From: Takashi Iwai <tiwai@suse.de>
Date: Tue, 13 Sep 2005 09:28:53 +0000 (+0200)
Subject: [ALSA] hda-intel - Disable DMA position auto-correction
X-Git-Tag: v2.6.14-rc4~25^2~22
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e8dede5a136bd7ef36d1779ea173cfd504dff0cb;p=linux-2.6

[ALSA] hda-intel - Disable DMA position auto-correction

HDA Intel driver
Disable the auto-correction of DMA position temporarily.
It doesn't work as expected yet...

Signed-off-by: Takashi Iwai <tiwai@suse.de>
---

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 9590ece209..6fe696e53e 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -1137,6 +1137,7 @@ static snd_pcm_uframes_t azx_pcm_pointer(snd_pcm_substream_t *substream)
 		pos = azx_sd_readl(azx_dev, SD_LPIB);
 		if (chip->position_fix == POS_FIX_FIFO)
 			pos += azx_dev->fifo_size;
+#if 0 /* disabled temprarily, auto-correction doesn't work well... */
 		else if (chip->position_fix == POS_FIX_AUTO && azx_dev->period_updating) {
 			/* check the validity of DMA position */
 			unsigned int diff = 0;
@@ -1157,6 +1158,10 @@ static snd_pcm_uframes_t azx_pcm_pointer(snd_pcm_substream_t *substream)
 			}
 			azx_dev->period_updating = 0;
 		}
+#else
+		else if (chip->position_fix == POS_FIX_AUTO)
+			pos += azx_dev->fifo_size;
+#endif
 	}
 	if (pos >= azx_dev->bufsize)
 		pos = 0;