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ALSA: x86: Allow no-period-wakeup setup 

In the current implementation, the driver may update the BDs even at
PCM pointer callback.  This allows us to skip the period interrupt
effectively.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2017-02-07 08:09:12 +01:00
parent 8d48c0163d
commit e8de9859e4
1 changed files with 5 additions and 2 deletions
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7
sound/x86/intel_hdmi_audio.c
View File

@ -133,7 +133,8 @@ static const struct channel_map_table map_tables[] = {
static const struct snd_pcm_hardware had_pcm_hardware = {
.info = (SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID),
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_NO_PERIOD_WAKEUP),
.formats = SNDRV_PCM_FMTBIT_S24,
.rates = SNDRV_PCM_RATE_32000 |
SNDRV_PCM_RATE_44100 |
@ -840,7 +841,9 @@ static void had_prog_bd(struct snd_pcm_substream *substream,
int ofs = intelhaddata->pcmbuf_filled * intelhaddata->period_bytes;
u32 addr = substream->runtime->dma_addr + ofs;
addr |= AUD_BUF_VALID | AUD_BUF_INTR_EN;
addr |= AUD_BUF_VALID;
if (!substream->runtime->no_period_wakeup)
addr |= AUD_BUF_INTR_EN;
had_write_register(intelhaddata, AUD_BUF_ADDR(idx), addr);
had_write_register(intelhaddata, AUD_BUF_LEN(idx),
intelhaddata->period_bytes);