From cde9dde6e11a5ab54b6462cd46d82878926783bc Mon Sep 17 00:00:00 2001
From: Jeffrey Hugo <jeffrey.l.hugo@gmail.com>
Date: Thu, 17 Oct 2019 14:29:55 -0700
Subject: [PATCH] Bluetooth: hci_qca: Add delay for wcn3990 stability
Git-commit: cde9dde6e11a5ab54b6462cd46d82878926783bc
Patch-mainline: v5.5-rc1
References: jsc#SLE-13430
On the msm8998 mtp, the response to the baudrate change command is never
received. On the Lenovo Miix 630, the response to the baudrate change
command is corrupted - "Frame reassembly failed (-84)".
Adding a 50ms delay before re-enabling flow to receive the baudrate change
command response from the wcn3990 addesses both issues, and allows
bluetooth to become functional.
Signed-off-by: Jeffrey Hugo <jeffrey.l.hugo@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/bluetooth/hci_qca.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index e3164c200eac..265fc60c3850 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -1156,8 +1156,10 @@ static int qca_set_speed(struct hci_uart *hu, enum qca_speed_type speed_type)
host_set_baudrate(hu, speed);
error:
- if (qca_is_wcn399x(soc_type))
+ if (qca_is_wcn399x(soc_type)) {
+ msleep(50);
hci_uart_set_flow_control(hu, false);
+ }
if (soc_type == QCA_WCN3990) {
/* Wait for the controller to send the vendor event
--
2.16.4