linux-kernel - Re: [PATCH v1] Bluetooth: hci_qca: Optimizations in init sequence for WCN6750.

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Message-Id: <FA830939-AD92-47D0-A125-3543B89D7E2D@holtmann.org>
Date:   Thu, 25 Nov 2021 19:44:41 +0100
From:   Marcel Holtmann <marcel@...tmann.org>
To:     pharish <pharish@...eaurora.org>
Cc:     Johan Hedberg <johan.hedberg@...il.com>,
        Matthias Kaehlcke <mka@...omium.org>,
        linux-kernel@...r.kernel.org, linux-bluetooth@...r.kernel.org,
        hemantg@...eaurora.org, linux-arm-msm@...r.kernel.org,
        bgodavar@...eaurora.org, rjliao@...eaurora.org,
        hbandi@...eaurora.org, abhishekpandit@...omium.org,
        mcchou@...omium.org, saluvala@...eaurora.org
Subject: Re: [PATCH v1] Bluetooth: hci_qca: Optimizations in init sequence for
 WCN6750.

Hi,

> This change adds optimazation in init sequence for WCN6750.

you need to explain what you are doing.
> 
> Signed-off-by: pharish <pharish@...eaurora.org>
> ---
> drivers/bluetooth/hci_qca.c | 18 +++++++++++-------
> 1 file changed, 11 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
> index 6f44b26..4dedaaa 100644
> --- a/drivers/bluetooth/hci_qca.c
> +++ b/drivers/bluetooth/hci_qca.c
> @@ -1603,15 +1603,19 @@ static int qca_regulator_init(struct hci_uart *hu)
> 	 */
> 	qcadev = serdev_device_get_drvdata(hu->serdev);
> 	if (!qcadev->bt_power->vregs_on) {
> -		serdev_device_close(hu->serdev);
> +		if (qca_is_wcn399x(soc_type))
> +			serdev_device_close(hu->serdev);
> +
> 		ret = qca_regulator_enable(qcadev);
> 		if (ret)
> 			return ret;
> 
> -		ret = serdev_device_open(hu->serdev);
> -		if (ret) {
> -			bt_dev_err(hu->hdev, "failed to open port");
> -			return ret;
> +		if (qca_is_wcn399x(soc_type)) {
> +			ret = serdev_device_open(hu->serdev);
> +			if (ret) {
> +				bt_dev_err(hu->hdev, "failed to open port");
> +				return ret;
> +			}

I am really not doing this. You need to stop doing this SoC X or SoC Y crap. I said this before and I am saying this again, start from scratch and write a clean serdev only driver. Adding things to hci_qca is just a hack.

> 		}
> 	}
> 
> @@ -1635,9 +1639,8 @@ static int qca_regulator_init(struct hci_uart *hu)
> 		}
> 	}
> 
> -	qca_set_speed(hu, QCA_INIT_SPEED);
> -
> 	if (qca_is_wcn399x(soc_type)) {
> +		qca_set_speed(hu, QCA_INIT_SPEED);
> 		ret = qca_send_power_pulse(hu, true);
> 		if (ret)
> 			return ret;
> @@ -1648,6 +1651,7 @@ static int qca_regulator_init(struct hci_uart *hu)
> 	 * Without this, we will have RTS and CTS synchronization
> 	 * issues.
> 	 */
> +

Unrelated change.

> 	serdev_device_close(hu->serdev);
> 	ret = serdev_device_open(hu->serdev);
> 	if (ret) {

Regards

Marcel