linux-kernel - Re: [PATCH v1] Bluetooth: hci_qca:Fixed issue during suspend

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Date:   Mon, 08 Feb 2021 15:43:35 +0530
From:   bgodavar@...eaurora.org
To:     Venkata Lakshmi Narayana Gubba <gubbaven@...eaurora.org>,
        Kalle Valo <kvalo@...eaurora.org>
Cc:     marcel@...tmann.org, johan.hedberg@...il.com, mka@...omium.org,
        linux-kernel@...r.kernel.org, linux-bluetooth@...r.kernel.org,
        hemantg@...eaurora.org, linux-arm-msm@...r.kernel.org,
        rjliao@...eaurora.org, hbandi@...eaurora.org,
        abhishekpandit@...omium.org
Subject: Re: [PATCH v1] Bluetooth: hci_qca:Fixed issue during suspend

+ Kalle Valo for +1T

On 2021-02-05 21:07, Venkata Lakshmi Narayana Gubba wrote:
> If BT SoC is running with ROM FW then just return in
> qca_suspend function as ROM FW does not support
> in-band sleep.
> 
> Fixes: 2be43abac5a8 ("Bluetooth: hci_qca: Wait for timeout during 
> suspend")
> Signed-off-by: Venkata Lakshmi Narayana Gubba <gubbaven@...eaurora.org>
> ---
>  drivers/bluetooth/hci_qca.c | 12 +++++++++++-
>  1 file changed, 11 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
> index ff2fb68..de36af6 100644
> --- a/drivers/bluetooth/hci_qca.c
> +++ b/drivers/bluetooth/hci_qca.c
> @@ -77,7 +77,8 @@ enum qca_flags {
>  	QCA_MEMDUMP_COLLECTION,
>  	QCA_HW_ERROR_EVENT,
>  	QCA_SSR_TRIGGERED,
> -	QCA_BT_OFF
> +	QCA_BT_OFF,
> +	QCA_ROM_FW
>  };
> 
>  enum qca_capabilities {
> @@ -1664,6 +1665,7 @@ static int qca_setup(struct hci_uart *hu)
>  	if (ret)
>  		return ret;
> 
> +	clear_bit(QCA_ROM_FW, &qca->flags);
>  	/* Patch downloading has to be done without IBS mode */
>  	set_bit(QCA_IBS_DISABLED, &qca->flags);
> 
> @@ -1721,12 +1723,14 @@ static int qca_setup(struct hci_uart *hu)
>  		hu->hdev->cmd_timeout = qca_cmd_timeout;
>  	} else if (ret == -ENOENT) {
>  		/* No patch/nvm-config found, run with original fw/config */
> +		set_bit(QCA_ROM_FW, &qca->flags);
>  		ret = 0;
>  	} else if (ret == -EAGAIN) {
>  		/*
>  		 * Userspace firmware loader will return -EAGAIN in case no
>  		 * patch/nvm-config is found, so run with original fw/config.
>  		 */
> +		set_bit(QCA_ROM_FW, &qca->flags);
>  		ret = 0;
>  	}
> 
> @@ -2103,6 +2107,12 @@ static int __maybe_unused qca_suspend(struct 
> device *dev)
> 
>  	set_bit(QCA_SUSPENDING, &qca->flags);
> 
> +	/* if BT SoC is running with default firmware then it does not
> +	 * support in-band sleep
> +	 */
> +	if (test_bit(QCA_ROM_FW, &qca->flags))
> +		return 0;
> +
>  	/* During SSR after memory dump collection, controller will be
>  	 * powered off and then powered on.If controller is powered off
>  	 * during SSR then we should wait until SSR is completed.