linux-kernel - Re: [PATCH] Bluetooth: hci_qca: Add delay for wcn3990 stability

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Date:   Fri, 18 Oct 2019 09:57:02 +0200
From:   Marcel Holtmann <marcel@...tmann.org>
To:     Jeffrey Hugo <jeffrey.l.hugo@...il.com>
Cc:     Johan Hedberg <johan.hedberg@...il.com>, c-hbandi@...eaurora.org,
        bgodavar@...eaurora.org, linux-bluetooth@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Bluetooth: hci_qca: Add delay for wcn3990 stability

Hi Jeffrey,

> 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@...il.com>
> ---
> drivers/bluetooth/hci_qca.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)

patch has been applied to bluetooth-next tree.

Regards

Marcel