linux-kernel - Re: [PATCH v2] Bluetooth: hci_qca: Enable WBS support for wcn3991

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Message-ID: <20200514210724.GQ4525@google.com>
Date:   Thu, 14 May 2020 14:07:24 -0700
From:   Matthias Kaehlcke <mka@...omium.org>
To:     Abhishek Pandit-Subedi <abhishekpandit@...omium.org>
Cc:     linux-bluetooth@...r.kernel.org, bgodavar@...eaurora.org,
        alainm@...omium.org, marcel@...tmann.org,
        chromeos-bluetooth-upstreaming@...omium.org,
        Johan Hedberg <johan.hedberg@...il.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] Bluetooth: hci_qca: Enable WBS support for wcn3991

Hi Abhishek,

On Thu, May 14, 2020 at 01:14:04PM -0700, Abhishek Pandit-Subedi wrote:
> WCN3991 supports transparent WBS (host encoded mSBC). Add a flag to the
> device match data to show WBS is supported.
> 
> This requires the matching firmware for WCN3991 in linux-firmware:
>         1a8b0dc00f77 (qca: Enable transparent WBS for WCN3991)
> 
> Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@...omium.org>
> ---
> 
> Changes in v2:
> - Rename struct to qca_capabilities and fix enum naming
> 
>  drivers/bluetooth/hci_qca.c | 23 +++++++++++++++++------
>  1 file changed, 17 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
> index b3fd07a6f8127..96799644f0933 100644
> --- a/drivers/bluetooth/hci_qca.c
> +++ b/drivers/bluetooth/hci_qca.c
> @@ -75,6 +75,9 @@ enum qca_flags {
>  	QCA_HW_ERROR_EVENT
>  };
>  
> +enum qca_capabilities {
> +	QCA_CAP_WIDEBAND_SPEECH_SUPPORTED = BIT(0),

nit: the '_SUPPORTED' suffix seems somewhat redundant, given that this
is a capability (as 'CAP' indicates). Up to you if you want to keep it.

> +};
>  
>  /* HCI_IBS transmit side sleep protocol states */
>  enum tx_ibs_states {
> @@ -187,10 +190,11 @@ struct qca_vreg {
>  	unsigned int load_uA;
>  };
>  
> -struct qca_vreg_data {
> +struct qca_device_data {
>  	enum qca_btsoc_type soc_type;
>  	struct qca_vreg *vregs;
>  	size_t num_vregs;
> +	uint32_t capabilities;
>  };
>  
>  /*
> @@ -1691,7 +1695,7 @@ static const struct hci_uart_proto qca_proto = {
>  	.dequeue	= qca_dequeue,
>  };
>  
> -static const struct qca_vreg_data qca_soc_data_wcn3990 = {
> +static const struct qca_device_data qca_soc_data_wcn3990 = {
>  	.soc_type = QCA_WCN3990,
>  	.vregs = (struct qca_vreg []) {
>  		{ "vddio", 15000  },
> @@ -1702,7 +1706,7 @@ static const struct qca_vreg_data qca_soc_data_wcn3990 = {
>  	.num_vregs = 4,
>  };
>  
> -static const struct qca_vreg_data qca_soc_data_wcn3991 = {
> +static const struct qca_device_data qca_soc_data_wcn3991 = {
>  	.soc_type = QCA_WCN3991,
>  	.vregs = (struct qca_vreg []) {
>  		{ "vddio", 15000  },
> @@ -1711,9 +1715,10 @@ static const struct qca_vreg_data qca_soc_data_wcn3991 = {
>  		{ "vddch0", 450000 },
>  	},
>  	.num_vregs = 4,
> +	.capabilities = QCA_CAP_WIDEBAND_SPEECH_SUPPORTED,
>  };
>  
> -static const struct qca_vreg_data qca_soc_data_wcn3998 = {
> +static const struct qca_device_data qca_soc_data_wcn3998 = {
>  	.soc_type = QCA_WCN3998,
>  	.vregs = (struct qca_vreg []) {
>  		{ "vddio", 10000  },
> @@ -1724,7 +1729,7 @@ static const struct qca_vreg_data qca_soc_data_wcn3998 = {
>  	.num_vregs = 4,
>  };
>  
> -static const struct qca_vreg_data qca_soc_data_qca6390 = {
> +static const struct qca_device_data qca_soc_data_qca6390 = {
>  	.soc_type = QCA_QCA6390,
>  	.num_vregs = 0,
>  };
> @@ -1860,7 +1865,7 @@ static int qca_serdev_probe(struct serdev_device *serdev)
>  {
>  	struct qca_serdev *qcadev;
>  	struct hci_dev *hdev;
> -	const struct qca_vreg_data *data;
> +	const struct qca_device_data *data;
>  	int err;
>  	bool power_ctrl_enabled = true;
>  
> @@ -1948,6 +1953,12 @@ static int qca_serdev_probe(struct serdev_device *serdev)
>  		hdev->shutdown = qca_power_off;
>  	}
>  
> +	/* Wideband speech support must be set per driver since it can't be
> +	 * queried via hci.
> +	 */
> +	if (data && (data->capabilities & QCA_CAP_WIDEBAND_SPEECH_SUPPORTED))
> +		set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks);
> +
>  	return 0;
>  }

Reviewed-by: Matthias Kaehlcke <mka@...omium.org>