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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 <jeffrey.l.hugo@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Jeffrey Hugo 2019-10-17 14:29:55 -07:00 committed by Marcel Holtmann
parent b9a2562f49
commit cde9dde6e1
1 changed files with 3 additions and 1 deletions
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4
drivers/bluetooth/hci_qca.c
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@ -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