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| author | Hans de Goede <hdegoede@redhat.com> | 2019-03-16 16:57:12 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-03-19 14:57:31 +0100 |
| commit | 976daf9d1199932df80e7b04546d1a1bd4ed5ece (patch) | |
| tree | 7397ada35aa98305a922f4fdf0b0403e1f7a29a0 /usr | |
| parent | 40fc165304f0faaae78b761f8ee30b5d216b1850 (diff) | |
usb: typec: tcpm: Try PD-2.0 if sink does not respond to 3.0 source-caps
PD 2.0 sinks are supposed to accept src-capabilities with a 3.0 header and
simply ignore any src PDOs which the sink does not understand such as PPS
but some 2.0 sinks instead ignore the entire PD_DATA_SOURCE_CAP message,
causing contract negotiation to fail.
This commit fixes such sinks not working by re-trying the contract
negotiation with PD-2.0 source-caps messages if we don't have a contract
after PD_N_HARD_RESET_COUNT hard-reset attempts.
The problem fixed by this commit was noticed with a Type-C to VGA dongle.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'usr')
0 files changed, 0 insertions, 0 deletions