1 files changed, 28 insertions, 2 deletions

diff --git a/drivers/media/video/cx88/cx88-video.c b/drivers/media/video/cx88/cx88-video.c
index 1eea044969a1..7ec6763f0e79 100644
--- a/drivers/media/video/cx88/cx88-video.c
+++ b/drivers/media/video/cx88/cx88-video.c
@@ -228,6 +228,18 @@ static struct cx88_ctrl cx8800_ctls[] = {
 		.mask                  = 0x00ff,
 		.shift                 = 0,
 	},{
+		.v = {
+			.id            = V4L2_CID_CHROMA_AGC,
+			.name          = "Chroma AGC",
+			.minimum       = 0,
+			.maximum       = 1,
+			.default_value = 0x0,
+			.type          = V4L2_CTRL_TYPE_BOOLEAN,
+		},
+		.reg                   = MO_INPUT_FORMAT,
+		.mask                  = 1 << 10,
+		.shift                 = 10,
+	}, {
 	/* --- audio --- */
 		.v = {
 			.id            = V4L2_CID_AUDIO_MUTE,
@@ -282,6 +294,7 @@ const u32 cx88_user_ctrls[] = {
 	V4L2_CID_AUDIO_VOLUME,
 	V4L2_CID_AUDIO_BALANCE,
 	V4L2_CID_AUDIO_MUTE,
+	V4L2_CID_CHROMA_AGC,
 	0
 };
 EXPORT_SYMBOL(cx88_user_ctrls);
@@ -291,7 +304,7 @@ static const u32 *ctrl_classes[] = {
 	NULL
 };
 
-int cx8800_ctrl_query(struct v4l2_queryctrl *qctrl)
+int cx8800_ctrl_query(struct cx88_core *core, struct v4l2_queryctrl *qctrl)
 {
 	int i;
 
@@ -306,6 +319,11 @@ int cx8800_ctrl_query(struct v4l2_queryctrl *qctrl)
 		return 0;
 	}
 	*qctrl = cx8800_ctls[i].v;
+	/* Report chroma AGC as inactive when SECAM is selected */
+	if (cx8800_ctls[i].v.id == V4L2_CID_CHROMA_AGC &&
+	    core->tvnorm & V4L2_STD_SECAM)
+		qctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
+
 	return 0;
 }
 EXPORT_SYMBOL(cx8800_ctrl_query);
@@ -976,6 +994,12 @@ int cx88_set_control(struct cx88_core *core, struct v4l2_control *ctl)
 		}
 		mask=0xffff;
 		break;
+	case V4L2_CID_CHROMA_AGC:
+		/* Do not allow chroma AGC to be enabled for SECAM */
+		value = ((ctl->value - c->off) << c->shift) & c->mask;
+		if (core->tvnorm & V4L2_STD_SECAM && value)
+			return -EINVAL;
+		break;
 	default:
 		value = ((ctl->value - c->off) << c->shift) & c->mask;
 		break;
@@ -1268,10 +1292,12 @@ static int vidioc_s_input (struct file *file, void *priv, unsigned int i)
 static int vidioc_queryctrl (struct file *file, void *priv,
 				struct v4l2_queryctrl *qctrl)
 {
+	struct cx88_core *core = ((struct cx8800_fh *)priv)->dev->core;
+
 	qctrl->id = v4l2_ctrl_next(ctrl_classes, qctrl->id);
 	if (unlikely(qctrl->id == 0))
 		return -EINVAL;
-	return cx8800_ctrl_query(qctrl);
+	return cx8800_ctrl_query(core, qctrl);
 }
 
 static int vidioc_g_ctrl (struct file *file, void *priv,