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| author | Jos Wang <[email protected]> | 2025-02-13 13:49:21 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <[email protected]> | 2025-02-14 08:26:44 +0000 |
| commit | 659f5d55feb75782bd46cf130da3c1f240afe9ba (patch) | |
| tree | d321148200d5d69357836b21fbcee38385e9b27d /net/unix/garbage.c | |
| parent | usb: roles: set switch registered flag early on (diff) | |
| download | kernel-659f5d55feb75782bd46cf130da3c1f240afe9ba.tar.gz kernel-659f5d55feb75782bd46cf130da3c1f240afe9ba.zip | |
usb: typec: tcpm: PSSourceOffTimer timeout in PR_Swap enters ERROR_RECOVERY
As PD2.0 spec ("6.5.6.2 PSSourceOffTimer")，the PSSourceOffTimer is
used by the Policy Engine in Dual-Role Power device that is currently
acting as a Sink to timeout on a PS_RDY Message during a Power Role
Swap sequence. This condition leads to a Hard Reset for USB Type-A and
Type-B Plugs and Error Recovery for Type-C plugs and return to USB
Default Operation.
Therefore, after PSSourceOffTimer timeout, the tcpm state machine should
switch from PR_SWAP_SNK_SRC_SINK_OFF to ERROR_RECOVERY. This can also
solve the test items in the USB power delivery compliance test:
TEST.PD.PROT.SNK.12 PR_Swap – PSSourceOffTimer Timeout
[1] https://usb.org/document-library/usb-power-delivery-compliance-test-specification-0/USB_PD3_CTS_Q4_2025_OR.zip
Fixes: f0690a25a140 ("staging: typec: USB Type-C Port Manager (tcpm)")
Cc: stable <[email protected]>
Signed-off-by: Jos Wang <[email protected]>
Reviewed-by: Heikki Krogerus <[email protected]>
Tested-by: Amit Sunil Dhamne <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Diffstat (limited to 'net/unix/garbage.c')
0 files changed, 0 insertions, 0 deletions