Hi Hans,
On Friday 10 October 2014 10:04:58 Hans Verkuil wrote:
> (This patch is from Divneil except for the vivid changes which I added. He
> had difficulties posting the patch without the mailer mangling it, so I'm
> reposting it for him)
>
> - vb2 drivers to rely on VB2_MAX_FRAME.
>
> - VB2_MAX_FRAME bumps the value to 64 from current 32
Just curious, in which use case(s) is 32 frames too little ?
By the way, should we discuss at some point a way to remove that limitation
and manage buffers fully dynamically ? That's something we would need for a
VIDIOC_DELETE_BUFS ioctl.
> Signed-off-by: Divneil Wadhawan <divneil.wadhawan@xxxxxx>
> Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
> ---
> drivers/media/pci/saa7134/saa7134-ts.c | 4 ++--
> drivers/media/pci/saa7134/saa7134-vbi.c | 4 ++--
> drivers/media/pci/saa7134/saa7134-video.c | 2 +-
> drivers/media/platform/mem2mem_testdev.c | 2 +-
> drivers/media/platform/ti-vpe/vpe.c | 2 +-
> drivers/media/platform/vivid/vivid-core.h | 2 +-
> drivers/media/platform/vivid/vivid-ctrls.c | 2 +-
> drivers/media/platform/vivid/vivid-vid-cap.c | 2 +-
> drivers/media/v4l2-core/videobuf2-core.c | 8 ++++----
> include/media/videobuf2-core.h | 4 +++-
> 10 files changed, 17 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/media/pci/saa7134/saa7134-ts.c
> b/drivers/media/pci/saa7134/saa7134-ts.c index bd25323..0d04995 100644
> --- a/drivers/media/pci/saa7134/saa7134-ts.c
> +++ b/drivers/media/pci/saa7134/saa7134-ts.c
> @@ -227,8 +227,8 @@ int saa7134_ts_init1(struct saa7134_dev *dev)
> /* sanitycheck insmod options */
> if (tsbufs < 2)
> tsbufs = 2;
> - if (tsbufs > VIDEO_MAX_FRAME)
> - tsbufs = VIDEO_MAX_FRAME;
> + if (tsbufs > VB2_MAX_FRAME)
> + tsbufs = VB2_MAX_FRAME;
> if (ts_nr_packets < 4)
> ts_nr_packets = 4;
> if (ts_nr_packets > 312)
> diff --git a/drivers/media/pci/saa7134/saa7134-vbi.c
> b/drivers/media/pci/saa7134/saa7134-vbi.c index 4f0b101..2269837 100644
> --- a/drivers/media/pci/saa7134/saa7134-vbi.c
> +++ b/drivers/media/pci/saa7134/saa7134-vbi.c
> @@ -203,8 +203,8 @@ int saa7134_vbi_init1(struct saa7134_dev *dev)
>
> if (vbibufs < 2)
> vbibufs = 2;
> - if (vbibufs > VIDEO_MAX_FRAME)
> - vbibufs = VIDEO_MAX_FRAME;
> + if (vbibufs > VB2_MAX_FRAME)
> + vbibufs = VB2_MAX_FRAME;
> return 0;
> }
>
> diff --git a/drivers/media/pci/saa7134/saa7134-video.c
> b/drivers/media/pci/saa7134/saa7134-video.c index fc4a427..c7f39be 100644
> --- a/drivers/media/pci/saa7134/saa7134-video.c
> +++ b/drivers/media/pci/saa7134/saa7134-video.c
> @@ -2030,7 +2030,7 @@ int saa7134_video_init1(struct saa7134_dev *dev)
> int ret;
>
> /* sanitycheck insmod options */
> - if (gbuffers < 2 || gbuffers > VIDEO_MAX_FRAME)
> + if (gbuffers < 2 || gbuffers > VB2_MAX_FRAME)
> gbuffers = 2;
> if (gbufsize > gbufsize_max)
> gbufsize = gbufsize_max;
> diff --git a/drivers/media/platform/mem2mem_testdev.c
> b/drivers/media/platform/mem2mem_testdev.c index c1b03cf..e1ff7e0 100644
> --- a/drivers/media/platform/mem2mem_testdev.c
> +++ b/drivers/media/platform/mem2mem_testdev.c
> @@ -55,7 +55,7 @@ MODULE_PARM_DESC(debug, "activates debug info");
> #define MEM2MEM_NAME "m2m-testdev"
>
> /* Per queue */
> -#define MEM2MEM_DEF_NUM_BUFS VIDEO_MAX_FRAME
> +#define MEM2MEM_DEF_NUM_BUFS VB2_MAX_FRAME
> /* In bytes, per queue */
> #define MEM2MEM_VID_MEM_LIMIT (16 * 1024 * 1024)
>
> diff --git a/drivers/media/platform/ti-vpe/vpe.c
> b/drivers/media/platform/ti-vpe/vpe.c index 9a081c2..04e37c0 100644
> --- a/drivers/media/platform/ti-vpe/vpe.c
> +++ b/drivers/media/platform/ti-vpe/vpe.c
> @@ -1971,7 +1971,7 @@ static const struct v4l2_ctrl_config vpe_bufs_per_job
> = { .type = V4L2_CTRL_TYPE_INTEGER,
> .def = VPE_DEF_BUFS_PER_JOB,
> .min = 1,
> - .max = VIDEO_MAX_FRAME,
> + .max = VB2_MAX_FRAME,
> .step = 1,
> };
>
> diff --git a/drivers/media/platform/vivid/vivid-core.h
> b/drivers/media/platform/vivid/vivid-core.h index 811c286..c0375a1 100644
> --- a/drivers/media/platform/vivid/vivid-core.h
> +++ b/drivers/media/platform/vivid/vivid-core.h
> @@ -346,7 +346,7 @@ struct vivid_dev {
> /* video capture */
> struct tpg_data tpg;
> unsigned ms_vid_cap;
> - bool must_blank[VIDEO_MAX_FRAME];
> + bool must_blank[VB2_MAX_FRAME];
>
> const struct vivid_fmt *fmt_cap;
> struct v4l2_fract timeperframe_vid_cap;
> diff --git a/drivers/media/platform/vivid/vivid-ctrls.c
> b/drivers/media/platform/vivid/vivid-ctrls.c index d5cbf00..7162f97 100644
> --- a/drivers/media/platform/vivid/vivid-ctrls.c
> +++ b/drivers/media/platform/vivid/vivid-ctrls.c
> @@ -332,7 +332,7 @@ static int vivid_vid_cap_s_ctrl(struct v4l2_ctrl *ctrl)
> break;
> case VIVID_CID_PERCENTAGE_FILL:
> tpg_s_perc_fill(&dev->tpg, ctrl->val);
> - for (i = 0; i < VIDEO_MAX_FRAME; i++)
> + for (i = 0; i < VB2_MAX_FRAME; i++)
> dev->must_blank[i] = ctrl->val < 100;
> break;
> case VIVID_CID_INSERT_SAV:
> diff --git a/drivers/media/platform/vivid/vivid-vid-cap.c
> b/drivers/media/platform/vivid/vivid-vid-cap.c index 331c544..55e8158
> 100644
> --- a/drivers/media/platform/vivid/vivid-vid-cap.c
> +++ b/drivers/media/platform/vivid/vivid-vid-cap.c
> @@ -252,7 +252,7 @@ static int vid_cap_start_streaming(struct vb2_queue *vq,
> unsigned count)
>
> dev->vid_cap_seq_count = 0;
> dprintk(dev, 1, "%s\n", __func__);
> - for (i = 0; i < VIDEO_MAX_FRAME; i++)
> + for (i = 0; i < VB2_MAX_FRAME; i++)
> dev->must_blank[i] = tpg_g_perc_fill(&dev->tpg) < 100;
> if (dev->start_streaming_error) {
> dev->start_streaming_error = false;
> diff --git a/drivers/media/v4l2-core/videobuf2-core.c
> b/drivers/media/v4l2-core/videobuf2-core.c index 15b02f9..60354b4 100644
> --- a/drivers/media/v4l2-core/videobuf2-core.c
> +++ b/drivers/media/v4l2-core/videobuf2-core.c
> @@ -911,7 +911,7 @@ static int __reqbufs(struct vb2_queue *q, struct
> v4l2_requestbuffers *req) /*
> * Make sure the requested values and current defaults are sane.
> */
> - num_buffers = min_t(unsigned int, req->count, VIDEO_MAX_FRAME);
> + num_buffers = min_t(unsigned int, req->count, VB2_MAX_FRAME);
> num_buffers = max_t(unsigned int, num_buffers, q->min_buffers_needed);
> memset(q->plane_sizes, 0, sizeof(q->plane_sizes));
> memset(q->alloc_ctx, 0, sizeof(q->alloc_ctx));
> @@ -1015,7 +1015,7 @@ static int __create_bufs(struct vb2_queue *q, struct
> v4l2_create_buffers *create unsigned int num_planes = 0, num_buffers,
> allocated_buffers;
> int ret;
>
> - if (q->num_buffers == VIDEO_MAX_FRAME) {
> + if (q->num_buffers == VB2_MAX_FRAME) {
> dprintk(1, "maximum number of buffers already allocated\n");
> return -ENOBUFS;
> }
> @@ -1026,7 +1026,7 @@ static int __create_bufs(struct vb2_queue *q, struct
> v4l2_create_buffers *create q->memory = create->memory;
> }
>
> - num_buffers = min(create->count, VIDEO_MAX_FRAME - q->num_buffers);
> + num_buffers = min(create->count, VB2_MAX_FRAME - q->num_buffers);
>
> /*
> * Ask the driver, whether the requested number of buffers, planes per
> @@ -2725,7 +2725,7 @@ struct vb2_fileio_data {
> struct v4l2_requestbuffers req;
> struct v4l2_plane p;
> struct v4l2_buffer b;
> - struct vb2_fileio_buf bufs[VIDEO_MAX_FRAME];
> + struct vb2_fileio_buf bufs[VB2_MAX_FRAME];
> unsigned int cur_index;
> unsigned int initial_index;
> unsigned int q_count;
> diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h
> index a8608ce..66dcc40 100644
> --- a/include/media/videobuf2-core.h
> +++ b/include/media/videobuf2-core.h
> @@ -18,6 +18,8 @@
> #include <linux/videodev2.h>
> #include <linux/dma-buf.h>
>
> +#define VB2_MAX_FRAME 64
> +
> struct vb2_alloc_ctx;
> struct vb2_fileio_data;
> struct vb2_threadio_data;
> @@ -402,7 +404,7 @@ struct vb2_queue {
> /* private: internal use only */
> struct mutex mmap_lock;
> enum v4l2_memory memory;
> - struct vb2_buffer *bufs[VIDEO_MAX_FRAME];
> + struct vb2_buffer *bufs[VB2_MAX_FRAME];
> unsigned int num_buffers;
>
> struct list_head queued_list;
--
Regards,
Laurent Pinchart
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