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ALSA: hda - Align BDL position adjustment parameter

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It seems NVidia and other hardwares require the alignment for period
update timing.  For satisfying this condition, align the position
adjustment for delayed wake-up to the initial bdl_pos_adj value.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2008-07-15 16:28:43 +02:00
parent 2b30a55d4d
commit e785d3d8fb
1 changed files with 5 additions and 1 deletions
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6
sound/pci/hda/hda_intel.c
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@ -1047,9 +1047,13 @@ static int azx_setup_periods(struct azx *chip,
pos_adj = bdl_pos_adj[chip->dev_index];
if (pos_adj > 0) {
struct snd_pcm_runtime *runtime = substream->runtime;
int pos_align = pos_adj;
pos_adj = (pos_adj * runtime->rate + 47999) / 48000;
if (!pos_adj)
pos_adj = 1;
pos_adj = pos_align;
else
pos_adj = ((pos_adj + pos_align - 1) / pos_align) *
pos_align;
pos_adj = frames_to_bytes(runtime, pos_adj);
if (pos_adj >= period_bytes) {
snd_printk(KERN_WARNING "Too big adjustment %d\n",