Commit e03f6fef authored by RD Babiera's avatar RD Babiera Committed by Greg Kroah-Hartman
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usb: typec: tcpm: process receive and transmission of sop' messages



Add negotiated revision and tx/rx message ids to tcpm_port specific to
SOP'. tx_sop_type is added to the tcpm_port to determine whether the
current constructed message will be sent over SOP or SOP' if not
sent immediately.

tcpm_pd_rx_handler updates the received message ids. SOP* messages are not
processed afterwards. The handler also calls tcpm_can_communicate_sop_prime
to determine if a SOP' message is directed towards the port, and drops SOP'
messages it should not respond to.

tcpm_can_communicate_sop_prime is added as a helper to determine whether
the port is capable of communicating over SOP' at a given moment. Being
the Vconn source is a requirement in Power Delivery 3.0 but only a
recommendation in Power Delviery 2.0. Because the port should ensure that
the cable is powered before communication, always enforce the port is the
Vconn source regardless of revision.

Signed-off-by: default avatarRD Babiera <rdbabiera@google.com>
Reviewed-by: default avatarHeikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20240108191620.987785-19-rdbabiera@google.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 3bbb9ba4
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