diff options
Diffstat (limited to 'drivers/gpu/drm/udl')
| -rw-r--r-- | drivers/gpu/drm/udl/udl_drv.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/gpu/drm/udl/udl_drv.c b/drivers/gpu/drm/udl/udl_drv.c index 4d02c46a9420..6e52069894b3 100644 --- a/drivers/gpu/drm/udl/udl_drv.c +++ b/drivers/gpu/drm/udl/udl_drv.c @@ -13,8 +13,21 @@ static struct drm_driver driver; +/* + * There are many DisplayLink-based graphics products, all with unique PIDs. + * So we match on DisplayLink's VID + Vendor-Defined Interface Class (0xff) + * We also require a match on SubClass (0x00) and Protocol (0x00), + * which is compatible with all known USB 2.0 era graphics chips and firmware, + * but allows DisplayLink to increment those for any future incompatible chips + */ static struct usb_device_id id_table[] = { - {.idVendor = 0x17e9, .match_flags = USB_DEVICE_ID_MATCH_VENDOR,}, + {.idVendor = 0x17e9, .bInterfaceClass = 0xff, + .bInterfaceSubClass = 0x00, + .bInterfaceProtocol = 0x00, + .match_flags = USB_DEVICE_ID_MATCH_VENDOR | + USB_DEVICE_ID_MATCH_INT_CLASS | + USB_DEVICE_ID_MATCH_INT_SUBCLASS | + USB_DEVICE_ID_MATCH_INT_PROTOCOL,}, {}, }; MODULE_DEVICE_TABLE(usb, id_table); |
