From e785d3d8fb5fab744d67fac9966229bcdc52db45 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Tue, 15 Jul 2008 16:28:43 +0200 Subject: [PATCH] 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 --- sound/pci/hda/hda_intel.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index 16715a68ba5..ef9f072b47f 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", -- 2.41.0