usb: typec: ucsi: yoga-c630: remove duplicate AltModes

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On Lenovo Yoga C630 the EC firmware is buggy and it returns duplicate
AltModes over and over again instead of returning an empty one, as
demanded by the spec. Ignore extra altmodes by zeroing them in the
update_altmodes() callback. It is not possible to shortcut that in the
sync_control() callback since we need to know if the AltMode matches the
first reported AltMode or not.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20250621-c630-ucsi-v1-3-a86de5e11361@oss.qualcomm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Dmitry Baryshkov 2025-06-21 21:12:58 +03:00 • committed by Greg Kroah-Hartman

parent a669133d97

commit e0c48e42d8

1 changed files with 23 additions and 0 deletions

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drivers/usb/typec/ucsi/ucsi_yoga_c630.c

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