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[ALSA] ymfpci - make rear channel swap optional

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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>
This commit is contained in:
Jaroslav Kysela
2006-01-18 08:02:24 +01:00
parent 12aa757905
commit 5a25c5cfd4
3 changed files with 38 additions and 19 deletions
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10
include/sound/ymfpci.h
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@@ -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 */