media: cec: replace pin->cur_value by adap->cec_pin_is_high

The current CEC pin value (0 or 1) was part of the cec_pin struct,
but that assumes that CEC pin monitoring can only be used with
a driver that uses the low-level CEC pin framework.

But hardware that has both a high-level API and can monitor the
CEC pin at low-level at the same time does not need to depend on
the cec pin framework.

To support such devices remove the cur_value field from struct cec_pin
and add a cec_pin_is_high field to cec_adapter. This also makes it
possible to drop the '#ifdef CONFIG_CEC_PIN' in cec-api.c.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/cec/cec-api.c

@@ -444,15 +444,13 @@ static long cec_s_mode(struct cec_adapter *adap, struct cec_fh *fh,
 	if (mode_follower == CEC_MODE_FOLLOWER)
 		adap->follower_cnt++;
 	if (mode_follower == CEC_MODE_MONITOR_PIN) {
-#ifdef CONFIG_CEC_PIN
 		struct cec_event ev = {
 			.flags = CEC_EVENT_FL_INITIAL_STATE,
 		};
 
-		ev.event = adap->pin->cur_value ? CEC_EVENT_PIN_CEC_HIGH :
-						  CEC_EVENT_PIN_CEC_LOW;
+		ev.event = adap->cec_pin_is_high ? CEC_EVENT_PIN_CEC_HIGH :
+						   CEC_EVENT_PIN_CEC_LOW;
 		cec_queue_event_fh(fh, &ev, 0);
-#endif
 		adap->monitor_pin_cnt++;
 	}
 	if (mode_follower == CEC_MODE_EXCL_FOLLOWER ||

drivers/media/cec/cec-core.c

@@ -227,6 +227,7 @@ struct cec_adapter *cec_allocate_adapter(const struct cec_adap_ops *ops,
 		return ERR_PTR(-ENOMEM);
 	strlcpy(adap->name, name, sizeof(adap->name));
 	adap->phys_addr = CEC_PHYS_ADDR_INVALID;
+	adap->cec_pin_is_high = true;
 	adap->log_addrs.cec_version = CEC_OP_CEC_VERSION_2_0;
 	adap->log_addrs.vendor_id = CEC_VENDOR_ID_NONE;
 	adap->capabilities = caps;

drivers/media/cec/cec-pin.c

@@ -88,10 +88,10 @@ static const struct cec_state states[CEC_PIN_STATES] = {
 
 static void cec_pin_update(struct cec_pin *pin, bool v, bool force)
 {
-	if (!force && v == pin->cur_value)
+	if (!force && v == pin->adap->cec_pin_is_high)
 		return;
 
-	pin->cur_value = v;
+	pin->adap->cec_pin_is_high = v;
 	if (atomic_read(&pin->work_pin_events) < CEC_NUM_PIN_EVENTS) {
 		pin->work_pin_is_high[pin->work_pin_events_wr] = v;
 		pin->work_pin_ts[pin->work_pin_events_wr] = ktime_get();
@@ -781,7 +781,6 @@ struct cec_adapter *cec_pin_allocate_adapter(const struct cec_pin_ops *pin_ops,
 	if (pin == NULL)
 		return ERR_PTR(-ENOMEM);
 	pin->ops = pin_ops;
-	pin->cur_value = true;
 	hrtimer_init(&pin->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
 	pin->timer.function = cec_pin_timer;
 	init_waitqueue_head(&pin->kthread_waitq);

include/media/cec-pin.h

@@ -128,7 +128,6 @@ struct cec_pin {
 	u16				la_mask;
 	bool				enabled;
 	bool				monitor_all;
-	bool				cur_value;
 	bool				rx_eom;
 	bool				enable_irq_failed;
 	enum cec_pin_state		state;

include/media/cec.h

@@ -180,6 +180,7 @@ struct cec_adapter {
 	bool needs_hpd;
 	bool is_configuring;
 	bool is_configured;
+	bool cec_pin_is_high;
 	u32 monitor_all_cnt;
 	u32 monitor_pin_cnt;
 	u32 follower_cnt;