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audio/i2s : i2s dma infiniteloop support

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This commit is contained in:
邱建斌
2013-02-02 12:07:11 +08:00
parent a8c373dc42
commit 86ee81f2ac
1 changed files with 69 additions and 43 deletions
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112
sound/soc/rk29/rk29_pcm.c
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@@ -31,11 +31,17 @@
#define PCM_DMA_DEBUG 0
#if 0
#define DBG(x...) printk(KERN_DEBUG x)
#define DBG(x...) printk(KERN_INFO x)
#else
#define DBG(x...) do { } while (0)
#endif
#define INFIN_LOOP
#ifdef INFIN_LOOP
#define DMA_INFIN_LOOP() rk29_dma_has_infiniteloop()
#else
#define DMA_INFIN_LOOP() 0
#endif
static const struct snd_pcm_hardware rockchip_pcm_hardware = {
.info = SNDRV_PCM_INFO_INTERLEAVED |
@@ -97,46 +103,67 @@ static void rockchip_pcm_enqueue(struct snd_pcm_substream *substream)
{
struct rockchip_runtime_data *prtd = substream->runtime->private_data;
dma_addr_t pos = prtd->dma_pos;
unsigned int limit;
int ret;
// DBG("Enter::%s----%d\n",__FUNCTION__,__LINE__);
while (prtd->dma_loaded < prtd->dma_limit) {
unsigned long len = prtd->dma_period;
// DBG("dma_loaded: %d\n", prtd->dma_loaded);
if ((pos + len) > prtd->dma_end) {
len = prtd->dma_end - pos;
printk("Enter::%s----%d prtd->dma_period = %d prtd->dma_limit = %d\n",__FUNCTION__,__LINE__,prtd->dma_period,prtd->dma_limit);
if (rk29_dma_has_circular())
limit = (prtd->dma_end - prtd->dma_start) / prtd->dma_period;
else
limit = prtd->dma_limit;
if (DMA_INFIN_LOOP()) {
if(prtd->dma_period % prtd->params->dma_size*16){
WARN_ON(1);
rk29_dma_config(prtd->params->channel,
prtd->params->dma_size, 1);
}
else
rk29_dma_config(prtd->params->channel,
prtd->params->dma_size, 16);
ret = rk29_dma_enqueue_ring(prtd->params->channel,
substream, pos, prtd->dma_period, limit ,true);
if (ret == 0)
pos = prtd->dma_start;
} else {
while (prtd->dma_loaded < prtd->dma_limit) {
unsigned long len = prtd->dma_period;
// DBG("dma_loaded: %d\n", prtd->dma_loaded);
if ((pos + len) > prtd->dma_end) {
len = prtd->dma_end - pos;
}
if((len%(prtd->params->dma_size*16) == 0) && (prtd->params->flag == 1))
{
ret = rk29_dma_config(prtd->params->channel,
prtd->params->dma_size, 16);
prtd->params->flag = 0;
DBG("size = 16, channel = %d, flag = %d\n",prtd->params->channel,prtd->params->flag);
}
else if((len%(prtd->params->dma_size*16) != 0) && (prtd->params->flag == 0))
{
ret = rk29_dma_config(prtd->params->channel,
prtd->params->dma_size, 1);
prtd->params->flag = 1;
DBG("size = 1, channel = %d, flag = %d\n",prtd->params->channel,prtd->params->flag);
}
ret = rk29_dma_enqueue(prtd->params->channel,substream, pos, len);
// if(prtd->params->channel == 2)
DBG("Enter::%s, %d, ret=%d, Channel=%d, Addr=0x%X, Len=%lu\n",
__FUNCTION__,__LINE__, ret, prtd->params->channel, pos, len);
if (ret == 0) {
prtd->dma_loaded++;
pos += prtd->dma_period;
if (pos >= prtd->dma_end)
pos = prtd->dma_start;
} else
break;
}
if((len%(prtd->params->dma_size*16) == 0) && (prtd->params->flag == 1))
{
ret = rk29_dma_config(prtd->params->channel,
prtd->params->dma_size, 16);
prtd->params->flag = 0;
DBG("size = 16, channel = %d, flag = %d\n",prtd->params->channel,prtd->params->flag);
}
else if((len%(prtd->params->dma_size*16) != 0) && (prtd->params->flag == 0))
{
ret = rk29_dma_config(prtd->params->channel,
prtd->params->dma_size, 1);
prtd->params->flag = 1;
DBG("size = 1, channel = %d, flag = %d\n",prtd->params->channel,prtd->params->flag);
}
ret = rk29_dma_enqueue(prtd->params->channel,substream, pos, len);
// if(prtd->params->channel == 2)
DBG("Enter::%s, %d, ret=%d, Channel=%d, Addr=0x%X, Len=%lu\n",
__FUNCTION__,__LINE__, ret, prtd->params->channel, pos, len);
if (ret == 0) {
prtd->dma_loaded++;
pos += prtd->dma_period;
if (pos >= prtd->dma_end)
pos = prtd->dma_start;
} else
break;
}
prtd->dma_pos = pos;
}
@@ -153,7 +180,7 @@ void rk29_audio_buffdone(void *dev_id, int size,
t = ktime_to_us(ktime_sub(after, before));
if(result == RK29_RES_OK)
{
if(t > 23220+73 && t != ktime_to_us(after)) // 4096/4/44100 + 32/44100
if(t > prtd->dma_period/4/44100 +73 && t != ktime_to_us(after)) // (23220)4096/4/44100 + 32/44100
{
printk(KERN_DEBUG "Time out:: Audio DMA buffdone time out!!! the time = %lld!\n", t);
}
@@ -184,19 +211,18 @@ void rk29_audio_buffdone(void *dev_id, int size,
prtd = substream->runtime->private_data;
// if(prtd->params->channel == 2)
DBG("Enter::%s----%d channel =%d \n",__FUNCTION__,__LINE__);
DBG("Enter::%s----%d channel =%d \n",__FUNCTION__,__LINE__,prtd->params->channel);
if(!(prtd->state & ST_RUNNING))
return;
if (substream){
snd_pcm_period_elapsed(substream);
}
spin_lock(&prtd->lock);
prtd->dma_loaded--;
if (prtd->state & ST_RUNNING) {
if (!DMA_INFIN_LOOP() && prtd->state & ST_RUNNING) {
prtd->dma_loaded--;
rockchip_pcm_enqueue(substream);
}
spin_unlock(&prtd->lock);
spin_unlock(&prtd->lock);
}
static int rockchip_pcm_hw_params(struct snd_pcm_substream *substream,