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.
Cc: stable.org
Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
---
drivers/media/video/uvc/uvc_driver.c | 15 +++++++++++++++
drivers/media/video/uvc/uvcvideo.h | 1 +
2 files changed, 16 insertions(+), 0 deletions(-)
diff --git a/drivers/media/video/uvc/uvc_driver.c b/drivers/media/video/uvc/uvc_driver.c
index a4bdbac..93d78f6 100644
--- a/drivers/media/video/uvc/uvc_driver.c
+++ b/drivers/media/video/uvc/uvc_driver.c
@@ -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,
@@ -2027,6 +2033,15 @@ 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,
diff --git a/drivers/media/video/uvc/uvcvideo.h b/drivers/media/video/uvc/uvcvideo.h
index bdacf3b..892e0e5 100644
--- a/drivers/media/video/uvc/uvcvideo.h
+++ b/drivers/media/video/uvc/uvcvideo.h
@@ -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
--
1.7.2.2
--
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