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ASoC: Intel: Skylake: Add helper function to setup host/link dma 

This patch adds helper function to configure the host/link DMA when
the DMA is in decoupled mode.
Next patch adds the usage of this helper routines for configuring
DMA in Mixer event handler.

Signed-off-by: Jeeja KP <jeeja.kp@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Jeeja KP 2016-12-08 13:41:13 +05:30 committed by Mark Brown
parent bb704a737c
commit ad036bdee5
2 changed files with 78 additions and 0 deletions
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74
sound/soc/intel/skylake/skl-pcm.c
View File

@ -137,6 +137,80 @@ static void skl_set_suspend_active(struct snd_pcm_substream *substream,
skl->supend_active--;
}
int skl_pcm_host_dma_prepare(struct device *dev, struct skl_pipe_params *params)
{
struct hdac_ext_bus *ebus = dev_get_drvdata(dev);
struct hdac_bus *bus = ebus_to_hbus(ebus);
unsigned int format_val;
struct hdac_stream *hstream;
struct hdac_ext_stream *stream;
int err;
hstream = snd_hdac_get_stream(bus, params->stream,
params->host_dma_id + 1);
if (!hstream)
return -EINVAL;
stream = stream_to_hdac_ext_stream(hstream);
snd_hdac_ext_stream_decouple(ebus, stream, true);
format_val = snd_hdac_calc_stream_format(params->s_freq,
params->ch, params->format, 32, 0);
dev_dbg(dev, "format_val=%d, rate=%d, ch=%d, format=%d\n",
format_val, params->s_freq, params->ch, params->format);
snd_hdac_stream_reset(hdac_stream(stream));
err = snd_hdac_stream_set_params(hdac_stream(stream), format_val);
if (err < 0)
return err;
err = snd_hdac_stream_setup(hdac_stream(stream));
if (err < 0)
return err;
hdac_stream(stream)->prepared = 1;
return 0;
}
int skl_pcm_link_dma_prepare(struct device *dev, struct skl_pipe_params *params)
{
struct hdac_ext_bus *ebus = dev_get_drvdata(dev);
struct hdac_bus *bus = ebus_to_hbus(ebus);
unsigned int format_val;
struct hdac_stream *hstream;
struct hdac_ext_stream *stream;
struct hdac_ext_link *link;
hstream = snd_hdac_get_stream(bus, params->stream,
params->link_dma_id + 1);
if (!hstream)
return -EINVAL;
stream = stream_to_hdac_ext_stream(hstream);
snd_hdac_ext_stream_decouple(ebus, stream, true);
format_val = snd_hdac_calc_stream_format(params->s_freq,
params->ch, params->format, 24, 0);
dev_dbg(dev, "format_val=%d, rate=%d, ch=%d, format=%d\n",
format_val, params->s_freq, params->ch, params->format);
snd_hdac_ext_link_stream_reset(stream);
snd_hdac_ext_link_stream_setup(stream, format_val);
list_for_each_entry(link, &ebus->hlink_list, list) {
if (link->index == params->link_index)
snd_hdac_ext_link_set_stream_id(link,
hstream->stream_tag);
}
stream->link_prepared = 1;
return 0;
}
static int skl_pcm_open(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{

4
sound/soc/intel/skylake/skl-topology.h
View File

@ -385,4 +385,8 @@ int skl_get_module_params(struct skl_sst *ctx, u32 *params, int size,
struct skl_module_cfg *skl_tplg_be_get_cpr_module(struct snd_soc_dai *dai,
int stream);
enum skl_bitdepth skl_get_bit_depth(int params);
int skl_pcm_host_dma_prepare(struct device *dev,
struct skl_pipe_params *params);
int skl_pcm_link_dma_prepare(struct device *dev,
struct skl_pipe_params *params);
#endif