[4/4] cec-pin: only enable interrupts when monitoring the CEC pin

Commit Message

Hans Verkuil July 7, 2023, 11:26 a.m. UTC

The CEC interrupt is only needed if userspace wants to monitor
the CEC pin for an unconfigured CEC device. That gives it the
most precise CEC pin debugging results.

This avoids a corner case where the interrupt is enabled for
a short period when the adapter is about to be configured.

Signed-off-by: Hans Verkuil <[e-mail]>
---
 drivers/media/cec/core/cec-pin.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Patch

diff --git a/drivers/media/cec/core/cec-pin.c b/drivers/media/cec/core/cec-pin.c
index 8a3921fc9c99..330d5d5d86ab 100644
--- a/drivers/media/cec/core/cec-pin.c
+++ b/drivers/media/cec/core/cec-pin.c
@@ -982,7 +982,7 @@  static enum hrtimer_restart cec_pin_timer(struct hrtimer *timer)
 		}
 		if (pin->state != CEC_ST_IDLE || pin->ops->enable_irq == NULL ||
 		    pin->enable_irq_failed || adap->is_configuring ||
-		    adap->is_configured || adap->monitor_all_cnt)
+		    adap->is_configured || adap->monitor_all_cnt || !adap->monitor_pin_cnt)
 			break;
 		/* Switch to interrupt mode */
 		atomic_set(&pin->work_irq_change, CEC_PIN_IRQ_ENABLE);
@@ -1317,7 +1317,7 @@  void cec_pin_changed(struct cec_adapter *adap, bool value)
 
 	cec_pin_update(pin, value, false);
 	if (!value && (adap->is_configuring || adap->is_configured ||
-		       adap->monitor_all_cnt))
+		       adap->monitor_all_cnt || !adap->monitor_pin_cnt))
 		atomic_set(&pin->work_irq_change, CEC_PIN_IRQ_DISABLE);
 }
 EXPORT_SYMBOL_GPL(cec_pin_changed);