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Commit e8de9859 authored by Takashi Iwai's avatar Takashi Iwai
Browse files

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: default avatarTakashi Iwai <tiwai@suse.de>
parent 8d48c016

sound/x86/intel_hdmi_audio.c

+5 −2
Original line number Original line Diff line number Diff line
@@ -133,7 +133,8 @@ static const struct channel_map_table map_tables[] = { 
static const struct snd_pcm_hardware had_pcm_hardware = {

static const struct snd_pcm_hardware had_pcm_hardware = {

	.info =	(SNDRV_PCM_INFO_INTERLEAVED |

	.info =	(SNDRV_PCM_INFO_INTERLEAVED |

		SNDRV_PCM_INFO_MMAP |

		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,

	.formats = SNDRV_PCM_FMTBIT_S24,

	.rates = SNDRV_PCM_RATE_32000 |

	.rates = SNDRV_PCM_RATE_32000 |

		SNDRV_PCM_RATE_44100 |

		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;

	int ofs = intelhaddata->pcmbuf_filled * intelhaddata->period_bytes;

	u32 addr = substream->runtime->dma_addr + ofs;

	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_ADDR(idx), addr);

	had_write_register(intelhaddata, AUD_BUF_LEN(idx),

	had_write_register(intelhaddata, AUD_BUF_LEN(idx),

			   intelhaddata->period_bytes);

			   intelhaddata->period_bytes);