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dma: dw-dma: dont use hard coded transfer size. 

Use transfer size in SG config structure instead of hard coded values.

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
This commit is contained in:
Liam Girdwood 2017-11-17 15:50:49 +00:00
parent c3a01f209b
commit d78ff93a78
1 changed files with 30 additions and 2 deletions
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32
src/drivers/dw-dma.c
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@ -488,8 +488,36 @@ static int dw_dma_set_config(struct dma *dma, int channel,
sg_elem = container_of(plist, struct dma_sg_elem, list);
/* write CTL_LOn for each lli */
lli_desc->ctrl_lo |= DW_CTLL_SRC_WIDTH(2); /* config the src tr width */
lli_desc->ctrl_lo |= DW_CTLL_DST_WIDTH(2); /* config the dest tr width */
switch (config->src_width) {
case 2:
/* config the src tr width for 16 bit samples */
lli_desc->ctrl_lo |= DW_CTLL_SRC_WIDTH(1);
break;
case 4:
/* config the src tr width for 24, 32 bit samples */
lli_desc->ctrl_lo |= DW_CTLL_SRC_WIDTH(2);
break;
default:
trace_dma_error("eD2");
ret = -EINVAL;
goto out;
}
switch (config->dest_width) {
case 2:
/* config the dest tr width for 16 bit samples */
lli_desc->ctrl_lo |= DW_CTLL_DST_WIDTH(1);
break;
case 4:
/* config the dest tr width for 24, 32 bit samples */
lli_desc->ctrl_lo |= DW_CTLL_DST_WIDTH(2);
break;
default:
trace_dma_error("eD3");
ret = -EINVAL;
goto out;
}
lli_desc->ctrl_lo |= DW_CTLL_SRC_MSIZE(3); /* config the src msize length 2^2 */
lli_desc->ctrl_lo |= DW_CTLL_DST_MSIZE(3); /* config the dest msize length 2^2 */
lli_desc->ctrl_lo |= DW_CTLL_INT_EN; /* enable interrupt */