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>
diff --git a/sound/x86/intel_hdmi_audio.c b/sound/x86/intel_hdmi_audio.c
index d213649..80b1ab9 100644
--- a/sound/x86/intel_hdmi_audio.c
+++ b/sound/x86/intel_hdmi_audio.c
@@ -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);
