diff options
Diffstat (limited to 'drivers/usb/gadget/function/u_audio.h')
| -rw-r--r-- | drivers/usb/gadget/function/u_audio.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/usb/gadget/function/u_audio.h b/drivers/usb/gadget/function/u_audio.h index 5ea6b86f1fda..a218cdf771fe 100644 --- a/drivers/usb/gadget/function/u_audio.h +++ b/drivers/usb/gadget/function/u_audio.h @@ -11,6 +11,14 @@ #include <linux/usb/composite.h> +/* + * Same maximum frequency deviation on the slower side as in + * sound/usb/endpoint.c. Value is expressed in per-mil deviation. + * The maximum deviation on the faster side will be provided as + * parameter, as it impacts the endpoint required bandwidth. + */ +#define FBACK_SLOW_MAX 250 + struct uac_params { /* playback */ int p_chmask; /* channel mask */ @@ -23,6 +31,7 @@ struct uac_params { int c_ssize; /* sample size */ int req_number; /* number of preallocated requests */ + int fb_max; /* upper frequency drift feedback limit per-mil */ }; struct g_audio { @@ -30,7 +39,10 @@ struct g_audio { struct usb_gadget *gadget; struct usb_ep *in_ep; + struct usb_ep *out_ep; + /* feedback IN endpoint corresponding to out_ep */ + struct usb_ep *in_ep_fback; /* Max packet size for all in_ep possible speeds */ unsigned int in_ep_maxpsize; |