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Commit 6b9fa70a authored by Takashi Iwai's avatar Takashi Iwai Committed by Jaroslav Kysela
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[ALSA] usb-audio - Fix the minimum period size per transfer mode 



The minimal period size is 125us for high-speed mode while
1ms for full-speed mode.

Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
Signed-off-by: default avatarJaroslav Kysela <perex@suse.cz>
parent 27fe0f4b

sound/usb/usbaudio.c

+3 −1
Original line number Diff line number Diff line
@@ -1879,7 +1879,9 @@ static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substre 


	/* set the period time minimum 1ms */

	snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,

				     1000 * MIN_PACKS_URB,

				     snd_usb_get_speed(subs->dev) == USB_SPEED_FULL ?

				     

				     1000 * MIN_PACKS_URB : 125 * MIN_PACKS_URB,

				     /*(nrpacks * MAX_URBS) * 1000*/ UINT_MAX);



	if (check_hw_params_convention(subs)) {