ASoC: Intel: add SNDRV_PCM_INFO_DRAIN_TRIGGER flag

Add SNDRV_PCM_INFO_DRAIN_TRIGGER in snd_pcm_hardware.info to
call sst_hsw_stream_set_silence_start() when PCM draining.

Signed-off-by: Libin Yang <libin.yang@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/soc/intel/sst-haswell-pcm.c b/sound/soc/intel/sst-haswell-pcm.c
index d6fa9d5..7e21e8f 100644 (file)
--- a/sound/soc/intel/sst-haswell-pcm.c
+++ b/sound/soc/intel/sst-haswell-pcm.c
@@ -91,7 +91,8 @@ static const struct snd_pcm_hardware hsw_pcm_hardware = {
                                  SNDRV_PCM_INFO_INTERLEAVED |
                                  SNDRV_PCM_INFO_PAUSE |
                                  SNDRV_PCM_INFO_RESUME |
-                                 SNDRV_PCM_INFO_NO_PERIOD_WAKEUP,
+                                 SNDRV_PCM_INFO_NO_PERIOD_WAKEUP |
+                                 SNDRV_PCM_INFO_DRAIN_TRIGGER,
        .formats                = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |
                                  SNDRV_PCM_FMTBIT_S32_LE,
        .period_bytes_min       = PAGE_SIZE,