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audio: dai-zephyr: convert DMA src/dst addresses to host-relative addresses 

The DMAC has the same view of the address space as the HOST.
As such, the source and destination addresses need to be converted
to HOST-relative addresses before attempting to perform a DMA
transfer. This is only relevant for platforms for which the DSP
and HOST have different views of the address space (e.g: i.MX8ULP).

Also, if a platform doesn't define the `local_to_host` macro
(used for converting DSP local address to HOST-relative address)
we assume that the HOST and the DSP have the same view of the
address space. As such, we also add a definition of `local_to_host`
which will just return the passed address.

Signed-off-by: Laurentiu Mihalcea <laurentiu.mihalcea@nxp.com>
This commit is contained in:
Laurentiu Mihalcea 2024-03-14 16:43:24 +02:00 committed by Daniel Baluta
parent 12ad82a756
commit fc48fbd1b3
1 changed files with 16 additions and 2 deletions
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18
src/audio/dai-zephyr.c
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@ -41,6 +41,14 @@
#include <zephyr/device.h>
#include <zephyr/drivers/dai.h>
/* note: if this macro is not defined
* then that means the HOST and the DSP
* have the same view of the address space.
*/
#ifndef local_to_host
#define local_to_host(addr) (addr)
#endif /* local_to_host */
static const struct comp_driver comp_dai;
LOG_MODULE_REGISTER(dai_comp, CONFIG_SOF_LOG_LEVEL);
@ -751,12 +759,18 @@ static int dai_set_dma_config(struct dai_data *dd, struct comp_dev *dev)
for (i = 0; i < dma_cfg->block_count; i++) {
dma_block_cfg->dest_scatter_en = config->scatter;
dma_block_cfg->block_size = config->elem_array.elems[i].size;
dma_block_cfg->source_address = config->elem_array.elems[i].src;
dma_block_cfg->dest_address = config->elem_array.elems[i].dest;
if (dev->direction == SOF_IPC_STREAM_PLAYBACK) {
dma_block_cfg->source_address =
local_to_host(config->elem_array.elems[i].src);
dma_block_cfg->dest_address =
config->elem_array.elems[i].dest;
dma_block_cfg->source_addr_adj = DMA_ADDR_ADJ_DECREMENT;
dma_block_cfg->dest_addr_adj = DMA_ADDR_ADJ_INCREMENT;
} else {
dma_block_cfg->source_address =
config->elem_array.elems[i].src;
dma_block_cfg->dest_address =
local_to_host(config->elem_array.elems[i].dest);
dma_block_cfg->source_addr_adj = DMA_ADDR_ADJ_INCREMENT;
dma_block_cfg->dest_addr_adj = DMA_ADDR_ADJ_DECREMENT;
}