ASoC: davinci-pcm: trivial: replace link with actual chan/link
The ambiguously named variable 'link' is used as a temporary throughout davinci-pcm -- its presence makes grepping (and groking) the code difficult. Replace link with the value of link in almost all sites. The exception is a couple places where the last-assigned link/chan needs to be returned by a function -- in these cases, rename to last_link. Signed-off-by: Ben Gardiner <bengardiner@nanometrics.ca> Acked-by: Liam Girdwood <lrg@ti.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Ben Gardiner
Mark Brown
@ -180,7 +180,6 @@ static void davinci_pcm_enqueue_dma(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct davinci_runtime_data *prtd = substream->runtime->private_data;
|
||||
struct snd_pcm_runtime *runtime = substream->runtime;
|
||||
int link = prtd->asp_link[0];
|
||||
unsigned int period_size;
|
||||
unsigned int dma_offset;
|
||||
dma_addr_t dma_pos;
|
||||
@ -198,7 +197,8 @@ static void davinci_pcm_enqueue_dma(struct snd_pcm_substream *substream)
|
||||
fifo_level = prtd->params->fifo_level;
|
||||
|
||||
pr_debug("davinci_pcm: audio_set_dma_params_play channel = %d "
|
||||
"dma_ptr = %x period_size=%x\n", link, dma_pos, period_size);
|
||||
"dma_ptr = %x period_size=%x\n", prtd->asp_link[0], dma_pos,
|
||||
period_size);
|
||||
|
||||
data_type = prtd->params->data_type;
|
||||
count = period_size / data_type;
|
||||
@ -222,17 +222,19 @@ static void davinci_pcm_enqueue_dma(struct snd_pcm_substream *substream)
|
||||
}
|
||||
|
||||
acnt = prtd->params->acnt;
|
||||
edma_set_src(link, src, INCR, W8BIT);
|
||||
edma_set_dest(link, dst, INCR, W8BIT);
|
||||
edma_set_src(prtd->asp_link[0], src, INCR, W8BIT);
|
||||
edma_set_dest(prtd->asp_link[0], dst, INCR, W8BIT);
|
||||
|
||||
edma_set_src_index(link, src_bidx, src_cidx);
|
||||
edma_set_dest_index(link, dst_bidx, dst_cidx);
|
||||
edma_set_src_index(prtd->asp_link[0], src_bidx, src_cidx);
|
||||
edma_set_dest_index(prtd->asp_link[0], dst_bidx, dst_cidx);
|
||||
|
||||
if (!fifo_level)
|
||||
edma_set_transfer_params(link, acnt, count, 1, 0, ASYNC);
|
||||
edma_set_transfer_params(prtd->asp_link[0], acnt, count, 1, 0,
|
||||
ASYNC);
|
||||
else
|
||||
edma_set_transfer_params(link, acnt, fifo_level, count,
|
||||
fifo_level, ABSYNC);
|
||||
edma_set_transfer_params(prtd->asp_link[0], acnt, fifo_level,
|
||||
count, fifo_level,
|
||||
ABSYNC);
|
||||
}
|
||||
|
||||
static void davinci_pcm_dma_irq(unsigned link, u16 ch_status, void *data)
|
||||
@ -305,7 +307,6 @@ static int ping_pong_dma_setup(struct snd_pcm_substream *substream)
|
||||
unsigned int acnt = params->acnt;
|
||||
/* divide by 2 for ping/pong */
|
||||
unsigned int ping_size = snd_pcm_lib_period_bytes(substream) >> 1;
|
||||
int link = prtd->asp_link[1];
|
||||
unsigned int fifo_level = prtd->params->fifo_level;
|
||||
unsigned int count;
|
||||
if ((data_type == 0) || (data_type > 4)) {
|
||||
@ -316,28 +317,26 @@ static int ping_pong_dma_setup(struct snd_pcm_substream *substream)
|
||||
dma_addr_t asp_src_pong = iram_dma->addr + ping_size;
|
||||
ram_src_cidx = ping_size;
|
||||
ram_dst_cidx = -ping_size;
|
||||
edma_set_src(link, asp_src_pong, INCR, W8BIT);
|
||||
edma_set_src(prtd->asp_link[1], asp_src_pong, INCR, W8BIT);
|
||||
|
||||
link = prtd->asp_link[0];
|
||||
edma_set_src_index(link, data_type, data_type * fifo_level);
|
||||
link = prtd->asp_link[1];
|
||||
edma_set_src_index(link, data_type, data_type * fifo_level);
|
||||
edma_set_src_index(prtd->asp_link[0], data_type,
|
||||
data_type * fifo_level);
|
||||
edma_set_src_index(prtd->asp_link[1], data_type,
|
||||
data_type * fifo_level);
|
||||
|
||||
link = prtd->ram_link;
|
||||
edma_set_src(link, runtime->dma_addr, INCR, W32BIT);
|
||||
edma_set_src(prtd->ram_link, runtime->dma_addr, INCR, W32BIT);
|
||||
} else {
|
||||
dma_addr_t asp_dst_pong = iram_dma->addr + ping_size;
|
||||
ram_src_cidx = -ping_size;
|
||||
ram_dst_cidx = ping_size;
|
||||
edma_set_dest(link, asp_dst_pong, INCR, W8BIT);
|
||||
edma_set_dest(prtd->asp_link[1], asp_dst_pong, INCR, W8BIT);
|
||||
|
||||
link = prtd->asp_link[0];
|
||||
edma_set_dest_index(link, data_type, data_type * fifo_level);
|
||||
link = prtd->asp_link[1];
|
||||
edma_set_dest_index(link, data_type, data_type * fifo_level);
|
||||
edma_set_dest_index(prtd->asp_link[0], data_type,
|
||||
data_type * fifo_level);
|
||||
edma_set_dest_index(prtd->asp_link[1], data_type,
|
||||
data_type * fifo_level);
|
||||
|
||||
link = prtd->ram_link;
|
||||
edma_set_dest(link, runtime->dma_addr, INCR, W32BIT);
|
||||
edma_set_dest(prtd->ram_link, runtime->dma_addr, INCR, W32BIT);
|
||||
}
|
||||
|
||||
if (!fifo_level) {
|
||||
@ -354,10 +353,9 @@ static int ping_pong_dma_setup(struct snd_pcm_substream *substream)
|
||||
count, fifo_level, ABSYNC);
|
||||
}
|
||||
|
||||
link = prtd->ram_link;
|
||||
edma_set_src_index(link, ping_size, ram_src_cidx);
|
||||
edma_set_dest_index(link, ping_size, ram_dst_cidx);
|
||||
edma_set_transfer_params(link, ping_size, 2,
|
||||
edma_set_src_index(prtd->ram_link, ping_size, ram_src_cidx);
|
||||
edma_set_dest_index(prtd->ram_link, ping_size, ram_dst_cidx);
|
||||
edma_set_transfer_params(prtd->ram_link, ping_size, 2,
|
||||
runtime->periods, 2, ASYNC);
|
||||
|
||||
/* init master params */
|
||||
@ -406,32 +404,32 @@ static int request_ping_pong(struct snd_pcm_substream *substream,
|
||||
{
|
||||
dma_addr_t asp_src_ping;
|
||||
dma_addr_t asp_dst_ping;
|
||||
int link;
|
||||
int ret;
|
||||
struct davinci_pcm_dma_params *params = prtd->params;
|
||||
|
||||
/* Request ram master channel */
|
||||
link = prtd->ram_channel = edma_alloc_channel(EDMA_CHANNEL_ANY,
|
||||
ret = prtd->ram_channel = edma_alloc_channel(EDMA_CHANNEL_ANY,
|
||||
davinci_pcm_dma_irq, substream,
|
||||
prtd->params->ram_chan_q);
|
||||
if (link < 0)
|
||||
if (ret < 0)
|
||||
goto exit1;
|
||||
|
||||
/* Request ram link channel */
|
||||
link = prtd->ram_link = edma_alloc_slot(
|
||||
ret = prtd->ram_link = edma_alloc_slot(
|
||||
EDMA_CTLR(prtd->ram_channel), EDMA_SLOT_ANY);
|
||||
if (link < 0)
|
||||
if (ret < 0)
|
||||
goto exit2;
|
||||
|
||||
link = prtd->asp_link[1] = edma_alloc_slot(
|
||||
ret = prtd->asp_link[1] = edma_alloc_slot(
|
||||
EDMA_CTLR(prtd->asp_channel), EDMA_SLOT_ANY);
|
||||
if (link < 0)
|
||||
if (ret < 0)
|
||||
goto exit3;
|
||||
|
||||
prtd->ram_link2 = -1;
|
||||
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
||||
link = prtd->ram_link2 = edma_alloc_slot(
|
||||
ret = prtd->ram_link2 = edma_alloc_slot(
|
||||
EDMA_CTLR(prtd->ram_channel), EDMA_SLOT_ANY);
|
||||
if (link < 0)
|
||||
if (ret < 0)
|
||||
goto exit4;
|
||||
}
|
||||
/* circle ping-pong buffers */
|
||||
@ -448,36 +446,33 @@ static int request_ping_pong(struct snd_pcm_substream *substream,
|
||||
asp_dst_ping = iram_dma->addr;
|
||||
}
|
||||
/* ping */
|
||||
link = prtd->asp_link[0];
|
||||
edma_set_src(link, asp_src_ping, INCR, W16BIT);
|
||||
edma_set_dest(link, asp_dst_ping, INCR, W16BIT);
|
||||
edma_set_src_index(link, 0, 0);
|
||||
edma_set_dest_index(link, 0, 0);
|
||||
edma_set_src(prtd->asp_link[0], asp_src_ping, INCR, W16BIT);
|
||||
edma_set_dest(prtd->asp_link[0], asp_dst_ping, INCR, W16BIT);
|
||||
edma_set_src_index(prtd->asp_link[0], 0, 0);
|
||||
edma_set_dest_index(prtd->asp_link[0], 0, 0);
|
||||
|
||||
edma_read_slot(link, &prtd->asp_params);
|
||||
edma_read_slot(prtd->asp_link[0], &prtd->asp_params);
|
||||
prtd->asp_params.opt &= ~(TCCMODE | EDMA_TCC(0x3f) | TCINTEN);
|
||||
prtd->asp_params.opt |= TCCHEN |
|
||||
EDMA_TCC(prtd->ram_channel & 0x3f);
|
||||
edma_write_slot(link, &prtd->asp_params);
|
||||
edma_write_slot(prtd->asp_link[0], &prtd->asp_params);
|
||||
|
||||
/* pong */
|
||||
link = prtd->asp_link[1];
|
||||
edma_set_src(link, asp_src_ping, INCR, W16BIT);
|
||||
edma_set_dest(link, asp_dst_ping, INCR, W16BIT);
|
||||
edma_set_src_index(link, 0, 0);
|
||||
edma_set_dest_index(link, 0, 0);
|
||||
edma_set_src(prtd->asp_link[1], asp_src_ping, INCR, W16BIT);
|
||||
edma_set_dest(prtd->asp_link[1], asp_dst_ping, INCR, W16BIT);
|
||||
edma_set_src_index(prtd->asp_link[1], 0, 0);
|
||||
edma_set_dest_index(prtd->asp_link[1], 0, 0);
|
||||
|
||||
edma_read_slot(link, &prtd->asp_params);
|
||||
edma_read_slot(prtd->asp_link[1], &prtd->asp_params);
|
||||
prtd->asp_params.opt &= ~(TCCMODE | EDMA_TCC(0x3f));
|
||||
/* interrupt after every pong completion */
|
||||
prtd->asp_params.opt |= TCINTEN | TCCHEN |
|
||||
EDMA_TCC(prtd->ram_channel & 0x3f);
|
||||
edma_write_slot(link, &prtd->asp_params);
|
||||
edma_write_slot(prtd->asp_link[1], &prtd->asp_params);
|
||||
|
||||
/* ram */
|
||||
link = prtd->ram_link;
|
||||
edma_set_src(link, iram_dma->addr, INCR, W32BIT);
|
||||
edma_set_dest(link, iram_dma->addr, INCR, W32BIT);
|
||||
edma_set_src(prtd->ram_link, iram_dma->addr, INCR, W32BIT);
|
||||
edma_set_dest(prtd->ram_link, iram_dma->addr, INCR, W32BIT);
|
||||
pr_debug("%s: audio dma channels/slots in use for ram:%u %u %u,"
|
||||
"for asp:%u %u %u\n", __func__,
|
||||
prtd->ram_channel, prtd->ram_link, prtd->ram_link2,
|
||||
@ -494,7 +489,7 @@ exit2:
|
||||
edma_free_channel(prtd->ram_channel);
|
||||
prtd->ram_channel = -1;
|
||||
exit1:
|
||||
return link;
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int davinci_pcm_dma_request(struct snd_pcm_substream *substream)
|
||||
@ -502,22 +497,22 @@ static int davinci_pcm_dma_request(struct snd_pcm_substream *substream)
|
||||
struct snd_dma_buffer *iram_dma;
|
||||
struct davinci_runtime_data *prtd = substream->runtime->private_data;
|
||||
struct davinci_pcm_dma_params *params = prtd->params;
|
||||
int link;
|
||||
int ret;
|
||||
|
||||
if (!params)
|
||||
return -ENODEV;
|
||||
|
||||
/* Request asp master DMA channel */
|
||||
link = prtd->asp_channel = edma_alloc_channel(params->channel,
|
||||
ret = prtd->asp_channel = edma_alloc_channel(params->channel,
|
||||
davinci_pcm_dma_irq, substream,
|
||||
prtd->params->asp_chan_q);
|
||||
if (link < 0)
|
||||
if (ret < 0)
|
||||
goto exit1;
|
||||
|
||||
/* Request asp link channels */
|
||||
link = prtd->asp_link[0] = edma_alloc_slot(
|
||||
ret = prtd->asp_link[0] = edma_alloc_slot(
|
||||
EDMA_CTLR(prtd->asp_channel), EDMA_SLOT_ANY);
|
||||
if (link < 0)
|
||||
if (ret < 0)
|
||||
goto exit2;
|
||||
|
||||
iram_dma = (struct snd_dma_buffer *)substream->dma_buffer.private_data;
|
||||
@ -537,17 +532,17 @@ static int davinci_pcm_dma_request(struct snd_pcm_substream *substream)
|
||||
* the buffer and its length (ccnt) ... use it as a template
|
||||
* so davinci_pcm_enqueue_dma() takes less time in IRQ.
|
||||
*/
|
||||
edma_read_slot(link, &prtd->asp_params);
|
||||
edma_read_slot(prtd->asp_link[0], &prtd->asp_params);
|
||||
prtd->asp_params.opt |= TCINTEN |
|
||||
EDMA_TCC(EDMA_CHAN_SLOT(prtd->asp_channel));
|
||||
prtd->asp_params.link_bcntrld = EDMA_CHAN_SLOT(link) << 5;
|
||||
edma_write_slot(link, &prtd->asp_params);
|
||||
prtd->asp_params.link_bcntrld = EDMA_CHAN_SLOT(prtd->asp_link[0]) << 5;
|
||||
edma_write_slot(prtd->asp_link[0], &prtd->asp_params);
|
||||
return 0;
|
||||
exit2:
|
||||
edma_free_channel(prtd->asp_channel);
|
||||
prtd->asp_channel = -1;
|
||||
exit1:
|
||||
return link;
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int davinci_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
|
||||
|
||||
Reference in New Issue
Block a user