tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
V4L/DVB (9809): uvcvideo: Add nodrop module parameter to turn incomplete frame drop off.
The driver drops incomplete uncompressed video frames to avoid confusing
userspace with corrupt data. Add a nodrop module parameter to turn that
behaviour off and make all frames available to userspace.
Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
authored by
Laurent Pinchart
and committed by
Mauro Carvalho Chehab
0fbd8ee6
af009cf6
+6
-1
+3
drivers/media/video/uvc/uvc_driver.c
+3
drivers/media/video/uvc/uvc_driver.c
···
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#define DRIVER_VERSION "v0.1.0"
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#endif
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+
unsigned int uvc_no_drop_param;
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static unsigned int uvc_quirks_param;
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unsigned int uvc_trace_param;
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···
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module_init(uvc_init);
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module_exit(uvc_cleanup);
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+
module_param_named(nodrop, uvc_no_drop_param, uint, S_IRUGO|S_IWUSR);
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MODULE_PARM_DESC(nodrop, "Don't drop incomplete frames");
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module_param_named(quirks, uvc_quirks_param, uint, S_IRUGO|S_IWUSR);
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MODULE_PARM_DESC(quirks, "Forced device quirks");
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module_param_named(trace, uvc_trace_param, uint, S_IRUGO|S_IWUSR);
+2
-1
drivers/media/video/uvc/uvc_video.c
+2
-1
drivers/media/video/uvc/uvc_video.c
···
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return 0;
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}
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-
if (video->streaming->cur_format->flags & UVC_FMT_FLAG_COMPRESSED)
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+
if ((video->streaming->cur_format->flags & UVC_FMT_FLAG_COMPRESSED) ||
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+
uvc_no_drop_param)
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video->queue.flags &= ~UVC_QUEUE_DROP_INCOMPLETE;
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else
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video->queue.flags |= UVC_QUEUE_DROP_INCOMPLETE;