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Diffstat (limited to 'drivers/hid/hid-elo.c')
-rw-r--r--drivers/hid/hid-elo.c35
1 files changed, 34 insertions, 1 deletions
diff --git a/drivers/hid/hid-elo.c b/drivers/hid/hid-elo.c
index f042a6cf8b18..4e49462870ab 100644
--- a/drivers/hid/hid-elo.c
+++ b/drivers/hid/hid-elo.c
@@ -181,7 +181,40 @@ fail:
*/
static bool elo_broken_firmware(struct usb_device *dev)
{
- return use_fw_quirk && le16_to_cpu(dev->descriptor.bcdDevice) == 0x10d;
+ struct usb_device *hub = dev->parent;
+ struct usb_device *child = NULL;
+ u16 fw_lvl = le16_to_cpu(dev->descriptor.bcdDevice);
+ u16 child_vid, child_pid;
+ int i;
+
+ if (!use_fw_quirk)
+ return false;
+ if (fw_lvl != 0x10d)
+ return false;
+
+ /* iterate sibling devices of the touch controller */
+ usb_hub_for_each_child(hub, i, child) {
+ child_vid = le16_to_cpu(child->descriptor.idVendor);
+ child_pid = le16_to_cpu(child->descriptor.idProduct);
+
+ /*
+ * If one of the devices below is present attached as a sibling of
+ * the touch controller then this is a newer IBM 4820 monitor that
+ * does not need the IBM-requested workaround if fw level is
+ * 0x010d - aka 'M'.
+ * No other HW can have this combination.
+ */
+ if (child_vid==0x04b3) {
+ switch (child_pid) {
+ case 0x4676: /* 4820 21x Video */
+ case 0x4677: /* 4820 51x Video */
+ case 0x4678: /* 4820 2Lx Video */
+ case 0x4679: /* 4820 5Lx Video */
+ return false;
+ }
+ }
+ }
+ return true;
}
static int elo_probe(struct hid_device *hdev, const struct hid_device_id *id)