sound/soc/generic/audio-graph-card.c

Source file repositories/reference/linux-study-clean/sound/soc/generic/audio-graph-card.c

File Facts

System
Linux kernel
Corpus path
sound/soc/generic/audio-graph-card.c
Extension
.c
Size
18701 bytes
Lines
662
Domain
Driver Families
Bucket
sound/soc
Inferred role
Driver Families: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

if (card->component_chaining && !soc_component_is_pcm(cpus)) {
			dai_link->no_pcm = 1;
			dai_link->be_hw_params_fixup = simple_util_be_hw_params_fixup;
		}

		simple_util_canonicalize_cpu(cpus, is_single_links);
		simple_util_canonicalize_platform(platforms, cpus);
	} else {
		struct snd_soc_codec_conf *cconf = simple_props_to_codec_conf(dai_props, 0);
		struct snd_soc_dai_link_component *codecs = snd_soc_link_to_codec(dai_link, 0);

		/* CPU is dummy */

		/* BE settings */
		dai_link->no_pcm		= 1;
		dai_link->be_hw_params_fixup	= simple_util_be_hw_params_fixup;

		ret = graph_parse_node(priv, codec_ep, li, NULL);
		if (ret < 0)
			goto end;

		snprintf(dai_name, sizeof(dai_name),
			 "be.%pOFP.%s", codecs->of_node, codecs->dai_name);

		/* check "prefix" from top node */
		struct device_node *port  __free(device_node) = ep_to_port(ep);
		struct device_node *ports __free(device_node) = port_to_ports(port);

		snd_soc_of_parse_node_prefix(top,   cconf, codecs->of_node, "prefix");
		snd_soc_of_parse_node_prefix(ports, cconf, codecs->of_node, "prefix");
		snd_soc_of_parse_node_prefix(port,  cconf, codecs->of_node, "prefix");
	}

	graph_parse_convert(dev, ep, &dai_props->adata);

	ret = graph_link_init(priv, cpu_ep, codec_ep, li, dai_name);

	li->link++;
end:
	return graph_ret(priv, ret);
}

static int graph_dai_link_of(struct simple_util_priv *priv,
			     struct device_node *cpu_ep,
			     struct device_node *codec_ep,
			     struct link_info *li)
{
	struct device *dev = simple_priv_to_dev(priv);
	struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
	struct snd_soc_dai_link_component *cpus = snd_soc_link_to_cpu(dai_link, 0);
	struct snd_soc_dai_link_component *codecs = snd_soc_link_to_codec(dai_link, 0);
	struct snd_soc_dai_link_component *platforms = snd_soc_link_to_platform(dai_link, 0);
	char dai_name[64];
	int ret, is_single_links = 0;

	dev_dbg(dev, "link_of (%pOF)\n", cpu_ep);

	ret = graph_parse_node(priv, cpu_ep, li, &is_single_links);
	if (ret < 0)
		goto end;

	ret = graph_parse_node(priv, codec_ep, li, NULL);
	if (ret < 0)
		goto end;

	snprintf(dai_name, sizeof(dai_name),
		 "%s-%s", cpus->dai_name, codecs->dai_name);

	simple_util_canonicalize_cpu(cpus, is_single_links);
	simple_util_canonicalize_platform(platforms, cpus);

	ret = graph_link_init(priv, cpu_ep, codec_ep, li, dai_name);
	if (ret < 0)
		goto end;

	li->link++;
end:
	return graph_ret(priv, ret);
}

static inline bool parse_as_dpcm_link(struct simple_util_priv *priv,
				      struct device_node *codec_port,
				      struct simple_util_data *adata)
{
	if (priv->force_dpcm)
		return true;

	if (!priv->dpcm_selectable)
		return false;

Annotation

Implementation Notes