path: root/sound/soc/intel/avs/path.c

// SPDX-License-Identifier: GPL-2.0-only
//
// Copyright(c) 2021 Intel Corporation
//
// Authors: Cezary Rojewski <cezary.rojewski@intel.com>
//          Amadeusz Slawinski <amadeuszx.slawinski@linux.intel.com>
//

#include <linux/acpi.h>
#include <acpi/nhlt.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include "avs.h"
#include "control.h"
#include "path.h"
#include "topology.h"

/* Must be called with adev->comp_list_mutex held. */
static struct avs_tplg *
avs_path_find_tplg(struct avs_dev *adev, const char *name)
{
	struct avs_soc_component *acomp;

	list_for_each_entry(acomp, &adev->comp_list, node)
		if (!strcmp(acomp->tplg->name, name))
			return acomp->tplg;
	return NULL;
}

static struct avs_path_module *
avs_path_find_module(struct avs_path_pipeline *ppl, u32 template_id)
{
	struct avs_path_module *mod;

	list_for_each_entry(mod, &ppl->mod_list, node)
		if (mod->template->id == template_id)
			return mod;
	return NULL;
}

static struct avs_path_pipeline *
avs_path_find_pipeline(struct avs_path *path, u32 template_id)
{
	struct avs_path_pipeline *ppl;

	list_for_each_entry(ppl, &path->ppl_list, node)
		if (ppl->template->id == template_id)
			return ppl;
	return NULL;
}

static struct avs_path *
avs_path_find_path(struct avs_dev *adev, const char *name, u32 template_id)
{
	struct avs_tplg_path_template *pos, *template = NULL;
	struct avs_tplg *tplg;
	struct avs_path *path;

	tplg = avs_path_find_tplg(adev, name);
	if (!tplg)
		return NULL;

	list_for_each_entry(pos, &tplg->path_tmpl_list, node) {
		if (pos->id == template_id) {
			template = pos;
			break;
		}
	}
	if (!template)
		return NULL;

	spin_lock(&adev->path_list_lock);
	/* Only one variant of given path template may be instantiated at a time. */
	list_for_each_entry(path, &adev->path_list, node) {
		if (path->template->owner == template) {
			spin_unlock(&adev->path_list_lock);
			return path;
		}
	}

	spin_unlock(&adev->path_list_lock);
	return NULL;
}

static bool avs_test_hw_params(struct snd_pcm_hw_params *params,
			       struct avs_audio_format *fmt)
{
	return (params_rate(params) == fmt->sampling_freq &&
		params_channels(params) == fmt->num_channels &&
		params_physical_width(params) == fmt->bit_depth &&
		snd_pcm_hw_params_bits(params) == fmt->valid_bit_depth);
}

static struct avs_tplg_path *
avs_path_find_variant(struct avs_dev *adev,
		      struct avs_tplg_path_template *template,
		      struct snd_pcm_hw_params *fe_params,
		      struct snd_pcm_hw_params *be_params)
{
	struct avs_tplg_path *variant;

	list_for_each_entry(variant, &template->path_list, node) {
		dev_dbg(adev->dev, "check FE rate %d chn %d vbd %d bd %d\n",
			variant->fe_fmt->sampling_freq, variant->fe_fmt->num_channels,
			variant->fe_fmt->valid_bit_depth, variant->fe_fmt->bit_depth);
		dev_dbg(adev->dev, "check BE rate %d chn %d vbd %d bd %d\n",
			variant->be_fmt->sampling_freq, variant->be_fmt->num_channels,
			variant->be_fmt->valid_bit_depth, variant->be_fmt->bit_depth);

		if (variant->fe_fmt && avs_test_hw_params(fe_params, variant->fe_fmt) &&
		    variant->be_fmt && avs_test_hw_params(be_params, variant->be_fmt))
			return variant;
	}

	return NULL;
}

__maybe_unused
static bool avs_dma_type_is_host(u32 dma_type)
{
	return dma_type == AVS_DMA_HDA_HOST_OUTPUT ||
	       dma_type == AVS_DMA_HDA_HOST_INPUT;
}

__maybe_unused
static bool avs_dma_type_is_link(u32 dma_type)
{
	return !avs_dma_type_is_host(dma_type);
}

__maybe_unused
static bool avs_dma_type_is_output(u32 dma_type)
{
	return dma_type == AVS_DMA_HDA_HOST_OUTPUT ||
	       dma_type == AVS_DMA_HDA_LINK_OUTPUT ||
	       dma_type == AVS_DMA_I2S_LINK_OUTPUT;
}

__maybe_unused
static bool avs_dma_type_is_input(u32 dma_type)
{
	return !avs_dma_type_is_output(dma_type);
}

static int avs_copier_create(struct avs_dev *adev, struct avs_path_module *mod)
{
	struct avs_tplg_module *t = mod->template;
	struct avs_copier_cfg *cfg;
	struct acpi_nhlt_format_config *ep_blob;
	struct acpi_nhlt_endpoint *ep;
	union avs_connector_node_id node_id = {0