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authorTakashi Iwai <tiwai@suse.de>2008-07-15 16:28:43 +0200
committerTakashi Iwai <tiwai@suse.de>2008-07-16 12:03:24 +0200
commite785d3d8fb5fab744d67fac9966229bcdc52db45 (patch)
treef64a4f3420b62410746f7fae63cb07463340e9db /sound
parent2b30a55d4d09254d6b25814bf6ac0b7843afdc99 (diff)
ALSA: hda - Align BDL position adjustment parameter
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>
Diffstat (limited to 'sound')
-rw-r--r--sound/pci/hda/hda_intel.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 16715a68ba5e..ef9f072b47fc 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -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",

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