[ALSA] ymfpci - make rear channel swap optional

Modules: YMFPCI driver

Added rear_swap module option / kernel parameter to configure the rear
channel swapping. Default value is enable to make the AC3 passthrough
working, but analog only users might revert the previous behaviour.

Signed-off-by: Jaroslav Kysela <perex@suse.cz>

1 files changed, 6 insertions, 4 deletions

diff --git a/include/sound/ymfpci.h b/include/sound/ymfpci.h
index d567bfdbf513..d41cda97e952 100644
--- a/include/sound/ymfpci.h
+++ b/include/sound/ymfpci.h
@@ -269,9 +269,10 @@ struct snd_ymfpci_pcm {
         enum snd_ymfpci_pcm_type type;
         struct snd_pcm_substream *substream;
         struct snd_ymfpci_voice *voices[2];     /* playback only */
-        unsigned int running: 1;
-        unsigned int output_front: 1;
-        unsigned int output_rear: 1;
+        unsigned int running: 1,
+                     output_front: 1,
+                     output_rear: 1,
+                     swap_rear: 1;
         unsigned int update_pcm_vol;
         u32 period_size;                /* cached from runtime->period_size */
         u32 buffer_size;                /* cached from runtime->buffer_size */
@@ -344,6 +345,7 @@ struct snd_ymfpci {
         struct snd_kcontrol *spdif_pcm_ctl;
         int mode_dup4ch;
         int rear_opened;
+        int rear_swap;
         int spdif_opened;
         struct {
                 u16 left;
@@ -376,7 +378,7 @@ 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 snd_ymfpci_mixer(struct snd_ymfpci *chip, int rear_switch, int rear_swap);
 int snd_ymfpci_timer(struct snd_ymfpci *chip, int device);
 
 #endif /* __SOUND_YMFPCI_H */