From b9c56137573af7098453e86b363201f3f633f958 Mon Sep 17 00:00:00 2001 From: Jeffrey Hugo Date: Thu, 17 Oct 2019 14:29:55 -0700 Subject: [PATCH] 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(-) diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c index e3164c200eac5..265fc60c38508 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 -- 2.39.5