diff options
author | Hans Verkuil <hans.verkuil@cisco.com> | 2011-07-13 11:26:52 +0400 |
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committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-03-27 18:41:48 +0400 |
commit | 95213ceb1b527b8102c589bd41fcb7c9163fdd79 (patch) | |
tree | 8a3d5e85a4e39d5cba9de07237fc8ff293758845 /drivers/media/video/videobuf2-core.c | |
parent | 0e17e9a9f6bfedb6aefcd88632f5d6d17c871176 (diff) | |
download | linux-95213ceb1b527b8102c589bd41fcb7c9163fdd79.tar.xz |
[media] videobuf2-core: also test for pending events
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Pawel Osciak <pawel@osciak.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/videobuf2-core.c')
-rw-r--r-- | drivers/media/video/videobuf2-core.c | 41 |
1 files changed, 28 insertions, 13 deletions
diff --git a/drivers/media/video/videobuf2-core.c b/drivers/media/video/videobuf2-core.c index 0b1c77114e83..3786d88183eb 100644 --- a/drivers/media/video/videobuf2-core.c +++ b/drivers/media/video/videobuf2-core.c @@ -19,6 +19,9 @@ #include <linux/slab.h> #include <linux/sched.h> +#include <media/v4l2-dev.h> +#include <media/v4l2-fh.h> +#include <media/v4l2-event.h> #include <media/videobuf2-core.h> static int debug; @@ -1642,15 +1645,28 @@ static int __vb2_cleanup_fileio(struct vb2_queue *q); * For OUTPUT queues, if a buffer is ready to be dequeued, the file descriptor * will be reported as available for writing. * + * If the driver uses struct v4l2_fh, then vb2_poll() will also check for any + * pending events. + * * The return values from this function are intended to be directly returned * from poll handler in driver. */ unsigned int vb2_poll(struct vb2_queue *q, struct file *file, poll_table *wait) { + struct video_device *vfd = video_devdata(file); unsigned long req_events = poll_requested_events(wait); - unsigned long flags; - unsigned int ret; struct vb2_buffer *vb = NULL; + unsigned int res = 0; + unsigned long flags; + + if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) { + struct v4l2_fh *fh = file->private_data; + + if (v4l2_event_pending(fh)) + res = POLLPRI; + else if (req_events & POLLPRI) + poll_wait(file, &fh->wait, wait); + } /* * Start file I/O emulator only if streaming API has not been used yet. @@ -1658,19 +1674,17 @@ unsigned int vb2_poll(struct vb2_queue *q, struct file *file, poll_table *wait) if (q->num_buffers == 0 && q->fileio == NULL) { if (!V4L2_TYPE_IS_OUTPUT(q->type) && (q->io_modes & VB2_READ) && (req_events & (POLLIN | POLLRDNORM))) { - ret = __vb2_init_fileio(q, 1); - if (ret) - return POLLERR; + if (__vb2_init_fileio(q, 1)) + return res | POLLERR; } if (V4L2_TYPE_IS_OUTPUT(q->type) && (q->io_modes & VB2_WRITE) && (req_events & (POLLOUT | POLLWRNORM))) { - ret = __vb2_init_fileio(q, 0); - if (ret) - return POLLERR; + if (__vb2_init_fileio(q, 0)) + return res | POLLERR; /* * Write to OUTPUT queue can be done immediately. */ - return POLLOUT | POLLWRNORM; + return res | POLLOUT | POLLWRNORM; } } @@ -1678,7 +1692,7 @@ unsigned int vb2_poll(struct vb2_queue *q, struct file *file, poll_table *wait) * There is nothing to wait for if no buffers have already been queued. */ if (list_empty(&q->queued_list)) - return POLLERR; + return res | POLLERR; poll_wait(file, &q->done_wq, wait); @@ -1693,10 +1707,11 @@ unsigned int vb2_poll(struct vb2_queue *q, struct file *file, poll_table *wait) if (vb && (vb->state == VB2_BUF_STATE_DONE || vb->state == VB2_BUF_STATE_ERROR)) { - return (V4L2_TYPE_IS_OUTPUT(q->type)) ? POLLOUT | POLLWRNORM : - POLLIN | POLLRDNORM; + return (V4L2_TYPE_IS_OUTPUT(q->type)) ? + res | POLLOUT | POLLWRNORM : + res | POLLIN | POLLRDNORM; } - return 0; + return res; } EXPORT_SYMBOL_GPL(vb2_poll); |