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ALSA: AACI: fix channel mask selection 

When double-rate mode was selected, we weren't setting the additional
two channel mask bits to allow double-rate to work.  Rearrange the
hw_params code to allow the correct channel mask to be selected.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2011-01-26 16:59:39 +00:00
parent e831d80b45
commit 58e8a4741b
1 changed files with 20 additions and 50 deletions
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70
sound/arm/aaci.c
View File

@ -490,12 +490,21 @@ static int aaci_pcm_hw_free(struct snd_pcm_substream *substream)
return 0;
}
/* Channel to slot mask */
static const u32 channels_to_slotmask[] = {
[2] = CR_SL3 | CR_SL4,
[4] = CR_SL3 | CR_SL4 | CR_SL7 | CR_SL8,
[6] = CR_SL3 | CR_SL4 | CR_SL7 | CR_SL8 | CR_SL6 | CR_SL9,
};
static int aaci_pcm_hw_params(struct snd_pcm_substream *substream,
struct aaci_runtime *aacirun,
struct snd_pcm_hw_params *params)
{
struct aaci_runtime *aacirun = substream->runtime->private_data;
unsigned int channels = params_channels(params);
unsigned int rate = params_rate(params);
int dbl = rate > 48000;
int err;
struct aaci *aaci = substream->private_data;
aaci_pcm_hw_free(substream);
if (aacirun->pcm_open) {
@ -503,18 +512,21 @@ static int aaci_pcm_hw_params(struct snd_pcm_substream *substream,
aacirun->pcm_open = 0;
}
/* channels is already limited to 2, 4, or 6 by aaci_rule_channels */
if (dbl && channels != 2)
return -EINVAL;
err = snd_pcm_lib_malloc_pages(substream,
params_buffer_bytes(params));
if (err >= 0) {
unsigned int rate = params_rate(params);
int dbl = rate > 48000;
struct aaci *aaci = substream->private_data;
err = snd_ac97_pcm_open(aacirun->pcm, rate,
params_channels(params),
err = snd_ac97_pcm_open(aacirun->pcm, rate, channels,
aacirun->pcm->r[dbl].slots);
aacirun->pcm_open = err == 0;
aacirun->cr = CR_FEN | CR_COMPACT | CR_SZ16;
aacirun->cr |= channels_to_slotmask[channels + dbl * 2];
aacirun->fifosz = aaci->fifosize * 4;
if (aacirun->cr & CR_COMPACT)
@ -551,34 +563,6 @@ static snd_pcm_uframes_t aaci_pcm_pointer(struct snd_pcm_substream *substream)
/*
* Playback specific ALSA stuff
*/
static const u32 channels_to_txmask[] = {
[2] = CR_SL3 | CR_SL4,
[4] = CR_SL3 | CR_SL4 | CR_SL7 | CR_SL8,
[6] = CR_SL3 | CR_SL4 | CR_SL7 | CR_SL8 | CR_SL6 | CR_SL9,
};
static int aaci_pcm_playback_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct aaci_runtime *aacirun = substream->runtime->private_data;
unsigned int channels = params_channels(params);
int ret;
WARN_ON(channels >= ARRAY_SIZE(channels_to_txmask) ||
!channels_to_txmask[channels]);
ret = aaci_pcm_hw_params(substream, aacirun, params);
/*
* Enable FIFO, compact mode, 16 bits per sample.
* FIXME: double rate slots?
*/
if (ret >= 0)
aacirun->cr |= channels_to_txmask[channels];
return ret;
}
static void aaci_pcm_playback_stop(struct aaci_runtime *aacirun)
{
u32 ie;
@ -648,27 +632,13 @@ static struct snd_pcm_ops aaci_playback_ops = {
.open = aaci_pcm_open,
.close = aaci_pcm_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = aaci_pcm_playback_hw_params,
.hw_params = aaci_pcm_hw_params,
.hw_free = aaci_pcm_hw_free,
.prepare = aaci_pcm_prepare,
.trigger = aaci_pcm_playback_trigger,
.pointer = aaci_pcm_pointer,
};
static int aaci_pcm_capture_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct aaci_runtime *aacirun = substream->runtime->private_data;
int ret;
ret = aaci_pcm_hw_params(substream, aacirun, params);
if (ret >= 0)
/* Line in record: slot 3 and 4 */
aacirun->cr |= CR_SL3 | CR_SL4;
return ret;
}
static void aaci_pcm_capture_stop(struct aaci_runtime *aacirun)
{
u32 ie;
@ -765,7 +735,7 @@ static struct snd_pcm_ops aaci_capture_ops = {
.open = aaci_pcm_open,
.close = aaci_pcm_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = aaci_pcm_capture_hw_params,
.hw_params = aaci_pcm_hw_params,
.hw_free = aaci_pcm_hw_free,
.prepare = aaci_pcm_capture_prepare,
.trigger = aaci_pcm_capture_trigger,