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ALSA: usb: USB3 SuperSpeed sound support

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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>
This commit is contained in:
Paul Zimmerman
2010-08-13 12:42:07 -07:00
committed by Takashi Iwai
parent 31cbd97726
commit 4f4e8f6989
6 changed files with 46 additions and 19 deletions
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4
sound/usb/pcm.c
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@ -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)