Commit 9e94df3a authored by Pierre-Louis Bossart's avatar Pierre-Louis Bossart Committed by Takashi Iwai
Browse files

ALSA: hda: replace .wallclock by .get_time_info 



No real functional change, only take wall clock and system time
in same routine and add accuracy report.

Signed-off-by: default avatarPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 3179f620

sound/pci/hda/hda_controller.c

+29 −11
Original line number Diff line number Diff line
@@ -732,17 +732,32 @@ static snd_pcm_uframes_t azx_pcm_pointer(struct snd_pcm_substream *substream) 
			       azx_get_position(chip, azx_dev));

}



static int azx_get_wallclock_tstamp(struct snd_pcm_substream *substream,

				struct timespec *ts)

static int azx_get_time_info(struct snd_pcm_substream *substream,

			struct timespec *system_ts, struct timespec *audio_ts,

			struct snd_pcm_audio_tstamp_config *audio_tstamp_config,

			struct snd_pcm_audio_tstamp_report *audio_tstamp_report)

{

	struct azx_dev *azx_dev = get_azx_dev(substream);

	u64 nsec;



	if ((substream->runtime->hw.info & SNDRV_PCM_INFO_HAS_LINK_ATIME) &&

		(audio_tstamp_config->type_requested == SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK)) {



		snd_pcm_gettime(substream->runtime, system_ts);



		nsec = timecounter_read(&azx_dev->azx_tc);

		nsec = div_u64(nsec, 3); /* can be optimized */

		if (audio_tstamp_config->report_delay)

			nsec = azx_adjust_codec_delay(substream, nsec);



	*ts = ns_to_timespec(nsec);

		*audio_ts = ns_to_timespec(nsec);



		audio_tstamp_report->actual_type = SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK;

		audio_tstamp_report->accuracy_report = 1; /* rest of structure is valid */

		audio_tstamp_report->accuracy = 42; /* 24 MHz WallClock == 42ns resolution */



	} else

		audio_tstamp_report->actual_type = SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT;



	return 0;

}
@@ -756,7 +771,8 @@ static struct snd_pcm_hardware azx_pcm_hw = { 
				 /* SNDRV_PCM_INFO_RESUME |*/

				 SNDRV_PCM_INFO_PAUSE |

				 SNDRV_PCM_INFO_SYNC_START |

				 SNDRV_PCM_INFO_HAS_WALL_CLOCK |

				 SNDRV_PCM_INFO_HAS_WALL_CLOCK | /* legacy */

				 SNDRV_PCM_INFO_HAS_LINK_ATIME |

				 SNDRV_PCM_INFO_NO_PERIOD_WAKEUP),

	.formats =		SNDRV_PCM_FMTBIT_S16_LE,

	.rates =		SNDRV_PCM_RATE_48000,
@@ -842,10 +858,12 @@ static int azx_pcm_open(struct snd_pcm_substream *substream) 
		return -EINVAL;

	}



	/* disable WALLCLOCK timestamps for capture streams

	/* disable LINK_ATIME timestamps for capture streams

	   until we figure out how to handle digital inputs */

	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)

		runtime->hw.info &= ~SNDRV_PCM_INFO_HAS_WALL_CLOCK;

	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {

		runtime->hw.info &= ~SNDRV_PCM_INFO_HAS_WALL_CLOCK; /* legacy */

		runtime->hw.info &= ~SNDRV_PCM_INFO_HAS_LINK_ATIME;

	}



	spin_lock_irqsave(&chip->reg_lock, flags);

	azx_dev->substream = substream;
@@ -877,7 +895,7 @@ static struct snd_pcm_ops azx_pcm_ops = { 
	.prepare = azx_pcm_prepare,

	.trigger = azx_pcm_trigger,

	.pointer = azx_pcm_pointer,

	.wall_clock =  azx_get_wallclock_tstamp,

	.get_time_info =  azx_get_time_info,

	.mmap = azx_pcm_mmap,

	.page = snd_pcm_sgbuf_ops_page,

};