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>

1 files changed, 5 insertions, 2 deletions

diff --git a/sound/x86/intel_hdmi_audio.c b/sound/x86/intel_hdmi_audio.c
index d2136498defe..80b1ab9b1c57 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);