diff options
| author | Daniel Scheller <d.scheller@gmx.net> | 2018-02-25 12:06:56 -0500 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2018-03-06 11:19:58 -0500 |
| commit | 6294513dbe61ba0ab1d9201cd3b283fe1cfc7617 (patch) | |
| tree | 0d4aee8353245be1c343417e217bb5ff0a3b935e | |
| parent | 96c7bc8c7e9ddbc3887e6f9dc3079d5ab896a3a3 (diff) | |
| download | linux-6294513dbe61ba0ab1d9201cd3b283fe1cfc7617.tar.bz2 | |
media: ngene: add proper polling to the dvbdev_ci file ops
Implement the poll callback for the dvbdev_ci file ops. The ts_poll()
function queries the DVB ring buffers for available data and space, and
reports this as appropriate. Also, set the dvb_device readers, writers
and users to proper values (one reader, one writer, two users).
This fixes the raw CI TS transport in conjunction with TVheadend's
DDCI functionality.
Signed-off-by: Daniel Scheller <d.scheller@gmx.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
| -rw-r--r-- | drivers/media/pci/ngene/ngene-dvb.c | 29 |
1 files changed, 26 insertions, 3 deletions
diff --git a/drivers/media/pci/ngene/ngene-dvb.c b/drivers/media/pci/ngene/ngene-dvb.c index f71fd41c762c..65c79f1b36f7 100644 --- a/drivers/media/pci/ngene/ngene-dvb.c +++ b/drivers/media/pci/ngene/ngene-dvb.c @@ -84,18 +84,41 @@ static ssize_t ts_read(struct file *file, char __user *buf, return count; } +static __poll_t ts_poll(struct file *file, poll_table *wait) +{ + struct dvb_device *dvbdev = file->private_data; + struct ngene_channel *chan = dvbdev->priv; + struct ngene *dev = chan->dev; + struct dvb_ringbuffer *rbuf = &dev->tsin_rbuf; + struct dvb_ringbuffer *wbuf = &dev->tsout_rbuf; + __poll_t mask = 0; + + poll_wait(file, &rbuf->queue, wait); + poll_wait(file, &wbuf->queue, wait); + + if (!dvb_ringbuffer_empty(rbuf)) + mask |= EPOLLIN | EPOLLRDNORM; + if (dvb_ringbuffer_free(wbuf) >= 188) + mask |= EPOLLOUT | EPOLLWRNORM; + + return mask; +} + static const struct file_operations ci_fops = { .owner = THIS_MODULE, .read = ts_read, .write = ts_write, .open = dvb_generic_open, .release = dvb_generic_release, + .poll = ts_poll, + .mmap = NULL, }; struct dvb_device ngene_dvbdev_ci = { - .readers = -1, - .writers = -1, - .users = -1, + .priv = NULL, + .readers = 1, + .writers = 1, + .users = 2, .fops = &ci_fops, }; |