ALSA: emu10k1x: Define channel maps

Provide channel maps for individual stereo streams of emu10k1x.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 21 insertions, 0 deletions

diff --git a/sound/pci/emu10k1/emu10k1x.c b/sound/pci/emu10k1/emu10k1x.c
index 5c8978b2c4d9..556fd6f456e3 100644
--- a/sound/pci/emu10k1/emu10k1x.c
+++ b/sound/pci/emu10k1/emu10k1x.c
@@ -830,9 +830,22 @@ static irqreturn_t snd_emu10k1x_interrupt(int irq, void *dev_id)
         return IRQ_HANDLED;
 }
 
+static const struct snd_pcm_chmap_elem surround_map[] = {
+        { .channels = 2,
+          .map = { SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
+        { }
+};
+
+static const struct snd_pcm_chmap_elem clfe_map[] = {
+        { .channels = 2,
+          .map = { SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE } },
+        { }
+};
+
 static int __devinit snd_emu10k1x_pcm(struct emu10k1x *emu, int device, struct snd_pcm **rpcm)
 {
         struct snd_pcm *pcm;
+        const struct snd_pcm_chmap_elem *map = NULL;
         int err;
         int capture = 0;
   
@@ -861,12 +874,15 @@ static int __devinit snd_emu10k1x_pcm(struct emu10k1x *emu, int device, struct s
         switch(device) {
         case 0:
                 strcpy(pcm->name, "EMU10K1X Front");
+                map = snd_pcm_std_chmaps;
                 break;
         case 1:
                 strcpy(pcm->name, "EMU10K1X Rear");
+                map = surround_map;
                 break;
         case 2:
                 strcpy(pcm->name, "EMU10K1X Center/LFE");
+                map = clfe_map;
                 break;
         }
         emu->pcm = pcm;
@@ -875,6 +891,11 @@ static int __devinit snd_emu10k1x_pcm(struct emu10k1x *emu, int device, struct s
                                               snd_dma_pci_data(emu->pci), 
                                               32*1024, 32*1024);
   
+        err = snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK, map, 2,
+                                     1 << 2, NULL);
+        if (err < 0)
+                return err;
+
         if (rpcm)
                 *rpcm = pcm;