Now ASoC is supporting CPU:Codec = N:M support. This patch enables it on Audio Graph Card2.
Signed-off-by: Kuninori Morimoto kuninori.morimoto.gx@renesas.com --- sound/soc/generic/audio-graph-card2.c | 49 +++++++++++++++++++++++++++ 1 file changed, 49 insertions(+)
diff --git a/sound/soc/generic/audio-graph-card2.c b/sound/soc/generic/audio-graph-card2.c index 7146611df730..25a1c7d40be9 100644 --- a/sound/soc/generic/audio-graph-card2.c +++ b/sound/soc/generic/audio-graph-card2.c @@ -504,6 +504,7 @@ static int __graph_parse_node(struct simple_util_priv *priv, return 0; }
+#define MAX_PROP 7 static int graph_parse_node(struct simple_util_priv *priv, enum graph_type gtype, struct device_node *port, @@ -513,10 +514,31 @@ static int graph_parse_node(struct simple_util_priv *priv, int ret = 0;
if (graph_lnk_is_multi(port)) { + struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link); + struct device_node *ports = of_get_parent(port); + struct device *dev = simple_priv_to_dev(priv); int idx; + int num;
of_node_get(port);
+ /* + * create ch_maps if CPU:Codec = N:M + * DPCM is out of scope + */ + if (gtype != GRAPH_DPCM && !dai_link->ch_maps && + dai_link->num_cpus > 1 && dai_link->num_codecs > 1 && + dai_link->num_cpus != dai_link->num_codecs) { + num = max(dai_link->num_cpus, dai_link->num_codecs); + + dai_link->ch_maps = devm_kcalloc(dev, num, + sizeof(struct snd_soc_dai_link_ch_map), GFP_KERNEL); + if (!dai_link->ch_maps) { + ret = -ENOMEM; + goto multi_end; + } + } + for (idx = 0;; idx++) { ep = graph_get_next_multi_ep(&port); if (!ep) @@ -527,7 +549,34 @@ static int graph_parse_node(struct simple_util_priv *priv, of_node_put(ep); if (ret < 0) break; + + /* CPU:Codec = N:M */ + if (dai_link->ch_maps) { + const char *props = "channel-map-index"; + u32 num_array[MAX_PROP]; + int i; + + num = of_property_count_elems_of_size(ep, props, sizeof(u32)); + if (num > MAX_PROP) { + dev_err(dev, "need update MAX_PROP (%d)\n", num); + ret = -EINVAL; + goto multi_end; + } + + ret = of_property_read_u32_array(ep, props, num_array, num); + if (ret < 0) + goto multi_end; + + for (i = 0; i < num; i++) { + if (is_cpu) + dai_link->ch_maps[num_array[i]].cpu = idx; + else + dai_link->ch_maps[num_array[i]].codec = idx; + } + } } +multi_end: + of_node_put(ports); } else { /* Single CPU / Codec */ ep = port_to_endpoint(port);