From 4f00bfb372674d586c4a261bfc595cbce101fbb6 Mon Sep 17 00:00:00 2001
From: Tim Jiang <tjiang@codeaurora.org>
Date: Tue, 1 Jun 2021 17:57:10 +0800
Subject: [PATCH] Bluetooth: btusb: fix bt fiwmare downloading failure issue for qca btsoc.
Git-commit: 4f00bfb372674d586c4a261bfc595cbce101fbb6
Patch-mainline: v5.14-rc1
References: git-fixes
This is btsoc timing issue, after host start to downloading bt firmware,
ep2 need time to switch from function acl to function dfu, so host add
20ms delay as workaround.
Signed-off-by: Tim Jiang <tjiang@codeaurora.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/bluetooth/btusb.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index ad07dbedc284..a9855a2dd561 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -4080,6 +4080,11 @@ static int btusb_setup_qca_download_fw(struct hci_dev *hdev,
sent += size;
count -= size;
+ /* ep2 need time to switch from function acl to function dfu,
+ * so we add 20ms delay here.
+ */
+ msleep(20);
+
while (count) {
size = min_t(size_t, count, QCA_DFU_PACKET_LEN);
--
2.26.2