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| author |   Hans Verkuil <hans.verkuil@cisco.com> | 2018-10-05 08:58:12 -0400 |
|---|---|---|
| committer |   Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2018-10-05 11:04:39 -0400 |
| commit | 81e33279d154599db64d608b2a1db619f3b56ce1 (patch) | |
| tree | db24c9c1153ce25ec6aad32475dfb310d570f077 /Documentation/media | |
| parent | Revert "media: dvbsky: use just one mutex for serializing device R/W ops" (diff) | |
| download | linux-dev-81e33279d154599db64d608b2a1db619f3b56ce1.tar.xz linux-dev-81e33279d154599db64d608b2a1db619f3b56ce1.zip | |
media: cec-core.rst: improve cec_transmit_done documentation
Clarify that calling cec_transmit_done can start a new transmit and
that you should put the hardware in a state that allows for a new
transmit before calling this function.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Diffstat (limited to 'Documentation/media')
| -rw-r--r-- | Documentation/media/kapi/cec-core.rst | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/media/kapi/cec-core.rst b/Documentation/media/kapi/cec-core.rst index 1d989c544370..bca1d9d1d223 100644 --- a/Documentation/media/kapi/cec-core.rst +++ b/Documentation/media/kapi/cec-core.rst @@ -268,6 +268,10 @@ to 1, if the hardware does support retry then either set these counters to 0 if the hardware provides no feedback of which errors occurred and how many times, or fill in the correct values as reported by the hardware. +Be aware that calling these functions can immediately start a new transmit +if there is one pending in the queue. So make sure that the hardware is in +a state where new transmits can be started *before* calling these functions. + The cec_transmit_attempt_done() function is a helper for cases where the hardware never retries, so the transmit is always for just a single attempt. It will call cec_transmit_done() in turn, filling in 1 for the |