Hi Laurent,
Ok - I've gone through this properly now, and I really like what I see :)
Definitely some good changes here - and my comments are only minor
fixups which are just things I've noticed which we can 'squash' in.
You'll find 'fixup commits' for the following three hunks:
- FDP1_NUMBER_BUFFERS
- old struct fdp1_job comment
- fdp1_field_complete(), unused ctx removal
at
git://git.kernel.org/pub/scm/linux/kernel/git/kbingham/rcar.git fdp1/review
if you wish to use them.
The rework of buffer usage here really makes a big difference I think.
Removing the late allocations, and preparing the buffers early is
clearly more elegant and less prone to failure.
Thanks
Kieran
...
Obligatory over tagging
Acked-by: Kieran Bingham <kie...@bingham.xyz>
Reviewed-by: Kieran Bingham <kie...@bingham.xyz>
On 07/09/16 23:25, Laurent Pinchart wrote:
> The struct fdp1_buffer instances are allocated separately from the vb2
> buffers, with one instance per field. Simplify the allocation by
> splitting the fdp1_buffer structure in per-buffer and per-field data,
> and let vb2 allocate the the fdp1_buffer structure.
>
> Signed-off-by: Laurent Pinchart <laurent.pinchart+rene...@ideasonboard.com>
> ---
> drivers/media/platform/rcar_fdp1.c | 437
> ++++++++++++++++++-------------------
> 1 file changed, 210 insertions(+), 227 deletions(-)
>
> diff --git a/drivers/media/platform/rcar_fdp1.c
> b/drivers/media/platform/rcar_fdp1.c
> index c25531a919db..d4101a4fd114 100644
> --- a/drivers/media/platform/rcar_fdp1.c
> +++ b/drivers/media/platform/rcar_fdp1.c
Now that it's not used, we can add in a
@@ ~ 61
- #define FDP1_NUMBER_BUFFERS ((FDP1_NUMBER_JOBS*2)+1)
(Removing that makes me happy)
> @@ -473,12 +473,12 @@ static const u8 fdp1_mdet[] = {
>
> /* Per-queue, driver-specific private data */
> struct fdp1_q_data {
> - const struct fdp1_fmt *fmt;
> - struct v4l2_pix_format_mplane format;
> + const struct fdp1_fmt *fmt;
> + struct v4l2_pix_format_mplane format;
>
> - unsigned int vsize;
> - unsigned int stride_y;
> - unsigned int stride_c;
> + unsigned int vsize;
> + unsigned int stride_y;
> + unsigned int stride_c;
> };
>
> static const struct fdp1_fmt *fdp1_find_format(u32 pixelformat)
> @@ -519,91 +519,102 @@ enum fdp1_deint_mode {
> * from the VB buffers using this context structure.
> * Will always be a field or a full frame, never two fields.
> */
> -struct fdp1_buffer {
> - struct vb2_v4l2_buffer *vb;
> - dma_addr_t addrs[3];
> +struct fdp1_field_buffer {
> + struct vb2_v4l2_buffer *vb;
> + dma_addr_t addrs[3];
>
> /* Should be NONE:TOP:BOTTOM only */
> - enum v4l2_field field;
> + enum v4l2_field field;
>
> /* Flag to indicate this is the last field in the vb */
> - bool last_field;
> + bool last_field;
>
> /* Buffer queue lists */
> - struct list_head list;
> + struct list_head list;
> +};
> +
> +struct fdp1_buffer {
> + struct v4l2_m2m_buffer m2m_buf;
> + struct fdp1_field_buffer fields[2];
> + unsigned int num_fields;
> };
>
> +static inline struct fdp1_buffer *to_fdp1_buffer(struct vb2_v4l2_buffer *vb)
> +{
> + return container_of(vb, struct fdp1_buffer, m2m_buf.vb);
> +}
> +
> struct fdp1_job {
> /* These could be pointers to save 'memory' and copying */
This comment is now defunct.
> - struct fdp1_buffer *previous;
> - struct fdp1_buffer *active;
> - struct fdp1_buffer *next;
> - struct fdp1_buffer dst;
> + struct fdp1_field_buffer *previous;
> + struct fdp1_field_buffer *active;
> + struct fdp1_field_buffer *next;
> + struct fdp1_field_buffer *dst;
>
> /* A job can only be on one list at a time */
> - struct list_head list;
> + struct list_head list;
> };
>
> struct fdp1_dev {
> - struct v4l2_device v4l2_dev;
> - struct video_device vfd;
> + struct v4l2_device v4l2_dev;
> + struct video_device vfd;
>
> - struct mutex dev_mutex;
> - spinlock_t irqlock;
> - spinlock_t device_process_lock;
> + struct mutex dev_mutex;
> + spinlock_t irqlock;
> + spinlock_t device_process_lock;
>
> - void __iomem *regs;
> - unsigned int irq;
> - struct device *dev;
> + void __iomem *regs;
> + unsigned int irq;
> + struct device *dev;
>
> /* Job Queues */
> - struct fdp1_job jobs[FDP1_NUMBER_JOBS];
> - struct list_head free_job_list;
> - struct list_head queued_job_list;
> - struct list_head hw_job_list;
> + struct fdp1_job jobs[FDP1_NUMBER_JOBS];
> + struct list_head free_job_list;
> + struct list_head queued_job_list;
> + struct list_head hw_job_list;
>
> - unsigned int clk_rate;
> + unsigned int clk_rate;
>
> - struct rcar_fcp_device *fcp;
> - struct v4l2_m2m_dev *m2m_dev;
> + struct rcar_fcp_device *fcp;
> + struct v4l2_m2m_dev *m2m_dev;
> };
>
> struct fdp1_ctx {
> - struct v4l2_fh fh;
> - struct fdp1_dev *fdp1;
> + struct v4l2_fh fh;
> + struct fdp1_dev *fdp1;
>
> - struct v4l2_ctrl_handler hdl;
> - unsigned int sequence;
> + struct v4l2_ctrl_handler hdl;
> + unsigned int sequence;
>
> /* Processed buffers in this transaction */
> - u8 num_processed;
> + u8 num_processed;
>
> /* Transaction length (i.e. how many buffers per transaction) */
> - u32 translen;
> + u32 translen;
>
> /* Abort requested by m2m */
> - int aborting;
> + int aborting;
>
> /* Deinterlace processing mode */
> - enum fdp1_deint_mode deint_mode;
> + enum fdp1_deint_mode deint_mode;
>
> /*
> * Adaptive 2d 3d mode uses a shared mask
> * This is allocated at streamon, if the ADAPT2D3D mode
> * is requested
> */
> - unsigned int smsk_size;
> - dma_addr_t smsk_addr[2];
> - void *smsk_cpu;
> + unsigned int smsk_size;
> + dma_addr_t smsk_addr[2];
> + void *smsk_cpu;
>
> /* Capture pipeline, can specify an alpha value
> * for supported formats. 0-255 only
> */
> - unsigned char alpha;
> + unsigned char alpha;
>
> /* Source and destination queue data */
> - struct fdp1_q_data out_q; /* HW Source */
> - struct fdp1_q_data cap_q; /* HW Destination */
> + struct fdp1_q_data out_q; /* HW Source */
> + struct fdp1_q_data cap_q; /* HW Destination */
>
> /*
> * Field Queues
> @@ -613,16 +624,14 @@ struct fdp1_ctx {
> * V4L2 Buffers are tracked inside the fdp1_buffer
> * and released when the last 'field' completes
> */
> - struct fdp1_buffer buffers[FDP1_NUMBER_BUFFERS];
> - struct list_head free_buffers;
> - struct list_head fdp1_buffer_queue;
> - unsigned int buffers_queued;
> + struct list_head fields_queue;
> + unsigned int buffers_queued;
>
Minimising these queues is definitely a good way forwards.
> /*
> * For de-interlacing we need to track our previous buffer
> * while preparing our job lists.
> */
> - struct fdp1_buffer *previous;
> + struct fdp1_field_buffer *previous;
> };
>
> static inline struct fdp1_ctx *fh_to_ctx(struct v4l2_fh *fh)
> @@ -711,90 +720,61 @@ static struct fdp1_job *get_hw_queued_job(struct
> fdp1_dev *fdp1)
> /*
> * Buffer lists handling
> */
> -static struct fdp1_buffer *list_remove_buffer(struct fdp1_dev *fdp1,
> - struct list_head *list)
> +static void fdp1_field_complete(struct fdp1_ctx *ctx,
Looks like we don't need to pass ctx here anymore?
> + struct fdp1_field_buffer *fbuf)
> {
> - struct fdp1_buffer *buf;
> - unsigned long flags;
> -
> - spin_lock_irqsave(&fdp1->irqlock, flags);
> - buf = list_first_entry_or_null(list, struct fdp1_buffer, list);
> - if (buf)
> - list_del(&buf->list);
> - spin_unlock_irqrestore(&fdp1->irqlock, flags);
> + /* job->previous may be on the first field */
> + if (!fbuf)
> + return;
>
> - return buf;
> + if (fbuf->last_field)
> + v4l2_m2m_buf_done(fbuf->vb, VB2_BUF_STATE_DONE);
> }
>
> -/*
> - * list_add_buffer: Add a buffer to the specified list
> - *
> - * Returns: void - always succeeds
> - */
> -static void list_add_buffer(struct fdp1_dev *fdp1,
> - struct list_head *list,
> - struct fdp1_buffer *buf)
> +static void fdp1_queue_field(struct fdp1_ctx *ctx,
> + struct fdp1_field_buffer *fbuf)
> {
> unsigned long flags;
>
> - spin_lock_irqsave(&fdp1->irqlock, flags);
> - list_add_tail(&buf->list, list);
> - spin_unlock_irqrestore(&fdp1->irqlock, flags);
> -}
> + spin_lock_irqsave(&ctx->fdp1->irqlock, flags);
> + list_add_tail(&fbuf->list, &ctx->fields_queue);
> + spin_unlock_irqrestore(&ctx->fdp1->irqlock, flags);
>
> -/*
> - * fdp1_buffer_alloc: Retrieve a buffer to track a single field/frame
> - *
> - * Must always return a buffer, and should block if necessary.
> - */
> -static struct fdp1_buffer *fdp1_buffer_alloc(struct fdp1_ctx *ctx)
> -{
> - return list_remove_buffer(ctx->fdp1, &ctx->free_buffers);
> + ctx->buffers_queued++;
> }
>
> -static void fdp1_buffer_free(struct fdp1_ctx *ctx,
> - struct fdp1_buffer *buf)
> +static struct fdp1_field_buffer *fdp1_dequeue_field(struct fdp1_ctx *ctx)
> {
> - /* job->previous may be on the first field */
> - if (!buf)
> - return;
> -
> - if (buf->last_field)
> - v4l2_m2m_buf_done(buf->vb, VB2_BUF_STATE_DONE);
> -
> - memset(buf, 0, sizeof(struct fdp1_buffer));
> + struct fdp1_field_buffer *fbuf;
> + unsigned long flags;
>
> - list_add_buffer(ctx->fdp1, &ctx->free_buffers, buf);
> -}
> + ctx->buffers_queued--;
>
> -static void queue_buffer(struct fdp1_ctx *ctx, struct fdp1_buffer *buf)
> -{
> - list_add_buffer(ctx->fdp1, &ctx->fdp1_buffer_queue, buf);
> - ctx->buffers_queued++;
> -}
> + spin_lock_irqsave(&ctx->fdp1->irqlock, flags);
> + fbuf = list_first_entry_or_null(&ctx->fields_queue,
> + struct fdp1_field_buffer, list);
> + if (fbuf)
> + list_del(&fbuf->list);
> + spin_unlock_irqrestore(&ctx->fdp1->irqlock, flags);
>
> -static struct fdp1_buffer *dequeue_buffer(struct fdp1_ctx *ctx)
> -{
> - ctx->buffers_queued--;
> - return list_remove_buffer(ctx->fdp1, &ctx->fdp1_buffer_queue);
> + return fbuf;
> }
>
> /*
> - * Return the next buffer in the queue - or NULL,
> + * Return the next field in the queue - or NULL,
> * without removing the item from the list
> */
> -static struct fdp1_buffer *peek_queued_buffer(struct fdp1_ctx *ctx)
> +static struct fdp1_field_buffer *fdp1_peek_queued_field(struct fdp1_ctx *ctx)
> {
> - struct fdp1_dev *fdp1 = ctx->fdp1;
> + struct fdp1_field_buffer *fbuf;
> unsigned long flags;
> - struct fdp1_buffer *buf;
>
> - spin_lock_irqsave(&fdp1->irqlock, flags);
> - buf = list_first_entry_or_null(&ctx->fdp1_buffer_queue,
> - struct fdp1_buffer, list);
> - spin_unlock_irqrestore(&fdp1->irqlock, flags);
> + spin_lock_irqsave(&ctx->fdp1->irqlock, flags);
> + fbuf = list_first_entry_or_null(&ctx->fields_queue,
> + struct fdp1_field_buffer, list);
> + spin_unlock_irqrestore(&ctx->fdp1->irqlock, flags);
>
> - return buf;
> + return fbuf;
> }
>
> static u32 fdp1_read(struct fdp1_dev *fdp1, unsigned int reg)
> @@ -1015,9 +995,9 @@ static void fdp1_configure_wpf(struct fdp1_ctx *ctx,
> fdp1_write(fdp1, swap, FD1_WPF_SWAP);
> fdp1_write(fdp1, pstride, FD1_WPF_PSTRIDE);
>
> - fdp1_write(fdp1, job->dst.addrs[0], FD1_WPF_ADDR_Y);
> - fdp1_write(fdp1, job->dst.addrs[1], FD1_WPF_ADDR_C0);
> - fdp1_write(fdp1, job->dst.addrs[2], FD1_WPF_ADDR_C1);
> + fdp1_write(fdp1, job->dst->addrs[0], FD1_WPF_ADDR_Y);
> + fdp1_write(fdp1, job->dst->addrs[1], FD1_WPF_ADDR_C0);
> + fdp1_write(fdp1, job->dst->addrs[2], FD1_WPF_ADDR_C1);
> }
>
> static void fdp1_configure_deint_mode(struct fdp1_ctx *ctx,
> @@ -1196,80 +1176,15 @@ static void fdp1_m2m_job_abort(void *priv)
> }
>
> /*
> - * prepare_buffer: Prepare an fdp1_buffer, from a vb2_v4l2_buffer
> - *
> - * This helps us serialise buffers containing two fields into
> - * sequential top and bottom fields.
> - * Destination buffers also go through this function to
> - * set the vb and addrs in the same manner.
> - */
> -static void prepare_buffer(struct fdp1_ctx *ctx,
> - struct fdp1_buffer *buf,
> - struct vb2_v4l2_buffer *vb,
> - bool next_field, bool last_field)
> -{
> - struct fdp1_q_data *q_data = get_q_data(ctx, vb->vb2_buf.type);
> - unsigned int i;
> -
> - buf->vb = vb;
> - buf->last_field = last_field;
> -
> - for (i = 0; i < vb->vb2_buf.num_planes; ++i)
> - buf->addrs[i] = vb2_dma_contig_plane_dma_addr(&vb->vb2_buf, i);
> -
> - switch (vb->field) {
> - case V4L2_FIELD_INTERLACED:
> - /*
> - * Interlaced means bottom-top for 60Hz TV standards (NTSC) and
> - * top-bottom for 50Hz. As TV standards are not applicable to
> - * the mem-to-mem API, use the height as a heuristic.
> - */
> - buf->field = (q_data->format.height < 576) == next_field
> - ? V4L2_FIELD_TOP : V4L2_FIELD_BOTTOM;
> - break;
> - case V4L2_FIELD_INTERLACED_TB:
> - case V4L2_FIELD_SEQ_TB:
> - buf->field = next_field ? V4L2_FIELD_BOTTOM : V4L2_FIELD_TOP;
> - break;
> - case V4L2_FIELD_INTERLACED_BT:
> - case V4L2_FIELD_SEQ_BT:
> - buf->field = next_field ? V4L2_FIELD_TOP : V4L2_FIELD_BOTTOM;
> - break;
> - default:
> - buf->field = vb->field;
> - break;
> - }
> -
> - /* Buffer is completed */
> - if (next_field == false)
> - return;
> -
> - /* Adjust buffer addresses for second field */
> - switch (vb->field) {
> - case V4L2_FIELD_INTERLACED:
> - case V4L2_FIELD_INTERLACED_TB:
> - case V4L2_FIELD_INTERLACED_BT:
> - for (i = 0; i < vb->vb2_buf.num_planes; i++)
> - buf->addrs[i] +=
> - (i == 0 ? q_data->stride_y : q_data->stride_c);
> - break;
> - case V4L2_FIELD_SEQ_TB:
> - case V4L2_FIELD_SEQ_BT:
> - for (i = 0; i < vb->vb2_buf.num_planes; i++)
> - buf->addrs[i] += q_data->vsize *
> - (i == 0 ? q_data->stride_y : q_data->stride_c);
> - break;
> - }
> -}
> -
> -/*
> - * prepare_job: Prepare and queue a new job for a single action of work
> + * fdp1_prepare_job: Prepare and queue a new job for a single action of work
> *
> * Prepare the next field, (or frame in progressive) and an output
> * buffer for the hardware to perform a single operation.
> */
> -static struct fdp1_job *prepare_job(struct fdp1_ctx *ctx)
> +static struct fdp1_job *fdp1_prepare_job(struct fdp1_ctx *ctx)
> {
> + struct vb2_v4l2_buffer *vbuf;
> + struct fdp1_buffer *fbuf;
> struct fdp1_dev *fdp1 = ctx->fdp1;
> struct fdp1_job *job;
> unsigned int buffers_required = 1;
> @@ -1280,7 +1195,7 @@ static struct fdp1_job *prepare_job(struct fdp1_ctx
> *ctx)
> buffers_required = 2;
>
> if (ctx->buffers_queued < buffers_required)
> - return 0;
> + return NULL;
>
> job = fdp1_job_alloc(fdp1);
> if (!job) {
> @@ -1288,7 +1203,7 @@ static struct fdp1_job *prepare_job(struct fdp1_ctx
> *ctx)
> return NULL;
> }
>
> - job->active = dequeue_buffer(ctx);
> + job->active = fdp1_dequeue_field(ctx);
> if (!job->active) {
> /* Buffer check should prevent this ever happening */
> dprintk(fdp1, "No input buffers currently available\n");
> @@ -1302,11 +1217,12 @@ static struct fdp1_job *prepare_job(struct fdp1_ctx
> *ctx)
> /* Source buffers have been prepared on our buffer_queue
> * Prepare our Output buffer
> */
> - job->dst.vb = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
> - prepare_buffer(ctx, &job->dst, job->dst.vb, false, true);
> + vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
> + fbuf = to_fdp1_buffer(vbuf);
> + job->dst = &fbuf->fields[0];
>
> job->active->vb->sequence = ctx->sequence;
> - job->dst.vb->sequence = ctx->sequence;
> + job->dst->vb->sequence = ctx->sequence;
> ctx->sequence++;
>
> if (FDP1_DEINT_MODE_USES_PREV(ctx->deint_mode)) {
> @@ -1318,14 +1234,14 @@ static struct fdp1_job *prepare_job(struct fdp1_ctx
> *ctx)
>
> if (FDP1_DEINT_MODE_USES_NEXT(ctx->deint_mode)) {
> /* Must be called after 'active' is dequeued */
> - job->next = peek_queued_buffer(ctx);
> + job->next = fdp1_peek_queued_field(ctx);
> }
>
> /* Transfer timestamps and flags from src->dst */
>
> - job->dst.vb->vb2_buf.timestamp = job->active->vb->vb2_buf.timestamp;
> + job->dst->vb->vb2_buf.timestamp = job->active->vb->vb2_buf.timestamp;
>
> - job->dst.vb->flags = job->active->vb->flags &
> + job->dst->vb->flags = job->active->vb->flags &
> V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
>
> /* Ideally, the frame-end function will just 'check' to see
> @@ -1351,9 +1267,8 @@ static void fdp1_m2m_device_run(void *priv)
> {
> struct fdp1_ctx *ctx = priv;
> struct fdp1_dev *fdp1 = ctx->fdp1;
> - struct fdp1_q_data *src_q_data = &ctx->out_q;
> struct vb2_v4l2_buffer *src_vb;
> - int fields = V4L2_FIELD_HAS_BOTH(src_q_data->format.field) ? 2 : 1;
> + struct fdp1_buffer *buf;
> unsigned int i;
>
> dprintk(fdp1, "+\n");
> @@ -1362,19 +1277,18 @@ static void fdp1_m2m_device_run(void *priv)
>
> /* Get our incoming buffer of either one or two fields, or one frame */
> src_vb = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
> + buf = to_fdp1_buffer(src_vb);
>
> - for (i = 0; i < fields; i++) {
> - struct fdp1_buffer *buf = fdp1_buffer_alloc(ctx);
> - bool last_field = (i+1 == fields);
> + for (i = 0; i < buf->num_fields; i++) {
> + struct fdp1_field_buffer *fbuf = &buf->fields[i];
>
> - prepare_buffer(ctx, buf, src_vb, i, last_field);
> - queue_buffer(ctx, buf);
> + fdp1_queue_field(ctx, fbuf);
> dprintk(fdp1, "Queued Buffer [%d] last_field:%d\n",
> - i, last_field);
> + i, fbuf->last_field);
> }
This is so much more elegant :D
>
> /* Queue as many jobs as our data provides for */
> - while (prepare_job(ctx))
> + while (fdp1_prepare_job(ctx))
> ;
>
> if (ctx->translen == 0) {
> @@ -1412,16 +1326,17 @@ static void device_frame_end(struct fdp1_dev *fdp1,
> ctx->num_processed++;
>
> /*
> - * fdp1_buffer_free will call buf_done only when the last vb2_buffer
> + * fdp1_field_complete will call buf_done only when the last vb2_buffer
> * reference is complete
> */
> if (FDP1_DEINT_MODE_USES_PREV(ctx->deint_mode))
> - fdp1_buffer_free(ctx, job->previous);
> + fdp1_field_complete(ctx, job->previous);
> else
> - fdp1_buffer_free(ctx, job->active);
> + fdp1_field_complete(ctx, job->active);
>
> spin_lock_irqsave(&fdp1->irqlock, flags);
> - v4l2_m2m_buf_done(job->dst.vb, state);
> + v4l2_m2m_buf_done(job->dst->vb, state);
> + job->dst = NULL;
> spin_unlock_irqrestore(&fdp1->irqlock, flags);
>
> /* Move this job back to the free job list */
> @@ -1875,15 +1790,84 @@ static int fdp1_queue_setup(struct vb2_queue *vq,
> return 0;
> }
>
> +/*
> + * prepare_buffer: Prepare an fdp1_buffer, from a vb2_v4l2_buffer
> + *
This function banner feels like it's saying the wrong thing now.
In fact - I don't think it's adding much value at all. perhaps easiest
to remove it. The buf_prepare is all quite self explanatory - and its
no longer part of serialising the fields. It's just preparing the
structures for use in the run() call.
> + * This helps us serialise buffers containing two fields into
> + * sequential top and bottom fields.
> + * Destination buffers also go through this function to
> + * set the vb and addrs in the same manner.
> + */
> +static void fdp1_buf_prepare_field(struct fdp1_q_data *q_data,
> + struct vb2_v4l2_buffer *vbuf,
> + unsigned int field_num)
> +{
> + struct fdp1_buffer *buf = to_fdp1_buffer(vbuf);
> + struct fdp1_field_buffer *fbuf = &buf->fields[field_num];
> + unsigned int num_fields;
> + unsigned int i;
> +
> + num_fields = V4L2_FIELD_HAS_BOTH(vbuf->field) ? 2 : 1;
> +
> + fbuf->vb = vbuf;
> + fbuf->last_field = (field_num + 1) == num_fields;
> +
> + for (i = 0; i < vbuf->vb2_buf.num_planes; ++i)
> + fbuf->addrs[i] = vb2_dma_contig_plane_dma_addr(&vbuf->vb2_buf,
> i);
> +
> + switch (vbuf->field) {
> + case V4L2_FIELD_INTERLACED:
> + /*
> + * Interlaced means bottom-top for 60Hz TV standards (NTSC) and
> + * top-bottom for 50Hz. As TV standards are not applicable to
> + * the mem-to-mem API, use the height as a heuristic.
> + */
> + fbuf->field = (q_data->format.height < 576) == field_num
> + ? V4L2_FIELD_TOP : V4L2_FIELD_BOTTOM;
> + break;
> + case V4L2_FIELD_INTERLACED_TB:
> + case V4L2_FIELD_SEQ_TB:
> + fbuf->field = field_num ? V4L2_FIELD_BOTTOM : V4L2_FIELD_TOP;
> + break;
> + case V4L2_FIELD_INTERLACED_BT:
> + case V4L2_FIELD_SEQ_BT:
> + fbuf->field = field_num ? V4L2_FIELD_TOP : V4L2_FIELD_BOTTOM;
> + break;
> + default:
> + fbuf->field = vbuf->field;
> + break;
> + }
> +
> + /* Buffer is completed */
> + if (!field_num)
> + return;
> +
> + /* Adjust buffer addresses for second field */
> + switch (vbuf->field) {
> + case V4L2_FIELD_INTERLACED:
> + case V4L2_FIELD_INTERLACED_TB:
> + case V4L2_FIELD_INTERLACED_BT:
> + for (i = 0; i < vbuf->vb2_buf.num_planes; i++)
> + fbuf->addrs[i] +=
> + (i == 0 ? q_data->stride_y : q_data->stride_c);
> + break;
> + case V4L2_FIELD_SEQ_TB:
> + case V4L2_FIELD_SEQ_BT:
> + for (i = 0; i < vbuf->vb2_buf.num_planes; i++)
> + fbuf->addrs[i] += q_data->vsize *
> + (i == 0 ? q_data->stride_y : q_data->stride_c);
> + break;
> + }
> +}
> +
> static int fdp1_buf_prepare(struct vb2_buffer *vb)
> {
> - struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
> struct fdp1_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
> - struct fdp1_q_data *q_data;
> + struct fdp1_q_data *q_data = get_q_data(ctx, vb->vb2_queue->type);
> + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
> + struct fdp1_buffer *buf = to_fdp1_buffer(vbuf);
> unsigned int i;
>
> - q_data = get_q_data(ctx, vb->vb2_queue->type);
> -
> if (V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type)) {
> bool field_valid = true;
>
> @@ -1936,6 +1920,10 @@ static int fdp1_buf_prepare(struct vb2_buffer *vb)
> vb2_set_plane_payload(vb, i, size);
> }
>
> + buf->num_fields = V4L2_FIELD_HAS_BOTH(vbuf->field) ? 2 : 1;
> + for (i = 0; i < buf->num_fields; ++i)
> + fdp1_buf_prepare_field(q_data, vbuf, i);
> +
Doing this here makes so much more sense.
> return 0;
> }
>
> @@ -2007,13 +1995,13 @@ static void fdp1_stop_streaming(struct vb2_queue *q)
> /* Empty Output queues */
> if (V4L2_TYPE_IS_OUTPUT(q->type)) {
> /* Empty our internal queues */
> - struct fdp1_buffer *b;
> + struct fdp1_field_buffer *fbuf;
>
> /* Free any queued buffers */
> - b = dequeue_buffer(ctx);
> - while (b != NULL) {
> - fdp1_buffer_free(ctx, b);
> - b = dequeue_buffer(ctx);
> + fbuf = fdp1_dequeue_field(ctx);
> + while (fbuf != NULL) {
> + fdp1_field_complete(ctx, fbuf);
> + fbuf = fdp1_dequeue_field(ctx);
> }
>
> /* Free smsk_data */
> @@ -2024,7 +2012,7 @@ static void fdp1_stop_streaming(struct vb2_queue *q)
> ctx->smsk_cpu = NULL;
> }
>
> - WARN(!list_empty(&ctx->fdp1_buffer_queue),
> + WARN(!list_empty(&ctx->fields_queue),
> "Buffer queue not empty");
> } else {
> /* Empty Capture queues (Jobs) */
> @@ -2033,17 +2021,18 @@ static void fdp1_stop_streaming(struct vb2_queue *q)
> job = get_queued_job(ctx->fdp1);
> while (job) {
> if (FDP1_DEINT_MODE_USES_PREV(ctx->deint_mode))
> - fdp1_buffer_free(ctx, job->previous);
> + fdp1_field_complete(ctx, job->previous);
> else
> - fdp1_buffer_free(ctx, job->active);
> + fdp1_field_complete(ctx, job->active);
>
> - v4l2_m2m_buf_done(job->dst.vb, VB2_BUF_STATE_ERROR);
> + v4l2_m2m_buf_done(job->dst->vb, VB2_BUF_STATE_ERROR);
> + job->dst = NULL;
>
> job = get_queued_job(ctx->fdp1);
> }
>
> /* Free any held buffer in the ctx */
> - fdp1_buffer_free(ctx, ctx->previous);
> + fdp1_field_complete(ctx, ctx->previous);
>
> WARN(!list_empty(&ctx->fdp1->queued_job_list),
> "Queued Job List not empty");
> @@ -2072,7 +2061,7 @@ static int queue_init(void *priv, struct vb2_queue
> *src_vq,
> src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
> src_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
> src_vq->drv_priv = ctx;
> - src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
> + src_vq->buf_struct_size = sizeof(struct fdp1_buffer);
> src_vq->ops = &fdp1_qops;
> src_vq->mem_ops = &vb2_dma_contig_memops;
> src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
> @@ -2086,7 +2075,7 @@ static int queue_init(void *priv, struct vb2_queue
> *src_vq,
> dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
> dst_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
> dst_vq->drv_priv = ctx;
> - dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
> + dst_vq->buf_struct_size = sizeof(struct fdp1_buffer);
> dst_vq->ops = &fdp1_qops;
> dst_vq->mem_ops = &vb2_dma_contig_memops;
> dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
> @@ -2105,7 +2094,6 @@ static int fdp1_open(struct file *file)
> struct v4l2_pix_format_mplane format;
> struct fdp1_ctx *ctx = NULL;
> struct v4l2_ctrl *ctrl;
> - unsigned int i;
> int ret = 0;
>
> if (mutex_lock_interruptible(&fdp1->dev_mutex))
> @@ -2122,12 +2110,7 @@ static int fdp1_open(struct file *file)
> ctx->fdp1 = fdp1;
>
> /* Initialise Queues */
> - INIT_LIST_HEAD(&ctx->free_buffers);
> - INIT_LIST_HEAD(&ctx->fdp1_buffer_queue);
> -
> - /* Initialise the buffers on the free list */
> - for (i = 0; i < ARRAY_SIZE(ctx->buffers); i++)
> - list_add(&ctx->buffers[i].list, &ctx->free_buffers);
> + INIT_LIST_HEAD(&ctx->fields_queue);
>
> ctx->translen = 1;
> ctx->sequence = 0;
>
--
Regards
Kieran Bingham
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