提交 6833c917 编写于 作者: L Laurent Pinchart 提交者: Mauro Carvalho Chehab

V4L/DVB (8234): uvcvideo: Make input device support optional

UVC devices can report button events. The uvcvideo driver depends on
CONFIG_INPUT to report events to the input layer. This patch removes the hard
dependency by introducing a new CONFIG_USB_VIDEO_CLASS_INPUT_EVDEV option.
Signed-off-by: NLaurent Pinchart <laurent.pinchart@skynet.be>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>
上级 ac0d6df6
config USB_VIDEO_CLASS
tristate "USB Video Class (UVC)"
---help---
Support for the USB Video Class (UVC). Currently only video
input devices, such as webcams, are supported.
For more information see: <http://linux-uvc.berlios.de/>
config USB_VIDEO_CLASS_INPUT_EVDEV
bool "UVC input events device support"
default y
depends on USB_VIDEO_CLASS && INPUT
---help---
This option makes USB Video Class devices register an input device
to report button events.
If you are in doubt, say Y.
......@@ -22,6 +22,7 @@
/* --------------------------------------------------------------------------
* Input device
*/
#ifdef CONFIG_USB_VIDEO_CLASS_INPUT_EVDEV
static int uvc_input_init(struct uvc_device *dev)
{
struct usb_device *udev = dev->udev;
......@@ -67,6 +68,19 @@ static void uvc_input_cleanup(struct uvc_device *dev)
input_unregister_device(dev->input);
}
static void uvc_input_report_key(struct uvc_device *dev, unsigned int code,
int value)
{
if (dev->input)
input_report_key(dev->input, code, value);
}
#else
#define uvc_input_init(dev)
#define uvc_input_cleanup(dev)
#define uvc_input_report_key(dev, code, value)
#endif /* CONFIG_USB_VIDEO_CLASS_INPUT_EVDEV */
/* --------------------------------------------------------------------------
* Status interrupt endpoint
*/
......@@ -83,8 +97,7 @@ static void uvc_event_streaming(struct uvc_device *dev, __u8 *data, int len)
return;
uvc_trace(UVC_TRACE_STATUS, "Button (intf %u) %s len %d\n",
data[1], data[3] ? "pressed" : "released", len);
if (dev->input)
input_report_key(dev->input, BTN_0, data[3]);
uvc_input_report_key(dev, BTN_0, data[3]);
} else {
uvc_trace(UVC_TRACE_STATUS, "Stream %u error event %02x %02x "
"len %d.\n", data[1], data[2], data[3], len);
......
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