diff options
| author | Takashi Iwai <tiwai@suse.de> | 2012-10-16 16:52:26 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-10-21 09:32:43 -0700 |
| commit | 5831e4dc072b50a8dc77e69d9247588f8559116c (patch) | |
| tree | 4e0e0c92ca2502a278a24d79508956553ebf636c /sound | |
| parent | b393c7d4d577fa9f55fa7ba84d51bd30352b80da (diff) | |
ALSA: hda - Stop LPIB delay counting on broken hardware
commit 1f04661fde9deda4a2cd5845258715a22d8af197 upstream.
If LPIB reports a pretty bad value, we can't trust such hardware for
calculating the PCM delay. Automatically turn off the delay counting
when such a problem is encountered.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=48911
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/pci/hda/hda_intel.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index 3cbfbcb07ff0..a5dc7464e3b4 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -2136,9 +2136,12 @@ static unsigned int azx_get_position(struct azx *chip, if (delay < 0) delay += azx_dev->bufsize; if (delay >= azx_dev->period_bytes) { - snd_printdd("delay %d > period_bytes %d\n", - delay, azx_dev->period_bytes); - delay = 0; /* something is wrong */ + snd_printk(KERN_WARNING SFX + "Unstable LPIB (%d >= %d); " + "disabling LPIB delay counting\n", + delay, azx_dev->period_bytes); + delay = 0; + chip->driver_caps &= ~AZX_DCAPS_COUNT_LPIB_DELAY; } azx_dev->substream->runtime->delay = bytes_to_frames(azx_dev->substream->runtime, delay); |