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ALSA: usb-audio: set the interface format after resume on Dell WD19 

Recently we found the headset-mic on the Dell Dock WD19 doesn't work
anymore after s3 (s2i or deep), this problem could be workarounded by
closing (pcm_close) the app and then reopening (pcm_open) the app, so
this bug is not easy to be detected by users.

When problem happens, retire_capture_urb() could still be called
periodically, but the size of captured data is always 0, it could be
a firmware bug on the dock. Anyway I found after resuming, the
snd_usb_pcm_prepare() will be called, and if we forcibly run
set_format() to set the interface and its endpoint, the capture
size will be normal again. This problem and workaound also apply to
playback.

To fix it in the kernel, add a quirk to let set_format() run
forcibly once after resume.

Signed-off-by: Hui Wang <hui.wang@canonical.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20191218132650.6303-1-hui.wang@canonical.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Hui Wang 2019-12-18 21:26:50 +08:00 committed by Takashi Iwai
parent 7c497d7992
commit 92adc96f8e
5 changed files with 35 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
sound/usb/card.h
View File

@ -145,6 +145,7 @@ struct snd_usb_substream {
struct snd_usb_endpoint *sync_endpoint;
unsigned long flags;
bool need_setup_ep; /* (re)configure EP at prepare? */
bool need_setup_fmt; /* (re)configure fmt after resume? */
unsigned int speed; /* USB_SPEED_XXX */
u64 formats; /* format bitmasks (all or'ed) */

21
sound/usb/pcm.c
View File

@ -510,11 +510,11 @@ static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
if (WARN_ON(altsd->bAlternateSetting != fmt->altsetting))
return -EINVAL;
if (fmt == subs->cur_audiofmt)
if (fmt == subs->cur_audiofmt && !subs->need_setup_fmt)
return 0;
/* close the old interface */
if (subs->interface >= 0 && subs->interface != fmt->iface) {
if (subs->interface >= 0 && (subs->interface != fmt->iface || subs->need_setup_fmt)) {
if (!subs->stream->chip->keep_iface) {
err = usb_set_interface(subs->dev, subs->interface, 0);
if (err < 0) {
@ -528,6 +528,9 @@ static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
subs->altset_idx = 0;
}
if (subs->need_setup_fmt)
subs->need_setup_fmt = false;
/* set interface */
if (iface->cur_altsetting != alts) {
err = snd_usb_select_mode_quirk(subs, fmt);
@ -1728,6 +1731,13 @@ static int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substrea
subs->data_endpoint->retire_data_urb = retire_playback_urb;
subs->running = 0;
return 0;
case SNDRV_PCM_TRIGGER_SUSPEND:
if (subs->stream->chip->setup_fmt_after_resume_quirk) {
stop_endpoints(subs, true);
subs->need_setup_fmt = true;
return 0;
}
break;
}
return -EINVAL;
@ -1760,6 +1770,13 @@ static int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream
subs->data_endpoint->retire_data_urb = retire_capture_urb;
subs->running = 1;
return 0;
case SNDRV_PCM_TRIGGER_SUSPEND:
if (subs->stream->chip->setup_fmt_after_resume_quirk) {
stop_endpoints(subs, true);
subs->need_setup_fmt = true;
return 0;
}
break;
}
return -EINVAL;

3
sound/usb/quirks-table.h
View File

@ -3466,7 +3466,8 @@ AU0828_DEVICE(0x2040, 0x7270, "Hauppauge", "HVR-950Q"),
.vendor_name = "Dell",
.product_name = "WD19 Dock",
.profile_name = "Dell-WD15-Dock",
.ifnum = QUIRK_NO_INTERFACE
.ifnum = QUIRK_ANY_INTERFACE,
.type = QUIRK_SETUP_FMT_AFTER_RESUME
}
},
/* MOTU Microbook II */

11
sound/usb/quirks.c
View File

@ -508,6 +508,16 @@ static int create_standard_mixer_quirk(struct snd_usb_audio *chip,
return snd_usb_create_mixer(chip, quirk->ifnum, 0);
}
static int setup_fmt_after_resume_quirk(struct snd_usb_audio *chip,
struct usb_interface *iface,
struct usb_driver *driver,
const struct snd_usb_audio_quirk *quirk)
{
chip->setup_fmt_after_resume_quirk = 1;
return 1; /* Continue with creating streams and mixer */
}
/*
* audio-interface quirks
*
@ -546,6 +556,7 @@ int snd_usb_create_quirk(struct snd_usb_audio *chip,
[QUIRK_AUDIO_EDIROL_UAXX] = create_uaxx_quirk,
[QUIRK_AUDIO_ALIGN_TRANSFER] = create_align_transfer_quirk,
[QUIRK_AUDIO_STANDARD_MIXER] = create_standard_mixer_quirk,
[QUIRK_SETUP_FMT_AFTER_RESUME] = setup_fmt_after_resume_quirk,
};
if (quirk->type < QUIRK_TYPE_COUNT) {

3
sound/usb/usbaudio.h
View File

@ -33,7 +33,7 @@ struct snd_usb_audio {
wait_queue_head_t shutdown_wait;
unsigned int txfr_quirk:1; /* Subframe boundaries on transfers */
unsigned int tx_length_quirk:1; /* Put length specifier in transfers */
unsigned int setup_fmt_after_resume_quirk:1; /* setup the format to interface after resume */
int num_interfaces;
int num_suspended_intf;
int sample_rate_read_error;
@ -98,6 +98,7 @@ enum quirk_type {
QUIRK_AUDIO_EDIROL_UAXX,
QUIRK_AUDIO_ALIGN_TRANSFER,
QUIRK_AUDIO_STANDARD_MIXER,
QUIRK_SETUP_FMT_AFTER_RESUME,
QUIRK_TYPE_COUNT
};