[media] bt8xx: Add video4linux control V4L2_CID_COLOR_KILLER

Added V4L2_CID_COLOR_KILLER control to the bt8xx driver.
The control V4L2_CID_PRIVATE_CHROMA_AGC was changed too because
with this change the bttv driver must touch two bits in the
SC Loop Control Registers, for controls V4L2_CID_COLOR_KILLER
and V4L2_CID_PRIVATE_CHROMA_AGC.

Signed-off-by: Guilherme Herrmann Destefani <linuxtv@destefani.eng.br>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

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

@@ -668,6 +668,12 @@ static const struct v4l2_queryctrl bttv_ctls[] = {
 		.default_value = 32768,
 		.type          = V4L2_CTRL_TYPE_INTEGER,
 	},{
+		.id            = V4L2_CID_COLOR_KILLER,
+		.name          = "Color killer",
+		.minimum       = 0,
+		.maximum       = 1,
+		.type          = V4L2_CTRL_TYPE_BOOLEAN,
+	}, {
 		.id            = V4L2_CID_HUE,
 		.name          = "Hue",
 		.minimum       = 0,
@@ -1474,6 +1480,9 @@ static int bttv_g_ctrl(struct file *file, void *priv,
 	case V4L2_CID_SATURATION:
 		c->value = btv->saturation;
 		break;
+	case V4L2_CID_COLOR_KILLER:
+		c->value = btv->opt_color_killer;
+		break;
 
 	case V4L2_CID_AUDIO_MUTE:
 	case V4L2_CID_AUDIO_VOLUME:
@@ -1526,7 +1535,6 @@ static int bttv_s_ctrl(struct file *file, void *f,
 					struct v4l2_control *c)
 {
 	int err;
-	int val;
 	struct bttv_fh *fh = f;
 	struct bttv *btv = fh->btv;
 
@@ -1547,6 +1555,16 @@ static int bttv_s_ctrl(struct file *file, void *f,
 	case V4L2_CID_SATURATION:
 		bt848_sat(btv, c->value);
 		break;
+	case V4L2_CID_COLOR_KILLER:
+		btv->opt_color_killer = c->value;
+		if (btv->opt_color_killer) {
+			btor(BT848_SCLOOP_CKILL, BT848_E_SCLOOP);
+			btor(BT848_SCLOOP_CKILL, BT848_O_SCLOOP);
+		} else {
+			btand(~BT848_SCLOOP_CKILL, BT848_E_SCLOOP);
+			btand(~BT848_SCLOOP_CKILL, BT848_O_SCLOOP);
+		}
+		break;
 	case V4L2_CID_AUDIO_MUTE:
 		audio_mute(btv, c->value);
 		/* fall through */
@@ -1564,9 +1582,13 @@ static int bttv_s_ctrl(struct file *file, void *f,
 
 	case V4L2_CID_PRIVATE_CHROMA_AGC:
 		btv->opt_chroma_agc = c->value;
-		val = btv->opt_chroma_agc ? BT848_SCLOOP_CAGC : 0;
-		btwrite(val, BT848_E_SCLOOP);
-		btwrite(val, BT848_O_SCLOOP);
+		if (btv->opt_chroma_agc) {
+			btor(BT848_SCLOOP_CAGC, BT848_E_SCLOOP);
+			btor(BT848_SCLOOP_CAGC, BT848_O_SCLOOP);
+		} else {
+			btand(~BT848_SCLOOP_CAGC, BT848_E_SCLOOP);
+			btand(~BT848_SCLOOP_CAGC, BT848_O_SCLOOP);
+		}
 		break;
 	case V4L2_CID_PRIVATE_COMBFILTER:
 		btv->opt_combfilter = c->value;

drivers/media/pci/bt8xx/bttvp.h

@@ -429,6 +429,7 @@ struct bttv {
 	int opt_lumafilter;
 	int opt_automute;
 	int opt_chroma_agc;
+	int opt_color_killer;
 	int opt_adc_crush;
 	int opt_vcr_hack;
 	int opt_whitecrush_upper;