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ASoC/mpc5200: fix enable/disable of AC97 slots

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The MPC5200 AC97 driver is disabling the slots when a stop
trigger is received, but not reenabling them if the stream
is started again without processing the hw_params again.

This patch fixes the problem by caching the slot enable bit
settings calculated at hw_params time so that they can be
reapplied every time the start trigger is received.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
此提交包含在：
Grant Likely
2009-11-07 01:34:43 -07:00
提交者 Mark Brown
父節點 1d8222e8df
當前提交 c939e5c821
共有 2 個檔案被更改，包括 26 行新增 和 19 行删除
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41
sound/soc/fsl/mpc5200_psc_ac97.c
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@@ -130,6 +130,7 @@ static int psc_ac97_hw_analog_params(struct snd_pcm_substream *substream,
struct snd_soc_dai *cpu_dai)
{
struct psc_dma *psc_dma = cpu_dai->private_data;
struct psc_dma_stream *s = to_psc_dma_stream(substream, psc_dma);
dev_dbg(psc_dma->dev, "%s(substream=%p) p_size=%i p_bytes=%i"
" periods=%i buffer_size=%i buffer_bytes=%i channels=%i"
@@ -140,20 +141,10 @@ static int psc_ac97_hw_analog_params(struct snd_pcm_substream *substream,
params_channels(params), params_rate(params),
params_format(params));
if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) {
if (params_channels(params) == 1)
psc_dma->slots |= 0x00000100;
else
psc_dma->slots |= 0x00000300;
} else {
if (params_channels(params) == 1)
psc_dma->slots |= 0x01000000;
else
psc_dma->slots |= 0x03000000;
}
out_be32(&psc_dma->psc_regs->ac97_slots, psc_dma->slots);
/* Determine the set of enable bits to turn on */
s->ac97_slot_bits = (params_channels(params) == 1) ? 0x100 : 0x300;
if (substream->pstr->stream != SNDRV_PCM_STREAM_CAPTURE)
s->ac97_slot_bits <<= 16;
return 0;
}
@@ -163,6 +154,8 @@ static int psc_ac97_hw_digital_params(struct snd_pcm_substream *substream,
{
struct psc_dma *psc_dma = cpu_dai->private_data;
dev_dbg(psc_dma->dev, "%s(substream=%p)\n", __func__, substream);
if (params_channels(params) == 1)
out_be32(&psc_dma->psc_regs->ac97_slots, 0x01000000);
else
@@ -176,14 +169,24 @@ static int psc_ac97_trigger(struct snd_pcm_substream *substream, int cmd,
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct psc_dma *psc_dma = rtd->dai->cpu_dai->private_data;
struct psc_dma_stream *s = to_psc_dma_stream(substream, psc_dma);
switch (cmd) {
case SNDRV_PCM_TRIGGER_STOP:
if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE)
psc_dma->slots &= 0xFFFF0000;
else
psc_dma->slots &= 0x0000FFFF;
case SNDRV_PCM_TRIGGER_START:
dev_dbg(psc_dma->dev, "AC97 START: stream=%i\n",
substream->pstr->stream);
/* Set the slot enable bits */
psc_dma->slots |= s->ac97_slot_bits;
out_be32(&psc_dma->psc_regs->ac97_slots, psc_dma->slots);
break;
case SNDRV_PCM_TRIGGER_STOP:
dev_dbg(psc_dma->dev, "AC97 STOP: stream=%i\n",
substream->pstr->stream);
/* Clear the slot enable bits */
psc_dma->slots &= ~(s->ac97_slot_bits);
out_be32(&psc_dma->psc_regs->ac97_slots, psc_dma->slots);
break;
}