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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>
This commit is contained in:
Russell King 2009-12-18 17:48:35 +00:00 коммит произвёл Takashi Iwai
Родитель d49464318a
Коммит 6ca867c827
1 изменённых файлов: 3 добавлений и 72 удалений
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75
sound/arm/aaci.c
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@ -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)