diff options
| author | Jean-François Moine <moinejf@free.fr> | 2010-07-14 06:30:18 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-08-02 16:43:06 -0300 |
| commit | 35680baa6822df98a6ed602e2380aa0a04e18b07 (patch) | |
| tree | ee4ebc67f847f67ebd068248187f62958dcb19ab | |
| parent | c4dc692ce6212f4513c39dfcde725aab438a2940 (diff) | |
V4L/DVB: gspca - main: Handle the audio device
When there is an audio device, use a lower alternate setting.
This patch does not fix correctly all audio and bandwidth problems.
Signed-off-by: Jean-François Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| -rw-r--r-- | drivers/media/video/gspca/gspca.c | 22 | ||||
| -rw-r--r-- | drivers/media/video/gspca/gspca.h | 3 |
2 files changed, 24 insertions, 1 deletions
diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c index 29b04794282..d951b0f0e05 100644 --- a/drivers/media/video/gspca/gspca.c +++ b/drivers/media/video/gspca/gspca.c @@ -640,12 +640,16 @@ static struct usb_host_endpoint *get_ep(struct gspca_dev *gspca_dev) : USB_ENDPOINT_XFER_ISOC; i = gspca_dev->alt; /* previous alt setting */ if (gspca_dev->cam.reverse_alts) { + if (gspca_dev->audio) + i++; while (++i < gspca_dev->nbalt) { ep = alt_xfer(&intf->altsetting[i], xfer); if (ep) break; } } else { + if (gspca_dev->audio) + i--; while (--i >= 0) { ep = alt_xfer(&intf->altsetting[i], xfer); if (ep) @@ -2146,6 +2150,24 @@ int gspca_dev_probe2(struct usb_interface *intf, gspca_dev->dev = dev; gspca_dev->iface = intf->cur_altsetting->desc.bInterfaceNumber; gspca_dev->nbalt = intf->num_altsetting; + + /* check if any audio device */ + if (dev->config->desc.bNumInterfaces != 1) { + int i; + struct usb_interface *intf2; + + for (i = 0; i < dev->config->desc.bNumInterfaces; i++) { + intf2 = dev->config->interface[i]; + if (intf2 != NULL + && intf2->altsetting != NULL + && intf2->altsetting->desc.bInterfaceClass == + USB_CLASS_AUDIO) { + gspca_dev->audio = 1; + break; + } + } + } + gspca_dev->sd_desc = sd_desc; gspca_dev->nbufread = 2; gspca_dev->empty_packet = -1; /* don't check the empty packets */ diff --git a/drivers/media/video/gspca/gspca.h b/drivers/media/video/gspca/gspca.h index 17e55580631..b749c36d9f7 100644 --- a/drivers/media/video/gspca/gspca.h +++ b/drivers/media/video/gspca/gspca.h @@ -198,6 +198,7 @@ struct gspca_dev { struct mutex read_lock; /* read protection */ struct mutex queue_lock; /* ISOC queue protection */ int usb_err; /* USB error - protected by usb_lock */ + u16 pkt_size; /* ISOC packet size */ #ifdef CONFIG_PM char frozen; /* suspend - resume */ #endif @@ -208,7 +209,7 @@ struct gspca_dev { __u8 iface; /* USB interface number */ __u8 alt; /* USB alternate setting */ __u8 nbalt; /* number of USB alternate settings */ - u16 pkt_size; /* ISOC packet size */ + u8 audio; /* presence of audio device */ }; int gspca_dev_probe(struct usb_interface *intf, |