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Subject[PATCH v4 2/2] media: staging/imx: fill vb2_v4l2_buffer sequence entry
Date
- 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

- fixes v4l2-compliance test failure:

Streaming ioctls:
test read/write: OK (Not Supported)
Video Capture:
Buffer: 0 Sequence: 0 Field: None Timestamp: 92.991450s
Buffer: 1 Sequence: 0 Field: None Timestamp: 93.008135s
fail: v4l2-test-buffers.cpp(294): (int)g_sequence() < seq.last_seq + 1
fail: v4l2-test-buffers.cpp(707): buf.check(q, last_seq)

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, keeping v4l2-compliance
testing happy (needs additional setting of field to a valid
value, patch will follow soon)

Changes in v4:
- add v4l2-compliance test failure to changelog
- reorder frame_sequence increment and assignement to
avoid -1 as start value (suggeted by Steve Longerbeam)
---
drivers/staging/media/imx/imx-ic-prpencvf.c | 4 ++++
drivers/staging/media/imx/imx-media-csi.c | 4 ++++
2 files changed, 8 insertions(+)

diff --git a/drivers/staging/media/imx/imx-ic-prpencvf.c b/drivers/staging/media/imx/imx-ic-prpencvf.c
index ffeb017c73b2..28f41caba05d 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;
@@ -211,12 +212,14 @@ static void prp_vb2_buf_done(struct prp_priv *priv, struct ipuv3_channel *ch)
done = priv->active_vb2_buf[priv->ipu_buf_num];
if (done) {
done->vbuf.field = vdev->fmt.fmt.pix.field;
+ done->vbuf.sequence = priv->frame_sequence;
vb = &done->vbuf.vb2_buf;
vb->timestamp = ktime_get_ns();
vb2_buffer_done(vb, priv->nfb4eof ?
VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
}

+ priv->frame_sequence++;
priv->nfb4eof = false;

/* get next queued buffer */
@@ -638,6 +641,7 @@ static int prp_start(struct prp_priv *priv)

/* init EOF completion waitq */
init_completion(&priv->last_eof_comp);
+ priv->frame_sequence = 0;
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 5f69117b5811..3f2ce05848f3 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;
@@ -237,12 +238,14 @@ static void csi_vb2_buf_done(struct csi_priv *priv)
done = priv->active_vb2_buf[priv->ipu_buf_num];
if (done) {
done->vbuf.field = vdev->fmt.fmt.pix.field;
+ done->vbuf.sequence = priv->frame_sequence;
vb = &done->vbuf.vb2_buf;
vb->timestamp = ktime_get_ns();
vb2_buffer_done(vb, priv->nfb4eof ?
VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
}

+ priv->frame_sequence++;
priv->nfb4eof = false;

/* get next queued buffer */
@@ -544,6 +547,7 @@ static int csi_idmac_start(struct csi_priv *priv)

/* init EOF completion waitq */
init_completion(&priv->last_eof_comp);
+ priv->frame_sequence = 0;
priv->last_eof = false;
priv->nfb4eof = false;

--
2.16.2
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