[media] coda: add cyclic intra refresh control

Allow userspace to enable cyclic intra refresh by setting the number of
intra macroblocks per frame to a non-zero value.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

diff --git a/drivers/media/platform/coda.c b/drivers/media/platform/coda.c
index e675cd7..43349d9 100644 (file)
--- a/drivers/media/platform/coda.c
+++ b/drivers/media/platform/coda.c
@@ -167,6 +167,7 @@ struct coda_params {
        u8                      mpeg4_intra_qp;
        u8                      mpeg4_inter_qp;
        u8                      gop_size;
+       int                     intra_refresh;
        int                     codec_mode;
        int                     codec_mode_aux;
        enum v4l2_mpeg_video_multi_slice_mode slice_mode;
@@ -2379,7 +2380,8 @@ static int coda_start_encoding(struct coda_ctx *ctx)
        coda_write(dev, value, CODA_CMD_ENC_SEQ_RC_PARA);
 
        coda_write(dev, 0, CODA_CMD_ENC_SEQ_RC_BUF_SIZE);
-       coda_write(dev, 0, CODA_CMD_ENC_SEQ_INTRA_REFRESH);
+       coda_write(dev, ctx->params.intra_refresh,
+                  CODA_CMD_ENC_SEQ_INTRA_REFRESH);
 
        coda_write(dev, bitstream_buf, CODA_CMD_ENC_SEQ_BB_START);
        coda_write(dev, bitstream_size / 1024, CODA_CMD_ENC_SEQ_BB_SIZE);
@@ -2678,6 +2680,9 @@ static int coda_s_ctrl(struct v4l2_ctrl *ctrl)
                break;
        case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
                break;
+       case V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB:
+               ctx->params.intra_refresh = ctrl->val;
+               break;
        default:
                v4l2_dbg(1, coda_debug, &ctx->dev->v4l2_dev,
                        "Invalid control, id=%d, val=%d\n",
@@ -2739,6 +2744,8 @@ static int coda_ctrls_setup(struct coda_ctx *ctx)
                V4L2_MPEG_VIDEO_HEADER_MODE_JOINED_WITH_1ST_FRAME,
                (1 << V4L2_MPEG_VIDEO_HEADER_MODE_SEPARATE),
                V4L2_MPEG_VIDEO_HEADER_MODE_JOINED_WITH_1ST_FRAME);
+       v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
+               V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB, 0, 1920 * 1088 / 256, 1, 0);
 
        if (ctx->ctrls.error) {
                v4l2_err(&ctx->dev->v4l2_dev, "control initialization error (%d)",