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V4L/DVB (9686): gspca: Don't return the control values from the webcams in spca501. 

The bridge takes some time to update after a write, so apps doing a quick
write/read can get the old value back.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans de Goede 2008-11-17 14:56:41 -03:00 committed by Mauro Carvalho Chehab
parent cc043428e5
commit bd131f38aa
1 changed files with 0 additions and 34 deletions
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34
drivers/media/video/gspca/spca501.c
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@ -1822,29 +1822,6 @@ static int reg_write(struct usb_device *dev,
return ret;
}
/* returns: negative is error, pos or zero is data */
static int reg_read(struct gspca_dev *gspca_dev,
__u16 req, /* bRequest */
__u16 index, /* wIndex */
__u16 length) /* wLength (1 or 2 only) */
{
int ret;
gspca_dev->usb_buf[1] = 0;
ret = usb_control_msg(gspca_dev->dev,
usb_rcvctrlpipe(gspca_dev->dev, 0),
req,
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
0, /* value */
index,
gspca_dev->usb_buf, length,
500); /* timeout */
if (ret < 0) {
PDEBUG(D_ERR, "reg_read err %d", ret);
return -1;
}
return (gspca_dev->usb_buf[1] << 8) + gspca_dev->usb_buf[0];
}
static int write_vector(struct gspca_dev *gspca_dev,
const __u16 data[][3])
@ -1876,11 +1853,6 @@ static void setbrightness(struct gspca_dev *gspca_dev)
static void getbrightness(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
__u16 brightness;
brightness = reg_read(gspca_dev, SPCA501_REG_CCDSP, 0x11, 2);
sd->brightness = brightness << 1;
}
static void setcontrast(struct gspca_dev *gspca_dev)
@ -1895,7 +1867,6 @@ static void setcontrast(struct gspca_dev *gspca_dev)
static void getcontrast(struct gspca_dev *gspca_dev)
{
/* spca50x->contrast = 0xaa01; */
}
static void setcolors(struct gspca_dev *gspca_dev)
@ -1907,11 +1878,6 @@ static void setcolors(struct gspca_dev *gspca_dev)
static void getcolors(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
sd->colors = reg_read(gspca_dev, SPCA501_REG_CCDSP, 0x0c, 2);
/* sd->hue = (reg_read(gspca_dev, SPCA501_REG_CCDSP, 0x13, */
/* 2) & 0xFF) << 8; */
}
/* this function is called at probe time */