[media] bttv: remove custom_irq and gpioq from bttv struct

The RC5 old decoder used custom_irq to indicate the need of handling
the IRQ on a different way. Instead of doing it, let the core just call the
bttv input IRQ handler, and add the code there to call the legacy decoder.

While here, remove the gpioq waitqueue, as this is not used anywhere, and
add a debug msg to help removing the legacy RC5 code.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/bt8xx/bttv-driver.c

@@ -4041,9 +4041,6 @@ static irqreturn_t bttv_irq(int irq, void *dev_id)
 
 	btv=(struct bttv *)dev_id;
 
-	if (btv->custom_irq)
-		handled = btv->custom_irq(btv);
-
 	count=0;
 	while (1) {
 		/* get/clear interrupt status bits */
@@ -4079,7 +4076,6 @@ static irqreturn_t bttv_irq(int irq, void *dev_id)
 			btv->field_count++;
 
 		if ((astat & BT848_INT_GPINT) && btv->remote) {
-			wake_up(&btv->gpioq);
 			bttv_input_irq(btv);
 		}
 
@@ -4284,7 +4280,6 @@ static int __devinit bttv_probe(struct pci_dev *dev,
 	mutex_init(&btv->lock);
 	spin_lock_init(&btv->s_lock);
 	spin_lock_init(&btv->gpio_lock);
-	init_waitqueue_head(&btv->gpioq);
 	init_waitqueue_head(&btv->i2c_queue);
 	INIT_LIST_HEAD(&btv->c.subs);
 	INIT_LIST_HEAD(&btv->capture);
@@ -4472,7 +4467,6 @@ static void __devexit bttv_remove(struct pci_dev *pci_dev)
 
 	/* tell gpio modules we are leaving ... */
 	btv->shutdown=1;
-	wake_up(&btv->gpioq);
 	bttv_input_fini(btv);
 	bttv_sub_del_devices(&btv->c);
 

drivers/media/video/bt8xx/bttv-input.c

@@ -120,11 +120,15 @@ static void ir_enltv_handle_key(struct bttv *btv)
 	ir->last_gpio = data | keyup;
 }
 
+static int bttv_rc5_irq(struct bttv *btv);
+
 void bttv_input_irq(struct bttv *btv)
 {
 	struct bttv_ir *ir = btv->remote;
 
-	if (!ir->polling)
+	if (ir->rc5_gpio)
+		bttv_rc5_irq(btv);
+	else if (!ir->polling)
 		ir_handle_key(btv);
 }
 
@@ -251,10 +255,6 @@ static int bttv_rc5_irq(struct bttv *btv)
 	/* read gpio port */
 	gpio = bttv_gpio_read(&btv->c);
 
-	/* remote IRQ? */
-	if (!(gpio & 0x20))
-		return 0;
-
 	/* get time of bit */
 	current_jiffies = jiffies;
 	do_gettimeofday(&tv);
@@ -267,6 +267,13 @@ static int bttv_rc5_irq(struct bttv *btv)
 		    tv.tv_usec - ir->base_time.tv_usec;
 	}
 
+	dprintk(KERN_INFO DEVNAME ": RC5 IRQ: gap %d us for %s\n",
+		gap, (gpio & 0x20) ? "mark" : "space");
+
+	/* remote IRQ? */
+	if (!(gpio & 0x20))
+		return 0;
+
 	/* active code => add bit */
 	if (ir->active) {
 		/* only if in the code (otherwise spurious IRQ or timer
@@ -479,8 +486,7 @@ int bttv_input_init(struct bttv *btv)
 		break;
 	case BTTV_BOARD_NEBULA_DIGITV:
 		ir_codes = RC_MAP_NEBULA;
-		btv->custom_irq = bttv_rc5_irq;
-		ir->rc5_gpio = 1;
+		ir->rc5_gpio = true;
 		break;
 	case BTTV_BOARD_MACHTV_MAGICTV:
 		ir_codes         = RC_MAP_APAC_VIEWCOMP;

drivers/media/video/bt8xx/bttvp.h

@@ -139,7 +139,7 @@ struct bttv_ir {
 	int                     rc5_remote_gap;
 
 	/* RC5 gpio */
-	u32                     rc5_gpio;
+	bool			rc5_gpio;   /* Is RC5 legacy GPIO enabled? */
 	u32                     last_bit;   /* last raw bit seen */
 	u32                     code;       /* raw code under construction */
 	struct timeval          base_time;  /* time of last seen code */
@@ -364,12 +364,10 @@ struct bttv {
 	struct bttv_pll_info pll;
 	int triton1;
 	int gpioirq;
-	int (*custom_irq)(struct bttv *btv);
 
 	int use_i2c_hw;
 
 	/* old gpio interface */
-	wait_queue_head_t gpioq;
 	int shutdown;
 
 	void (*volume_gpio)(struct bttv *btv, __u16 volume);