linux/sound/soc/intel/skylake/skl-topology.c

/*
 *  skl-topology.c - Implements Platform component ALSA controls/widget
 *  handlers.
 *
 *  Copyright (C) 2014-2015 Intel Corp
 *  Author: Jeeja KP <jeeja.kp@intel.com>
 *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as version 2, as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 */

#include <linux/slab.h>
#include <linux/types.h>
#include <linux/firmware.h>
#include <sound/soc.h>
#include <sound/soc-topology.h>
#include "skl-sst-dsp.h"
#include "skl-sst-ipc.h"
#include "skl-topology.h"
#include "skl.h"
#include "skl-tplg-interface.h"

#define SKL_CH_FIXUP_MASK		(1 << 0)
#define SKL_RATE_FIXUP_MASK		(1 << 1)
#define SKL_FMT_FIXUP_MASK		(1 << 2)

/*
 * SKL DSP driver modelling uses only few DAPM widgets so for rest we will
 * ignore. This helpers checks if the SKL driver handles this widget type
 */
static int is_skl_dsp_widget_type(struct snd_soc_dapm_widget *w)
{
	switch (w->id) {
	case snd_soc_dapm_dai_link:
	case snd_soc_dapm_dai_in:
	case snd_soc_dapm_aif_in:
	case snd_soc_dapm_aif_out:
	case snd_soc_dapm_dai_out:
	case snd_soc_dapm_switch:
		return false;
	default:
		return true;
	}
}

/*
 * Each pipelines needs memory to be allocated. Check if we have free memory
 * from available pool. Then only add this to pool
 * This is freed when pipe is deleted
 * Note: DSP does actual memory management we only keep track for complete
 * pool
 */
static bool skl_tplg_alloc_pipe_mem(struct skl *skl,
				struct skl_module_cfg *mconfig)
{
	struct skl_sst *ctx = skl->skl_sst;

	if (skl->resource.mem + mconfig->pipe->memory_pages >
				skl->resource.max_mem) {
		dev_err(ctx->dev,
				"%s: module_id %d instance %d\n", __func__,
				mconfig->id.module_id,
				mconfig->id.instance_id);
		dev_err(ctx->dev,
				"exceeds ppl memory available %d mem %d\n",
				skl->resource.max_mem, skl->resource.mem);
		return false;
	}

	skl->resource.mem += mconfig->pipe->memory_pages;
	return true;
}

/*
 * Pipeline needs needs DSP CPU resources for computation, this is
 * quantified in MCPS (Million Clocks Per Second) required for module/pipe
 *
 * Each pipelines needs mcps to be allocated. Check if we have mcps for this
 * pipe. This adds the mcps to driver counter
 * This is removed on pipeline delete
 */
static bool skl_tplg_alloc_pipe_mcps(struct skl *skl,
				struct skl_module_cfg *mconfig)
{
	struct skl_sst *ctx = skl->skl_sst;

	if (skl->resource.mcps + mconfig->mcps > skl->resource.max_mcps) {
		dev_err(ctx->dev,
			"%s: module_id %d instance %d\n", __func__,
			mconfig->id.module_id, mconfig->id.instance_id);
		dev_err(ctx->dev,
			"exceeds ppl memory available %d > mem %d\n",
			skl->resource.max_mcps, skl->resource.mcps);
		return false;
	}

	skl->resource.mcps += mconfig->mcps;
	return true;
}

/*
 * Free the mcps when tearing down
 */
static void
skl_tplg_free_pipe_mcps(struct skl *skl, struct skl_module_cfg *mconfig)
{
	skl->resource.mcps -= mconfig->mcps;
}

/*
 * Free the memory when tearing down
 */
static void
skl_tplg_free_pipe_mem(struct skl *skl, struct skl_module_cfg *mconfig)
{
	skl->resource.mem -= mconfig->pipe->memory_pages;
}


static void skl_dump_mconfig(struct skl_sst *ctx,
					struct skl_module_cfg *mcfg)
{
	dev_dbg(ctx->dev, "Dumping config\n");
	dev_dbg(ctx->dev, "Input Format:\n");
	dev_dbg(ctx->dev, "channels = %d\n", mcfg->in_fmt.channels);
	dev_dbg(ctx->dev, "s_freq = %d\n", mcfg->in_fmt.s_freq);
	dev_dbg(ctx->dev, "ch_cfg = %d\n", mcfg->in_fmt.ch_cfg);
	dev_dbg(ctx->dev, "valid bit depth = %d\n",
			mcfg->in_fmt.valid_bit_depth);
	dev_dbg(ctx->dev, "Output Format:\n");
	dev_dbg(ctx->dev, "channels = %d\n", mcfg->out_fmt.channels);
	dev_dbg(ctx->dev, "s_freq = %d\n", mcfg->out_fmt.s_freq);
	dev_dbg(ctx->dev, "valid bit depth = %d\n",
			mcfg->out_fmt.valid_bit_depth);
	dev_dbg(ctx->dev, "ch_cfg = %d\n", mcfg->out_fmt.ch_cfg);
}

static void skl_tplg_update_params(struct skl_module_fmt *fmt,
			struct skl_pipe_params *params, int fixup)
{
	if (fixup & SKL_RATE_FIXUP_MASK)
		fmt->s_freq = params->s_freq;
	if (fixup & SKL_CH_FIXUP_MASK)
		fmt->channels = params->ch;
	if (fixup & SKL_FMT_FIXUP_MASK)
		fmt->valid_bit_depth = params->s_fmt;
}

/*
 * A pipeline may have modules which impact the pcm parameters, like SRC,
 * channel converter, format converter.
 * We need to calculate the output params by applying the 'fixup'
 * Topology will tell driver which type of fixup is to be applied by
 * supplying the fixup mask, so based on that we calculate the output
 *
 * Now In FE the pcm hw_params is source/target format. Same is applicable
 * for BE with its hw_params invoked.
 * here based on FE, BE pipeline and direction we calculate the input and
 * outfix and then apply that for a module
 */
static void skl_tplg_update_params_fixup(struct skl_module_cfg *m_cfg,
		struct skl_pipe_params *params, bool is_fe)
{
	int in_fixup, out_fixup;
	struct skl_module_fmt *in_fmt, *out_fmt;

	in_fmt = &m_cfg->in_fmt;
	out_fmt = &m_cfg->out_fmt;

	if (params->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		if (is_fe) {
			in_fixup = m_cfg->params_fixup;
			out_fixup = (~m_cfg->converter) &
					m_cfg->params_fixup;
		} else {
			out_fixup = m_cfg->params_fixup;
			in_fixup = (~m_cfg->converter) &
					m_cfg->params_fixup;
		}
	} else {
		if (is_fe) {
			out_fixup = m_cfg->params_fixup;
			in_fixup = (~m_cfg->converter) &
					m_cfg->params_fixup;
		} else {
			in_fixup = m_cfg->params_fixup;
			out_fixup = (~m_cfg->converter) &
					m_cfg->params_fixup;
		}
	}

	skl_tplg_update_params(in_fmt, params, in_fixup);
	skl_tplg_update_params(out_fmt, params, out_fixup);
}

/*
 * A module needs input and output buffers, which are dependent upon pcm
 * params, so once we have calculate params, we need buffer calculation as
 * well.
 */
static void skl_tplg_update_buffer_size(struct skl_sst *ctx,
				struct skl_module_cfg *mcfg)
{
	int multiplier = 1;

	if (mcfg->m_type == SKL_MODULE_TYPE_SRCINT)
		multiplier = 5;

	mcfg->ibs = (mcfg->in_fmt.s_freq / 1000) *
				(mcfg->in_fmt.channels) *
				(mcfg->in_fmt.bit_depth >> 3) *
				multiplier;

	mcfg->obs = (mcfg->out_fmt.s_freq / 1000) *
				(mcfg->out_fmt.channels) *
				(mcfg->out_fmt.bit_depth >> 3) *
				multiplier;
}

static void skl_tplg_update_module_params(struct snd_soc_dapm_widget *w,
							struct skl_sst *ctx)
{
	struct skl_module_cfg *m_cfg = w->priv;
	struct skl_pipe_params *params = m_cfg->pipe->p_params;
	int p_conn_type = m_cfg->pipe->conn_type;
	bool is_fe;

	if (!m_cfg->params_fixup)
		return;

	dev_dbg(ctx->dev, "Mconfig for widget=%s BEFORE updation\n",
				w->name);

	skl_dump_mconfig(ctx, m_cfg);

	if (p_conn_type == SKL_PIPE_CONN_TYPE_FE)
		is_fe = true;
	else
		is_fe = false;

	skl_tplg_update_params_fixup(m_cfg, params, is_fe);
	skl_tplg_update_buffer_size(ctx, m_cfg);

	dev_dbg(ctx->dev, "Mconfig for widget=%s AFTER updation\n",
				w->name);

	skl_dump_mconfig(ctx, m_cfg);
}

/*
 * A pipe can have multiple modules, each of them will be a DAPM widget as
 * well. While managing a pipeline we need to get the list of all the
 * widgets in a pipelines, so this helper - skl_tplg_get_pipe_widget() helps
 * to get the SKL type widgets in that pipeline
 */
static int skl_tplg_alloc_pipe_widget(struct device *dev,
	struct snd_soc_dapm_widget *w, struct skl_pipe *pipe)
{
	struct skl_module_cfg *src_module = NULL;
	struct snd_soc_dapm_path *p = NULL;
	struct skl_pipe_module *p_module = NULL;

	p_module = devm_kzalloc(dev, sizeof(*p_module), GFP_KERNEL);
	if (!p_module)
		return -ENOMEM;

	p_module->w = w;
	list_add_tail(&p_module->node, &pipe->w_list);

	snd_soc_dapm_widget_for_each_sink_path(w, p) {
		if ((p->sink->priv == NULL)
				&& (!is_skl_dsp_widget_type(w)))
			continue;

		if ((p->sink->priv != NULL) && p->connect
				&& is_skl_dsp_widget_type(p->sink)) {

			src_module = p->sink->priv;
			if (pipe->ppl_id == src_module->pipe->ppl_id)
				skl_tplg_alloc_pipe_widget(dev,
							p->sink, pipe);
		}
	}
	return 0;
}

/*
 * Inside a pipe instance, we can have various modules. These modules need
 * to instantiated in DSP by invoking INIT_MODULE IPC, which is achieved by
 * skl_init_module() routine, so invoke that for all modules in a pipeline
 */
static int
skl_tplg_init_pipe_modules(struct skl *skl, struct skl_pipe *pipe)
{
	struct skl_pipe_module *w_module;
	struct snd_soc_dapm_widget *w;
	struct skl_module_cfg *mconfig;
	struct skl_sst *ctx = skl->skl_sst;
	int ret = 0;

	list_for_each_entry(w_module, &pipe->w_list, node) {
		w = w_module->w;
		mconfig = w->priv;

		/* check resource available */
		if (!skl_tplg_alloc_pipe_mcps(skl, mconfig))
			return -ENOMEM;

		/*
		 * apply fix/conversion to module params based on
		 * FE/BE params
		 */
		skl_tplg_update_module_params(w, ctx);
		ret = skl_init_module(ctx, mconfig, NULL);
		if (ret < 0)
			return ret;
	}

	return 0;
}

/*
 * Mixer module represents a pipeline. So in the Pre-PMU event of mixer we
 * need create the pipeline. So we do following:
 *   - check the resources
 *   - Create the pipeline
 *   - Initialize the modules in pipeline
 *   - finally bind all modules together
 */
static int skl_tplg_mixer_dapm_pre_pmu_event(struct snd_soc_dapm_widget *w,
							struct skl *skl)
{
	int ret;
	struct skl_module_cfg *mconfig = w->priv;
	struct skl_pipe_module *w_module;
	struct skl_pipe *s_pipe = mconfig->pipe;
	struct skl_module_cfg *src_module = NULL, *dst_module;
	struct skl_sst *ctx = skl->skl_sst;

	/* check resource available */
	if (!skl_tplg_alloc_pipe_mcps(skl, mconfig))
		return -EBUSY;

	if (!skl_tplg_alloc_pipe_mem(skl, mconfig))
		return -ENOMEM;

	/*
	 * Create a list of modules for pipe.
	 * This list contains modules from source to sink
	 */
	ret = skl_create_pipeline(ctx, mconfig->pipe);
	if (ret < 0)
		return ret;

	/*
	 * we create a w_list of all widgets in that pipe. This list is not
	 * freed on PMD event as widgets within a pipe are static. This
	 * saves us cycles to get widgets in pipe every time.
	 *
	 * So if we have already initialized all the widgets of a pipeline
	 * we skip, so check for list_empty and create the list if empty
	 */
	if (list_empty(&s_pipe->w_list)) {
		ret = skl_tplg_alloc_pipe_widget(ctx->dev, w, s_pipe);
		if (ret < 0)
			return ret;
	}

	/* Init all pipe modules from source to sink */
	ret = skl_tplg_init_pipe_modules(skl, s_pipe);
	if (ret < 0)
		return ret;

	/* Bind modules from source to sink */
	list_for_each_entry(w_module, &s_pipe->w_list, node) {
		dst_module = w_module->w->priv;

		if (src_module == NULL) {
			src_module = dst_module;
			continue;
		}

		ret = skl_bind_modules(ctx, src_module, dst_module);
		if (ret < 0)
			return ret;

		src_module = dst_module;
	}

	return 0;
}

/*
 * A PGA represents a module in a pipeline. So in the Pre-PMU event of PGA
 * we need to do following:
 *   - Bind to sink pipeline
 *      Since the sink pipes can be running and we don't get mixer event on
 *      connect for already running mixer, we need to find the sink pipes
 *      here and bind to them. This way dynamic connect works.
 *   - Start sink pipeline, if not running
 *   - Then run current pipe
 */
static int skl_tplg_pga_dapm_pre_pmu_event(struct snd_soc_dapm_widget *w,
							struct skl *skl)
{
	struct snd_soc_dapm_path *p;
	struct skl_dapm_path_list *path_list;
	struct snd_soc_dapm_widget *source, *sink;
	struct skl_module_cfg *src_mconfig, *sink_mconfig;
	struct skl_sst *ctx = skl->skl_sst;
	int ret = 0;

	source = w;
	src_mconfig = source->priv;

	/*
	 * find which sink it is connected to, bind with the sink,
	 * if sink is not started, start sink pipe first, then start
	 * this pipe
	 */
	snd_soc_dapm_widget_for_each_source_path(w, p) {
		if (!p->connect)
			continue;

		dev_dbg(ctx->dev, "%s: src widget=%s\n", __func__, w->name);
		dev_dbg(ctx->dev, "%s: sink widget=%s\n", __func__, p->sink->name);

		/*
		 * here we will check widgets in sink pipelines, so that
		 * can be any widgets type and we are only interested if
		 * they are ones used for SKL so check that first
		 */
		if ((p->sink->priv != NULL) &&
					is_skl_dsp_widget_type(p->sink)) {

			sink = p->sink;
			src_mconfig = source->priv;
			sink_mconfig = sink->priv;

			/* Bind source to sink, mixin is always source */
			ret = skl_bind_modules(ctx, src_mconfig, sink_mconfig);
			if (ret)
				return ret;

			/* Start sinks pipe first */
			if (sink_mconfig->pipe->state != SKL_PIPE_STARTED) {
				ret = skl_run_pipe(ctx, sink_mconfig->pipe);
				if (ret)
					return ret;
			}

			path_list = kzalloc(
					sizeof(struct skl_dapm_path_list),
					GFP_KERNEL);
			if (path_list == NULL)
				return -ENOMEM;

			/* Add connected path to one global list */
			path_list->dapm_path = p;
			list_add_tail(&path_list->node, &skl->dapm_path_list);
			break;
		}
	}

	/* Start source pipe last after starting all sinks */
	ret = skl_run_pipe(ctx, src_mconfig->pipe);
	if (ret)
		return ret;

	return 0;
}

/*
 * in the Post-PMU event of mixer we need to do following:
 *   - Check if this pipe is running
 *   - if not, then
 *	- bind this pipeline to its source pipeline
 *	  if source pipe is already running, this means it is a dynamic
 *	  connection and we need to bind only to that pipe
 *	- start this pipeline
 */
static int skl_tplg_mixer_dapm_post_pmu_event(struct snd_soc_dapm_widget *w,
							struct skl *skl)
{
	int ret = 0;
	struct snd_soc_dapm_path *p;
	struct snd_soc_dapm_widget *source, *sink;
	struct skl_module_cfg *src_mconfig, *sink_mconfig;
	struct skl_sst *ctx = skl->skl_sst;
	int src_pipe_started = 0;

	sink = w;
	sink_mconfig = sink->priv;

	/*
	 * If source pipe is already started, that means source is driving
	 * one more sink before this sink got connected, Since source is
	 * started, bind this sink to source and start this pipe.
	 */
	snd_soc_dapm_widget_for_each_sink_path(w, p) {
		if (!p->connect)
			continue;

		dev_dbg(ctx->dev, "sink widget=%s\n", w->name);
		dev_dbg(ctx->dev, "src widget=%s\n", p->source->name);

		/*
		 * here we will check widgets in sink pipelines, so that
		 * can be any widgets type and we are only interested if
		 * they are ones used for SKL so check that first
		 */
		if ((p->source->priv != NULL) &&
					is_skl_dsp_widget_type(p->source)) {
			source = p->source;
			src_mconfig = source->priv;
			sink_mconfig = sink->priv;
			src_pipe_started = 1;

			/*
			 * check pipe state, then no need to bind or start
			 * the pipe
			 */
			if (src_mconfig->pipe->state != SKL_PIPE_STARTED)
				src_pipe_started = 0;
		}
	}

	if (src_pipe_started) {
		ret = skl_bind_modules(ctx, src_mconfig, sink_mconfig);
		if (ret)
			return ret;

		ret = skl_run_pipe(ctx, sink_mconfig->pipe);
	}

	return ret;
}

/*
 * in the Pre-PMD event of mixer we need to do following:
 *   - Stop the pipe
 *   - find the source connections and remove that from dapm_path_list
 *   - unbind with source pipelines if still connected
 */
static int skl_tplg_mixer_dapm_pre_pmd_event(struct snd_soc_dapm_widget *w,
							struct skl *skl)
{
	struct snd_soc_dapm_widget *source, *sink;
	struct skl_module_cfg *src_mconfig, *sink_mconfig;
	int ret = 0, path_found = 0;
	struct skl_dapm_path_list *path_list, *tmp_list;
	struct skl_sst *ctx = skl->skl_sst;

	sink = w;
	sink_mconfig = sink->priv;

	/* Stop the pipe */
	ret = skl_stop_pipe(ctx, sink_mconfig->pipe);
	if (ret)
		return ret;

	/*
	 * This list, dapm_path_list handling here does not need any locks
	 * as we are under dapm lock while handling widget events.
	 * List can be manipulated safely only under dapm widgets handler
	 * routines
	 */
	list_for_each_entry_safe(path_list, tmp_list,
				&skl->dapm_path_list, node) {
		if (path_list->dapm_path->sink == sink) {
			dev_dbg(ctx->dev, "Path found = %s\n",
					path_list->dapm_path->name);
			source = path_list->dapm_path->source;
			src_mconfig = source->priv;
			path_found = 1;

			list_del(&path_list->node);
			kfree(path_list);
			break;
		}
	}

	/*
	 * If path_found == 1, that means pmd for source pipe has
	 * not occurred, source is connected to some other sink.
	 * so its responsibility of sink to unbind itself from source.
	 */
	if (path_found) {
		ret = skl_stop_pipe(ctx, src_mconfig->pipe);
		if (ret < 0)
			return ret;

		ret = skl_unbind_modules(ctx, src_mconfig, sink_mconfig);
	}

	return ret;
}

/*
 * in the Post-PMD event of mixer we need to do following:
 *   - Free the mcps used
 *   - Free the mem used
 *   - Unbind the modules within the pipeline
 *   - Delete the pipeline (modules are not required to be explicitly
 *     deleted, pipeline delete is enough here
 */
static int skl_tplg_mixer_dapm_post_pmd_event(struct snd_soc_dapm_widget *w,
							struct skl *skl)
{
	struct skl_module_cfg *mconfig = w->priv;
	struct skl_pipe_module *w_module;
	struct skl_module_cfg *src_module = NULL, *dst_module;
	struct skl_sst *ctx = skl->skl_sst;
	struct skl_pipe *s_pipe = mconfig->pipe;
	int ret = 0;

	skl_tplg_free_pipe_mcps(skl, mconfig);

	list_for_each_entry(w_module, &s_pipe->w_list, node) {
		dst_module = w_module->w->priv;

		if (src_module == NULL) {
			src_module = dst_module;
			continue;
		}

		ret = skl_unbind_modules(ctx, src_module, dst_module);
		if (ret < 0)
			return ret;

		src_module = dst_module;
	}

	ret = skl_delete_pipe(ctx, mconfig->pipe);
	skl_tplg_free_pipe_mem(skl, mconfig);

	return ret;
}

/*
 * in the Post-PMD event of PGA we need to do following:
 *   - Free the mcps used
 *   - Stop the pipeline
 *   - In source pipe is connected, unbind with source pipelines
 */
static int skl_tplg_pga_dapm_post_pmd_event(struct snd_soc_dapm_widget *w,
								struct skl *skl)
{
	struct snd_soc_dapm_widget *source, *sink;
	struct skl_module_cfg *src_mconfig, *sink_mconfig;
	int ret = 0, path_found = 0;
	struct skl_dapm_path_list *path_list, *tmp_path_list;
	struct skl_sst *ctx = skl->skl_sst;

	source = w;
	src_mconfig = source->priv;

	skl_tplg_free_pipe_mcps(skl, src_mconfig);
	/* Stop the pipe since this is a mixin module */
	ret = skl_stop_pipe(ctx, src_mconfig->pipe);
	if (ret)
		return ret;

	list_for_each_entry_safe(path_list, tmp_path_list, &skl->dapm_path_list, node) {
		if (path_list->dapm_path->source == source) {
			dev_dbg(ctx->dev, "Path found = %s\n",
					path_list->dapm_path->name);
			sink = path_list->dapm_path->sink;
			sink_mconfig = sink->priv;
			path_found = 1;

			list_del(&path_list->node);
			kfree(path_list);
			break;
		}
	}

	/*
	 * This is a connector and if path is found that means
	 * unbind between source and sink has not happened yet
	 */
	if (path_found) {
		ret = skl_stop_pipe(ctx, src_mconfig->pipe);
		if (ret < 0)
			return ret;

		ret = skl_unbind_modules(ctx, src_mconfig, sink_mconfig);
	}

	return ret;
}

/*
 * In modelling, we assume there will be ONLY one mixer in a pipeline.  If
 * mixer is not required then it is treated as static mixer aka vmixer with
 * a hard path to source module
 * So we don't need to check if source is started or not as hard path puts
 * dependency on each other
 */
static int skl_tplg_vmixer_event(struct snd_soc_dapm_widget *w,
				struct snd_kcontrol *k, int event)
{
	struct snd_soc_dapm_context *dapm = w->dapm;
	struct skl *skl = get_skl_ctx(dapm->dev);

	switch (event) {
	case SND_SOC_DAPM_PRE_PMU:
		return skl_tplg_mixer_dapm_pre_pmu_event(w, skl);

	case SND_SOC_DAPM_POST_PMD:
		return skl_tplg_mixer_dapm_post_pmd_event(w, skl);
	}

	return 0;
}

/*
 * In modelling, we assume there will be ONLY one mixer in a pipeline. If a
 * second one is required that is created as another pipe entity.
 * The mixer is responsible for pipe management and represent a pipeline
 * instance
 */
static int skl_tplg_mixer_event(struct snd_soc_dapm_widget *w,
				struct snd_kcontrol *k, int event)
{
	struct snd_soc_dapm_context *dapm = w->dapm;
	struct skl *skl = get_skl_ctx(dapm->dev);

	switch (event) {
	case SND_SOC_DAPM_PRE_PMU:
		return skl_tplg_mixer_dapm_pre_pmu_event(w, skl);

	case SND_SOC_DAPM_POST_PMU:
		return skl_tplg_mixer_dapm_post_pmu_event(w, skl);

	case SND_SOC_DAPM_PRE_PMD:
		return skl_tplg_mixer_dapm_pre_pmd_event(w, skl);

	case SND_SOC_DAPM_POST_PMD:
		return skl_tplg_mixer_dapm_post_pmd_event(w, skl);
	}

	return 0;
}

/*
 * In modelling, we assumed rest of the modules in pipeline are PGA. But we
 * are interested in last PGA (leaf PGA) in a pipeline to disconnect with
 * the sink when it is running (two FE to one BE or one FE to two BE)
 * scenarios
 */
static int skl_tplg_pga_event(struct snd_soc_dapm_widget *w,
			struct snd_kcontrol *k, int event)

{
	struct snd_soc_dapm_context *dapm = w->dapm;
	struct skl *skl = get_skl_ctx(dapm->dev);

	switch (event) {
	case SND_SOC_DAPM_PRE_PMU:
		return skl_tplg_pga_dapm_pre_pmu_event(w, skl);

	case SND_SOC_DAPM_POST_PMD:
		return skl_tplg_pga_dapm_post_pmd_event(w, skl);
	}

	return 0;
}