[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>

12 files changed, 32 insertions, 50 deletions

diff --git a/sound/isa/ad1816a/ad1816a_lib.c b/sound/isa/ad1816a/ad1816a_lib.c
index ec9209cd5177..cf18fe4617a1 100644
--- a/sound/isa/ad1816a/ad1816a_lib.c
+++ b/sound/isa/ad1816a/ad1816a_lib.c
@@ -453,7 +453,6 @@ static int snd_ad1816a_playback_open(struct snd_pcm_substream *substream)
 
         if ((error = snd_ad1816a_open(chip, AD1816A_MODE_PLAYBACK)) < 0)
                 return error;
-        snd_pcm_set_sync(substream);
         runtime->hw = snd_ad1816a_playback;
         snd_pcm_limit_isa_dma_size(chip->dma1, &runtime->hw.buffer_bytes_max);
         snd_pcm_limit_isa_dma_size(chip->dma1, &runtime->hw.period_bytes_max);
@@ -469,7 +468,6 @@ static int snd_ad1816a_capture_open(struct snd_pcm_substream *substream)
 
         if ((error = snd_ad1816a_open(chip, AD1816A_MODE_CAPTURE)) < 0)
                 return error;
-        snd_pcm_set_sync(substream);
         runtime->hw = snd_ad1816a_capture;
         snd_pcm_limit_isa_dma_size(chip->dma2, &runtime->hw.buffer_bytes_max);
         snd_pcm_limit_isa_dma_size(chip->dma2, &runtime->hw.period_bytes_max);
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];
diff --git a/sound/pci/cs4281.c b/sound/pci/cs4281.c
index 44cf54607647..1fca49a1641a 100644
--- a/sound/pci/cs4281.c
+++ b/sound/pci/cs4281.c
@@ -842,12 +842,11 @@ static snd_pcm_uframes_t snd_cs4281_pointer(struct snd_pcm_substream *substream)
 
 static struct snd_pcm_hardware snd_cs4281_playback =
 {
-        .info =                 (SNDRV_PCM_INFO_MMAP |
-                                 SNDRV_PCM_INFO_INTERLEAVED |
-                                 SNDRV_PCM_INFO_MMAP_VALID |
-                                 SNDRV_PCM_INFO_PAUSE |
-                                 SNDRV_PCM_INFO_RESUME |
-                                 SNDRV_PCM_INFO_SYNC_START),
+        .info =                 SNDRV_PCM_INFO_MMAP |
+                                SNDRV_PCM_INFO_INTERLEAVED |
+                                SNDRV_PCM_INFO_MMAP_VALID |
+                                SNDRV_PCM_INFO_PAUSE |
+                                SNDRV_PCM_INFO_RESUME,
         .formats =              SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S8 |
                                 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_S16_LE |
                                 SNDRV_PCM_FMTBIT_U16_BE | SNDRV_PCM_FMTBIT_S16_BE |
@@ -868,12 +867,11 @@ static struct snd_pcm_hardware snd_cs4281_playback =
 
 static struct snd_pcm_hardware snd_cs4281_capture =
 {
-        .info =                 (SNDRV_PCM_INFO_MMAP |
-                                 SNDRV_PCM_INFO_INTERLEAVED |
-                                 SNDRV_PCM_INFO_MMAP_VALID |
-                                 SNDRV_PCM_INFO_PAUSE |
-                                 SNDRV_PCM_INFO_RESUME |
-                                 SNDRV_PCM_INFO_SYNC_START),
+        .info =                 SNDRV_PCM_INFO_MMAP |
+                                SNDRV_PCM_INFO_INTERLEAVED |
+                                SNDRV_PCM_INFO_MMAP_VALID |
+                                SNDRV_PCM_INFO_PAUSE |
+                                SNDRV_PCM_INFO_RESUME,
         .formats =              SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S8 |
                                 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_S16_LE |
                                 SNDRV_PCM_FMTBIT_U16_BE | SNDRV_PCM_FMTBIT_S16_BE |
@@ -904,7 +902,6 @@ static int snd_cs4281_playback_open(struct snd_pcm_substream *substream)
         dma->right_slot = 1;
         runtime->private_data = dma;
         runtime->hw = snd_cs4281_playback;
-        snd_pcm_set_sync(substream);
         /* should be detected from the AC'97 layer, but it seems
            that although CS4297A rev B reports 18-bit ADC resolution,
            samples are 20-bit */
@@ -924,7 +921,6 @@ static int snd_cs4281_capture_open(struct snd_pcm_substream *substream)
         dma->right_slot = 11;
         runtime->private_data = dma;
         runtime->hw = snd_cs4281_capture;
-        snd_pcm_set_sync(substream);
         /* should be detected from the AC'97 layer, but it seems
            that although CS4297A rev B reports 18-bit ADC resolution,
            samples are 20-bit */
diff --git a/sound/pci/cs5535audio/cs5535audio_pcm.c b/sound/pci/cs5535audio/cs5535audio_pcm.c
index 5450a9e8f133..ec920cbb2a71 100644
--- a/sound/pci/cs5535audio/cs5535audio_pcm.c
+++ b/sound/pci/cs5535audio/cs5535audio_pcm.c
@@ -43,7 +43,6 @@ static struct snd_pcm_hardware snd_cs5535audio_playback =
                                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
                                 SNDRV_PCM_INFO_MMAP_VALID |
                                 SNDRV_PCM_INFO_PAUSE |
-                                SNDRV_PCM_INFO_SYNC_START |
                                 SNDRV_PCM_INFO_RESUME
                                 ),
         .formats =              (
@@ -71,8 +70,7 @@ static struct snd_pcm_hardware snd_cs5535audio_capture =
                                 SNDRV_PCM_INFO_MMAP |
                                 SNDRV_PCM_INFO_INTERLEAVED |
                                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
-                                SNDRV_PCM_INFO_MMAP_VALID |
-                                SNDRV_PCM_INFO_SYNC_START
+                                SNDRV_PCM_INFO_MMAP_VALID
                                 ),
         .formats =              (
                                 SNDRV_PCM_FMTBIT_S16_LE
@@ -102,7 +100,6 @@ static int snd_cs5535audio_playback_open(struct snd_pcm_substream *substream)
         runtime->hw = snd_cs5535audio_playback;
         cs5535au->playback_substream = substream;
         runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK]);
-        snd_pcm_set_sync(substream);
         if ((err = snd_pcm_hw_constraint_integer(runtime,
                                 SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
                 return err;
@@ -348,7 +345,6 @@ static int snd_cs5535audio_capture_open(struct snd_pcm_substream *substream)
         runtime->hw = snd_cs5535audio_capture;
         cs5535au->capture_substream = substream;
         runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE]);
-        snd_pcm_set_sync(substream);
         if ((err = snd_pcm_hw_constraint_integer(runtime,
                                          SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
                 return err;
diff --git a/sound/pci/emu10k1/p16v.c b/sound/pci/emu10k1/p16v.c
index 6ace1076c19b..d619a3842cdd 100644
--- a/sound/pci/emu10k1/p16v.c
+++ b/sound/pci/emu10k1/p16v.c
@@ -124,11 +124,12 @@
 
  /* hardware definition */
 static struct snd_pcm_hardware snd_p16v_playback_hw = {
-        .info =                 (SNDRV_PCM_INFO_MMAP | 
-                                 SNDRV_PCM_INFO_INTERLEAVED |
-                                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
-                                 SNDRV_PCM_INFO_RESUME |
-                                 SNDRV_PCM_INFO_MMAP_VALID),
+        .info =                 SNDRV_PCM_INFO_MMAP | 
+                                SNDRV_PCM_INFO_INTERLEAVED |
+                                SNDRV_PCM_INFO_BLOCK_TRANSFER |
+                                SNDRV_PCM_INFO_RESUME |
+                                SNDRV_PCM_INFO_MMAP_VALID |
+                                SNDRV_PCM_INFO_SYNC_START,
         .formats =              SNDRV_PCM_FMTBIT_S32_LE, /* Only supports 24-bit samples padded to 32 bits. */
         .rates =                SNDRV_PCM_RATE_192000 | SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_44100, 
         .rate_min =             44100,
@@ -207,6 +208,11 @@ static int snd_p16v_pcm_open_playback_channel(struct snd_pcm_substream *substrea
         if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
                 return err;
 
+        runtime->sync.id32[0] = substream->pcm->card->number;
+        runtime->sync.id32[1] = 'P';
+        runtime->sync.id32[2] = 16;
+        runtime->sync.id32[3] = 'V';
+
         return 0;
 }
 /* open_capture callback */
diff --git a/sound/pci/korg1212/korg1212.c b/sound/pci/korg1212/korg1212.c
index 5338243fb035..c4af57fb5af1 100644
--- a/sound/pci/korg1212/korg1212.c
+++ b/sound/pci/korg1212/korg1212.c
@@ -1391,8 +1391,6 @@ static int snd_korg1212_playback_open(struct snd_pcm_substream *substream)
         K1212_DEBUG_PRINTK("K1212_DEBUG: snd_korg1212_playback_open [%s]\n",
                            stateName[korg1212->cardState]);
 
-        snd_pcm_set_sync(substream);    // ???
-
         snd_korg1212_OpenCard(korg1212);
 
         runtime->hw = snd_korg1212_playback_info;
@@ -1422,8 +1420,6 @@ static int snd_korg1212_capture_open(struct snd_pcm_substream *substream)
         K1212_DEBUG_PRINTK("K1212_DEBUG: snd_korg1212_capture_open [%s]\n",
                            stateName[korg1212->cardState]);
 
-        snd_pcm_set_sync(substream);
-
         snd_korg1212_OpenCard(korg1212);
 
         runtime->hw = snd_korg1212_capture_info;
diff --git a/sound/pci/maestro3.c b/sound/pci/maestro3.c
index 8a5ff1cb5362..32245770595e 100644
--- a/sound/pci/maestro3.c
+++ b/sound/pci/maestro3.c
@@ -1821,7 +1821,6 @@ snd_m3_playback_open(struct snd_pcm_substream *subs)
                 return err;
 
         runtime->hw = snd_m3_playback;
-        snd_pcm_set_sync(subs);
 
         return 0;
 }
@@ -1846,7 +1845,6 @@ snd_m3_capture_open(struct snd_pcm_substream *subs)
                 return err;
 
         runtime->hw = snd_m3_capture;
-        snd_pcm_set_sync(subs);
 
         return 0;
 }
diff --git a/sound/pci/mixart/mixart.c b/sound/pci/mixart/mixart.c
index c5109547f43f..880b824e24cd 100644
--- a/sound/pci/mixart/mixart.c
+++ b/sound/pci/mixart/mixart.c
@@ -652,7 +652,7 @@ static int snd_mixart_hw_free(struct snd_pcm_substream *subs)
 static struct snd_pcm_hardware snd_mixart_analog_caps =
 {
         .info             = ( SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
-                              SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_SYNC_START |
+                              SNDRV_PCM_INFO_MMAP_VALID |
                               SNDRV_PCM_INFO_PAUSE),
         .formats          = ( SNDRV_PCM_FMTBIT_U8 |
                               SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |
@@ -673,7 +673,7 @@ static struct snd_pcm_hardware snd_mixart_analog_caps =
 static struct snd_pcm_hardware snd_mixart_digital_caps =
 {
         .info             = ( SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
-                              SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_SYNC_START |
+                              SNDRV_PCM_INFO_MMAP_VALID |
                               SNDRV_PCM_INFO_PAUSE),
         .formats          = ( SNDRV_PCM_FMTBIT_U8 |
                               SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |
diff --git a/sound/pci/nm256/nm256.c b/sound/pci/nm256/nm256.c
index c7621bd770a6..276c5763f0e5 100644
--- a/sound/pci/nm256/nm256.c
+++ b/sound/pci/nm256/nm256.c
@@ -842,7 +842,6 @@ static void snd_nm256_setup_stream(struct nm256 *chip, struct nm256_stream *s,
         runtime->private_data = s;
         s->substream = substream;
 
-        snd_pcm_set_sync(substream);
         snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
                                    &constraints_rates);
 }
diff --git a/sound/pci/pcxhr/pcxhr.c b/sound/pci/pcxhr/pcxhr.c
index 1b787f455576..cd4613a97bd7 100644
--- a/sound/pci/pcxhr/pcxhr.c
+++ b/sound/pci/pcxhr/pcxhr.c
@@ -904,6 +904,8 @@ static int pcxhr_open(struct snd_pcm_substream *subs)
         snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 4);
         snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 4);
 
+        snd_pcm_set_sync(subs);
+
         mgr->ref_count_rate++;
 
         mutex_unlock(&mgr->setup_mutex);
diff --git a/sound/pci/rme96.c b/sound/pci/rme96.c
index 9a4596f879e8..ba4a34bae48f 100644
--- a/sound/pci/rme96.c
+++ b/sound/pci/rme96.c
@@ -1176,8 +1176,6 @@ snd_rme96_playback_spdif_open(struct snd_pcm_substream *substream)
         struct rme96 *rme96 = snd_pcm_substream_chip(substream);
         struct snd_pcm_runtime *runtime = substream->runtime;
 
-        snd_pcm_set_sync(substream);
-
         spin_lock_irq(&rme96->lock);    
         if (rme96->playback_substream != NULL) {
                 spin_unlock_irq(&rme96->lock);
@@ -1214,8 +1212,6 @@ snd_rme96_capture_spdif_open(struct snd_pcm_substream *substream)
         struct rme96 *rme96 = snd_pcm_substream_chip(substream);
         struct snd_pcm_runtime *runtime = substream->runtime;
 
-        snd_pcm_set_sync(substream);
-
         runtime->hw = snd_rme96_capture_spdif_info;
         if (snd_rme96_getinputtype(rme96) != RME96_INPUT_ANALOG &&
             (rate = snd_rme96_capture_getrate(rme96, &isadat)) > 0)
@@ -1247,8 +1243,6 @@ snd_rme96_playback_adat_open(struct snd_pcm_substream *substream)
         struct rme96 *rme96 = snd_pcm_substream_chip(substream);
         struct snd_pcm_runtime *runtime = substream->runtime;        
         
-        snd_pcm_set_sync(substream);
-
         spin_lock_irq(&rme96->lock);    
         if (rme96->playback_substream != NULL) {
                 spin_unlock_irq(&rme96->lock);
@@ -1280,8 +1274,6 @@ snd_rme96_capture_adat_open(struct snd_pcm_substream *substream)
         struct rme96 *rme96 = snd_pcm_substream_chip(substream);
         struct snd_pcm_runtime *runtime = substream->runtime;
 
-        snd_pcm_set_sync(substream);
-
         runtime->hw = snd_rme96_capture_adat_info;
         if (snd_rme96_getinputtype(rme96) == RME96_INPUT_ANALOG) {
                 /* makes no sense to use analog input. Note that analog
diff --git a/sound/ppc/pmac.c b/sound/ppc/pmac.c
index adbc86855b09..04b95ae5c3aa 100644
--- a/sound/ppc/pmac.c
+++ b/sound/ppc/pmac.c
@@ -551,9 +551,6 @@ static int snd_pmac_pcm_open(struct snd_pmac *chip, struct pmac_stream *rec,
 
         runtime->hw.periods_max = rec->cmd.size - 1;
 
-        if (chip->can_duplex)
-                snd_pcm_set_sync(subs);
-
         /* constraints to fix choppy sound */
         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
         return 0;