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authorTheodore Kilgore <kilgota@auburn.edu>2009-12-25 05:15:10 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2010-02-26 15:10:38 -0300
commit70136081fc67ea77d849f86fa323e5773c8e40ea (patch)
tree2f55183c35e9f95ccd69d700904513cc6d1a662c
parent225ee0ca190b2e5d1d20c6278b6369b987aaaddf (diff)
V4L/DVB (13991): gspca_mr973010a: Fix cif type 1 cameras not streaming on UHCI controllers
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>
-rw-r--r--drivers/media/video/gspca/mr97310a.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/media/video/gspca/mr97310a.c b/drivers/media/video/gspca/mr97310a.c
index a9178d9d674..d842e818442 100644
--- a/drivers/media/video/gspca/mr97310a.c
+++ b/drivers/media/video/gspca/mr97310a.c
@@ -697,6 +697,12 @@ 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));
}