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SubjectRe: [PATCH v3] media: staging/imx: fill vb2_v4l2_buffer sequence entry
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Hi Peter,


On 03/14/2018 09:51 AM, Peter Seiderer wrote:
> Enables gstreamer v4l2src lost frame detection, e.g:
>
> 0:00:08.685185668 348 0x54f520 WARN v4l2src gstv4l2src.c:970:gst_v4l2src_create:<v4l2src0> lost frames detected: count = 141 - ts: 0:00:08.330177332
>
> Signed-off-by: Peter Seiderer <ps.report@gmx.net>
> ---
> Changes in v2:
> - fill vb2_v4l2_buffer sequence entry in imx-ic-prpencvf too
> (suggested by Steve Longerbeam)
>
> Changes in v3:
> - add changelog (suggested by Greg Kroah-Hartman, Fabio Estevam
> and Dan Carpenter) and patch history
> - use u32 (instead of __u32) (suggested by Dan Carpenter)
> - let sequence counter start with zero,

There's no need to initialize (unsigned) priv->frame_sequence to -1. Just
increment it _after_ the "if (done) {...}" block instead of before.

Steve

> keeping v4l2-compliance
> testing happy (needs additional setting of field to a valid
> value, patch will follow soon)
> ---
> drivers/staging/media/imx/imx-ic-prpencvf.c | 5 +++++
> drivers/staging/media/imx/imx-media-csi.c | 5 +++++
> 2 files changed, 10 insertions(+)
>
> diff --git a/drivers/staging/media/imx/imx-ic-prpencvf.c b/drivers/staging/media/imx/imx-ic-prpencvf.c
> index ae453fd422f0..274683d2d4ba 100644
> --- a/drivers/staging/media/imx/imx-ic-prpencvf.c
> +++ b/drivers/staging/media/imx/imx-ic-prpencvf.c
> @@ -103,6 +103,7 @@ struct prp_priv {
> int nfb4eof_irq;
>
> int stream_count;
> + u32 frame_sequence; /* frame sequence counter */
> bool last_eof; /* waiting for last EOF at stream off */
> bool nfb4eof; /* NFB4EOF encountered during streaming */
> struct completion last_eof_comp;
> @@ -208,8 +209,11 @@ static void prp_vb2_buf_done(struct prp_priv *priv, struct ipuv3_channel *ch)
> struct vb2_buffer *vb;
> dma_addr_t phys;
>
> + priv->frame_sequence++;
> +
> done = priv->active_vb2_buf[priv->ipu_buf_num];
> if (done) {
> + done->vbuf.sequence = priv->frame_sequence;
> vb = &done->vbuf.vb2_buf;
> vb->timestamp = ktime_get_ns();
> vb2_buffer_done(vb, priv->nfb4eof ?
> @@ -637,6 +641,7 @@ static int prp_start(struct prp_priv *priv)
>
> /* init EOF completion waitq */
> init_completion(&priv->last_eof_comp);
> + priv->frame_sequence = -1;
> priv->last_eof = false;
> priv->nfb4eof = false;
>
> diff --git a/drivers/staging/media/imx/imx-media-csi.c b/drivers/staging/media/imx/imx-media-csi.c
> index 5a195f80a24d..161a92946a86 100644
> --- a/drivers/staging/media/imx/imx-media-csi.c
> +++ b/drivers/staging/media/imx/imx-media-csi.c
> @@ -111,6 +111,7 @@ struct csi_priv {
> struct v4l2_ctrl_handler ctrl_hdlr;
>
> int stream_count; /* streaming counter */
> + u32 frame_sequence; /* frame sequence counter */
> bool last_eof; /* waiting for last EOF at stream off */
> bool nfb4eof; /* NFB4EOF encountered during streaming */
> struct completion last_eof_comp;
> @@ -234,8 +235,11 @@ static void csi_vb2_buf_done(struct csi_priv *priv)
> struct vb2_buffer *vb;
> dma_addr_t phys;
>
> + priv->frame_sequence++;
> +
> done = priv->active_vb2_buf[priv->ipu_buf_num];
> if (done) {
> + done->vbuf.sequence = priv->frame_sequence;
> vb = &done->vbuf.vb2_buf;
> vb->timestamp = ktime_get_ns();
> vb2_buffer_done(vb, priv->nfb4eof ?
> @@ -543,6 +547,7 @@ static int csi_idmac_start(struct csi_priv *priv)
>
> /* init EOF completion waitq */
> init_completion(&priv->last_eof_comp);
> + priv->frame_sequence = -1;
> priv->last_eof = false;
> priv->nfb4eof = false;
>

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