Re: [PATCH v2 1/1] Bluetooth: hci_ll: Enable BROKEN_ENHANCED_SETUP_SYNC_CONN for WL183x

[Stefano Radaelli <stefano.radaelli21@gmail.com>]

Hi,

On Tue, Feb 24, 2026 at 12:12:35PM +0100, Stefano Radaelli wrote:
> From: Stefano Radaelli <stefano.r@variscite.com>
> 
> TI WL183x controllers advertise support for the HCI Enhanced Setup
> Synchronous Connection command, but SCO setup fails when the enhanced
> path is used. The only working configuration is to fall back to the
> legacy HCI Setup Synchronous Connection (0x0028).
> 
> This matches the scenario described in commit 05abad857277
> ("Bluetooth: HCI: Add HCI_QUIRK_BROKEN_ENHANCED_SETUP_SYNC_CONN quirk").
> 
> Enable HCI_QUIRK_BROKEN_ENHANCED_SETUP_SYNC_CONN automatically for
> devices compatible with:
>   - ti,wl1831-st
>   - ti,wl1835-st
>   - ti,wl1837-st
> 
> Signed-off-by: Stefano Radaelli <stefano.r@variscite.com>
> ---
> v1->v2:
>  - 
> 
>  drivers/bluetooth/hci_ll.c | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/drivers/bluetooth/hci_ll.c b/drivers/bluetooth/hci_ll.c
> index 91acf24f1ef5..6f060eec3b81 100644
> --- a/drivers/bluetooth/hci_ll.c
> +++ b/drivers/bluetooth/hci_ll.c
> @@ -68,6 +68,7 @@ struct ll_device {
>  	struct gpio_desc *enable_gpio;
>  	struct clk *ext_clk;
>  	bdaddr_t bdaddr;
> +	bool broken_enhanced_setup;
>  };
>  
>  struct ll_struct {
> @@ -656,6 +657,10 @@ static int ll_setup(struct hci_uart *hu)
>  			hci_set_quirk(hu->hdev, HCI_QUIRK_INVALID_BDADDR);
>  	}
>  
> +	if (lldev->broken_enhanced_setup)
> +		hci_set_quirk(hu->hdev,
> +			      HCI_QUIRK_BROKEN_ENHANCED_SETUP_SYNC_CONN);
> +
>  	/* Operational speed if any */
>  	if (hu->oper_speed)
>  		speed = hu->oper_speed;
> @@ -710,6 +715,11 @@ static int hci_ti_probe(struct serdev_device *serdev)
>  	of_property_read_u32(serdev->dev.of_node, "max-speed", &max_speed);
>  	hci_uart_set_speeds(hu, 115200, max_speed);
>  
> +	if (of_device_is_compatible(serdev->dev.of_node, "ti,wl1831-st") ||
> +	    of_device_is_compatible(serdev->dev.of_node, "ti,wl1835-st") ||
> +	    of_device_is_compatible(serdev->dev.of_node, "ti,wl1837-st"))
> +		lldev->broken_enhanced_setup = true;
> +
>  	/* optional BD address from nvram */
>  	bdaddr_cell = nvmem_cell_get(&serdev->dev, "bd-address");
>  	if (IS_ERR(bdaddr_cell)) {
> -- 
> 2.47.3
> 

I noticed that this patch has not received feedback and is now marked as
archived in patchwork.

I also saw that the CI reported some test failures (e.g. mgmt-tester and
others), and I was wondering if this might be the reason why it has not
been considered.

Could you please let me know if I should address those issues or if any
changes are needed for this patch?

Thanks,
Stefano