diff options
Diffstat (limited to 'drivers/video/udlfb.c')
| -rw-r--r-- | drivers/video/udlfb.c | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/drivers/video/udlfb.c b/drivers/video/udlfb.c index 101846c2084a..3473e75ce785 100644 --- a/drivers/video/udlfb.c +++ b/drivers/video/udlfb.c @@ -48,13 +48,22 @@ static const u32 udlfb_info_flags = FBINFO_DEFAULT | FBINFO_READS_FAST | FBINFO_HWACCEL_COPYAREA | FBINFO_MISC_ALWAYS_SETPAR; /* - * There are many DisplayLink-based products, all with unique PIDs. We are able - * to support all volume ones (circa 2009) with a single driver, so we match - * globally on VID. TODO: Probe() needs to detect when we might be running - * "future" chips, and bail on those, so a compatible driver can match. + * 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); @@ -1613,7 +1622,7 @@ static int dlfb_usb_probe(struct usb_interface *interface, /* We don't register a new USB class. Our client interface is fbdev */ /* allocates framebuffer driver structure, not framebuffer memory */ - info = framebuffer_alloc(0, &usbdev->dev); + info = framebuffer_alloc(0, &interface->dev); if (!info) { retval = -ENOMEM; pr_err("framebuffer_alloc failed\n"); |