diff options
| author | Frank Schaefer <fschaefer.oss@googlemail.com> | 2012-11-08 18:11:52 +0100 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-12-22 21:17:52 +0100 |
| commit | c647a91a2558c4031eddd013e5860ca5a41363a7 (patch) | |
| tree | 90a0b103355b59ef61fa7d2f88a6ec78e24e189b /drivers/media/usb/em28xx/em28xx-video.c | |
| parent | [media] em28xx: set USB alternate settings for analog video bulk transfers pr... (diff) | |
| download | linux-c647a91a2558c4031eddd013e5860ca5a41363a7.tar.xz linux-c647a91a2558c4031eddd013e5860ca5a41363a7.zip | |
[media] em28xx: improve USB endpoint logic, also use bulk transfers
The current enpoint logic ignores all bulk endpoints and uses
a fixed mapping between endpint addresses and the supported
data stream types (analog/audio/DVB):
Ep 0x82, isoc => analog
Ep 0x83, isoc => audio
Ep 0x84, isoc => DVB
Now that the code can also do bulk transfers, the endpoint
logic has to be extended to also consider bulk endpoints.
The new logic preserves backwards compatibility and reflects
the endpoint configurations we have seen so far:
Ep 0x82, isoc => analog
Ep 0x82, bulk => analog
Ep 0x83, isoc* => audio
Ep 0x84, isoc => digital
Ep 0x84, bulk => analog or digital**
(*: audio should always be isoc)
(**: analog, if ep 0x82 is isoc, otherwise digital)
[mchehab@redhat.com: Fix a CodingStyle issue: don't break strings
into separate lines]
Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/usb/em28xx/em28xx-video.c')
| -rw-r--r-- | drivers/media/usb/em28xx/em28xx-video.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/media/usb/em28xx/em28xx-video.c b/drivers/media/usb/em28xx/em28xx-video.c index d9c15b6da1af..c7e23dd73b88 100644 --- a/drivers/media/usb/em28xx/em28xx-video.c +++ b/drivers/media/usb/em28xx/em28xx-video.c @@ -788,16 +788,18 @@ buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb, if (urb_init) { if (em28xx_vbi_supported(dev) == 1) - rc = em28xx_init_usb_xfer(dev, EM28XX_ANALOG_MODE, 0, + rc = em28xx_init_usb_xfer(dev, EM28XX_ANALOG_MODE, + dev->analog_xfer_bulk, EM28XX_NUM_BUFS, dev->max_pkt_size, - EM28XX_NUM_ISOC_PACKETS, + dev->packet_multiplier, em28xx_urb_data_copy_vbi); else - rc = em28xx_init_usb_xfer(dev, EM28XX_ANALOG_MODE, 0, + rc = em28xx_init_usb_xfer(dev, EM28XX_ANALOG_MODE, + dev->analog_xfer_bulk, EM28XX_NUM_BUFS, dev->max_pkt_size, - EM28XX_NUM_ISOC_PACKETS, + dev->packet_multiplier, em28xx_urb_data_copy); if (rc < 0) goto fail; |