diff --git a/include/sound/ymfpci.h b/include/sound/ymfpci.h
index d41cda97e952..a3c5de59a248 100644
--- a/include/sound/ymfpci.h
+++ b/include/sound/ymfpci.h
@@ -345,7 +345,6 @@ struct snd_ymfpci {
 	struct snd_kcontrol *spdif_pcm_ctl;
 	int mode_dup4ch;
 	int rear_opened;
-	int rear_swap;
 	int spdif_opened;
 	struct {
 		u16 left;
@@ -378,7 +377,7 @@ int snd_ymfpci_pcm(struct snd_ymfpci *chip, int device, struct snd_pcm **rpcm);
 int snd_ymfpci_pcm2(struct snd_ymfpci *chip, int device, struct snd_pcm **rpcm);
 int snd_ymfpci_pcm_spdif(struct snd_ymfpci *chip, int device, struct snd_pcm **rpcm);
 int snd_ymfpci_pcm_4ch(struct snd_ymfpci *chip, int device, struct snd_pcm **rpcm);
-int snd_ymfpci_mixer(struct snd_ymfpci *chip, int rear_switch, int rear_swap);
+int snd_ymfpci_mixer(struct snd_ymfpci *chip, int rear_switch);
 int snd_ymfpci_timer(struct snd_ymfpci *chip, int device);
 
 #endif /* __SOUND_YMFPCI_H */
diff --git a/sound/pci/ymfpci/ymfpci.c b/sound/pci/ymfpci/ymfpci.c
index 186453f7abe7..fd9b7b83a884 100644
--- a/sound/pci/ymfpci/ymfpci.c
+++ b/sound/pci/ymfpci/ymfpci.c
@@ -49,7 +49,6 @@ static long mpu_port[SNDRV_CARDS];
 static long joystick_port[SNDRV_CARDS];
 #endif
 static int rear_switch[SNDRV_CARDS];
-static int rear_swap[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = 1 };
 
 module_param_array(index, int, NULL, 0444);
 MODULE_PARM_DESC(index, "Index value for the Yamaha DS-1 PCI soundcard.");
@@ -67,8 +66,6 @@ MODULE_PARM_DESC(joystick_port, "Joystick port address");
 #endif
 module_param_array(rear_switch, bool, NULL, 0444);
 MODULE_PARM_DESC(rear_switch, "Enable shared rear/line-in switch");
-module_param_array(rear_swap, bool, NULL, 0444);
-MODULE_PARM_DESC(rear_swap, "Swap rear channels (must be enabled for correct IEC958 (S/PDIF)) output");
 
 static struct pci_device_id snd_ymfpci_ids[] = {
         { 0x1073, 0x0004, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0, },   /* YMF724 */
@@ -298,7 +295,7 @@ static int __devinit snd_card_ymfpci_probe(struct pci_dev *pci,
 		snd_card_free(card);
 		return err;
 	}
-	if ((err = snd_ymfpci_mixer(chip, rear_switch[dev], rear_swap[dev])) < 0) {
+	if ((err = snd_ymfpci_mixer(chip, rear_switch[dev])) < 0) {
 		snd_card_free(card);
 		return err;
 	}
diff --git a/sound/pci/ymfpci/ymfpci_main.c b/sound/pci/ymfpci/ymfpci_main.c
index 79c58f3a6b7c..16be1f395484 100644
--- a/sound/pci/ymfpci/ymfpci_main.c
+++ b/sound/pci/ymfpci/ymfpci_main.c
@@ -910,7 +910,7 @@ static int snd_ymfpci_playback_open(struct snd_pcm_substream *substream)
 	ypcm = runtime->private_data;
 	ypcm->output_front = 1;
 	ypcm->output_rear = chip->mode_dup4ch ? 1 : 0;
-	ypcm->swap_rear = chip->rear_swap;
+	ypcm->swap_rear = 0;
 	spin_lock_irq(&chip->reg_lock);
 	if (ypcm->output_rear) {
 		ymfpci_open_extension(chip);
@@ -936,6 +936,7 @@ static int snd_ymfpci_playback_spdif_open(struct snd_pcm_substream *substream)
 	ypcm = runtime->private_data;
 	ypcm->output_front = 0;
 	ypcm->output_rear = 1;
+	ypcm->swap_rear = 1;
 	spin_lock_irq(&chip->reg_lock);
 	snd_ymfpci_writew(chip, YDSXGR_SPDIFOUTCTRL,
 			  snd_ymfpci_readw(chip, YDSXGR_SPDIFOUTCTRL) | 2);
@@ -963,6 +964,7 @@ static int snd_ymfpci_playback_4ch_open(struct snd_pcm_substream *substream)
 	ypcm = runtime->private_data;
 	ypcm->output_front = 0;
 	ypcm->output_rear = 1;
+	ypcm->swap_rear = 0;
 	spin_lock_irq(&chip->reg_lock);
 	ymfpci_open_extension(chip);
 	chip->rear_opened++;
@@ -1755,7 +1757,7 @@ static void snd_ymfpci_mixer_free_ac97(struct snd_ac97 *ac97)
 	chip->ac97 = NULL;
 }
 
-int __devinit snd_ymfpci_mixer(struct snd_ymfpci *chip, int rear_switch, int rear_swap)
+int __devinit snd_ymfpci_mixer(struct snd_ymfpci *chip, int rear_switch)
 {
 	struct snd_ac97_template ac97;
 	struct snd_kcontrol *kctl;
@@ -1767,7 +1769,6 @@ int __devinit snd_ymfpci_mixer(struct snd_ymfpci *chip, int rear_switch, int rea
 		.read = snd_ymfpci_codec_read,
 	};
 
-	chip->rear_swap = rear_swap;
 	if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus)) < 0)
 		return err;
 	chip->ac97_bus->private_free = snd_ymfpci_mixer_free_ac97_bus;
@@ -2322,7 +2323,6 @@ int __devinit snd_ymfpci_create(struct snd_card *card,
 		return -EIO;
 	}
 
-	chip->rear_swap = 1;
 	if ((err = snd_ymfpci_ac3_init(chip)) < 0) {
 		snd_ymfpci_free(chip);
 		return err;