From cde9dde6e11a5ab54b6462cd46d82878926783bc Mon Sep 17 00:00:00 2001 From: Jeffrey Hugo Date: Thu, 17 Oct 2019 14:29:55 -0700 Subject: Bluetooth: hci_qca: Add delay for wcn3990 stability 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 Signed-off-by: Marcel Holtmann --- drivers/bluetooth/hci_qca.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'drivers/bluetooth') 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 -- cgit v1.2.3-59-g8ed1b