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V4L/DVB (13866): gspca - main: Add the cam flag 'no_urb_create'.

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This flag permits subdrivers to create specific transfer URBs.

Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Jean-Francois Moine 2009-12-15 05:23:04 -03:00 committed by Mauro Carvalho Chehab
parent db870875c0
commit 47aaca961f
2 changed files with 14 additions and 10 deletions
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13
drivers/media/video/gspca/gspca.c
View File

@ -607,11 +607,14 @@ static int gspca_init_transfer(struct gspca_dev *gspca_dev)
goto out;
}
for (;;) {
PDEBUG(D_STREAM, "init transfer alt %d", gspca_dev->alt);
ret = create_urbs(gspca_dev, ep);
if (ret < 0) {
destroy_urbs(gspca_dev);
goto out;
if (!gspca_dev->cam.no_urb_create) {
PDEBUG(D_STREAM, "init transfer alt %d",
gspca_dev->alt);
ret = create_urbs(gspca_dev, ep);
if (ret < 0) {
destroy_urbs(gspca_dev);
goto out;
}
}
/* clear the bulk endpoint */

11
drivers/media/video/gspca/gspca.h
View File

@ -54,20 +54,21 @@ struct framerates {
/* device information - set at probe time */
struct cam {
int bulk_size; /* buffer size when image transfer by bulk */
const struct v4l2_pix_format *cam_mode; /* size nmodes */
char nmodes;
const struct framerates *mode_framerates; /* must have size nmode,
* just like cam_mode */
__u8 bulk_nurbs; /* number of URBs in bulk mode
u32 bulk_size; /* buffer size when image transfer by bulk */
u32 input_flags; /* value for ENUM_INPUT status flags */
u8 nmodes; /* size of cam_mode */
u8 no_urb_create; /* don't create transfer URBs */
u8 bulk_nurbs; /* number of URBs in bulk mode
* - cannot be > MAX_NURBS
* - when 0 and bulk_size != 0 means
* 1 URB and submit done by subdriver */
u8 bulk; /* image transfer by 0:isoc / 1:bulk */
u8 npkt; /* number of packets in an ISOC message
* 0 is the default value: 32 packets */
u32 input_flags; /* value for ENUM_INPUT status flags */
char reverse_alts; /* Alt settings are in high to low order */
u8 reverse_alts; /* Alt settings are in high to low order */
};
struct gspca_dev;