OrgACRN
/
sof
mirror of https://github.com/thesofproject/sof.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

host: reload host DMA less frequently 

This should reduce DRAM access frequency and allow deeper power
saving modes, particularly when using Deep Buffer PCMs.

Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
This commit is contained in:
Guennadi Liakhovetski 2023-03-20 18:02:57 +01:00 committed by Ranjani Sridharan
parent d9771be5b8
commit e1831cb07a
2 changed files with 19 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
src/audio/host-zephyr.c
View File

@ -445,8 +445,9 @@ static uint32_t host_get_copy_bytes_normal(struct host_data *hd, struct comp_dev
*/
static int host_copy_normal(struct host_data *hd, struct comp_dev *dev)
{
struct comp_buffer __sparse_cache *buffer_c;
uint32_t copy_bytes;
int ret;
int ret = 0;
comp_dbg(dev, "host_copy_normal()");
@ -460,9 +461,20 @@ static int host_copy_normal(struct host_data *hd, struct comp_dev *dev)
};
notifier_event(hd->chan, NOTIFIER_ID_DMA_COPY,
NOTIFIER_TARGET_CORE_LOCAL, &next, sizeof(next));
ret = dma_reload(hd->chan->dma->z_dev, hd->chan->index, 0, 0, copy_bytes);
if (ret < 0)
comp_err(dev, "host_copy_normal(): dma_copy() failed, ret = %u", ret);
hd->partial_size += copy_bytes;
buffer_c = buffer_acquire(hd->dma_buffer);
/* Reload DMA when half of the buffer has been used */
if (hd->partial_size >= buffer_c->stream.size >> 1) {
ret = dma_reload(hd->chan->dma->z_dev, hd->chan->index, 0, 0, hd->partial_size);
if (ret < 0)
comp_err(dev, "host_copy_normal(): dma_copy() failed, ret = %u", ret);
hd->partial_size = 0;
}
buffer_release(buffer_c);
return ret;
}
@ -523,6 +535,7 @@ int host_zephyr_trigger(struct host_data *hd, struct comp_dev *dev, int cmd)
switch (cmd) {
case COMP_TRIGGER_START:
hd->partial_size = 0;
ret = dma_start(hd->chan->dma->z_dev, hd->chan->index);
if (ret < 0)
comp_err(dev, "host_trigger(): dma_start() failed, ret = %u",

2
src/include/sof/audio/host_copier.h
View File

@ -71,6 +71,8 @@ struct host_data {
struct hc_buf host;
struct hc_buf local;
size_t partial_size; /**< add up DMA updates for deep buffer */
/* pointers set during params to host or local above */
struct hc_buf *source;
struct hc_buf *sink;