V4L/DVB (11960): v4l: generate KEY_CAMERA instead of BTN_0 key events on input devices

A bunch of V4L drivers generate BTN_0 instead of KEY_CAMERA key presses.

X11 is able to handle KEY_CAMERA automatically these days while BTN_0 is
not treated at all.  Thus it would be of big benefit if the camera drivers
would consistently generate KEY_CAMERA.  Some drivers (uvc) already do,
this patch updates the remaining drivers to do the same.

I only possess a limited set of webcams, so this isn't tested with all
cameras.  The patch is rather trivial and compile tested, so I'd say it's
still good enough to get merged.

Signed-off-by: Lennart Poettering <mzxreary@0pointer.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/pwc/pwc-if.c

@@ -601,7 +601,7 @@ static void pwc_snapshot_button(struct pwc_device *pdev, int down)
 
 #ifdef CONFIG_USB_PWC_INPUT_EVDEV
 	if (pdev->button_dev) {
-		input_report_key(pdev->button_dev, BTN_0, down);
+		input_report_key(pdev->button_dev, KEY_CAMERA, down);
 		input_sync(pdev->button_dev);
 	}
 #endif
@@ -1847,7 +1847,7 @@ static int usb_pwc_probe(struct usb_interface *intf, const struct usb_device_id
 	usb_to_input_id(pdev->udev, &pdev->button_dev->id);
 	pdev->button_dev->dev.parent = &pdev->udev->dev;
 	pdev->button_dev->evbit[0] = BIT_MASK(EV_KEY);
-	pdev->button_dev->keybit[BIT_WORD(BTN_0)] = BIT_MASK(BTN_0);
+	pdev->button_dev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA);
 
 	rc = input_register_device(pdev->button_dev);
 	if (rc) {

drivers/media/video/usbvideo/konicawc.c

@@ -240,7 +240,7 @@ static void konicawc_register_input(struct konicawc *cam, struct usb_device *dev
 	input_dev->dev.parent = &dev->dev;
 
 	input_dev->evbit[0] = BIT_MASK(EV_KEY);
-	input_dev->keybit[BIT_WORD(BTN_0)] = BIT_MASK(BTN_0);
+	input_dev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA);
 
 	error = input_register_device(cam->input);
 	if (error) {
@@ -263,7 +263,7 @@ static void konicawc_unregister_input(struct konicawc *cam)
 static void konicawc_report_buttonstat(struct konicawc *cam)
 {
 	if (cam->input) {
-		input_report_key(cam->input, BTN_0, cam->buttonsts);
+		input_report_key(cam->input, KEY_CAMERA, cam->buttonsts);
 		input_sync(cam->input);
 	}
 }

drivers/media/video/usbvideo/quickcam_messenger.c

@@ -103,7 +103,7 @@ static void qcm_register_input(struct qcm *cam, struct usb_device *dev)
 	input_dev->dev.parent = &dev->dev;
 
 	input_dev->evbit[0] = BIT_MASK(EV_KEY);
-	input_dev->keybit[BIT_WORD(BTN_0)] = BIT_MASK(BTN_0);
+	input_dev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA);
 
 	error = input_register_device(cam->input);
 	if (error) {
@@ -126,7 +126,7 @@ static void qcm_unregister_input(struct qcm *cam)
 static void qcm_report_buttonstat(struct qcm *cam)
 {
 	if (cam->input) {
-		input_report_key(cam->input, BTN_0, cam->button_sts);
+		input_report_key(cam->input, KEY_CAMERA, cam->button_sts);
 		input_sync(cam->input);
 	}
 }