media: tegra-video: Use zero crop settings if subdev has no get_selection

Currently try format implementation doesn't check if subdevice has
get_selection ops implemented and returns -EINVAL on error from
direct v4l2_subdev_call of get_selection.

Selection API's are not mandatory for all V4L2 subdevices.

This patch fixes it by adding v4l2_subdev_has_ops check prior to
calling get_selection ops and continues with try or set format with
zero crop settings for subdevices that don't have get_selection and
returns -EINVAL only for subdevices that has get_selection ops.
Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/tegra-video/vi.c

@@ -533,11 +533,18 @@ static int __tegra_channel_try_format(struct tegra_vi_channel *chan,
 	fse.code = fmtinfo->code;
 	ret = v4l2_subdev_call(subdev, pad, enum_frame_size, pad_cfg, &fse);
 	if (ret) {
-		ret = v4l2_subdev_call(subdev, pad, get_selection, NULL, &sdsel);
-		if (ret)
-			return -EINVAL;
-		pad_cfg->try_crop.width = sdsel.r.width;
-		pad_cfg->try_crop.height = sdsel.r.height;
+		if (!v4l2_subdev_has_op(subdev, pad, get_selection)) {
+			pad_cfg->try_crop.width = 0;
+			pad_cfg->try_crop.height = 0;
+		} else {
+			ret = v4l2_subdev_call(subdev, pad, get_selection,
+					       NULL, &sdsel);
+			if (ret)
+				return -EINVAL;
+
+			pad_cfg->try_crop.width = sdsel.r.width;
+			pad_cfg->try_crop.height = sdsel.r.height;
+		}
 	} else {
 		pad_cfg->try_crop.width = fse.max_width;
 		pad_cfg->try_crop.height = fse.max_height;