[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>
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@ -194,6 +194,11 @@ When a transmit finished (successfully or otherwise):
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void cec_transmit_done(struct cec_adapter *adap, u8 status, u8 arb_lost_cnt,
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u8 nack_cnt, u8 low_drive_cnt, u8 error_cnt);
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or:
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.. c:function::
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void cec_transmit_attempt_done(struct cec_adapter *adap, u8 status);
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The status can be one of:
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CEC_TX_STATUS_OK:
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@ -231,6 +236,11 @@ to 1, if the hardware does support retry then either set these counters to
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0 if the hardware provides no feedback of which errors occurred and how many
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times, or fill in the correct values as reported by the hardware.
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The cec_transmit_attempt_done() function is a helper for cases where the
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hardware never retries, so the transmit is always for just a single
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attempt. It will call cec_transmit_done() in turn, filling in 1 for the
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count argument corresponding to the status. Or all 0 if the status was OK.
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When a CEC message was received:
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.. c:function::
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@ -553,6 +553,32 @@ unlock:
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}
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EXPORT_SYMBOL_GPL(cec_transmit_done);
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void cec_transmit_attempt_done(struct cec_adapter *adap, u8 status)
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{
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switch (status) {
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case CEC_TX_STATUS_OK:
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cec_transmit_done(adap, status, 0, 0, 0, 0);
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return;
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case CEC_TX_STATUS_ARB_LOST:
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cec_transmit_done(adap, status, 1, 0, 0, 0);
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return;
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case CEC_TX_STATUS_NACK:
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cec_transmit_done(adap, status, 0, 1, 0, 0);
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return;
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case CEC_TX_STATUS_LOW_DRIVE:
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cec_transmit_done(adap, status, 0, 0, 1, 0);
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return;
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case CEC_TX_STATUS_ERROR:
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cec_transmit_done(adap, status, 0, 0, 0, 1);
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return;
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default:
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/* Should never happen */
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WARN(1, "cec-%s: invalid status 0x%02x\n", adap->name, status);
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return;
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}
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}
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EXPORT_SYMBOL_GPL(cec_transmit_attempt_done);
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/*
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* Called when waiting for a reply times out.
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*/
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@ -227,6 +227,12 @@ int cec_transmit_msg(struct cec_adapter *adap, struct cec_msg *msg,
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/* Called by the adapter */
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void cec_transmit_done(struct cec_adapter *adap, u8 status, u8 arb_lost_cnt,
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u8 nack_cnt, u8 low_drive_cnt, u8 error_cnt);
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/*
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* Simplified version of cec_transmit_done for hardware that doesn't retry
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* failed transmits. So this is always just one attempt in which case
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* the status is sufficient.
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*/
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void cec_transmit_attempt_done(struct cec_adapter *adap, u8 status);
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void cec_received_msg(struct cec_adapter *adap, struct cec_msg *msg);
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/**
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