Commit 6584cb88 authored by Sascha Hauer's avatar Sascha Hauer

ARM i.MX dma: Fix burstsize settings

dmaengine expects the maxburst parameter in words, not bytes.
The imxdma driver and its users do this wrong. Fix this.

As a side note the imx-pcm-dma-mx2 driver was 'fixed' to work
with imx-dma. This broke the driver with imx-sdma support which
correctly takes the maxburst parameter in words. This patch
puts the sdma based sound back to work.
Signed-off-by: default avatarSascha Hauer <s.hauer@pengutronix.de>
parent 9d732424
......@@ -135,7 +135,8 @@ static int imxdma_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
if (ret)
return ret;
imx_dma_config_burstlen(imxdmac->imxdma_channel, imxdmac->watermark_level);
imx_dma_config_burstlen(imxdmac->imxdma_channel,
imxdmac->watermark_level * imxdmac->word_size);
return 0;
default:
......
......@@ -715,13 +715,13 @@ static void mxcmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
int burstlen, ret;
/*
* use burstlen of 64 in 4 bit mode (--> reg value 0)
* use burstlen of 16 in 1 bit mode (--> reg value 16)
* use burstlen of 64 (16 words) in 4 bit mode (--> reg value 0)
* use burstlen of 16 (4 words) in 1 bit mode (--> reg value 16)
*/
if (ios->bus_width == MMC_BUS_WIDTH_4)
burstlen = 64;
else
burstlen = 16;
else
burstlen = 4;
if (mxcmci_use_dma(host) && burstlen != host->burstlen) {
host->burstlen = burstlen;
......
......@@ -110,12 +110,12 @@ static int imx_ssi_dma_alloc(struct snd_pcm_substream *substream,
slave_config.direction = DMA_TO_DEVICE;
slave_config.dst_addr = dma_params->dma_addr;
slave_config.dst_addr_width = buswidth;
slave_config.dst_maxburst = dma_params->burstsize * buswidth;
slave_config.dst_maxburst = dma_params->burstsize;
} else {
slave_config.direction = DMA_FROM_DEVICE;
slave_config.src_addr = dma_params->dma_addr;
slave_config.src_addr_width = buswidth;
slave_config.src_maxburst = dma_params->burstsize * buswidth;
slave_config.src_maxburst = dma_params->burstsize;
}
ret = dmaengine_slave_config(iprtd->dma_chan, &slave_config);
......
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