpm_set_roles to meet timing requirement.
Fixes: f0690a25a140 ("staging: typec: USB Type-C Port Manager (tcpm)")
Cc: stable <[email protected]>
Signed-off-by: RD Babiera <[email protected]>
Reviewed-by: Badhri Jagan Sridharan <[email protected]>
Reviewed-by: Heikki Krogerus <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Diffstat (limited to 'drivers/usb/cdns3/cdnsp-debug.h')
0 files changed, 0 insertions, 0 deletions