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media: cec/core: clarify rx-arb-lost usage message

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The rx-arb-lost error injection command only works with <op> set to 'any'.
Explicitly say so in the usage message.

Also use [] to indicate that the <poll> argument is optional.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Hans Verkuil 2021-03-31 10:32:12 +02:00 committed by Mauro Carvalho Chehab
parent 2f65dd20d0
commit 92eda6b7da
2 changed files with 2 additions and 2 deletions
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2
Documentation/userspace-api/media/cec/cec-pin-error-inj.rst
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@ -44,7 +44,7 @@ error injection status::
# <op>[,<mode>] rx-low-drive <bit> force a low-drive condition at this bit position
# <op>[,<mode>] rx-add-byte add a spurious byte to the received CEC message
# <op>[,<mode>] rx-remove-byte remove the last byte from the received CEC message
# <op>[,<mode>] rx-arb-lost <poll> generate a POLL message to trigger an arbitration lost
# any[,<mode>] rx-arb-lost [<poll>] generate a POLL message to trigger an arbitration lost
#
# TX error injection settings:
# tx-ignore-nack-until-eom ignore early NACKs until EOM

2
drivers/media/cec/core/cec-pin-error-inj.c
View File

@ -277,7 +277,7 @@ int cec_pin_error_inj_show(struct cec_adapter *adap, struct seq_file *sf)
seq_puts(sf, "# <op>[,<mode>] rx-low-drive <bit> force a low-drive condition at this bit position\n");
seq_puts(sf, "# <op>[,<mode>] rx-add-byte add a spurious byte to the received CEC message\n");
seq_puts(sf, "# <op>[,<mode>] rx-remove-byte remove the last byte from the received CEC message\n");
seq_puts(sf, "# <op>[,<mode>] rx-arb-lost <poll> generate a POLL message to trigger an arbitration lost\n");
seq_puts(sf, "# any[,<mode>] rx-arb-lost [<poll>] generate a POLL message to trigger an arbitration lost\n");
seq_puts(sf, "#\n");
seq_puts(sf, "# TX error injection settings:\n");
seq_puts(sf, "# tx-ignore-nack-until-eom ignore early NACKs until EOM\n");