[ALSA] remove incorrect usage of SNDRV_PCM_INFO_SYNC_START and snd_pcm_set_sync()

Set the SNDRV_PCM_INFO_SYNC_START flag and the substream's sync ID
(only) if the substream actually can be linked to another one.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

1 files changed, 6 insertions, 4 deletions

diff --git a/sound/pci/ca0106/ca0106_main.c b/sound/pci/ca0106/ca0106_main.c
index c7f79be98d04..31d8db9f7a4c 100644
--- a/sound/pci/ca0106/ca0106_main.c
+++ b/sound/pci/ca0106/ca0106_main.c
@@ -274,10 +274,11 @@ static struct snd_ca0106_details ca0106_chip_details[] = {
 
 /* hardware definition */
 static struct snd_pcm_hardware snd_ca0106_playback_hw = {
-        .info =                 (SNDRV_PCM_INFO_MMAP | 
-                                 SNDRV_PCM_INFO_INTERLEAVED |
-                                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
-                                 SNDRV_PCM_INFO_MMAP_VALID),
+        .info =                 SNDRV_PCM_INFO_MMAP | 
+                                SNDRV_PCM_INFO_INTERLEAVED |
+                                SNDRV_PCM_INFO_BLOCK_TRANSFER |
+                                SNDRV_PCM_INFO_MMAP_VALID |
+                                SNDRV_PCM_INFO_SYNC_START,
         .formats =              SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE,
         .rates =                (SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000 |
                                  SNDRV_PCM_RATE_192000),
@@ -507,6 +508,7 @@ static int snd_ca0106_pcm_open_playback_channel(struct snd_pcm_substream *substr
                 return err;
         if ((err = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 64)) < 0)
                 return err;
+        snd_pcm_set_sync(substream);
 
         if (chip->details->spi_dac && channel_id != PCM_FRONT_CHANNEL) {
                 const int reg = spi_dacd_reg[channel_id];