sound: oxygen: add stereo upmixing to center/LFE channels

Add the possibility to route a mix of the two channels of stereo data to
the center and LFE outputs.  This is implemented only for models where
the DACs support this, i.e., for the Xonar D1 and DX.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 24 insertions, 9 deletions

diff --git a/sound/pci/oxygen/oxygen_mixer.c b/sound/pci/oxygen/oxygen_mixer.c
index e8e911a86c8e..5dfb5fb73381 100644
--- a/sound/pci/oxygen/oxygen_mixer.c
+++ b/sound/pci/oxygen/oxygen_mixer.c
@@ -99,11 +99,15 @@ static int dac_mute_put(struct snd_kcontrol *ctl,
 
 static int upmix_info(struct snd_kcontrol *ctl, struct snd_ctl_elem_info *info)
 {
-        static const char *const names[3] = {
-                "Front", "Front+Surround", "Front+Surround+Back"
+        static const char *const names[5] = {
+                "Front",
+                "Front+Surround",
+                "Front+Surround+Back",
+                "Front+Surround+Center/LFE",
+                "Front+Surround+Center/LFE+Back",
         };
         struct oxygen *chip = ctl->private_data;
-        unsigned int count = 2 + (chip->model.dac_channels == 8);
+        unsigned int count = chip->model.update_center_lfe_mix ? 5 : 3;
 
         info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
         info->count = 1;
@@ -127,7 +131,7 @@ static int upmix_get(struct snd_kcontrol *ctl, struct snd_ctl_elem_value *value)
 void oxygen_update_dac_routing(struct oxygen *chip)
 {
         /* DAC 0: front, DAC 1: surround, DAC 2: center/LFE, DAC 3: back */
-        static const unsigned int reg_values[3] = {
+        static const unsigned int reg_values[5] = {
                 /* stereo -> front */
                 (0 << OXYGEN_PLAY_DAC0_SOURCE_SHIFT) |
                 (1 << OXYGEN_PLAY_DAC1_SOURCE_SHIFT) |
@@ -143,6 +147,16 @@ void oxygen_update_dac_routing(struct oxygen *chip)
                 (0 << OXYGEN_PLAY_DAC1_SOURCE_SHIFT) |
                 (2 << OXYGEN_PLAY_DAC2_SOURCE_SHIFT) |
                 (0 << OXYGEN_PLAY_DAC3_SOURCE_SHIFT),
+                /* stereo -> front+surround+center/LFE */
+                (0 << OXYGEN_PLAY_DAC0_SOURCE_SHIFT) |
+                (0 << OXYGEN_PLAY_DAC1_SOURCE_SHIFT) |
+                (0 << OXYGEN_PLAY_DAC2_SOURCE_SHIFT) |
+                (3 << OXYGEN_PLAY_DAC3_SOURCE_SHIFT),
+                /* stereo -> front+surround+center/LFE+back */
+                (0 << OXYGEN_PLAY_DAC0_SOURCE_SHIFT) |
+                (0 << OXYGEN_PLAY_DAC1_SOURCE_SHIFT) |
+                (0 << OXYGEN_PLAY_DAC2_SOURCE_SHIFT) |
+                (0 << OXYGEN_PLAY_DAC3_SOURCE_SHIFT),
         };
         u8 channels;
         unsigned int reg_value;
@@ -167,22 +181,23 @@ void oxygen_update_dac_routing(struct oxygen *chip)
                               OXYGEN_PLAY_DAC1_SOURCE_MASK |
                               OXYGEN_PLAY_DAC2_SOURCE_MASK |
                               OXYGEN_PLAY_DAC3_SOURCE_MASK);
+        if (chip->model.update_center_lfe_mix)
+                chip->model.update_center_lfe_mix(chip, chip->dac_routing > 2);
 }
 
 static int upmix_put(struct snd_kcontrol *ctl, struct snd_ctl_elem_value *value)
 {
         struct oxygen *chip = ctl->private_data;
-        unsigned int count = 2 + (chip->model.dac_channels == 8);
+        unsigned int count = chip->model.update_center_lfe_mix ? 5 : 3;
         int changed;
 
+        if (value->value.enumerated.item[0] >= count)
+                return -EINVAL;
         mutex_lock(&chip->mutex);
         changed = value->value.enumerated.item[0] != chip->dac_routing;
         if (changed) {
-                chip->dac_routing = min(value->value.enumerated.item[0],
-                                        count - 1);
-                spin_lock_irq(&chip->reg_lock);
+                chip->dac_routing = value->value.enumerated.item[0];
                 oxygen_update_dac_routing(chip);
-                spin_unlock_irq(&chip->reg_lock);
         }
         mutex_unlock(&chip->mutex);
         return changed;