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Add events to the watch list allocates memory. Add a cleanup function to
free all memory at cleanup time without having to remove all events
explicitly one by one.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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If a single file descriptor is being watch for multiple event types, it
will be present in multiple entries in the watch list. The
events_unwatch_fd() function will remove the first entry regardless of
its type, not allowing removal of a particular event type.
Fix this by extending the events_unwatch_fd() API to take an event type,
and remove the corresponding entry.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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The omap3-isp-live project [1] includes a generic event handling library
that implements a select-based loop. Instead of reinventing the wheel,
import the library and use it.
The original license hasn't been modified, and includes both GPL-2.0+
and LGPL-2.1+ code. The sole copyright owner is Laurent Pinchart.
[1] git://git.ideasonboard.org/omap3-isp-live.git
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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The UVC gadget driver now defines its API in the linux/usb/g_uvc.h
public header, use it instead of including an internal kernel header
through a relative path.
The public API doesn't define the UVC_INTF_CONTROL and
UVC_INTF_STREAMING macros, define them locally until we can get rid of
them.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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On alternate setting change, the webcam gadget sends us a
UVC_EVENT_STREAMON or UVC_EVENT_STREAMOFF event. In the first case, the
driver will issue a delayed status response automatically when we call
the VIDIOC_STREAMON ioctl. In the second case, the driver sends the
status response immediately. We must thus not send the status response
manually with UVCIOC_SEND_RESPONSE in any of those cases.
Without this, the ISO streaming doesn't work if host application
(e.g. luvcview) is closed and restarted.
On dwc3 gadget controller it was resulting in Buffer Expiry error on
the ISO endpoint.
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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