On 07/28/2015 11:30 AM, Daniel Mack wrote:
> On 07/28/2015 03:38 AM, Peter Chen wrote:
>> +static void set_ep_max_packet_size (struct f_uac2_opts *uac2_opts,
>> + struct usb_endpoint_descriptor *ep_desc, unsigned int factor)
>> +{
>> + int chmask;
>> + int srate;
>> + int ssize;
>> + u16 max_packet_size;
>> +
>> + if (ep_desc == &fs_epin_desc || ep_desc == &hs_epin_desc) {
>> + chmask = uac2_opts->p_chmask;
>> + srate = uac2_opts->p_srate;
>> + ssize = uac2_opts->p_ssize;
>> + } else {
>> + WARN_ON (ep_desc != &fs_epout_desc && ep_desc !=
>> &hs_epout_desc);
>> + chmask = uac2_opts->c_chmask;
>> + srate = uac2_opts->c_srate;
>> + ssize = uac2_opts->c_ssize;
>> + }
>> +
>> + max_packet_size = num_channels(chmask) * ssize *
>> + DIV_ROUND_UP(srate, factor / (1 << (ep_desc->bInterval - 1)));
>> + ep_desc->wMaxPacketSize = min(cpu_to_le16(max_packet_size),
>> + ep_desc->wMaxPacketSize);
>> +}
>
> Thinking about it again, it would probably be nicer to make this
> function return wMaxPacketSize directly:
Ah, no, that doesn't make sense, sorry. We need bInterval and the
current value of wMaxPacketSize as well. Just stick with your current
approach then :)
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