At Tue, 31 Mar 2015 07:36:28 +0000, Eric Wong wrote:

Eric Wong normalperson@yhbt.net wrote:

...

I also had another generic patch prepared before I noticed Joe's quirk addition for the MS Lifecam HD-5000.

This is the generic patch I prepared before I noticed Joe's quirk addition (applies cleanly to 3.19 and 4.0-rc6):

------------------------------8<--------------------------- Subject: [PATCH] ALSA: usb-audio: reduce "cannot get freq at ep" spew

If a device fails to support reading the sample rate, it will likely fail again and there is no point in logging the message every time the sample rate is set.

This reduces dmesg noise when using the Benchmark DAC1 PRE as a USB sound card.

Hm, this shuts up all the rest for the device, so it also hides if the message comes from multiple EPs.

Takashi

Signed-off-by: Eric Wong normalperson@yhbt.net

sound/usb/clock.c | 7 +++++-- sound/usb/usbaudio.h | 3 ++- 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/sound/usb/clock.c b/sound/usb/clock.c index 03fed66..512fe12 100644 --- a/sound/usb/clock.c +++ b/sound/usb/clock.c @@ -307,8 +307,11 @@ static int set_sample_rate_v1(struct snd_usb_audio *chip, int iface, USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_IN, UAC_EP_CS_ATTR_SAMPLE_RATE << 8, ep, data, sizeof(data))) < 0) {

• dev_err(&dev->dev, "%d:%d: cannot get freq at ep %#x\n",
  

• 	iface, fmt->altsetting, ep);
  

• if (!chip->no_get_freq) {
  

• 	dev_err(&dev->dev, "%d:%d: cannot get freq at ep %#x\n",
  

• 		iface, fmt->altsetting, ep);
  

• 	chip->no_get_freq = 1;
  

• }
  

  return 0; /* some devices don't support reading */ }

diff --git a/sound/usb/usbaudio.h b/sound/usb/usbaudio.h index 91d0380..be65671 100644 --- a/sound/usb/usbaudio.h +++ b/sound/usb/usbaudio.h @@ -43,7 +43,8 @@ struct snd_usb_audio { unsigned int in_pm:1; unsigned int autosuspended:1; unsigned int txfr_quirk:1; /* Subframe boundaries on transfers */

• unsigned int no_get_freq:1;
• int num_interfaces; int num_suspended_intf;

-- EW