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

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Date:   Thu, 14 May 2020 09:30:48 -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] Bluetooth: hci_qca: Enable WBS support for wcn3991

Hi Abhishek,

On Wed, May 13, 2020 at 08:41:25PM -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.

In general this looks good to me, a few nits inside.

> 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>
> ---
> 
>  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..305976c4dcf42 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_driver_flags {
> +	QCA_DRV_WIDEBAND_SPEECH_SUPPORTED = 0x1,

s/0x1/BIT(0)/

> +};

The 'driver'/'DRV' midfix is a bit misleading. WBS support is a device
capability, it's not something the driver supports or doesn't. Maybe
name it 'qca_capabilities' or similar.

>  /* 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 flags;

capabilities?