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authorDave Airlie <airlied@redhat.com>2012-06-16 07:41:28 +0100
committerDave Airlie <airlied@redhat.com>2012-06-16 11:09:58 +0100
commite5a867a51d9b009f90d5dca6a320608e4e8a37ec (patch)
tree3af406e9a86714b4bc61598ed9f4316b732fa596 /drivers/gpu
parent9b15b817f3d62409290fd56fe3cbb076a931bb0a (diff)
downloadop-kernel-dev-e5a867a51d9b009f90d5dca6a320608e4e8a37ec.zip
op-kernel-dev-e5a867a51d9b009f90d5dca6a320608e4e8a37ec.tar.gz
drm/udl: only bind to the video devices on the hub.
This is ported from udlfb. Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=832188 Cc: stable@vger.kernel.org Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/udl/udl_drv.c15
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 4d02c46..6e52069 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);
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