[media] v4l2-ioctl: call g_selection before calling cropcap

If the vidioc_cropcap op is implemented by the driver then the v4l2
core will call that directly.

If g_selection is available, then the core cropcap implementation
uses g_selection to fill in the bounds and defrect and it sets the
pixelaspect to 1x1.

But if both are available, then I would like to use g_selection to
fill in defrect and bounds before calling cropcap. That way the
driver's cropcap implementation doesn't have to set defrect or
bounds.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/v4l2-core/v4l2-ioctl.c

@@ -1842,37 +1842,41 @@ static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
 				struct file *file, void *fh, void *arg)
 {
 	struct v4l2_cropcap *p = arg;
-	struct v4l2_selection s = { .type = p->type };
-	int ret;
 
-	if (ops->vidioc_cropcap)
-		return ops->vidioc_cropcap(file, fh, p);
+	if (ops->vidioc_g_selection) {
+		struct v4l2_selection s = { .type = p->type };
+		int ret;
 
-	/* obtaining bounds */
-	if (V4L2_TYPE_IS_OUTPUT(p->type))
-		s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
-	else
-		s.target = V4L2_SEL_TGT_CROP_BOUNDS;
+		/* obtaining bounds */
+		if (V4L2_TYPE_IS_OUTPUT(p->type))
+			s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
+		else
+			s.target = V4L2_SEL_TGT_CROP_BOUNDS;
 
-	ret = ops->vidioc_g_selection(file, fh, &s);
-	if (ret)
-		return ret;
-	p->bounds = s.r;
+		ret = ops->vidioc_g_selection(file, fh, &s);
+		if (ret)
+			return ret;
+		p->bounds = s.r;
 
-	/* obtaining defrect */
-	if (V4L2_TYPE_IS_OUTPUT(p->type))
-		s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
-	else
-		s.target = V4L2_SEL_TGT_CROP_DEFAULT;
+		/* obtaining defrect */
+		if (V4L2_TYPE_IS_OUTPUT(p->type))
+			s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
+		else
+			s.target = V4L2_SEL_TGT_CROP_DEFAULT;
 
-	ret = ops->vidioc_g_selection(file, fh, &s);
-	if (ret)
-		return ret;
-	p->defrect = s.r;
+		ret = ops->vidioc_g_selection(file, fh, &s);
+		if (ret)
+			return ret;
+		p->defrect = s.r;
+	}
 
 	/* setting trivial pixelaspect */
 	p->pixelaspect.numerator = 1;
 	p->pixelaspect.denominator = 1;
+
+	if (ops->vidioc_cropcap)
+		return ops->vidioc_cropcap(file, fh, p);
+
 	return 0;
 }