The CEC pin framework has to wait for the CEC bus to be idle for the
requested Signal Free Time before it can start a transmit.
However, the check for that was off by one, so transmits would start one
bit period (2.4ms) too late.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
---
diff --git a/drivers/media/cec/core/cec-pin.c b/drivers/media/cec/core/cec-pin.c
index f006bd8eec63..195576a53c82 100644
--- a/drivers/media/cec/core/cec-pin.c
+++ b/drivers/media/cec/core/cec-pin.c
@@ -957,7 +957,7 @@ static enum hrtimer_restart cec_pin_timer(struct hrtimer *timer)
* so we can kick off the pending transmit.
*/
delta = ktime_us_delta(ts, pin->ts);
- if (delta / CEC_TIM_DATA_BIT_TOTAL >
+ if (delta / CEC_TIM_DATA_BIT_TOTAL >=
pin->tx_signal_free_time) {
pin->tx_nacked = false;
if (tx_custom_start(pin))
@@ -968,7 +968,7 @@ static enum hrtimer_restart cec_pin_timer(struct hrtimer *timer)
cec_pin_low(pin);
break;
}
- if (delta / CEC_TIM_DATA_BIT_TOTAL >
+ if (delta / CEC_TIM_DATA_BIT_TOTAL >=
pin->tx_signal_free_time - 1)
pin->state = CEC_ST_TX_WAIT;
break;
