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V4L/DVB (11944): uvcvideo: Add generic control blacklist.

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Another device (5986:0241) has been reported to advertise a UVC control it
does not support. Rework the control blacklist to match devices by their
VID:PID instead of trying to be clever about which controls might not be
supported properly.

Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Laurent Pinchart 2009-05-31 17:05:55 -03:00 committed by Mauro Carvalho Chehab
parent 926b3b4122
commit d732c44c1a
3 changed files with 16 additions and 23 deletions
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35
drivers/media/video/uvc/uvc_ctrl.c
View File

@ -1372,21 +1372,19 @@ end:
}
/*
* Prune an entity of its bogus controls. This currently includes processing
* unit auto controls for which no corresponding manual control is available.
* Such auto controls make little sense if any, and are known to crash at
* least the SiGma Micro webcam.
* Prune an entity of its bogus controls using a blacklist. Bogus controls
* are currently the ones that crash the camera or unconditionally return an
* error when queried.
*/
static void
uvc_ctrl_prune_entity(struct uvc_entity *entity)
uvc_ctrl_prune_entity(struct uvc_device *dev, struct uvc_entity *entity)
{
static const struct {
u8 idx_manual;
u8 idx_auto;
struct usb_device_id id;
u8 index;
} blacklist[] = {
{ 2, 11 }, /* Hue */
{ 6, 12 }, /* White Balance Temperature */
{ 7, 13 }, /* White Balance Component */
{ { USB_DEVICE(0x1c4f, 0x3000) }, 6 }, /* WB Temperature */
{ { USB_DEVICE(0x5986, 0x0241) }, 2 }, /* Hue */
};
u8 *controls;
@ -1400,19 +1398,17 @@ uvc_ctrl_prune_entity(struct uvc_entity *entity)
size = entity->processing.bControlSize;
for (i = 0; i < ARRAY_SIZE(blacklist); ++i) {
if (blacklist[i].idx_auto >= 8 * size ||
blacklist[i].idx_manual >= 8 * size)
if (!usb_match_id(dev->intf, &blacklist[i].id))
continue;
if (!uvc_test_bit(controls, blacklist[i].idx_auto) ||
uvc_test_bit(controls, blacklist[i].idx_manual))
if (blacklist[i].index >= 8 * size ||
!uvc_test_bit(controls, blacklist[i].index))
continue;
uvc_trace(UVC_TRACE_CONTROL, "Auto control %u/%u has no "
"matching manual control, removing it.\n", entity->id,
blacklist[i].idx_auto);
uvc_trace(UVC_TRACE_CONTROL, "%u/%u control is black listed, "
"removing it.\n", entity->id, blacklist[i].index);
uvc_clear_bit(controls, blacklist[i].idx_auto);
uvc_clear_bit(controls, blacklist[i].index);
}
}
@ -1442,8 +1438,7 @@ int uvc_ctrl_init_device(struct uvc_device *dev)
bControlSize = entity->camera.bControlSize;
}
if (dev->quirks & UVC_QUIRK_PRUNE_CONTROLS)
uvc_ctrl_prune_entity(entity);
uvc_ctrl_prune_entity(dev, entity);
for (i = 0; i < bControlSize; ++i)
ncontrols += hweight8(bmControls[i]);

3
drivers/media/video/uvc/uvc_driver.c
View File

@ -1946,8 +1946,7 @@ static struct usb_device_id uvc_ids[] = {
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = UVC_QUIRK_PROBE_MINMAX
| UVC_QUIRK_IGNORE_SELECTOR_UNIT
| UVC_QUIRK_PRUNE_CONTROLS },
| UVC_QUIRK_IGNORE_SELECTOR_UNIT },
/* Generic USB Video Class */
{ USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, 0) },
{}

1
drivers/media/video/uvc/uvcvideo.h
View File

@ -313,7 +313,6 @@ struct uvc_xu_control {
#define UVC_QUIRK_BUILTIN_ISIGHT 0x00000008
#define UVC_QUIRK_STREAM_NO_FID 0x00000010
#define UVC_QUIRK_IGNORE_SELECTOR_UNIT 0x00000020
#define UVC_QUIRK_PRUNE_CONTROLS 0x00000040
#define UVC_QUIRK_FIX_BANDWIDTH 0x00000080
/* Format flags */