Gitweb:     http://git.kernel.org/linus/87a6fe4a530cc01081d19cdec4738433972fb0ee
Commit:     87a6fe4a530cc01081d19cdec4738433972fb0ee
Parent:     7a01f6dbc7abb85a6ec048dd45db92ef1b91fe78
Author:     Devin Heitmueller <dheitmueller@kernellabs.com>
AuthorDate: Thu Mar 11 21:49:24 2010 -0300
Committer:  Mauro Carvalho Chehab <mchehab@redhat.com>
CommitDate: Tue May 18 00:50:16 2010 -0300

    V4L/DVB: saa115: add support for chroma AGC and chroma gain
    
    Add support for chroma agc and gain to the saa7115 driver.  This allows for
    users to do manual adjustment for abnormal signal conditions.
    
    This work was sponsored by EyeMagnet Limited.
    
    Signed-off-by: Devin Heitmueller <dheitmueller@kernellabs.com>
    Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
---
 drivers/media/video/saa7115.c |   38 +++++++++++++++++++++++++++++++++++++-
 1 files changed, 37 insertions(+), 1 deletions(-)

diff --git a/drivers/media/video/saa7115.c b/drivers/media/video/saa7115.c
index 7d11660..f96071c 100644
--- a/drivers/media/video/saa7115.c
+++ b/drivers/media/video/saa7115.c
@@ -74,6 +74,7 @@ struct saa711x_state {
 	int contrast;
 	int hue;
 	int sat;
+	int chroma_agc;
 	int width;
 	int height;
 	u32 ident;
@@ -743,6 +744,7 @@ static int saa711x_s_clock_freq(struct v4l2_subdev *sd, u32 freq)
 static int saa711x_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 {
 	struct saa711x_state *state = to_state(sd);
+	u8 val;
 
 	switch (ctrl->id) {
 	case V4L2_CID_BRIGHTNESS:
@@ -784,7 +786,21 @@ static int saa711x_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 		state->hue = ctrl->value;
 		saa711x_write(sd, R_0D_CHROMA_HUE_CNTL, state->hue);
 		break;
-
+	case V4L2_CID_CHROMA_AGC:
+		val = saa711x_read(sd, R_0F_CHROMA_GAIN_CNTL);
+		state->chroma_agc = ctrl->value;
+		if (ctrl->value)
+			val &= 0x7f;
+		else
+			val |= 0x80;
+		saa711x_write(sd, R_0F_CHROMA_GAIN_CNTL, val);
+		break;
+	case V4L2_CID_CHROMA_GAIN:
+		/* Chroma gain cannot be set when AGC is enabled */
+		if (state->chroma_agc == 1)
+			return -EINVAL;
+		saa711x_write(sd, R_0F_CHROMA_GAIN_CNTL, ctrl->value | 0x80);
+		break;
 	default:
 		return -EINVAL;
 	}
@@ -809,6 +825,12 @@ static int saa711x_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 	case V4L2_CID_HUE:
 		ctrl->value = state->hue;
 		break;
+	case V4L2_CID_CHROMA_AGC:
+		ctrl->value = state->chroma_agc;
+		break;
+	case V4L2_CID_CHROMA_GAIN:
+		ctrl->value = saa711x_read(sd, R_0F_CHROMA_GAIN_CNTL) & 0x7f;
+		break;
 	default:
 		return -EINVAL;
 	}
@@ -1209,6 +1231,19 @@ static int saa711x_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
 		return v4l2_ctrl_query_fill(qc, 0, 127, 1, 64);
 	case V4L2_CID_HUE:
 		return v4l2_ctrl_query_fill(qc, -128, 127, 1, 0);
+	case V4L2_CID_CHROMA_AGC:
+		return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
+	case V4L2_CID_CHROMA_GAIN:
+		qc->type = V4L2_CTRL_TYPE_INTEGER;
+		qc->flags = V4L2_CTRL_FLAG_SLIDER;
+		qc->minimum = 0;
+		qc->maximum = 127;
+		qc->step = 1;
+		qc->default_value = 0x30;
+		qc->reserved[0] = 0;
+		qc->reserved[1] = 0;
+		strlcpy(qc->name, "chroma_gain", sizeof(qc->name));
+		return 0;
 	default:
 		return -EINVAL;
 	}
@@ -1593,6 +1628,7 @@ static int saa711x_probe(struct i2c_client *client,
 	state->contrast = 64;
 	state->hue = 0;
 	state->sat = 64;
+	state->chroma_agc = 1;
 	switch (chip_id) {
 	case '1':
 		state->ident = V4L2_IDENT_SAA7111;
--
To unsubscribe from this list: send the line "unsubscribe git-commits-head" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html