fix spreadtrum (sprd) broken bluetooth park link status

armbian · Sep 4, 2023 · 350d41b · 350d41b
1 parent 9886485
commit 350d41b
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Showing 3 changed files with 13 additions and 1 deletion.
diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c
@@ -660,6 +660,12 @@ static int hci_uart_register_dev(struct hci_uart *hu)
 	hdev->setup = hci_uart_setup;
 	SET_HCIDEV_DEV(hdev, hu->tty->dev);
 
+	// Set the broken Park link status quirk, specific for spreadtrum (sprd)
+	// bluetooth devices
+	if (hdev->manufacturer == 0xffff && hu->tty->driver &&
+		strncmp(hu->tty->driver->name, "ttyBT", 5) == 0)
+		set_bit(HCI_QUIRK_BROKEN_PARK_LINK_STATUS, &hdev->quirks);
+
 	if (test_bit(HCI_UART_RAW_DEVICE, &hu->hdev_flags))
 		set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
 

diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
@@ -246,6 +246,12 @@ enum {
 	 * HCI after resume.
 	 */
 	HCI_QUIRK_NO_SUSPEND_NOTIFIER,
+
+	/*
+	* Device declares that support Park link status, but it really
+	* does not support it and fails to initialize
+	*/
+	HCI_QUIRK_BROKEN_PARK_LINK_STATUS,
 };
 
 /* HCI device flags */

diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
@@ -510,7 +510,7 @@ static void hci_setup_link_policy(struct hci_request *req)
 		link_policy |= HCI_LP_HOLD;
 	if (lmp_sniff_capable(hdev))
 		link_policy |= HCI_LP_SNIFF;
-	if (lmp_park_capable(hdev))
+	if (lmp_park_capable(hdev) && !test_bit(HCI_QUIRK_BROKEN_PARK_LINK_STATUS, &hdev->quirks))
 		link_policy |= HCI_LP_PARK;
 
 	cp.policy = cpu_to_le16(link_policy);