From 798cb7e897210dbf827f69a302c0967e0380ebac Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Fri, 30 Sep 2011 08:52:26 +0200 Subject: ALSA: hda - Fix a regression of the position-buffer check The commit a810364a0424c297242c6c66071a42f7675a5568 ALSA: hda - Handle -1 as invalid position, too caused a regression on some machines that require the position-buffer instead of LPIB, e.g. resulting in noises with mic recording with PulseAudio. This patch fixes the detection by delaying the test at the timing as same as 3.0, i.e. doing the position check only when requested in azx_position_ok(). Reported-and-tested-by: Rocko Requin Signed-off-by: Takashi Iwai --- sound/pci/hda/hda_intel.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index be6982289c0..e9a2a8795d1 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -1924,7 +1924,8 @@ static unsigned int azx_via_get_position(struct azx *chip, } static unsigned int azx_get_position(struct azx *chip, - struct azx_dev *azx_dev) + struct azx_dev *azx_dev, + bool with_check) { unsigned int pos; int stream = azx_dev->substream->stream; @@ -1940,7 +1941,7 @@ static unsigned int azx_get_position(struct azx *chip, default: /* use the position buffer */ pos = le32_to_cpu(*azx_dev->posbuf); - if (chip->position_fix[stream] == POS_FIX_AUTO) { + if (with_check && chip->position_fix[stream] == POS_FIX_AUTO) { if (!pos || pos == (u32)-1) { printk(KERN_WARNING "hda-intel: Invalid position buffer, " @@ -1964,7 +1965,7 @@ static snd_pcm_uframes_t azx_pcm_pointer(struct snd_pcm_substream *substream) struct azx *chip = apcm->chip; struct azx_dev *azx_dev = get_azx_dev(substream); return bytes_to_frames(substream->runtime, - azx_get_position(chip, azx_dev)); + azx_get_position(chip, azx_dev, false)); } /* @@ -1987,7 +1988,7 @@ static int azx_position_ok(struct azx *chip, struct azx_dev *azx_dev) return -1; /* bogus (too early) interrupt */ stream = azx_dev->substream->stream; - pos = azx_get_position(chip, azx_dev); + pos = azx_get_position(chip, azx_dev, true); if (WARN_ONCE(!azx_dev->period_bytes, "hda-intel: zero azx_dev->period_bytes")) -- cgit v1.2.3-18-g5258