[PATCH 00/15] media: blackfin: bfin_capture enhancements

[PATCH 00/15] media: blackfin: bfin_capture enhancements

[Lad, Prabhakar]

Hi Scott,

Although I was on holiday but couldn't resist myself from working,
since I was away from my hardware I had to choose a different one,
blackfin driver was lucky one. Since I don't have the blackfin
board I haven't tested them on the actual board, but just compile
tested, Can you please test it & ACK.

Lad, Prabhakar (15):
  media: blackfin: bfin_capture: drop buf_init() callback
  media: blackfin: bfin_capture: release buffers in case
    start_streaming() call back fails
  media: blackfin: bfin_capture: set min_buffers_needed
  media: blackfin: bfin_capture: improve buf_prepare() callback
  media: blackfin: bfin_capture: improve queue_setup() callback
  media: blackfin: bfin_capture: use vb2_fop_mmap/poll
  media: blackfin: bfin_capture: use v4l2_fh_open and vb2_fop_release
  media: blackfin: bfin_capture: use vb2_ioctl_* helpers
  media: blackfin: bfin_capture: make sure all buffers are returned on
    stop_streaming() callback
  media: blackfin: bfin_capture: return -ENODATA for *std calls
  media: blackfin: bfin_capture: return -ENODATA for *dv_timings calls
  media: blackfin: bfin_capture: add support for vidioc_create_bufs
  media: blackfin: bfin_capture: add support for VB2_DMABUF
  media: blackfin: bfin_capture: add support for VIDIOC_EXPBUF
  media: blackfin: bfin_capture: set v4l2 buffer sequence

 drivers/media/platform/blackfin/bfin_capture.c | 310 ++++++++-----------------
 1 file changed, 98 insertions(+), 212 deletions(-)

-- 
1.9.1

[PATCH 01/15] media: blackfin: bfin_capture: drop buf_init() callback

[Lad, Prabhakar]

this patch drops the buf_init() callback as init
of buf list is not required.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
---
 drivers/media/platform/blackfin/bfin_capture.c | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/drivers/media/platform/blackfin/bfin_capture.c b/drivers/media/platform/blackfin/bfin_capture.c
index 3112844..d4eeae9 100644
--- a/drivers/media/platform/blackfin/bfin_capture.c
+++ b/drivers/media/platform/blackfin/bfin_capture.c
@@ -302,14 +302,6 @@ static int bcap_queue_setup(struct vb2_queue *vq,
 	return 0;
 }
 
-static int bcap_buffer_init(struct vb2_buffer *vb)
-{
-	struct bcap_buffer *buf = to_bcap_vb(vb);
-
-	INIT_LIST_HEAD(&buf->list);
-	return 0;
-}
-
 static int bcap_buffer_prepare(struct vb2_buffer *vb)
 {
 	struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
@@ -441,7 +433,6 @@ static void bcap_stop_streaming(struct vb2_queue *vq)
 
 static struct vb2_ops bcap_video_qops = {
 	.queue_setup            = bcap_queue_setup,
-	.buf_init               = bcap_buffer_init,
 	.buf_prepare            = bcap_buffer_prepare,
 	.buf_cleanup            = bcap_buffer_cleanup,
 	.buf_queue              = bcap_buffer_queue,
-- 
1.9.1

[PATCH 02/15] media: blackfin: bfin_capture: release buffers in case start_streaming() call back fails

[Lad, Prabhakar]

this patch adds support to release the buffer by calling
vb2_buffer_done(), with state marked as VB2_BUF_STATE_QUEUED
if start_streaming() call back fails.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
---
 drivers/media/platform/blackfin/bfin_capture.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/drivers/media/platform/blackfin/bfin_capture.c b/drivers/media/platform/blackfin/bfin_capture.c
index d4eeae9..80463fa 100644
--- a/drivers/media/platform/blackfin/bfin_capture.c
+++ b/drivers/media/platform/blackfin/bfin_capture.c
@@ -345,6 +345,7 @@ static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
 {
 	struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 	struct ppi_if *ppi = bcap_dev->ppi;
+	struct bcap_buffer *buf, *tmp;
 	struct ppi_params params;
 	int ret;
 
@@ -352,7 +353,7 @@ static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
 	ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 1);
 	if (ret && (ret != -ENOIOCTLCMD)) {
 		v4l2_err(&bcap_dev->v4l2_dev, "stream on failed in subdev\n");
-		return ret;
+		goto err;
 	}
 
 	/* set ppi params */
@@ -391,7 +392,7 @@ static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
 	if (ret < 0) {
 		v4l2_err(&bcap_dev->v4l2_dev,
 				"Error in setting ppi params\n");
-		return ret;
+		goto err;
 	}
 
 	/* attach ppi DMA irq handler */
@@ -399,12 +400,21 @@ static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
 	if (ret < 0) {
 		v4l2_err(&bcap_dev->v4l2_dev,
 				"Error in attaching interrupt handler\n");
-		return ret;
+		goto err;
 	}
 
 	reinit_completion(&bcap_dev->comp);
 	bcap_dev->stop = false;
+
 	return 0;
+
+err:
+	list_for_each_entry_safe(buf, tmp, &bcap_dev->dma_queue, list) {
+		list_del(&buf->list);
+		vb2_buffer_done(&buf->vb, VB2_BUF_STATE_QUEUED);
+	}
+
+	return ret;
 }
 
 static void bcap_stop_streaming(struct vb2_queue *vq)
-- 
1.9.1

[PATCH 03/15] media: blackfin: bfin_capture: set min_buffers_needed

[Lad, Prabhakar]

this patch sets the min_buffers_needed field of the vb2 queue
so that the vb2 core will make sure start_streaming() callback
is called only when we have minimum buffers queued.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
---
 drivers/media/platform/blackfin/bfin_capture.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/media/platform/blackfin/bfin_capture.c b/drivers/media/platform/blackfin/bfin_capture.c
index 80463fa..a997eac 100644
--- a/drivers/media/platform/blackfin/bfin_capture.c
+++ b/drivers/media/platform/blackfin/bfin_capture.c
@@ -986,6 +986,7 @@ static int bcap_probe(struct platform_device *pdev)
 	q->mem_ops = &vb2_dma_contig_memops;
 	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 	q->lock = &bcap_dev->mutex;
+	q->min_buffers_needed = 1;
 
 	ret = vb2_queue_init(q);
 	if (ret)
-- 
1.9.1

[PATCH 04/15] media: blackfin: bfin_capture: improve buf_prepare() callback

[Lad, Prabhakar]

this patch improves the buf_prepare() callback.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
---
 drivers/media/platform/blackfin/bfin_capture.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/media/platform/blackfin/bfin_capture.c b/drivers/media/platform/blackfin/bfin_capture.c
index a997eac..8bd94a1 100644
--- a/drivers/media/platform/blackfin/bfin_capture.c
+++ b/drivers/media/platform/blackfin/bfin_capture.c
@@ -305,16 +305,12 @@ static int bcap_queue_setup(struct vb2_queue *vq,
 static int bcap_buffer_prepare(struct vb2_buffer *vb)
 {
 	struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
-	struct bcap_buffer *buf = to_bcap_vb(vb);
-	unsigned long size;
 
-	size = bcap_dev->fmt.sizeimage;
-	if (vb2_plane_size(vb, 0) < size) {
-		v4l2_err(&bcap_dev->v4l2_dev, "buffer too small (%lu < %lu)\n",
-				vb2_plane_size(vb, 0), size);
+	vb2_set_plane_payload(vb, 0, bcap_dev->fmt.sizeimage);
+	if (vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0))
 		return -EINVAL;
-	}
-	vb2_set_plane_payload(&buf->vb, 0, size);
+
+	vb->v4l2_buf.field = bcap_dev->fmt.field;
 
 	return 0;
 }
-- 
1.9.1

[PATCH 05/15] media: blackfin: bfin_capture: improve queue_setup() callback

[Lad, Prabhakar]

this patch improves the queue_setup() callback.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
---
 drivers/media/platform/blackfin/bfin_capture.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/media/platform/blackfin/bfin_capture.c b/drivers/media/platform/blackfin/bfin_capture.c
index 8bd94a1..76d42bb 100644
--- a/drivers/media/platform/blackfin/bfin_capture.c
+++ b/drivers/media/platform/blackfin/bfin_capture.c
@@ -44,7 +44,6 @@
 #include <media/blackfin/ppi.h>
 
 #define CAPTURE_DRV_NAME        "bfin_capture"
-#define BCAP_MIN_NUM_BUF        2
 
 struct bcap_format {
 	char *desc;
@@ -292,11 +291,14 @@ static int bcap_queue_setup(struct vb2_queue *vq,
 {
 	struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 
-	if (*nbuffers < BCAP_MIN_NUM_BUF)
-		*nbuffers = BCAP_MIN_NUM_BUF;
+	if (fmt && fmt->fmt.pix.sizeimage < bcap_dev->fmt.sizeimage)
+		return -EINVAL;
+
+	if (vq->num_buffers + *nbuffers < 3)
+		*nbuffers = 3 - vq->num_buffers;
 
 	*nplanes = 1;
-	sizes[0] = bcap_dev->fmt.sizeimage;
+	sizes[0] = fmt ? fmt->fmt.pix.sizeimage : bcap_dev->fmt.sizeimage;
 	alloc_ctxs[0] = bcap_dev->alloc_ctx;
 
 	return 0;
-- 
1.9.1

[PATCH 06/15] media: blackfin: bfin_capture: use vb2_fop_mmap/poll

[Lad, Prabhakar]

No need to reinvent the wheel. Just use the already existing
functions provided by vb2.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
---
 drivers/media/platform/blackfin/bfin_capture.c | 28 +++-----------------------
 1 file changed, 3 insertions(+), 25 deletions(-)

diff --git a/drivers/media/platform/blackfin/bfin_capture.c b/drivers/media/platform/blackfin/bfin_capture.c
index 76d42bb..df4a6b4 100644
--- a/drivers/media/platform/blackfin/bfin_capture.c
+++ b/drivers/media/platform/blackfin/bfin_capture.c
@@ -244,18 +244,6 @@ static int bcap_release(struct file *file)
 	return 0;
 }
 
-static int bcap_mmap(struct file *file, struct vm_area_struct *vma)
-{
-	struct bcap_device *bcap_dev = video_drvdata(file);
-	int ret;
-
-	if (mutex_lock_interruptible(&bcap_dev->mutex))
-		return -ERESTARTSYS;
-	ret = vb2_mmap(&bcap_dev->buffer_queue, vma);
-	mutex_unlock(&bcap_dev->mutex);
-	return ret;
-}
-
 #ifndef CONFIG_MMU
 static unsigned long bcap_get_unmapped_area(struct file *file,
 					    unsigned long addr,
@@ -273,17 +261,6 @@ static unsigned long bcap_get_unmapped_area(struct file *file,
 }
 #endif
 
-static unsigned int bcap_poll(struct file *file, poll_table *wait)
-{
-	struct bcap_device *bcap_dev = video_drvdata(file);
-	unsigned int res;
-
-	mutex_lock(&bcap_dev->mutex);
-	res = vb2_poll(&bcap_dev->buffer_queue, file, wait);
-	mutex_unlock(&bcap_dev->mutex);
-	return res;
-}
-
 static int bcap_queue_setup(struct vb2_queue *vq,
 				const struct v4l2_format *fmt,
 				unsigned int *nbuffers, unsigned int *nplanes,
@@ -896,11 +873,11 @@ static struct v4l2_file_operations bcap_fops = {
 	.open = bcap_open,
 	.release = bcap_release,
 	.unlocked_ioctl = video_ioctl2,
-	.mmap = bcap_mmap,
+	.mmap = vb2_fop_mmap,
 #ifndef CONFIG_MMU
 	.get_unmapped_area = bcap_get_unmapped_area,
 #endif
-	.poll = bcap_poll
+	.poll = vb2_fop_poll
 };
 
 static int bcap_probe(struct platform_device *pdev)
@@ -997,6 +974,7 @@ static int bcap_probe(struct platform_device *pdev)
 	INIT_LIST_HEAD(&bcap_dev->dma_queue);
 
 	vfd->lock = &bcap_dev->mutex;
+	vfd->queue = q;
 
 	/* register video device */
 	ret = video_register_device(bcap_dev->video_dev, VFL_TYPE_GRABBER, -1);
-- 
1.9.1

[PATCH 07/15] media: blackfin: bfin_capture: use v4l2_fh_open and vb2_fop_release

[Lad, Prabhakar]

this patch adds support to use v4l2_fh_open() and vb2_fop_release,
which allows to drop driver specific struct bcap_fh, as this is handled
by core.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
---
 drivers/media/platform/blackfin/bfin_capture.c | 79 +-------------------------
 1 file changed, 2 insertions(+), 77 deletions(-)

diff --git a/drivers/media/platform/blackfin/bfin_capture.c b/drivers/media/platform/blackfin/bfin_capture.c
index df4a6b4..30f1fe0 100644
--- a/drivers/media/platform/blackfin/bfin_capture.c
+++ b/drivers/media/platform/blackfin/bfin_capture.c
@@ -105,12 +105,6 @@ struct bcap_device {
 	bool stop;
 };
 
-struct bcap_fh {
-	struct v4l2_fh fh;
-	/* indicates whether this file handle is doing IO */
-	bool io_allowed;
-};
-
 static const struct bcap_format bcap_formats[] = {
 	{
 		.desc        = "YCbCr 4:2:2 Interleaved UYVY",
@@ -200,50 +194,6 @@ static void bcap_free_sensor_formats(struct bcap_device *bcap_dev)
 	bcap_dev->sensor_formats = NULL;
 }
 
-static int bcap_open(struct file *file)
-{
-	struct bcap_device *bcap_dev = video_drvdata(file);
-	struct video_device *vfd = bcap_dev->video_dev;
-	struct bcap_fh *bcap_fh;
-
-	if (!bcap_dev->sd) {
-		v4l2_err(&bcap_dev->v4l2_dev, "No sub device registered\n");
-		return -ENODEV;
-	}
-
-	bcap_fh = kzalloc(sizeof(*bcap_fh), GFP_KERNEL);
-	if (!bcap_fh) {
-		v4l2_err(&bcap_dev->v4l2_dev,
-			 "unable to allocate memory for file handle object\n");
-		return -ENOMEM;
-	}
-
-	v4l2_fh_init(&bcap_fh->fh, vfd);
-
-	/* store pointer to v4l2_fh in private_data member of file */
-	file->private_data = &bcap_fh->fh;
-	v4l2_fh_add(&bcap_fh->fh);
-	bcap_fh->io_allowed = false;
-	return 0;
-}
-
-static int bcap_release(struct file *file)
-{
-	struct bcap_device *bcap_dev = video_drvdata(file);
-	struct v4l2_fh *fh = file->private_data;
-	struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
-
-	/* if this instance is doing IO */
-	if (bcap_fh->io_allowed)
-		vb2_queue_release(&bcap_dev->buffer_queue);
-
-	file->private_data = NULL;
-	v4l2_fh_del(&bcap_fh->fh);
-	v4l2_fh_exit(&bcap_fh->fh);
-	kfree(bcap_fh);
-	return 0;
-}
-
 #ifndef CONFIG_MMU
 static unsigned long bcap_get_unmapped_area(struct file *file,
 					    unsigned long addr,
@@ -432,13 +382,6 @@ static int bcap_reqbufs(struct file *file, void *priv,
 {
 	struct bcap_device *bcap_dev = video_drvdata(file);
 	struct vb2_queue *vq = &bcap_dev->buffer_queue;
-	struct v4l2_fh *fh = file->private_data;
-	struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
-
-	if (vb2_is_busy(vq))
-		return -EBUSY;
-
-	bcap_fh->io_allowed = true;
 
 	return vb2_reqbufs(vq, req_buf);
 }
@@ -455,11 +398,6 @@ static int bcap_qbuf(struct file *file, void *priv,
 			struct v4l2_buffer *buf)
 {
 	struct bcap_device *bcap_dev = video_drvdata(file);
-	struct v4l2_fh *fh = file->private_data;
-	struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
-
-	if (!bcap_fh->io_allowed)
-		return -EBUSY;
 
 	return vb2_qbuf(&bcap_dev->buffer_queue, buf);
 }
@@ -468,11 +406,6 @@ static int bcap_dqbuf(struct file *file, void *priv,
 			struct v4l2_buffer *buf)
 {
 	struct bcap_device *bcap_dev = video_drvdata(file);
-	struct v4l2_fh *fh = file->private_data;
-	struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
-
-	if (!bcap_fh->io_allowed)
-		return -EBUSY;
 
 	return vb2_dqbuf(&bcap_dev->buffer_queue,
 				buf, file->f_flags & O_NONBLOCK);
@@ -523,14 +456,10 @@ static int bcap_streamon(struct file *file, void *priv,
 				enum v4l2_buf_type buf_type)
 {
 	struct bcap_device *bcap_dev = video_drvdata(file);
-	struct bcap_fh *fh = file->private_data;
 	struct ppi_if *ppi = bcap_dev->ppi;
 	dma_addr_t addr;
 	int ret;
 
-	if (!fh->io_allowed)
-		return -EBUSY;
-
 	/* call streamon to start streaming in videobuf */
 	ret = vb2_streamon(&bcap_dev->buffer_queue, buf_type);
 	if (ret)
@@ -564,10 +493,6 @@ static int bcap_streamoff(struct file *file, void *priv,
 				enum v4l2_buf_type buf_type)
 {
 	struct bcap_device *bcap_dev = video_drvdata(file);
-	struct bcap_fh *fh = file->private_data;
-
-	if (!fh->io_allowed)
-		return -EBUSY;
 
 	return vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
 }
@@ -870,8 +795,8 @@ static const struct v4l2_ioctl_ops bcap_ioctl_ops = {
 
 static struct v4l2_file_operations bcap_fops = {
 	.owner = THIS_MODULE,
-	.open = bcap_open,
-	.release = bcap_release,
+	.open = v4l2_fh_open,
+	.release = vb2_fop_release,
 	.unlocked_ioctl = video_ioctl2,
 	.mmap = vb2_fop_mmap,
 #ifndef CONFIG_MMU
-- 
1.9.1

[PATCH 08/15] media: blackfin: bfin_capture: use vb2_ioctl_* helpers

[Lad, Prabhakar]

this patch adds support to vb2_ioctl_* helpers.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
---
 drivers/media/platform/blackfin/bfin_capture.c | 107 +++++--------------------
 1 file changed, 22 insertions(+), 85 deletions(-)

diff --git a/drivers/media/platform/blackfin/bfin_capture.c b/drivers/media/platform/blackfin/bfin_capture.c
index 30f1fe0..80a0efc 100644
--- a/drivers/media/platform/blackfin/bfin_capture.c
+++ b/drivers/media/platform/blackfin/bfin_capture.c
@@ -272,15 +272,28 @@ static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
 	struct ppi_if *ppi = bcap_dev->ppi;
 	struct bcap_buffer *buf, *tmp;
 	struct ppi_params params;
+	dma_addr_t addr;
 	int ret;
 
 	/* enable streamon on the sub device */
 	ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 1);
 	if (ret && (ret != -ENOIOCTLCMD)) {
 		v4l2_err(&bcap_dev->v4l2_dev, "stream on failed in subdev\n");
+		bcap_dev->cur_frm = NULL;
 		goto err;
 	}
 
+	/* get the next frame from the dma queue */
+	bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
+					struct bcap_buffer, list);
+	/* remove buffer from the dma queue */
+	list_del_init(&bcap_dev->cur_frm->list);
+	addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
+	/* update DMA address */
+	ppi->ops->update_addr(ppi, (unsigned long)addr);
+	/* enable ppi */
+	ppi->ops->start(ppi);
+
 	/* set ppi params */
 	params.width = bcap_dev->fmt.width;
 	params.height = bcap_dev->fmt.height;
@@ -334,6 +347,9 @@ static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
 	return 0;
 
 err:
+	if (bcap_dev->cur_frm)
+		vb2_buffer_done(&bcap_dev->cur_frm->vb, VB2_BUF_STATE_QUEUED);
+
 	list_for_each_entry_safe(buf, tmp, &bcap_dev->dma_queue, list) {
 		list_del(&buf->list);
 		vb2_buffer_done(&buf->vb, VB2_BUF_STATE_QUEUED);
@@ -377,40 +393,6 @@ static struct vb2_ops bcap_video_qops = {
 	.stop_streaming         = bcap_stop_streaming,
 };
 
-static int bcap_reqbufs(struct file *file, void *priv,
-			struct v4l2_requestbuffers *req_buf)
-{
-	struct bcap_device *bcap_dev = video_drvdata(file);
-	struct vb2_queue *vq = &bcap_dev->buffer_queue;
-
-	return vb2_reqbufs(vq, req_buf);
-}
-
-static int bcap_querybuf(struct file *file, void *priv,
-				struct v4l2_buffer *buf)
-{
-	struct bcap_device *bcap_dev = video_drvdata(file);
-
-	return vb2_querybuf(&bcap_dev->buffer_queue, buf);
-}
-
-static int bcap_qbuf(struct file *file, void *priv,
-			struct v4l2_buffer *buf)
-{
-	struct bcap_device *bcap_dev = video_drvdata(file);
-
-	return vb2_qbuf(&bcap_dev->buffer_queue, buf);
-}
-
-static int bcap_dqbuf(struct file *file, void *priv,
-			struct v4l2_buffer *buf)
-{
-	struct bcap_device *bcap_dev = video_drvdata(file);
-
-	return vb2_dqbuf(&bcap_dev->buffer_queue,
-				buf, file->f_flags & O_NONBLOCK);
-}
-
 static irqreturn_t bcap_isr(int irq, void *dev_id)
 {
 	struct ppi_if *ppi = dev_id;
@@ -452,51 +434,6 @@ static irqreturn_t bcap_isr(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-static int bcap_streamon(struct file *file, void *priv,
-				enum v4l2_buf_type buf_type)
-{
-	struct bcap_device *bcap_dev = video_drvdata(file);
-	struct ppi_if *ppi = bcap_dev->ppi;
-	dma_addr_t addr;
-	int ret;
-
-	/* call streamon to start streaming in videobuf */
-	ret = vb2_streamon(&bcap_dev->buffer_queue, buf_type);
-	if (ret)
-		return ret;
-
-	/* if dma queue is empty, return error */
-	if (list_empty(&bcap_dev->dma_queue)) {
-		v4l2_err(&bcap_dev->v4l2_dev, "dma queue is empty\n");
-		ret = -EINVAL;
-		goto err;
-	}
-
-	/* get the next frame from the dma queue */
-	bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
-					struct bcap_buffer, list);
-	/* remove buffer from the dma queue */
-	list_del_init(&bcap_dev->cur_frm->list);
-	addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
-	/* update DMA address */
-	ppi->ops->update_addr(ppi, (unsigned long)addr);
-	/* enable ppi */
-	ppi->ops->start(ppi);
-
-	return 0;
-err:
-	vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
-	return ret;
-}
-
-static int bcap_streamoff(struct file *file, void *priv,
-				enum v4l2_buf_type buf_type)
-{
-	struct bcap_device *bcap_dev = video_drvdata(file);
-
-	return vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
-}
-
 static int bcap_querystd(struct file *file, void *priv, v4l2_std_id *std)
 {
 	struct bcap_device *bcap_dev = video_drvdata(file);
@@ -782,12 +719,12 @@ static const struct v4l2_ioctl_ops bcap_ioctl_ops = {
 	.vidioc_g_dv_timings     = bcap_g_dv_timings,
 	.vidioc_query_dv_timings = bcap_query_dv_timings,
 	.vidioc_enum_dv_timings  = bcap_enum_dv_timings,
-	.vidioc_reqbufs          = bcap_reqbufs,
-	.vidioc_querybuf         = bcap_querybuf,
-	.vidioc_qbuf             = bcap_qbuf,
-	.vidioc_dqbuf            = bcap_dqbuf,
-	.vidioc_streamon         = bcap_streamon,
-	.vidioc_streamoff        = bcap_streamoff,
+	.vidioc_reqbufs          = vb2_ioctl_reqbufs,
+	.vidioc_querybuf         = vb2_ioctl_querybuf,
+	.vidioc_qbuf             = vb2_ioctl_qbuf,
+	.vidioc_dqbuf            = vb2_ioctl_dqbuf,
+	.vidioc_streamon         = vb2_ioctl_streamon,
+	.vidioc_streamoff        = vb2_ioctl_streamoff,
 	.vidioc_g_parm           = bcap_g_parm,
 	.vidioc_s_parm           = bcap_s_parm,
 	.vidioc_log_status       = bcap_log_status,
-- 
1.9.1

[PATCH 09/15] media: blackfin: bfin_capture: make sure all buffers are returned on stop_streaming() callback

[Lad, Prabhakar]

In start_streaming() callback the buffer is removed from the
dma_queue list and assigned to cur_frm, this patch makes sure
that is returned to vb2 core with VB2_BUF_STATE_ERROR flag.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
---
 drivers/media/platform/blackfin/bfin_capture.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/media/platform/blackfin/bfin_capture.c b/drivers/media/platform/blackfin/bfin_capture.c
index 80a0efc..58414dd 100644
--- a/drivers/media/platform/blackfin/bfin_capture.c
+++ b/drivers/media/platform/blackfin/bfin_capture.c
@@ -374,6 +374,9 @@ static void bcap_stop_streaming(struct vb2_queue *vq)
 				"stream off failed in subdev\n");
 
 	/* release all active buffers */
+	if (bcap_dev->cur_frm)
+		vb2_buffer_done(&bcap_dev->cur_frm->vb, VB2_BUF_STATE_ERROR);
+
 	while (!list_empty(&bcap_dev->dma_queue)) {
 		bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
 						struct bcap_buffer, list);
-- 
1.9.1

[PATCH 10/15] media: blackfin: bfin_capture: return -ENODATA for *std calls

[Lad, Prabhakar]

this patch adds supports to return -ENODATA to *_std calls
if the selected output does not support it.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
---
 drivers/media/platform/blackfin/bfin_capture.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/media/platform/blackfin/bfin_capture.c b/drivers/media/platform/blackfin/bfin_capture.c
index 58414dd..9f48795 100644
--- a/drivers/media/platform/blackfin/bfin_capture.c
+++ b/drivers/media/platform/blackfin/bfin_capture.c
@@ -440,6 +440,11 @@ static irqreturn_t bcap_isr(int irq, void *dev_id)
 static int bcap_querystd(struct file *file, void *priv, v4l2_std_id *std)
 {
 	struct bcap_device *bcap_dev = video_drvdata(file);
+	struct v4l2_input input;
+
+	input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
+	if (!(input.capabilities & V4L2_IN_CAP_STD))
+		return -ENODATA;
 
 	return v4l2_subdev_call(bcap_dev->sd, video, querystd, std);
 }
@@ -447,6 +452,11 @@ static int bcap_querystd(struct file *file, void *priv, v4l2_std_id *std)
 static int bcap_g_std(struct file *file, void *priv, v4l2_std_id *std)
 {
 	struct bcap_device *bcap_dev = video_drvdata(file);
+	struct v4l2_input input;
+
+	input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
+	if (!(input.capabilities & V4L2_IN_CAP_STD))
+		return -ENODATA;
 
 	*std = bcap_dev->std;
 	return 0;
@@ -455,8 +465,13 @@ static int bcap_g_std(struct file *file, void *priv, v4l2_std_id *std)
 static int bcap_s_std(struct file *file, void *priv, v4l2_std_id std)
 {
 	struct bcap_device *bcap_dev = video_drvdata(file);
+	struct v4l2_input input;
 	int ret;
 
+	input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
+	if (!(input.capabilities & V4L2_IN_CAP_STD))
+		return -ENODATA;
+
 	if (vb2_is_busy(&bcap_dev->buffer_queue))
 		return -EBUSY;
 
-- 
1.9.1

[PATCH 11/15] media: blackfin: bfin_capture: return -ENODATA for *dv_timings calls

[Lad, Prabhakar]

this patch adds support to return -ENODATA for *dv_timings calls
if the current output does not support it.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
---
 drivers/media/platform/blackfin/bfin_capture.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/drivers/media/platform/blackfin/bfin_capture.c b/drivers/media/platform/blackfin/bfin_capture.c
index 9f48795..f663687 100644
--- a/drivers/media/platform/blackfin/bfin_capture.c
+++ b/drivers/media/platform/blackfin/bfin_capture.c
@@ -487,6 +487,11 @@ static int bcap_enum_dv_timings(struct file *file, void *priv,
 				struct v4l2_enum_dv_timings *timings)
 {
 	struct bcap_device *bcap_dev = video_drvdata(file);
+	struct v4l2_input input;
+
+	input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
+	if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
+		return -ENODATA;
 
 	timings->pad = 0;
 
@@ -498,6 +503,11 @@ static int bcap_query_dv_timings(struct file *file, void *priv,
 				struct v4l2_dv_timings *timings)
 {
 	struct bcap_device *bcap_dev = video_drvdata(file);
+	struct v4l2_input input;
+
+	input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
+	if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
+		return -ENODATA;
 
 	return v4l2_subdev_call(bcap_dev->sd, video,
 				query_dv_timings, timings);
@@ -507,6 +517,11 @@ static int bcap_g_dv_timings(struct file *file, void *priv,
 				struct v4l2_dv_timings *timings)
 {
 	struct bcap_device *bcap_dev = video_drvdata(file);
+	struct v4l2_input input;
+
+	input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
+	if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
+		return -ENODATA;
 
 	*timings = bcap_dev->dv_timings;
 	return 0;
@@ -516,7 +531,13 @@ static int bcap_s_dv_timings(struct file *file, void *priv,
 				struct v4l2_dv_timings *timings)
 {
 	struct bcap_device *bcap_dev = video_drvdata(file);
+	struct v4l2_input input;
 	int ret;
+
+	input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
+	if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
+		return -ENODATA;
+
 	if (vb2_is_busy(&bcap_dev->buffer_queue))
 		return -EBUSY;
 
-- 
1.9.1

[PATCH 12/15] media: blackfin: bfin_capture: add support for vidioc_create_bufs

[Lad, Prabhakar]

this patch adds support for vidioc_create_bufs.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
---
 drivers/media/platform/blackfin/bfin_capture.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/media/platform/blackfin/bfin_capture.c b/drivers/media/platform/blackfin/bfin_capture.c
index f663687..38870c4 100644
--- a/drivers/media/platform/blackfin/bfin_capture.c
+++ b/drivers/media/platform/blackfin/bfin_capture.c
@@ -759,6 +759,7 @@ static const struct v4l2_ioctl_ops bcap_ioctl_ops = {
 	.vidioc_query_dv_timings = bcap_query_dv_timings,
 	.vidioc_enum_dv_timings  = bcap_enum_dv_timings,
 	.vidioc_reqbufs          = vb2_ioctl_reqbufs,
+	.vidioc_create_bufs      = vb2_ioctl_create_bufs,
 	.vidioc_querybuf         = vb2_ioctl_querybuf,
 	.vidioc_qbuf             = vb2_ioctl_qbuf,
 	.vidioc_dqbuf            = vb2_ioctl_dqbuf,
-- 
1.9.1

[PATCH 13/15] media: blackfin: bfin_capture: add support for VB2_DMABUF

[Lad, Prabhakar]

this patch adds support for VB2_DMABUF.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
---
 drivers/media/platform/blackfin/bfin_capture.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/platform/blackfin/bfin_capture.c b/drivers/media/platform/blackfin/bfin_capture.c
index 38870c4..858e333 100644
--- a/drivers/media/platform/blackfin/bfin_capture.c
+++ b/drivers/media/platform/blackfin/bfin_capture.c
@@ -856,7 +856,7 @@ static int bcap_probe(struct platform_device *pdev)
 	/* initialize queue */
 	q = &bcap_dev->buffer_queue;
 	q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-	q->io_modes = VB2_MMAP;
+	q->io_modes = VB2_MMAP | VB2_DMABUF;
 	q->drv_priv = bcap_dev;
 	q->buf_struct_size = sizeof(struct bcap_buffer);
 	q->ops = &bcap_video_qops;
-- 
1.9.1

[PATCH 14/15] media: blackfin: bfin_capture: add support for VIDIOC_EXPBUF

[Lad, Prabhakar]

this patch adds support for VIDIOC_EXPBUF.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
---
 drivers/media/platform/blackfin/bfin_capture.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/media/platform/blackfin/bfin_capture.c b/drivers/media/platform/blackfin/bfin_capture.c
index 858e333..ff89bae 100644
--- a/drivers/media/platform/blackfin/bfin_capture.c
+++ b/drivers/media/platform/blackfin/bfin_capture.c
@@ -763,6 +763,7 @@ static const struct v4l2_ioctl_ops bcap_ioctl_ops = {
 	.vidioc_querybuf         = vb2_ioctl_querybuf,
 	.vidioc_qbuf             = vb2_ioctl_qbuf,
 	.vidioc_dqbuf            = vb2_ioctl_dqbuf,
+	.vidioc_expbuf           = vb2_ioctl_expbuf,
 	.vidioc_streamon         = vb2_ioctl_streamon,
 	.vidioc_streamoff        = vb2_ioctl_streamoff,
 	.vidioc_g_parm           = bcap_g_parm,
-- 
1.9.1

[PATCH 15/15] media: blackfin: bfin_capture: set v4l2 buffer sequence

[Lad, Prabhakar]

this patch adds support to set the v4l2 buffer sequence.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
---
 drivers/media/platform/blackfin/bfin_capture.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/media/platform/blackfin/bfin_capture.c b/drivers/media/platform/blackfin/bfin_capture.c
index ff89bae..1607bc9 100644
--- a/drivers/media/platform/blackfin/bfin_capture.c
+++ b/drivers/media/platform/blackfin/bfin_capture.c
@@ -103,6 +103,8 @@ struct bcap_device {
 	struct completion comp;
 	/* prepare to stop */
 	bool stop;
+	/* vb2 buffer sequence counter */
+	unsigned sequence;
 };
 
 static const struct bcap_format bcap_formats[] = {
@@ -341,6 +343,8 @@ static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
 		goto err;
 	}
 
+	bcap_dev->sequence = 0;
+
 	reinit_completion(&bcap_dev->comp);
 	bcap_dev->stop = false;
 
@@ -411,6 +415,7 @@ static irqreturn_t bcap_isr(int irq, void *dev_id)
 			vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
 			ppi->err = false;
 		} else {
+			vb->v4l2_buf.sequence = bcap_dev->sequence++;
 			vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
 		}
 		bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
-- 
1.9.1

Re: [PATCH 00/15] media: blackfin: bfin_capture enhancements

[Scott Jiang]

Hi Lad,

I'm on holiday these days. I will test these patches later.

Thanks,
Scott

2014-12-20 18:47 GMT+08:00 Lad, Prabhakar <prabhakar.csengg@gmail.com>:
> Hi Scott,
>
> Although I was on holiday but couldn't resist myself from working,
> since I was away from my hardware I had to choose a different one,
> blackfin driver was lucky one. Since I don't have the blackfin
> board I haven't tested them on the actual board, but just compile
> tested, Can you please test it & ACK.
>
> Lad, Prabhakar (15):
>   media: blackfin: bfin_capture: drop buf_init() callback
>   media: blackfin: bfin_capture: release buffers in case
>     start_streaming() call back fails
>   media: blackfin: bfin_capture: set min_buffers_needed
>   media: blackfin: bfin_capture: improve buf_prepare() callback
>   media: blackfin: bfin_capture: improve queue_setup() callback
>   media: blackfin: bfin_capture: use vb2_fop_mmap/poll
>   media: blackfin: bfin_capture: use v4l2_fh_open and vb2_fop_release
>   media: blackfin: bfin_capture: use vb2_ioctl_* helpers
>   media: blackfin: bfin_capture: make sure all buffers are returned on
>     stop_streaming() callback
>   media: blackfin: bfin_capture: return -ENODATA for *std calls
>   media: blackfin: bfin_capture: return -ENODATA for *dv_timings calls
>   media: blackfin: bfin_capture: add support for vidioc_create_bufs
>   media: blackfin: bfin_capture: add support for VB2_DMABUF
>   media: blackfin: bfin_capture: add support for VIDIOC_EXPBUF
>   media: blackfin: bfin_capture: set v4l2 buffer sequence
>
>  drivers/media/platform/blackfin/bfin_capture.c | 310 ++++++++-----------------
>  1 file changed, 98 insertions(+), 212 deletions(-)
>
> --
> 1.9.1
>

Re: [PATCH 00/15] media: blackfin: bfin_capture enhancements

[Hans Verkuil]

Hi Scott,

Any idea when you will have time to test this?

Regards,

	Hans

On 12/26/2014 08:13 AM, Scott Jiang wrote:
> Hi Lad,
> 
> I'm on holiday these days. I will test these patches later.
> 
> Thanks,
> Scott
> 
> 2014-12-20 18:47 GMT+08:00 Lad, Prabhakar <prabhakar.csengg@gmail.com>:
>> Hi Scott,
>>
>> Although I was on holiday but couldn't resist myself from working,
>> since I was away from my hardware I had to choose a different one,
>> blackfin driver was lucky one. Since I don't have the blackfin
>> board I haven't tested them on the actual board, but just compile
>> tested, Can you please test it & ACK.
>>
>> Lad, Prabhakar (15):
>>   media: blackfin: bfin_capture: drop buf_init() callback
>>   media: blackfin: bfin_capture: release buffers in case
>>     start_streaming() call back fails
>>   media: blackfin: bfin_capture: set min_buffers_needed
>>   media: blackfin: bfin_capture: improve buf_prepare() callback
>>   media: blackfin: bfin_capture: improve queue_setup() callback
>>   media: blackfin: bfin_capture: use vb2_fop_mmap/poll
>>   media: blackfin: bfin_capture: use v4l2_fh_open and vb2_fop_release
>>   media: blackfin: bfin_capture: use vb2_ioctl_* helpers
>>   media: blackfin: bfin_capture: make sure all buffers are returned on
>>     stop_streaming() callback
>>   media: blackfin: bfin_capture: return -ENODATA for *std calls
>>   media: blackfin: bfin_capture: return -ENODATA for *dv_timings calls
>>   media: blackfin: bfin_capture: add support for vidioc_create_bufs
>>   media: blackfin: bfin_capture: add support for VB2_DMABUF
>>   media: blackfin: bfin_capture: add support for VIDIOC_EXPBUF
>>   media: blackfin: bfin_capture: set v4l2 buffer sequence
>>
>>  drivers/media/platform/blackfin/bfin_capture.c | 310 ++++++++-----------------
>>  1 file changed, 98 insertions(+), 212 deletions(-)
>>
>> --
>> 1.9.1
>>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-media" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 

Re: [PATCH 05/15] media: blackfin: bfin_capture: improve queue_setup() callback

[Scott Jiang]

2014-12-20 18:47 GMT+08:00 Lad, Prabhakar <prabhakar.csengg@gmail.com>:
> this patch improves the queue_setup() callback.
>
> Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
> ---
>  drivers/media/platform/blackfin/bfin_capture.c | 10 ++++++----
>  1 file changed, 6 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/media/platform/blackfin/bfin_capture.c b/drivers/media/platform/blackfin/bfin_capture.c
> index 8bd94a1..76d42bb 100644
> --- a/drivers/media/platform/blackfin/bfin_capture.c
> +++ b/drivers/media/platform/blackfin/bfin_capture.c
> @@ -44,7 +44,6 @@
>  #include <media/blackfin/ppi.h>
>
>  #define CAPTURE_DRV_NAME        "bfin_capture"
> -#define BCAP_MIN_NUM_BUF        2
>
>  struct bcap_format {
>         char *desc;
> @@ -292,11 +291,14 @@ static int bcap_queue_setup(struct vb2_queue *vq,
>  {
>         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
>
> -       if (*nbuffers < BCAP_MIN_NUM_BUF)
> -               *nbuffers = BCAP_MIN_NUM_BUF;
> +       if (fmt && fmt->fmt.pix.sizeimage < bcap_dev->fmt.sizeimage)
> +               return -EINVAL;
> +
> +       if (vq->num_buffers + *nbuffers < 3)
> +               *nbuffers = 3 - vq->num_buffers;

It seems it changes the minimum buffers from 2 to 3?

>
>         *nplanes = 1;
> -       sizes[0] = bcap_dev->fmt.sizeimage;
> +       sizes[0] = fmt ? fmt->fmt.pix.sizeimage : bcap_dev->fmt.sizeimage;
>         alloc_ctxs[0] = bcap_dev->alloc_ctx;
>

Re: [PATCH 08/15] media: blackfin: bfin_capture: use vb2_ioctl_* helpers

[Scott Jiang]

2014-12-20 18:47 GMT+08:00 Lad, Prabhakar <prabhakar.csengg@gmail.com>:
> this patch adds support to vb2_ioctl_* helpers.
>
> Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
> ---
>  drivers/media/platform/blackfin/bfin_capture.c | 107 +++++--------------------
>  1 file changed, 22 insertions(+), 85 deletions(-)
>
> diff --git a/drivers/media/platform/blackfin/bfin_capture.c b/drivers/media/platform/blackfin/bfin_capture.c
> index 30f1fe0..80a0efc 100644
> --- a/drivers/media/platform/blackfin/bfin_capture.c
> +++ b/drivers/media/platform/blackfin/bfin_capture.c
> @@ -272,15 +272,28 @@ static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
>         struct ppi_if *ppi = bcap_dev->ppi;
>         struct bcap_buffer *buf, *tmp;
>         struct ppi_params params;
> +       dma_addr_t addr;
>         int ret;
>
>         /* enable streamon on the sub device */
>         ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 1);
>         if (ret && (ret != -ENOIOCTLCMD)) {
>                 v4l2_err(&bcap_dev->v4l2_dev, "stream on failed in subdev\n");
> +               bcap_dev->cur_frm = NULL;
>                 goto err;
>         }
>
> +       /* get the next frame from the dma queue */
> +       bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
> +                                       struct bcap_buffer, list);
> +       /* remove buffer from the dma queue */
> +       list_del_init(&bcap_dev->cur_frm->list);
> +       addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
> +       /* update DMA address */
> +       ppi->ops->update_addr(ppi, (unsigned long)addr);
> +       /* enable ppi */
> +       ppi->ops->start(ppi);
> +

Absolutely wrong here. You can't start ppi before you set ppi params.
In fact  vb2_streamon() is called before this in bcap_streamon().

Re: [PATCH 08/15] media: blackfin: bfin_capture: use vb2_ioctl_* helpers

[Lad, Prabhakar]

On Wed, Jan 21, 2015 at 10:55 AM, Scott Jiang
<scott.jiang.linux@gmail.com> wrote:
> 2014-12-20 18:47 GMT+08:00 Lad, Prabhakar <prabhakar.csengg@gmail.com>:
>> this patch adds support to vb2_ioctl_* helpers.
>>
>> Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
>> ---
>>  drivers/media/platform/blackfin/bfin_capture.c | 107 +++++--------------------
>>  1 file changed, 22 insertions(+), 85 deletions(-)
>>
>> diff --git a/drivers/media/platform/blackfin/bfin_capture.c b/drivers/media/platform/blackfin/bfin_capture.c
>> index 30f1fe0..80a0efc 100644
>> --- a/drivers/media/platform/blackfin/bfin_capture.c
>> +++ b/drivers/media/platform/blackfin/bfin_capture.c
>> @@ -272,15 +272,28 @@ static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
>>         struct ppi_if *ppi = bcap_dev->ppi;
>>         struct bcap_buffer *buf, *tmp;
>>         struct ppi_params params;
>> +       dma_addr_t addr;
>>         int ret;
>>
>>         /* enable streamon on the sub device */
>>         ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 1);
>>         if (ret && (ret != -ENOIOCTLCMD)) {
>>                 v4l2_err(&bcap_dev->v4l2_dev, "stream on failed in subdev\n");
>> +               bcap_dev->cur_frm = NULL;
>>                 goto err;
>>         }
>>
>> +       /* get the next frame from the dma queue */
>> +       bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
>> +                                       struct bcap_buffer, list);
>> +       /* remove buffer from the dma queue */
>> +       list_del_init(&bcap_dev->cur_frm->list);
>> +       addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
>> +       /* update DMA address */
>> +       ppi->ops->update_addr(ppi, (unsigned long)addr);
>> +       /* enable ppi */
>> +       ppi->ops->start(ppi);
>> +
>
> Absolutely wrong here. You can't start ppi before you set ppi params.
> In fact  vb2_streamon() is called before this in bcap_streamon().

Agreed need to move the  ppi->ops->start(ppi); call after
ret = ppi->ops->set_params(ppi, &params); that should fix it.

Thanks,
--Prabhakar Lad

Re: [PATCH 05/15] media: blackfin: bfin_capture: improve queue_setup() callback

[Lad, Prabhakar]

On Wed, Jan 21, 2015 at 10:01 AM, Scott Jiang
<scott.jiang.linux@gmail.com> wrote:
> 2014-12-20 18:47 GMT+08:00 Lad, Prabhakar <prabhakar.csengg@gmail.com>:
>> this patch improves the queue_setup() callback.
>>
>> Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
>> ---
>>  drivers/media/platform/blackfin/bfin_capture.c | 10 ++++++----
>>  1 file changed, 6 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/media/platform/blackfin/bfin_capture.c b/drivers/media/platform/blackfin/bfin_capture.c
>> index 8bd94a1..76d42bb 100644
>> --- a/drivers/media/platform/blackfin/bfin_capture.c
>> +++ b/drivers/media/platform/blackfin/bfin_capture.c
>> @@ -44,7 +44,6 @@
>>  #include <media/blackfin/ppi.h>
>>
>>  #define CAPTURE_DRV_NAME        "bfin_capture"
>> -#define BCAP_MIN_NUM_BUF        2
>>
>>  struct bcap_format {
>>         char *desc;
>> @@ -292,11 +291,14 @@ static int bcap_queue_setup(struct vb2_queue *vq,
>>  {
>>         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
>>
>> -       if (*nbuffers < BCAP_MIN_NUM_BUF)
>> -               *nbuffers = BCAP_MIN_NUM_BUF;
>> +       if (fmt && fmt->fmt.pix.sizeimage < bcap_dev->fmt.sizeimage)
>> +               return -EINVAL;
>> +
>> +       if (vq->num_buffers + *nbuffers < 3)
>> +               *nbuffers = 3 - vq->num_buffers;
>
> It seems it changes the minimum buffers from 2 to 3?
>
will replace it with,

if (vq->num_buffers + *nbuffers < 2)
       *nbuffers = 2;

Thanks,
--Prabhakar Lad

Re: [PATCH 00/15] media: blackfin: bfin_capture enhancements

[Lad, Prabhakar]

Hi Scott,

On Sat, Dec 20, 2014 at 10:47 AM, Lad, Prabhakar
<prabhakar.csengg@gmail.com> wrote:
> Hi Scott,
>
> Although I was on holiday but couldn't resist myself from working,
> since I was away from my hardware I had to choose a different one,
> blackfin driver was lucky one. Since I don't have the blackfin
> board I haven't tested them on the actual board, but just compile
> tested, Can you please test it & ACK.
>
> Lad, Prabhakar (15):
>   media: blackfin: bfin_capture: drop buf_init() callback
>   media: blackfin: bfin_capture: release buffers in case
>     start_streaming() call back fails
>   media: blackfin: bfin_capture: set min_buffers_needed
>   media: blackfin: bfin_capture: improve buf_prepare() callback
>   media: blackfin: bfin_capture: improve queue_setup() callback
>   media: blackfin: bfin_capture: use vb2_fop_mmap/poll
>   media: blackfin: bfin_capture: use v4l2_fh_open and vb2_fop_release
>   media: blackfin: bfin_capture: use vb2_ioctl_* helpers
>   media: blackfin: bfin_capture: make sure all buffers are returned on
>     stop_streaming() callback
>   media: blackfin: bfin_capture: return -ENODATA for *std calls
>   media: blackfin: bfin_capture: return -ENODATA for *dv_timings calls
>   media: blackfin: bfin_capture: add support for vidioc_create_bufs
>   media: blackfin: bfin_capture: add support for VB2_DMABUF
>   media: blackfin: bfin_capture: add support for VIDIOC_EXPBUF
>   media: blackfin: bfin_capture: set v4l2 buffer sequence
>
>  drivers/media/platform/blackfin/bfin_capture.c | 310 ++++++++-----------------
>  1 file changed, 98 insertions(+), 212 deletions(-)
>
If you are done with the review of all the patches,should I go ahead
and post a v2 fixing the two issues which you pointed out ?

Thanks,
--Prabhakar Lad

Re: [PATCH 00/15] media: blackfin: bfin_capture enhancements

[Scott Jiang]

Hi Lad,

>>
>> Although I was on holiday but couldn't resist myself from working,
>> since I was away from my hardware I had to choose a different one,
>> blackfin driver was lucky one. Since I don't have the blackfin
>> board I haven't tested them on the actual board, but just compile
>> tested, Can you please test it & ACK.
>>
>> Lad, Prabhakar (15):
>>   media: blackfin: bfin_capture: drop buf_init() callback
>>   media: blackfin: bfin_capture: release buffers in case
>>     start_streaming() call back fails
>>   media: blackfin: bfin_capture: set min_buffers_needed
>>   media: blackfin: bfin_capture: improve buf_prepare() callback
>>   media: blackfin: bfin_capture: improve queue_setup() callback
>>   media: blackfin: bfin_capture: use vb2_fop_mmap/poll
>>   media: blackfin: bfin_capture: use v4l2_fh_open and vb2_fop_release
>>   media: blackfin: bfin_capture: use vb2_ioctl_* helpers
>>   media: blackfin: bfin_capture: make sure all buffers are returned on
>>     stop_streaming() callback
>>   media: blackfin: bfin_capture: return -ENODATA for *std calls
>>   media: blackfin: bfin_capture: return -ENODATA for *dv_timings calls
>>   media: blackfin: bfin_capture: add support for vidioc_create_bufs
>>   media: blackfin: bfin_capture: add support for VB2_DMABUF
>>   media: blackfin: bfin_capture: add support for VIDIOC_EXPBUF
>>   media: blackfin: bfin_capture: set v4l2 buffer sequence
>>
>>  drivers/media/platform/blackfin/bfin_capture.c | 310 ++++++++-----------------
>>  1 file changed, 98 insertions(+), 212 deletions(-)
>>
> If you are done with the review of all the patches,should I go ahead
> and post a v2 fixing the two issues which you pointed out ?
>
Yes, I have reviewed and tested other patches.

Thanks,
Scott