[PATCH v3] Bluetooth: btusb: fix bt fiwmare downloading failure issue for qca btsoc.

* [PATCH v3] Bluetooth: btusb: fix bt fiwmare downloading failure issue for qca btsoc.
@ 2021-06-01  9:57 Zijun Hu
  2021-06-01 10:55 ` [v3] " bluez.test.bot
  2021-06-02 20:11 ` [PATCH v3] " Marcel Holtmann
  0 siblings, 2 replies; 3+ messages in thread
From: Zijun Hu @ 2021-06-01  9:57 UTC (permalink / raw)
  To: marcel, johan.hedberg, luiz.dentz
  Cc: linux-kernel, linux-bluetooth, linux-arm-msm, bgodavar, c-hbandi,
	hemantg, mka, rjliao, zijuhu, tjiang

From: Tim Jiang <tjiang@codeaurora.org>

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>
---
 drivers/bluetooth/btusb.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 5245714..bd5242f 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -4065,6 +4065,11 @@ 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);
 
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project


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