[PATCH v6 09/11] media: rkvdec: Add get_image_fmt ops

[Jonas Karlman]

Add support for a get_image_fmt() ops that return the required image
format.

The CAPTURE format is reset when required image format changes and the
buffer queue is not busy.

Signed-off-by: Jonas Karlman <jonas at kwiboo.se>
Tested-by: Nicolas Dufresne <nicolas.dufresne at collabora.com>
Tested-by: Christopher Obbard <chris.obbard at collabora.com>
---
v6:
- No change

v5:
- Collect t-b tags

v4:
- Change fmt_opaque into an image format
- Split patch into two

v3:
- New patch
---
 drivers/staging/media/rkvdec/rkvdec.c | 49 +++++++++++++++++++++++++--
 drivers/staging/media/rkvdec/rkvdec.h |  2 ++
 2 files changed, 49 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/media/rkvdec/rkvdec.c b/drivers/staging/media/rkvdec/rkvdec.c
index 467fc05b347a..8df49ee12820 100644
--- a/drivers/staging/media/rkvdec/rkvdec.c
+++ b/drivers/staging/media/rkvdec/rkvdec.c
@@ -111,15 +111,60 @@ static int rkvdec_try_ctrl(struct v4l2_ctrl *ctrl)
 {
 	struct rkvdec_ctx *ctx = container_of(ctrl->handler, struct rkvdec_ctx, ctrl_hdl);
 	const struct rkvdec_coded_fmt_desc *desc = ctx->coded_fmt_desc;
+	struct v4l2_pix_format_mplane *pix_mp = &ctx->decoded_fmt.fmt.pix_mp;
+	enum rkvdec_image_fmt image_fmt;
+	struct vb2_queue *vq;
+	int ret;
+
+	if (desc->ops->try_ctrl) {
+		ret = desc->ops->try_ctrl(ctx, ctrl);
+		if (ret)
+			return ret;
+	}
+
+	if (!desc->ops->get_image_fmt)
+		return 0;
 
-	if (desc->ops->try_ctrl)
-		return desc->ops->try_ctrl(ctx, ctrl);
+	image_fmt = desc->ops->get_image_fmt(ctx, ctrl);
+	if (ctx->image_fmt == image_fmt)
+		return 0;
+
+	if (rkvdec_is_valid_fmt(ctx, pix_mp->pixelformat, image_fmt))
+		return 0;
+
+	/* format change not allowed when queue is busy */
+	vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx,
+			     V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE);
+	if (vb2_is_busy(vq))
+		return -EINVAL;
+
+	return 0;
+}
+
+static int rkvdec_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct rkvdec_ctx *ctx = container_of(ctrl->handler, struct rkvdec_ctx, ctrl_hdl);
+	const struct rkvdec_coded_fmt_desc *desc = ctx->coded_fmt_desc;
+	struct v4l2_pix_format_mplane *pix_mp = &ctx->decoded_fmt.fmt.pix_mp;
+	enum rkvdec_image_fmt image_fmt;
+
+	if (!desc->ops->get_image_fmt)
+		return 0;
+
+	image_fmt = desc->ops->get_image_fmt(ctx, ctrl);
+	if (ctx->image_fmt == image_fmt)
+		return 0;
+
+	ctx->image_fmt = image_fmt;
+	if (!rkvdec_is_valid_fmt(ctx, pix_mp->pixelformat, ctx->image_fmt))
+		rkvdec_reset_decoded_fmt(ctx);
 
 	return 0;
 }
 
 static const struct v4l2_ctrl_ops rkvdec_ctrl_ops = {
 	.try_ctrl = rkvdec_try_ctrl,
+	.s_ctrl = rkvdec_s_ctrl,
 };
 
 static const struct rkvdec_ctrl_desc rkvdec_h264_ctrl_descs[] = {
diff --git a/drivers/staging/media/rkvdec/rkvdec.h b/drivers/staging/media/rkvdec/rkvdec.h
index 6f8cf50c5d99..e466a2753ccf 100644
--- a/drivers/staging/media/rkvdec/rkvdec.h
+++ b/drivers/staging/media/rkvdec/rkvdec.h
@@ -73,6 +73,8 @@ struct rkvdec_coded_fmt_ops {
 		     struct vb2_v4l2_buffer *dst_buf,
 		     enum vb2_buffer_state result);
 	int (*try_ctrl)(struct rkvdec_ctx *ctx, struct v4l2_ctrl *ctrl);
+	enum rkvdec_image_fmt (*get_image_fmt)(struct rkvdec_ctx *ctx,
+					       struct v4l2_ctrl *ctrl);
 };
 
 enum rkvdec_image_fmt {
-- 
2.46.0