ALSA: usb-audio: Avoid unnecessary EP setups in prepare

[deliverable/linux.git] / sound / usb / card.h

diff --git a/sound/usb/card.h b/sound/usb/card.h
index 23b6f23bd36a0532557fe0114de513acf7960a8c..afa4f9e9b27a2673b1fc955d680859cb7f964f02 100644 (file)
--- a/sound/usb/card.h
+++ b/sound/usb/card.h
@@ -107,6 +107,8 @@ struct snd_usb_substream {
        int interface;  /* current interface */
        int endpoint;   /* assigned endpoint */
        struct audioformat *cur_audiofmt;       /* current audioformat pointer (for hw_params callback) */
+       snd_pcm_format_t pcm_format;    /* current audio format (for hw_params callback) */
+       unsigned int channels;          /* current number of channels (for hw_params callback) */
        unsigned int cur_rate;          /* current rate (for hw_params callback) */
        unsigned int period_bytes;      /* current period bytes (for hw_params callback) */
        unsigned int altset_idx;     /* USB data format: index of alternate setting */
@@ -123,6 +125,7 @@ struct snd_usb_substream {
        struct snd_usb_endpoint *data_endpoint;
        struct snd_usb_endpoint *sync_endpoint;
        unsigned long flags;
+       bool need_setup_ep;             /* (re)configure EP at prepare? */
 
        u64 formats;                    /* format bitmasks (all or'ed) */
        unsigned int num_formats;               /* number of supported audio formats (list) */