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>

1 files changed, 22 insertions, 8 deletions

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);