media: rkisp1: Implement ENUM_FRAMESIZES

Implement VIDIOC_ENUM_FRAMESIZES for the rkisp1 capture devices.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Dafna Hirschfeld <dafna@fastmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c

@@ -1234,6 +1234,35 @@ static int rkisp1_enum_fmt_vid_cap_mplane(struct file *file, void *priv,
 	return -EINVAL;
 }
 
+static int rkisp1_enum_framesizes(struct file *file, void *fh,
+				  struct v4l2_frmsizeenum *fsize)
+{
+	static const unsigned int max_widths[] = {
+		RKISP1_RSZ_MP_SRC_MAX_WIDTH,
+		RKISP1_RSZ_SP_SRC_MAX_WIDTH,
+	};
+	static const unsigned int max_heights[] = {
+		RKISP1_RSZ_MP_SRC_MAX_HEIGHT,
+		RKISP1_RSZ_SP_SRC_MAX_HEIGHT,
+	};
+	struct rkisp1_capture *cap = video_drvdata(file);
+
+	if (fsize->index != 0)
+		return -EINVAL;
+
+	fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
+
+	fsize->stepwise.min_width = RKISP1_RSZ_SRC_MIN_WIDTH;
+	fsize->stepwise.max_width = max_widths[cap->id];
+	fsize->stepwise.step_width = 2;
+
+	fsize->stepwise.min_height = RKISP1_RSZ_SRC_MIN_HEIGHT;
+	fsize->stepwise.max_height = max_heights[cap->id];
+	fsize->stepwise.step_height = 2;
+
+	return 0;
+}
+
 static int rkisp1_s_fmt_vid_cap_mplane(struct file *file,
 				       void *priv, struct v4l2_format *f)
 {
@@ -1283,6 +1312,7 @@ static const struct v4l2_ioctl_ops rkisp1_v4l2_ioctl_ops = {
 	.vidioc_s_fmt_vid_cap_mplane = rkisp1_s_fmt_vid_cap_mplane,
 	.vidioc_g_fmt_vid_cap_mplane = rkisp1_g_fmt_vid_cap_mplane,
 	.vidioc_enum_fmt_vid_cap = rkisp1_enum_fmt_vid_cap_mplane,
+	.vidioc_enum_framesizes = rkisp1_enum_framesizes,
 	.vidioc_querycap = rkisp1_querycap,
 	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
 	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,