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authorRussell King <rmk+kernel@arm.linux.org.uk>2009-12-18 17:48:35 +0000
committerTakashi Iwai <tiwai@suse.de>2009-12-18 20:28:43 +0100
commit6ca867c827c84d21316e9dc4035abe9480f8347c (patch)
treec495856269edd99a74e262dcceda15cea8efd3b9 /sound/arm
parentd49464318a7c51676c44cbd1e2480f651cc43807 (diff)
downloadlinux-linaro-6ca867c827c84d21316e9dc4035abe9480f8347c.tar.gz
ALSA: AACI: simplify codec rate information
There's no need for a specific rule; ALSA's generic AC'97 support calculates the necessary rate constraint information itself, and we can use this directly. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/arm')
-rw-r--r--sound/arm/aaci.c75
1 files changed, 3 insertions, 72 deletions
diff --git a/sound/arm/aaci.c b/sound/arm/aaci.c
index ae38f2c342c..ea3be874c84 100644
--- a/sound/arm/aaci.c
+++ b/sound/arm/aaci.c
@@ -330,63 +330,6 @@ static irqreturn_t aaci_irq(int irq, void *devid)
/*
* ALSA support.
*/
-
-struct aaci_stream {
- unsigned char codec_idx;
- unsigned char rate_idx;
-};
-
-static struct aaci_stream aaci_streams[] = {
- [ACSTREAM_FRONT] = {
- .codec_idx = 0,
- .rate_idx = AC97_RATES_FRONT_DAC,
- },
- [ACSTREAM_SURROUND] = {
- .codec_idx = 0,
- .rate_idx = AC97_RATES_SURR_DAC,
- },
- [ACSTREAM_LFE] = {
- .codec_idx = 0,
- .rate_idx = AC97_RATES_LFE_DAC,
- },
-};
-
-static inline unsigned int aaci_rate_mask(struct aaci *aaci, int streamid)
-{
- struct aaci_stream *s = aaci_streams + streamid;
- return aaci->ac97_bus->codec[s->codec_idx]->rates[s->rate_idx];
-}
-
-static unsigned int rate_list[] = {
- 5512, 8000, 11025, 16000, 22050, 32000, 44100,
- 48000, 64000, 88200, 96000, 176400, 192000
-};
-
-/*
- * Double-rate rule: we can support double rate iff channels == 2
- * (unimplemented)
- */
-static int
-aaci_rule_rate_by_channels(struct snd_pcm_hw_params *p, struct snd_pcm_hw_rule *rule)
-{
- struct aaci *aaci = rule->private;
- unsigned int rate_mask = SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_5512;
- struct snd_interval *c = hw_param_interval(p, SNDRV_PCM_HW_PARAM_CHANNELS);
-
- switch (c->max) {
- case 6:
- rate_mask &= aaci_rate_mask(aaci, ACSTREAM_LFE);
- case 4:
- rate_mask &= aaci_rate_mask(aaci, ACSTREAM_SURROUND);
- case 2:
- rate_mask &= aaci_rate_mask(aaci, ACSTREAM_FRONT);
- }
-
- return snd_interval_list(hw_param_interval(p, rule->var),
- ARRAY_SIZE(rate_list), rate_list,
- rate_mask);
-}
-
static struct snd_pcm_hardware aaci_hw_info = {
.info = SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
@@ -400,10 +343,7 @@ static struct snd_pcm_hardware aaci_hw_info = {
*/
.formats = SNDRV_PCM_FMTBIT_S16_LE,
- /* should this be continuous or knot? */
- .rates = SNDRV_PCM_RATE_CONTINUOUS,
- .rate_max = 48000,
- .rate_min = 4000,
+ /* rates are setup from the AC'97 codec */
.channels_min = 2,
.channels_max = 6,
.buffer_bytes_max = 64 * 1024,
@@ -423,6 +363,8 @@ static int __aaci_pcm_open(struct aaci *aaci,
aacirun->substream = substream;
runtime->private_data = aacirun;
runtime->hw = aaci_hw_info;
+ runtime->hw.rates = aacirun->pcm->rates;
+ snd_pcm_limit_hw_rates(runtime);
/*
* FIXME: ALSA specifies fifo_size in bytes. If we're in normal
@@ -433,17 +375,6 @@ static int __aaci_pcm_open(struct aaci *aaci,
*/
runtime->hw.fifo_size = aaci->fifosize * 2;
- /*
- * Add rule describing hardware rate dependency
- * on the number of channels.
- */
- ret = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
- aaci_rule_rate_by_channels, aaci,
- SNDRV_PCM_HW_PARAM_CHANNELS,
- SNDRV_PCM_HW_PARAM_RATE, -1);
- if (ret)
- goto out;
-
ret = request_irq(aaci->dev->irq[0], aaci_irq, IRQF_SHARED|IRQF_DISABLED,
DRIVER_NAME, aaci);
if (ret)