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authorGuennadi Liakhovetski <g.liakhovetski@gmx.de>2009-08-25 11:44:14 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2009-09-19 00:18:38 -0300
commita813d01f823259d1b27668c2149785515843a7eb (patch)
tree42c823775525880849338730e50aaba6f584fd45 /drivers/media
parent3418f165cc1cbcb30a8c017d7ebbc774710066bb (diff)
V4L/DVB (12512): ov772x: implement a band-stop filter support
The V4L2_CID_BAND_STOP_FILTER control is used to switch the "Banding Filter" on OV772x cameras on and off and to set the minimum AEC value in BDBASE register. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media')
-rw-r--r--drivers/media/video/ov772x.c52
1 files changed, 50 insertions, 2 deletions
diff --git a/drivers/media/video/ov772x.c b/drivers/media/video/ov772x.c
index 119159773a6..4c550f91ca2 100644
--- a/drivers/media/video/ov772x.c
+++ b/drivers/media/video/ov772x.c
@@ -403,8 +403,9 @@ struct ov772x_priv {
const struct ov772x_color_format *fmt;
const struct ov772x_win_size *win;
int model;
- unsigned int flag_vflip:1;
- unsigned int flag_hflip:1;
+ unsigned short flag_vflip:1;
+ unsigned short flag_hflip:1;
+ unsigned short band_filter; /* 256 - BDBASE, 0 if (!COM8[5]) */
};
#define ENDMARKER { 0xff, 0xff }
@@ -569,6 +570,15 @@ static const struct v4l2_queryctrl ov772x_controls[] = {
.step = 1,
.default_value = 0,
},
+ {
+ .id = V4L2_CID_BAND_STOP_FILTER,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Band-stop filter",
+ .minimum = 0,
+ .maximum = 256,
+ .step = 1,
+ .default_value = 0,
+ },
};
@@ -674,6 +684,9 @@ static int ov772x_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
case V4L2_CID_HFLIP:
ctrl->value = priv->flag_hflip;
break;
+ case V4L2_CID_BAND_STOP_FILTER:
+ ctrl->value = priv->band_filter;
+ break;
}
return 0;
}
@@ -700,6 +713,29 @@ static int ov772x_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
val ^= HFLIP_IMG;
ret = ov772x_mask_set(client, COM3, HFLIP_IMG, val);
break;
+ case V4L2_CID_BAND_STOP_FILTER:
+ if ((unsigned)ctrl->value > 256)
+ ctrl->value = 256;
+ if (ctrl->value == priv->band_filter)
+ break;
+ if (!ctrl->value) {
+ /* Switch the filter off, it is on now */
+ ret = ov772x_mask_set(client, BDBASE, 0xff, 0xff);
+ if (!ret)
+ ret = ov772x_mask_set(client, COM8,
+ BNDF_ON_OFF, 0);
+ } else {
+ /* Switch the filter on, set AEC low limit */
+ val = 256 - ctrl->value;
+ ret = ov772x_mask_set(client, COM8,
+ BNDF_ON_OFF, BNDF_ON_OFF);
+ if (!ret)
+ ret = ov772x_mask_set(client, BDBASE,
+ 0xff, val);
+ }
+ if (!ret)
+ priv->band_filter = ctrl->value;
+ break;
}
return ret;
@@ -893,6 +929,18 @@ static int ov772x_set_params(struct i2c_client *client,
if (ret < 0)
goto ov772x_set_fmt_error;
+ /*
+ * set COM8
+ */
+ if (priv->band_filter) {
+ ret = ov772x_mask_set(client, COM8, BNDF_ON_OFF, 1);
+ if (!ret)
+ ret = ov772x_mask_set(client, BDBASE,
+ 0xff, 256 - priv->band_filter);
+ if (ret < 0)
+ goto ov772x_set_fmt_error;
+ }
+
return ret;
ov772x_set_fmt_error: