[PATCH 3/9] media: rkvdec: h264: Fix pic width and height in mbs

[Jonas Karlman]

The width and height in mbs is currently configured based on OUTPUT buffer
resolution, this works for frame pictures but can cause issues for field
pictures or when frmsize step_width is changed to support 10-bit decoding.

When frame_mbs_only_flag is 0 the height in mbs should be height of
the field instead of height of frame.

Validate pic_width_in_mbs_minus1 and pic_height_in_map_units_minus1
against CAPTURE buffer resolution and use these values to configure HW.

Signed-off-by: Jonas Karlman <jonas at kwiboo.se>
---
 drivers/staging/media/rkvdec/rkvdec-h264.c | 44 +++++++++++++++++++---
 1 file changed, 39 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/media/rkvdec/rkvdec-h264.c b/drivers/staging/media/rkvdec/rkvdec-h264.c
index f0cfed84d60d..c9aebeb8f9b3 100644
--- a/drivers/staging/media/rkvdec/rkvdec-h264.c
+++ b/drivers/staging/media/rkvdec/rkvdec-h264.c
@@ -672,8 +672,8 @@ static void assemble_hw_pps(struct rkvdec_ctx *ctx,
 		  LOG2_MAX_PIC_ORDER_CNT_LSB_MINUS4);
 	WRITE_PPS(!!(sps->flags & V4L2_H264_SPS_FLAG_DELTA_PIC_ORDER_ALWAYS_ZERO),
 		  DELTA_PIC_ORDER_ALWAYS_ZERO_FLAG);
-	WRITE_PPS(DIV_ROUND_UP(ctx->coded_fmt.fmt.pix_mp.width, 16), PIC_WIDTH_IN_MBS);
-	WRITE_PPS(DIV_ROUND_UP(ctx->coded_fmt.fmt.pix_mp.height, 16), PIC_HEIGHT_IN_MBS);
+	WRITE_PPS(sps->pic_width_in_mbs_minus1 + 1, PIC_WIDTH_IN_MBS);
+	WRITE_PPS(sps->pic_height_in_map_units_minus1 + 1, PIC_HEIGHT_IN_MBS);
 	WRITE_PPS(!!(sps->flags & V4L2_H264_SPS_FLAG_FRAME_MBS_ONLY),
 		  FRAME_MBS_ONLY_FLAG);
 	WRITE_PPS(!!(sps->flags & V4L2_H264_SPS_FLAG_MB_ADAPTIVE_FRAME_FIELD),
@@ -1058,10 +1058,33 @@ static void rkvdec_h264_stop(struct rkvdec_ctx *ctx)
 	kfree(h264_ctx);
 }
 
-static void rkvdec_h264_run_preamble(struct rkvdec_ctx *ctx,
-				     struct rkvdec_h264_run *run)
+static int validate_sps(struct rkvdec_ctx *ctx,
+			const struct v4l2_ctrl_h264_sps *sps)
+{
+	unsigned int width, height;
+
+	if (WARN_ON(!sps))
+		return -EINVAL;
+
+	width = (sps->pic_width_in_mbs_minus1 + 1) * 16;
+	height = (sps->pic_height_in_map_units_minus1 + 1) * 16;
+
+	if (width > ctx->decoded_fmt.fmt.pix_mp.width ||
+	    height > ctx->decoded_fmt.fmt.pix_mp.height) {
+		dev_err(ctx->dev->dev,
+			"unexpected bitstream resolution %ux%u\n",
+			width, height);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int rkvdec_h264_run_preamble(struct rkvdec_ctx *ctx,
+				    struct rkvdec_h264_run *run)
 {
 	struct v4l2_ctrl *ctrl;
+	int ret;
 
 	ctrl = v4l2_ctrl_find(&ctx->ctrl_hdl,
 			      V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS);
@@ -1080,6 +1103,12 @@ static void rkvdec_h264_run_preamble(struct rkvdec_ctx *ctx,
 	run->scaling_matrix = ctrl ? ctrl->p_cur.p : NULL;
 
 	rkvdec_run_preamble(ctx, &run->base);
+
+	ret = validate_sps(ctx, run->sps);
+	if (ret)
+		return ret;
+
+	return 0;
 }
 
 static int rkvdec_h264_run(struct rkvdec_ctx *ctx)
@@ -1088,8 +1117,13 @@ static int rkvdec_h264_run(struct rkvdec_ctx *ctx)
 	struct rkvdec_dev *rkvdec = ctx->dev;
 	struct rkvdec_h264_ctx *h264_ctx = ctx->priv;
 	struct rkvdec_h264_run run;
+	int ret;
 
-	rkvdec_h264_run_preamble(ctx, &run);
+	ret = rkvdec_h264_run_preamble(ctx, &run);
+	if (ret) {
+		rkvdec_run_postamble(ctx, &run.base);
+		return ret;
+	}
 
 	/* Build the P/B{0,1} ref lists. */
 	v4l2_h264_init_reflist_builder(&reflist_builder, run.decode_params,
-- 
2.17.1