ALSA: usb: USB3 SuperSpeed sound support

This is V2 of the patch, after feedback from Clemens and Daniel.

This patch adds SuperSpeed support to the USB drivers under sound/. It adds
tests for USB_SPEED_SUPER to the appropriate places that check for the USB
speed.

This patch has been tested with our SS USB3 device emulating a set of Yamaha
speakers and a Logitech microphone, but with the descriptors modified to add
USB3 support. It has also been tested with the real speakers and microphone,
to make sure that USB2 devices still work.

Signed-off-by: Paul Zimmerman <paulz@synopsys.com>
Cc: Clemens Ladisch <clemens@ladisch.de>
Cc: Daniel Mack <daniel@caiaq.de>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 2 insertions, 2 deletions

diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index 456829882f40..ebd09acd186e 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -467,7 +467,7 @@ static int hw_check_valid_format(struct snd_usb_substream *subs,
                 return 0;
         }
         /* check whether the period time is >= the data packet interval */
-        if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH) {
+        if (snd_usb_get_speed(subs->dev) != USB_SPEED_FULL) {
                 ptime = 125 * (1 << fp->datainterval);
                 if (ptime > pt->max || (ptime == pt->max && pt->openmax)) {
                         hwc_debug("   > check: ptime %u > max %u\n", ptime, pt->max);
@@ -735,7 +735,7 @@ static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substre
         }
 
         param_period_time_if_needed = SNDRV_PCM_HW_PARAM_PERIOD_TIME;
-        if (snd_usb_get_speed(subs->dev) != USB_SPEED_HIGH)
+        if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
                 /* full speed devices have fixed data packet interval */
                 ptmin = 1000;
         if (ptmin == 1000)