V4L/DVB: gspca - ov534: Add Powerline Frequency control
Note that setting this options to 50Hz can reduce the framerate, so it is
still disabled (60Hz) by default.
Signed-off-by: Mosalam Ebrahimi <m.ebrahimi@ieee.org>
Signed-off-by: Antonio Ospite <ospite@studenti.unina.it>
Signed-off-by: Jean-François Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/gspca/ov534.c b/drivers/media/video/gspca/ov534.c
index 8783844..29af17e 100644
--- a/drivers/media/video/gspca/ov534.c
+++ b/drivers/media/video/gspca/ov534.c
@@ -66,7 +66,7 @@
s8 sharpness;
u8 hflip;
u8 vflip;
-
+ u8 freqfltr;
};
/* V4L2 controls supported by the driver */
@@ -90,6 +90,10 @@
static int sd_getbrightness(struct gspca_dev *gspca_dev, __s32 *val);
static int sd_setcontrast(struct gspca_dev *gspca_dev, __s32 val);
static int sd_getcontrast(struct gspca_dev *gspca_dev, __s32 *val);
+static int sd_setfreqfltr(struct gspca_dev *gspca_dev, __s32 val);
+static int sd_getfreqfltr(struct gspca_dev *gspca_dev, __s32 *val);
+static int sd_querymenu(struct gspca_dev *gspca_dev,
+ struct v4l2_querymenu *menu);
static const struct ctrl sd_ctrls[] = {
{ /* 0 */
@@ -233,6 +237,20 @@
.set = sd_setvflip,
.get = sd_getvflip,
},
+ { /* 10 */
+ {
+ .id = V4L2_CID_POWER_LINE_FREQUENCY,
+ .type = V4L2_CTRL_TYPE_MENU,
+ .name = "Light Frequency Filter",
+ .minimum = 0,
+ .maximum = 1,
+ .step = 1,
+#define FREQFLTR_DEF 0
+ .default_value = FREQFLTR_DEF,
+ },
+ .set = sd_setfreqfltr,
+ .get = sd_getfreqfltr,
+ },
};
static const struct v4l2_pix_format ov772x_mode[] = {
@@ -784,6 +802,17 @@
sccb_reg_read(gspca_dev, 0x0c) & ~0x80);
}
+static void setfreqfltr(struct gspca_dev *gspca_dev)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+
+ if (sd->freqfltr == 0)
+ sccb_reg_write(gspca_dev, 0x2b, 0x00);
+ else
+ sccb_reg_write(gspca_dev, 0x2b, 0x9e);
+}
+
+
/* this function is called at probe time */
static int sd_config(struct gspca_dev *gspca_dev,
const struct usb_device_id *id)
@@ -817,6 +846,7 @@
sd->sharpness = SHARPNESS_DEF;
sd->hflip = HFLIP_DEF;
sd->vflip = VFLIP_DEF;
+ sd->freqfltr = FREQFLTR_DEF;
return 0;
}
@@ -886,6 +916,7 @@
setsharpness(gspca_dev);
setvflip(gspca_dev);
sethflip(gspca_dev);
+ setfreqfltr(gspca_dev);
ov534_set_led(gspca_dev, 1);
ov534_reg_write(gspca_dev, 0xe0, 0x00);
@@ -1179,6 +1210,43 @@
return 0;
}
+static int sd_setfreqfltr(struct gspca_dev *gspca_dev, __s32 val)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+
+ sd->freqfltr = val;
+ if (gspca_dev->streaming)
+ setfreqfltr(gspca_dev);
+ return 0;
+}
+
+static int sd_getfreqfltr(struct gspca_dev *gspca_dev, __s32 *val)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+
+ *val = sd->freqfltr;
+ return 0;
+}
+
+static int sd_querymenu(struct gspca_dev *gspca_dev,
+ struct v4l2_querymenu *menu)
+{
+ switch (menu->id) {
+ case V4L2_CID_POWER_LINE_FREQUENCY:
+ switch (menu->index) {
+ case 0: /* V4L2_CID_POWER_LINE_FREQUENCY_DISABLED */
+ strcpy((char *) menu->name, "Disabled");
+ return 0;
+ case 1: /* V4L2_CID_POWER_LINE_FREQUENCY_50HZ */
+ strcpy((char *) menu->name, "50 Hz");
+ return 0;
+ }
+ break;
+ }
+
+ return -EINVAL;
+}
+
/* get stream parameters (framerate) */
static int sd_get_streamparm(struct gspca_dev *gspca_dev,
struct v4l2_streamparm *parm)
@@ -1230,6 +1298,7 @@
.start = sd_start,
.stopN = sd_stopN,
.pkt_scan = sd_pkt_scan,
+ .querymenu = sd_querymenu,
.get_streamparm = sd_get_streamparm,
.set_streamparm = sd_set_streamparm,
};