From 70136081fc67ea77d849f86fa323e5773c8e40ea Mon Sep 17 00:00:00 2001 From: Theodore Kilgore Date: Fri, 25 Dec 2009 05:15:10 -0300 Subject: [PATCH] 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 Signed-off-by: Hans de Goede Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/gspca/mr97310a.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/media/video/gspca/mr97310a.c b/drivers/media/video/gspca/mr97310a.c index a9178d9d6745..d842e8184426 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)); } -- 2.34.1