media: i2c: Add .get_selection() support to ov8865

The ov8865 driver's v4l2_subdev_pad_ops currently does not include
.get_selection() - add support for that callback.
Signed-off-by: Daniel Scally <djrscally@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/i2c/ov8865.c

@@ -450,6 +450,15 @@
 #define OV8865_PRE_CTRL0_PATTERN_COLOR_SQUARES	2
 #define OV8865_PRE_CTRL0_PATTERN_BLACK		3
 
+/* Pixel Array */
+
+#define OV8865_NATIVE_WIDTH			3296
+#define OV8865_NATIVE_HEIGHT			2528
+#define OV8865_ACTIVE_START_TOP			32
+#define OV8865_ACTIVE_START_LEFT		80
+#define OV8865_ACTIVE_WIDTH			3264
+#define OV8865_ACTIVE_HEIGHT			2448
+
 /* Macros */
 
 #define ov8865_subdev_sensor(s) \
@@ -2756,12 +2765,67 @@ static int ov8865_enum_frame_interval(struct v4l2_subdev *subdev,
 	return 0;
 }
 
+static void
+__ov8865_get_pad_crop(struct ov8865_sensor *sensor,
+		      struct v4l2_subdev_state *state, unsigned int pad,
+		      enum v4l2_subdev_format_whence which, struct v4l2_rect *r)
+{
+	const struct ov8865_mode *mode = sensor->state.mode;
+
+	switch (which) {
+	case V4L2_SUBDEV_FORMAT_TRY:
+		*r = *v4l2_subdev_get_try_crop(&sensor->subdev, state, pad);
+		break;
+	case V4L2_SUBDEV_FORMAT_ACTIVE:
+		r->height = mode->output_size_y;
+		r->width = mode->output_size_x;
+		r->top = (OV8865_NATIVE_HEIGHT - mode->output_size_y) / 2;
+		r->left = (OV8865_NATIVE_WIDTH - mode->output_size_x) / 2;
+		break;
+	}
+}
+
+static int ov8865_get_selection(struct v4l2_subdev *subdev,
+				struct v4l2_subdev_state *state,
+				struct v4l2_subdev_selection *sel)
+{
+	struct ov8865_sensor *sensor = ov8865_subdev_sensor(subdev);
+
+	switch (sel->target) {
+	case V4L2_SEL_TGT_CROP:
+		mutex_lock(&sensor->mutex);
+			__ov8865_get_pad_crop(sensor, state, sel->pad,
+					      sel->which, &sel->r);
+		mutex_unlock(&sensor->mutex);
+		break;
+	case V4L2_SEL_TGT_NATIVE_SIZE:
+		sel->r.top = 0;
+		sel->r.left = 0;
+		sel->r.width = OV8865_NATIVE_WIDTH;
+		sel->r.height = OV8865_NATIVE_HEIGHT;
+		break;
+	case V4L2_SEL_TGT_CROP_BOUNDS:
+	case V4L2_SEL_TGT_CROP_DEFAULT:
+		sel->r.top = OV8865_ACTIVE_START_TOP;
+		sel->r.left = OV8865_ACTIVE_START_LEFT;
+		sel->r.width = OV8865_ACTIVE_WIDTH;
+		sel->r.height = OV8865_ACTIVE_HEIGHT;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
 static const struct v4l2_subdev_pad_ops ov8865_subdev_pad_ops = {
 	.enum_mbus_code		= ov8865_enum_mbus_code,
 	.get_fmt		= ov8865_get_fmt,
 	.set_fmt		= ov8865_set_fmt,
 	.enum_frame_size	= ov8865_enum_frame_size,
 	.enum_frame_interval	= ov8865_enum_frame_interval,
+	.get_selection		= ov8865_get_selection,
+	.set_selection		= ov8865_get_selection,
 };
 
 static const struct v4l2_subdev_ops ov8865_subdev_ops = {