On 17/05/17 11:15, Sekhar Nori wrote:
> Calculate wMaxPacketSize before endpoint matching the
> descriptor is found.
> 
> This allows audio gadget to be used with controllers
> which have a shortage or unavailability of endpoints
> that can handle max packet size of 1023 (FS) or 1024
> (HS).
> 
> With this audio gadget can be used on TI's OMAP-L138 SoC
> which has a MUSB HS controller with endpoints having max
> packet size much less than 1023 or 1024. See mode_2_cfg in
> drivers/usb/musb/musb_core.c
> 
> Signed-off-by: Sekhar Nori <nsek...@ti.com>

Acked-by: Roger Quadros <rog...@ti.com>

> ---
>  drivers/usb/gadget/function/f_uac2.c | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/usb/gadget/function/f_uac2.c 
> b/drivers/usb/gadget/function/f_uac2.c
> index f6a0d3a1311b..5a7ba058d947 100644
> --- a/drivers/usb/gadget/function/f_uac2.c
> +++ b/drivers/usb/gadget/function/f_uac2.c
> @@ -1065,6 +1065,12 @@ afunc_bind(struct usb_configuration *cfg, struct 
> usb_function *fn)
>       agdev->as_in_intf = ret;
>       agdev->as_in_alt = 0;
>  
> +     /* Calculate wMaxPacketSize according to audio bandwidth */
> +     set_ep_max_packet_size(uac2_opts, &fs_epin_desc, 1000, true);
> +     set_ep_max_packet_size(uac2_opts, &fs_epout_desc, 1000, false);
> +     set_ep_max_packet_size(uac2_opts, &hs_epin_desc, 8000, true);
> +     set_ep_max_packet_size(uac2_opts, &hs_epout_desc, 8000, false);
> +
>       agdev->out_ep = usb_ep_autoconfig(gadget, &fs_epout_desc);
>       if (!agdev->out_ep) {
>               dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
> @@ -1080,12 +1086,6 @@ afunc_bind(struct usb_configuration *cfg, struct 
> usb_function *fn)
>       uac2->p_prm.uac2 = uac2;
>       uac2->c_prm.uac2 = uac2;
>  
> -     /* Calculate wMaxPacketSize according to audio bandwidth */
> -     set_ep_max_packet_size(uac2_opts, &fs_epin_desc, 1000, true);
> -     set_ep_max_packet_size(uac2_opts, &fs_epout_desc, 1000, false);
> -     set_ep_max_packet_size(uac2_opts, &hs_epin_desc, 8000, true);
> -     set_ep_max_packet_size(uac2_opts, &hs_epout_desc, 8000, false);
> -
>       hs_epout_desc.bEndpointAddress = fs_epout_desc.bEndpointAddress;
>       hs_epin_desc.bEndpointAddress = fs_epin_desc.bEndpointAddress;
>  
> 

-- 
cheers,
-roger

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