diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2011-12-30 18:26:53 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-01-06 09:05:01 -0200 |
| commit | 2d39059a656c0d0f61cfee8225f3d222dac7f3ac (patch) | |
| tree | 6e8a5009a07d3ac04531b888894cbca0283e5e1f /drivers/media/video/gspca/gspca.c | |
| parent | 5dae603d84ff5b6b24186b521f4353b3860b11e2 (diff) | |
[media] gspca - main: Avoid clobbering all bandwidth when mic in webcam
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jean-François Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/gspca/gspca.c')
| -rw-r--r-- | drivers/media/video/gspca/gspca.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c index 338dae448787..4a3bbffafcd4 100644 --- a/drivers/media/video/gspca/gspca.c +++ b/drivers/media/video/gspca/gspca.c @@ -726,6 +726,23 @@ static int build_isoc_ep_tb(struct gspca_dev *gspca_dev, ep_tb++; } + /* + * If the camera: + * has a usb audio class interface (a built in usb mic); and + * is a usb 1 full speed device; and + * uses the max full speed iso bandwidth; and + * and has more than 1 alt setting + * then skip the highest alt setting to spare bandwidth for the mic + */ + if (gspca_dev->audio && + gspca_dev->dev->speed == USB_SPEED_FULL && + last_bw >= 1000000 && + i > 1) { + PDEBUG(D_STREAM, "dev has usb audio, skipping highest alt"); + i--; + ep_tb--; + } + /* get the requested bandwidth and start at the highest atlsetting */ bandwidth = which_bandwidth(gspca_dev); ep_tb--; |