ALSA: ca0106 - Add IEC958 PCM Stream controls

Added "IEC958 PCM Stream" controls for the per-stream IEC958 status
bits.  Using this instead of "IEC958 Default" is safer since the status
bits will be recovered to the default states after closing the PCM
stream.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

3 files changed, 90 insertions, 26 deletions

diff --git a/sound/pci/ca0106/ca0106.h b/sound/pci/ca0106/ca0106.h
index 1c14ff424116..ec0f17ded4e0 100644
--- a/sound/pci/ca0106/ca0106.h
+++ b/sound/pci/ca0106/ca0106.h
@@ -690,7 +690,8 @@ struct snd_ca0106 {
 
         struct snd_ca0106_channel playback_channels[4];
         struct snd_ca0106_channel capture_channels[4];
-        u32 spdif_bits[4];             /* s/pdif out setup */
+        u32 spdif_bits[4];             /* s/pdif out default setup */
+        u32 spdif_str_bits[4];         /* s/pdif out per-stream setup */
         int spdif_enable;
         int capture_source;
         int i2c_capture_source;
diff --git a/sound/pci/ca0106/ca0106_main.c b/sound/pci/ca0106/ca0106_main.c
index 2c71f9b896cd..c27fd90101d6 100644
--- a/sound/pci/ca0106/ca0106_main.c
+++ b/sound/pci/ca0106/ca0106_main.c
@@ -479,6 +479,15 @@ static const int spi_dacd_bit[] = {
         [PCM_UNKNOWN_CHANNEL]   = SPI_DACD1_BIT,
 };
 
+static void restore_spdif_bits(struct snd_ca0106 *chip, int idx)
+{
+        if (chip->spdif_str_bits[idx] != chip->spdif_bits[idx]) {
+                chip->spdif_str_bits[idx] = chip->spdif_bits[idx];
+                snd_ca0106_ptr_write(chip, SPCS0 + idx, 0,
+                                     chip->spdif_str_bits[idx]);
+        }
+}
+
 /* open_playback callback */
 static int snd_ca0106_pcm_open_playback_channel(struct snd_pcm_substream *substream,
                                                 int channel_id)
@@ -524,6 +533,9 @@ static int snd_ca0106_pcm_open_playback_channel(struct snd_pcm_substream *substr
                 if (err < 0)
                         return err;
         }
+
+        restore_spdif_bits(chip, channel_id);
+
         return 0;
 }
 
@@ -535,6 +547,8 @@ static int snd_ca0106_pcm_close_playback(struct snd_pcm_substream *substream)
         struct snd_ca0106_pcm *epcm = runtime->private_data;
         chip->playback_channels[epcm->channel_id].use = 0;
 
+        restore_spdif_bits(chip, epcm->channel_id);
+
         if (chip->details->spi_dac && epcm->channel_id != PCM_FRONT_CHANNEL) {
                 const int reg = spi_dacd_reg[epcm->channel_id];
 
@@ -1330,16 +1344,16 @@ static void ca0106_init_chip(struct snd_ca0106 *chip, int resume)
                 SPCS_GENERATIONSTATUS | 0x00001200 |
                 0x00000000 | SPCS_EMPHASIS_NONE | SPCS_COPYRIGHT;
         if (!resume) {
-                chip->spdif_bits[0] = def_bits;
-                chip->spdif_bits[1] = def_bits;
-                chip->spdif_bits[2] = def_bits;
-                chip->spdif_bits[3] = def_bits;
+                chip->spdif_str_bits[0] = chip->spdif_bits[0] = def_bits;
+                chip->spdif_str_bits[1] = chip->spdif_bits[1] = def_bits;
+                chip->spdif_str_bits[2] = chip->spdif_bits[2] = def_bits;
+                chip->spdif_str_bits[3] = chip->spdif_bits[3] = def_bits;
         }
         /* Only SPCS1 has been tested */
-        snd_ca0106_ptr_write(chip, SPCS1, 0, chip->spdif_bits[1]);
-        snd_ca0106_ptr_write(chip, SPCS0, 0, chip->spdif_bits[0]);
-        snd_ca0106_ptr_write(chip, SPCS2, 0, chip->spdif_bits[2]);
-        snd_ca0106_ptr_write(chip, SPCS3, 0, chip->spdif_bits[3]);
+        snd_ca0106_ptr_write(chip, SPCS1, 0, chip->spdif_str_bits[1]);
+        snd_ca0106_ptr_write(chip, SPCS0, 0, chip->spdif_str_bits[0]);
+        snd_ca0106_ptr_write(chip, SPCS2, 0, chip->spdif_str_bits[2]);
+        snd_ca0106_ptr_write(chip, SPCS3, 0, chip->spdif_str_bits[3]);
 
         snd_ca0106_ptr_write(chip, PLAYBACK_MUTE, 0, 0x00fc0000);
         snd_ca0106_ptr_write(chip, CAPTURE_MUTE, 0, 0x00fc0000);
diff --git a/sound/pci/ca0106/ca0106_mixer.c b/sound/pci/ca0106/ca0106_mixer.c
index cccc32cdb943..8727881a10b8 100644
--- a/sound/pci/ca0106/ca0106_mixer.c
+++ b/sound/pci/ca0106/ca0106_mixer.c
@@ -148,7 +148,7 @@ static void ca0106_set_capture_mic_line_in(struct snd_ca0106 *emu)
 
 static void ca0106_set_spdif_bits(struct snd_ca0106 *emu, int idx)
 {
-        snd_ca0106_ptr_write(emu, SPCS0 + idx, 0, emu->spdif_bits[idx]);
+        snd_ca0106_ptr_write(emu, SPCS0 + idx, 0, emu->spdif_str_bits[idx]);
 }
 
 /*
@@ -353,16 +353,33 @@ static int snd_ca0106_spdif_info(struct snd_kcontrol *kcontrol,
         return 0;
 }
 
-static int snd_ca0106_spdif_get(struct snd_kcontrol *kcontrol,
+static void decode_spdif_bits(unsigned char *status, unsigned int bits)
+{
+        status[0] = (bits >> 0) & 0xff;
+        status[1] = (bits >> 8) & 0xff;
+        status[2] = (bits >> 16) & 0xff;
+        status[3] = (bits >> 24) & 0xff;
+}
+
+static int snd_ca0106_spdif_get_default(struct snd_kcontrol *kcontrol,
                                  struct snd_ctl_elem_value *ucontrol)
 {
         struct snd_ca0106 *emu = snd_kcontrol_chip(kcontrol);
         unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);
 
-        ucontrol->value.iec958.status[0] = (emu->spdif_bits[idx] >> 0) & 0xff;
-        ucontrol->value.iec958.status[1] = (emu->spdif_bits[idx] >> 8) & 0xff;
-        ucontrol->value.iec958.status[2] = (emu->spdif_bits[idx] >> 16) & 0xff;
-        ucontrol->value.iec958.status[3] = (emu->spdif_bits[idx] >> 24) & 0xff;
+        decode_spdif_bits(ucontrol->value.iec958.status,
+                          emu->spdif_bits[idx]);
+        return 0;
+}
+
+static int snd_ca0106_spdif_get_stream(struct snd_kcontrol *kcontrol,
+                                 struct snd_ctl_elem_value *ucontrol)
+{
+        struct snd_ca0106 *emu = snd_kcontrol_chip(kcontrol);
+        unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);
+
+        decode_spdif_bits(ucontrol->value.iec958.status,
+                          emu->spdif_str_bits[idx]);
         return 0;
 }
 
@@ -376,24 +393,48 @@ static int snd_ca0106_spdif_get_mask(struct snd_kcontrol *kcontrol,
         return 0;
 }
 
-static int snd_ca0106_spdif_put(struct snd_kcontrol *kcontrol,
+static unsigned int encode_spdif_bits(unsigned char *status)
+{
+        return ((unsigned int)status[0] << 0) |
+                ((unsigned int)status[1] << 8) |
+                ((unsigned int)status[2] << 16) |
+                ((unsigned int)status[3] << 24);
+}
+
+static int snd_ca0106_spdif_put_default(struct snd_kcontrol *kcontrol,
                                  struct snd_ctl_elem_value *ucontrol)
 {
         struct snd_ca0106 *emu = snd_kcontrol_chip(kcontrol);
         unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);
-        int change;
         unsigned int val;
 
-        val = (ucontrol->value.iec958.status[0] << 0) |
-              (ucontrol->value.iec958.status[1] << 8) |
-              (ucontrol->value.iec958.status[2] << 16) |
-              (ucontrol->value.iec958.status[3] << 24);
-        change = val != emu->spdif_bits[idx];
-        if (change) {
+        val = encode_spdif_bits(ucontrol->value.iec958.status);
+        if (val != emu->spdif_bits[idx]) {
                 emu->spdif_bits[idx] = val;
+                /* FIXME: this isn't safe, but needed to keep the compatibility
+                 * with older alsa-lib config
+                 */
+                emu->spdif_str_bits[idx] = val;
                 ca0106_set_spdif_bits(emu, idx);
+                return 1;
         }
-        return change;
+        return 0;
+}
+
+static int snd_ca0106_spdif_put_stream(struct snd_kcontrol *kcontrol,
+                                 struct snd_ctl_elem_value *ucontrol)
+{
+        struct snd_ca0106 *emu = snd_kcontrol_chip(kcontrol);
+        unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);
+        unsigned int val;
+
+        val = encode_spdif_bits(ucontrol->value.iec958.status);
+        if (val != emu->spdif_str_bits[idx]) {
+                emu->spdif_str_bits[idx] = val;
+                ca0106_set_spdif_bits(emu, idx);
+                return 1;
+        }
+        return 0;
 }
 
 static int snd_ca0106_volume_info(struct snd_kcontrol *kcontrol,
@@ -604,8 +645,16 @@ static struct snd_kcontrol_new snd_ca0106_volume_ctls[] __devinitdata = {
                 .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
                 .count =        4,
                 .info =         snd_ca0106_spdif_info,
-                .get =          snd_ca0106_spdif_get,
-                .put =          snd_ca0106_spdif_put
+                .get =          snd_ca0106_spdif_get_default,
+                .put =          snd_ca0106_spdif_put_default
+        },
+        {
+                .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
+                .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,PCM_STREAM),
+                .count =        4,
+                .info =         snd_ca0106_spdif_info,
+                .get =          snd_ca0106_spdif_get_stream,
+                .put =          snd_ca0106_spdif_put_stream
         },
 };