From e8de9859e4e834a74da824e13070aa992c32de10 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Tue, 7 Feb 2017 08:09:12 +0100 Subject: [PATCH] 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 --- sound/x86/intel_hdmi_audio.c | 7 +++++-- 1 file 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);