Commit ad036bde authored by Jeeja KP's avatar Jeeja KP Committed by Mark Brown
Browse files

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: default avatarJeeja KP <jeeja.kp@intel.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent bb704a73

sound/soc/intel/skylake/skl-pcm.c

+74 −0
Original line number Diff line number Diff line
@@ -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)

{

sound/soc/intel/skylake/skl-topology.h

+4 −0
Original line number Diff line number Diff line
@@ -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