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authorFabio Baltieri <fabio.baltieri@linaro.org>2013-06-12 09:57:59 +0200
committerMark Brown <broonie@linaro.org>2013-06-12 17:02:52 +0100
commiteef6473ff3ce2383febebd2e799beceaece9adda (patch)
tree19902a8739be9348659665071d72f15c05cf3842 /sound/soc/ux500
parent20413113ffdd8c56b2a985ca8195d9c91e9c602b (diff)
downloadlinux-eef6473ff3ce2383febebd2e799beceaece9adda.tar.bz2
ASoC: ux500: Add DMA slave config prepare routine
Implement a DMA slave config prepare routine, as until now the MSP driver depended on the DMA controller completing the channel configuration on its own, but this is not the case anymore since the recent DMA driver updates. Signed-off-by: Fabio Baltieri <fabio.baltieri@linaro.org> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'sound/soc/ux500')
-rw-r--r--sound/soc/ux500/ux500_pcm.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/sound/soc/ux500/ux500_pcm.c b/sound/soc/ux500/ux500_pcm.c
index b6e5ae277299..5f01c19776bf 100644
--- a/sound/soc/ux500/ux500_pcm.c
+++ b/sound/soc/ux500/ux500_pcm.c
@@ -103,10 +103,40 @@ static struct dma_chan *ux500_pcm_request_chan(struct snd_soc_pcm_runtime *rtd,
return snd_dmaengine_pcm_request_channel(stedma40_filter, dma_cfg);
}
+static int ux500_pcm_prepare_slave_config(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct dma_slave_config *slave_config)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct ux500_msp_dma_params *dma_params;
+ struct stedma40_chan_cfg *dma_cfg;
+ int ret;
+
+ dma_params = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
+ dma_cfg = dma_params->dma_cfg;
+
+ ret = snd_hwparams_to_dma_slave_config(substream, params, slave_config);
+ if (ret)
+ return ret;
+
+ slave_config->dst_maxburst = 4;
+ slave_config->dst_addr_width = dma_cfg->dst_info.data_width;
+ slave_config->src_maxburst = 4;
+ slave_config->src_addr_width = dma_cfg->src_info.data_width;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ slave_config->dst_addr = dma_params->tx_rx_addr;
+ else
+ slave_config->src_addr = dma_params->tx_rx_addr;
+
+ return 0;
+}
+
static const struct snd_dmaengine_pcm_config ux500_dmaengine_pcm_config = {
.pcm_hardware = &ux500_pcm_hw,
.compat_request_channel = ux500_pcm_request_chan,
.prealloc_buffer_size = 128 * 1024,
+ .prepare_slave_config = ux500_pcm_prepare_slave_config,
};
int ux500_pcm_register_platform(struct platform_device *pdev)