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Subject: media: ngene: add proper polling to the dvbdev_ci file ops
Author: Daniel Scheller <d.schel...@gmx.net>
Date: Sun Feb 25 12:06:56 2018 -0500
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.schel...@gmx.net>
Signed-off-by: Mauro Carvalho Chehab <mche...@s-opensource.com>
drivers/media/pci/ngene/ngene-dvb.c | 29 ++++++++++++++++++++++++++---
1 file 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,
};
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