[media] cec: add cec_transmit_attempt_done helper function

A simpler variant of cec_transmit_done to be used where the HW does
just a single attempt at a transmit. So if the status indicates an
error, then the corresponding error count will always be 1 and this
function figures that out based on the status argument.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/Documentation/media/kapi/cec-core.rst b/Documentation/media/kapi/cec-core.rst
index 278b358b2f2e..8a65c69ed071 100644
--- a/Documentation/media/kapi/cec-core.rst
+++ b/Documentation/media/kapi/cec-core.rst
@@ -194,6 +194,11 @@ When a transmit finished (successfully or otherwise):
 	void cec_transmit_done(struct cec_adapter *adap, u8 status, u8 arb_lost_cnt,
 		       u8 nack_cnt, u8 low_drive_cnt, u8 error_cnt);
 
+or:
+
+.. c:function::
+	void cec_transmit_attempt_done(struct cec_adapter *adap, u8 status);
+
 The status can be one of:
 
 CEC_TX_STATUS_OK:
@@ -231,6 +236,11 @@ 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.
 
+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
+count argument corresponding to the status. Or all 0 if the status was OK.
+
 When a CEC message was received:
 
 .. c:function::