ALSA: AACI: add double-rate support
Russell King [Fri, 18 Dec 2009 17:48:45 +0000 (17:48 +0000)]
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/arm/aaci.c

index b88bbde..b377370 100644 (file)
@@ -366,6 +366,10 @@ static int __aaci_pcm_open(struct aaci *aaci,
        runtime->hw.rates = aacirun->pcm->rates;
        snd_pcm_limit_hw_rates(runtime);
 
+       if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
+           aacirun->pcm->r[1].slots)
+               snd_ac97_pcm_double_rate_rules(runtime);
+
        /*
         * FIXME: ALSA specifies fifo_size in bytes.  If we're in normal
         * mode, each 32-bit word contains one sample.  If we're in
@@ -439,9 +443,12 @@ static int aaci_pcm_hw_params(struct snd_pcm_substream *substream,
        err = snd_pcm_lib_malloc_pages(substream,
                                       params_buffer_bytes(params));
        if (err >= 0) {
-               err = snd_ac97_pcm_open(aacirun->pcm, params_rate(params),
+               unsigned int rate = params_rate(params);
+               int dbl = rate > 48000;
+
+               err = snd_ac97_pcm_open(aacirun->pcm, rate,
                                        params_channels(params),
-                                       aacirun->pcm->r[0].slots);
+                                       aacirun->pcm->r[dbl].slots);
 
                aacirun->pcm_open = err == 0;
                aacirun->cr = CR_FEN | CR_COMPACT | CR_SZ16;
@@ -808,6 +815,12 @@ static struct ac97_pcm ac97_defs[] __devinitdata = {
                                          (1 << AC97_SLOT_PCM_SRIGHT) |
                                          (1 << AC97_SLOT_LFE),
                        },
+                       [1] = {
+                               .slots  = (1 << AC97_SLOT_PCM_LEFT) |
+                                         (1 << AC97_SLOT_PCM_RIGHT) |
+                                         (1 << AC97_SLOT_PCM_LEFT_0) |
+                                         (1 << AC97_SLOT_PCM_RIGHT_0),
+                       },
                },
        },
        [1] = { /* PCM in */