[PATCH 5/6] staging: media: rkvdec: Enable S_CTRL IOCTL

[Sebastian Fricke]

Enable user-space to set the SPS of the current byte-stream on the
decoder. This action will trigger the decoder to pick the optimal
pixel-format for the capture queue.

Signed-off-by: Sebastian Fricke <sebastian.fricke@xxxxxxxxxxxxx>
Signed-off-by: Jonas Karlman <jonas@xxxxxxxxx>
---
 drivers/staging/media/rkvdec/rkvdec.c | 60 ++++++++++++++++++++-------
 1 file changed, 46 insertions(+), 14 deletions(-)

diff --git a/drivers/staging/media/rkvdec/rkvdec.c b/drivers/staging/media/rkvdec/rkvdec.c
index 2625e0a736f4..f84579f764ab 100644
--- a/drivers/staging/media/rkvdec/rkvdec.c
+++ b/drivers/staging/media/rkvdec/rkvdec.c
@@ -27,6 +27,17 @@
 #include "rkvdec.h"
 #include "rkvdec-regs.h"
 
+static void rkvdec_fill_decoded_pixfmt(struct rkvdec_ctx *ctx,
+				       struct v4l2_pix_format_mplane *pix_mp)
+{
+	v4l2_fill_pixfmt_mp(pix_mp, pix_mp->pixelformat,
+			    pix_mp->width, pix_mp->height);
+	pix_mp->plane_fmt[0].sizeimage += 128 *
+		DIV_ROUND_UP(pix_mp->width, 16) *
+		DIV_ROUND_UP(pix_mp->height, 16);
+	pix_mp->field = V4L2_FIELD_NONE;
+}
+
 /*
  * Fetch the optimal pixel-format directly from the codec variation. If the
  * valid_fmt callback is not implemented, then the context variable valid_fmt
@@ -44,6 +55,27 @@ static int rkvdec_get_valid_fmt(struct rkvdec_ctx *ctx, struct v4l2_ctrl *ctrl)
 	return 0;
 }
 
+static int rkvdec_set_valid_fmt(struct rkvdec_ctx *ctx, struct v4l2_ctrl *ctrl)
+{
+	struct v4l2_pix_format_mplane *pix_mp;
+
+	switch (ctrl->id) {
+	case V4L2_CID_STATELESS_H264_SPS:
+	case V4L2_CID_STATELESS_VP9_FRAME:
+	case V4L2_CID_STATELESS_HEVC_SPS:
+		ctx->valid_fmt = rkvdec_get_valid_fmt(ctx, ctrl);
+
+		pix_mp = &ctx->decoded_fmt.fmt.pix_mp;
+		pix_mp->pixelformat = ctx->valid_fmt;
+		rkvdec_fill_decoded_pixfmt(ctx, pix_mp);
+		break;
+	default:
+		dev_err(ctx->dev->dev, "Unsupported stateless control ID: %x\n", ctrl->id);
+		return -EINVAL;
+	};
+	return 0;
+}
+
 static int rkvdec_try_ctrl(struct v4l2_ctrl *ctrl)
 {
 	struct rkvdec_ctx *ctx = container_of(ctrl->handler, struct rkvdec_ctx, ctrl_hdl);
@@ -58,8 +90,18 @@ static int rkvdec_try_ctrl(struct v4l2_ctrl *ctrl)
 	return 0;
 }
 
+static int rkvdec_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct rkvdec_ctx *ctx = container_of(ctrl->handler, struct rkvdec_ctx, ctrl_hdl);
+
+	if (!ctx->valid_fmt)
+		return rkvdec_set_valid_fmt(ctx, ctrl);
+	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[] = {
@@ -213,13 +255,9 @@ static void rkvdec_reset_decoded_fmt(struct rkvdec_ctx *ctx)
 	ctx->valid_fmt = 0;
 	rkvdec_reset_fmt(ctx, f, ctx->coded_fmt_desc->decoded_fmts[0]);
 	f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
-	v4l2_fill_pixfmt_mp(&f->fmt.pix_mp,
-			    ctx->coded_fmt_desc->decoded_fmts[0],
-			    ctx->coded_fmt.fmt.pix_mp.width,
-			    ctx->coded_fmt.fmt.pix_mp.height);
-	f->fmt.pix_mp.plane_fmt[0].sizeimage += 128 *
-		DIV_ROUND_UP(f->fmt.pix_mp.width, 16) *
-		DIV_ROUND_UP(f->fmt.pix_mp.height, 16);
+	f->fmt.pix_mp.width = ctx->coded_fmt.fmt.pix_mp.width;
+	f->fmt.pix_mp.height = ctx->coded_fmt.fmt.pix_mp.height;
+	rkvdec_fill_decoded_pixfmt(ctx, &f->fmt.pix_mp);
 }
 
 static int rkvdec_enum_framesizes(struct file *file, void *priv,
@@ -288,13 +326,7 @@ static int rkvdec_try_capture_fmt(struct file *file, void *priv,
 				       &pix_mp->height,
 				       &coded_desc->frmsize);
 
-	v4l2_fill_pixfmt_mp(pix_mp, pix_mp->pixelformat,
-			    pix_mp->width, pix_mp->height);
-	pix_mp->plane_fmt[0].sizeimage +=
-		128 *
-		DIV_ROUND_UP(pix_mp->width, 16) *
-		DIV_ROUND_UP(pix_mp->height, 16);
-	pix_mp->field = V4L2_FIELD_NONE;
+	rkvdec_fill_decoded_pixfmt(ctx, pix_mp);
 
 	return 0;
 }
-- 
2.25.1