diff options
| author | Theodore Kilgore <kilgota@auburn.edu> | 2009-12-25 05:15:10 -0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-03-15 08:49:36 -0700 |
| commit | 6e8b0197a96edcf0c650b508f2906e0245f73dee (patch) | |
| tree | 18845b91c4c00e07228bf46e752e35174f506ced /drivers/media | |
| parent | 764309980c4e68ea2d3312199e436ac8549e5f84 (diff) | |
V4L/DVB (13991): gspca_mr973010a: Fix cif type 1 cameras not streaming on UHCI controllers
commit 70136081fc67ea77d849f86fa323e5773c8e40ea upstream.
If you read the mail to Oliver Neukum on the linux-usb list, then you know
that I found a cure for the mysterious problem that the MR97310a CIF "type
1" cameras have been freezing up and refusing to stream if hooked up to a
machine with a UHCI controller.
Namely, the cure is that if the camera is an mr97310a CIF type 1 camera, you
have to send it 0xa0, 0x00. Somehow, this is a timing reset command, or
such. It un-blocks whatever was previously stopping the CIF type 1 cameras
from working on the UHCI-based machines.
Signed-off-by: Theodore Kilgore <kilgota@auburn.edu>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/video/gspca/mr97310a.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/media/video/gspca/mr97310a.c b/drivers/media/video/gspca/mr97310a.c index f8328b9efae5..d61767cd7a51 100644 --- a/drivers/media/video/gspca/mr97310a.c +++ b/drivers/media/video/gspca/mr97310a.c @@ -530,6 +530,12 @@ static int start_cif_cam(struct gspca_dev *gspca_dev) {0x13, 0x00, {0x01}, 1}, {0, 0, {0}, 0} }; + /* Without this command the cam won't work with USB-UHCI */ + gspca_dev->usb_buf[0] = 0x0a; + gspca_dev->usb_buf[1] = 0x00; + err_code = mr_write(gspca_dev, 2); + if (err_code < 0) + return err_code; err_code = sensor_write_regs(gspca_dev, cif_sensor1_init_data, ARRAY_SIZE(cif_sensor1_init_data)); } |