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V4L/DVB: uvcvideo: Restrict frame rates for Chicony CNF7129 webcam

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At all frame rates except 30fps and 5fps the camera produces very dark
pictures. Auto-exposure is probably disabled by the camera at all frame
rates except 30fps, making them pretty unusable.

Work around the problem by introducing a new RESTRICT_FRAME_RATE quirk
that disables all the frame rates except the default one.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Laurent Pinchart 2010-09-16 12:37:26 -03:00 committed by Mauro Carvalho Chehab
parent 9275b32bce
commit 86d8b6abbb
2 changed files with 16 additions and 0 deletions
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15
drivers/media/video/uvc/uvc_driver.c
View File

@ -486,6 +486,12 @@ static int uvc_parse_format(struct uvc_device *dev,
max(frame->dwFrameInterval[0],
frame->dwDefaultFrameInterval));
if (dev->quirks & UVC_QUIRK_RESTRICT_FRAME_RATE) {
frame->bFrameIntervalType = 1;
frame->dwFrameInterval[0] =
frame->dwDefaultFrameInterval;
}
uvc_trace(UVC_TRACE_DESCR, "- %ux%u (%u.%u fps)\n",
frame->wWidth, frame->wHeight,
10000000/frame->dwDefaultFrameInterval,
@ -2026,6 +2032,15 @@ static struct usb_device_id uvc_ids[] = {
.bInterfaceClass = USB_CLASS_VENDOR_SPEC,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0 },
/* Chicony CNF7129 (Asus EEE 100HE) */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x04f2,
.idProduct = 0xb071,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = UVC_QUIRK_RESTRICT_FRAME_RATE },
/* Alcor Micro AU3820 (Future Boy PC USB Webcam) */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,

1
drivers/media/video/uvc/uvcvideo.h
View File

@ -182,6 +182,7 @@ struct uvc_xu_control {
#define UVC_QUIRK_IGNORE_SELECTOR_UNIT 0x00000020
#define UVC_QUIRK_FIX_BANDWIDTH 0x00000080
#define UVC_QUIRK_PROBE_DEF 0x00000100
#define UVC_QUIRK_RESTRICT_FRAME_RATE 0x00000200
/* Format flags */
#define UVC_FMT_FLAG_COMPRESSED 0x00000001