From 45cc50d13433a62f23b7b4af380497aae5e8ddc7 Mon Sep 17 00:00:00 2001 From: Kuninori Morimoto Date: Mon, 13 Nov 2023 01:28:27 +0000 Subject: ASoC: makes CPU/Codec channel connection map more generic Current ASoC CPU:Codec = N:M connection is using connection mapping idea, but it is used for N < M case only. We want to use it for any case. By this patch, not only N:M connection, but all existing connection (1:1, 1:N, N:N) will use same connection mapping. Then, because it will use default mapping, no conversion patch is needed to exising drivers. More over, CPU:Codec = N:M (N > M) also supported in the same time. ch_maps array will has CPU/Codec index by this patch. Image CPU0 <---> Codec0 CPU1 <-+-> Codec1 CPU2 <-/ ch_map ch_map[0].cpu = 0 ch_map[0].codec = 0 ch_map[1].cpu = 1 ch_map[1].codec = 1 ch_map[2].cpu = 2 ch_map[2].codec = 1 Link: https://lore.kernel.org/r/87fs6wuszr.wl-kuninori.morimoto.gx@renesas.com Link: https://lore.kernel.org/r/878r7yqeo4.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Kuninori Morimoto Reviewed-by: Bard Liao Tested-by: Pierre-Louis Bossart Tested-by: Jerome Brunet Link: https://lore.kernel.org/r/87ttpq4f2c.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Mark Brown --- sound/soc/soc-core.c | 95 +++++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 94 insertions(+), 1 deletion(-) (limited to 'sound/soc/soc-core.c') diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index b2bd45e87bc3..4ca3319a8e19 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -1015,6 +1015,94 @@ component_dai_empty: return -EINVAL; } +#define MAX_DEFAULT_CH_MAP_SIZE 7 +static struct snd_soc_dai_link_ch_map default_ch_map_sync[MAX_DEFAULT_CH_MAP_SIZE] = { + { .cpu = 0, .codec = 0 }, + { .cpu = 1, .codec = 1 }, + { .cpu = 2, .codec = 2 }, + { .cpu = 3, .codec = 3 }, + { .cpu = 4, .codec = 4 }, + { .cpu = 5, .codec = 5 }, + { .cpu = 6, .codec = 6 }, +}; +static struct snd_soc_dai_link_ch_map default_ch_map_1cpu[MAX_DEFAULT_CH_MAP_SIZE] = { + { .cpu = 0, .codec = 0 }, + { .cpu = 0, .codec = 1 }, + { .cpu = 0, .codec = 2 }, + { .cpu = 0, .codec = 3 }, + { .cpu = 0, .codec = 4 }, + { .cpu = 0, .codec = 5 }, + { .cpu = 0, .codec = 6 }, +}; +static struct snd_soc_dai_link_ch_map default_ch_map_1codec[MAX_DEFAULT_CH_MAP_SIZE] = { + { .cpu = 0, .codec = 0 }, + { .cpu = 1, .codec = 0 }, + { .cpu = 2, .codec = 0 }, + { .cpu = 3, .codec = 0 }, + { .cpu = 4, .codec = 0 }, + { .cpu = 5, .codec = 0 }, + { .cpu = 6, .codec = 0 }, +}; +static int snd_soc_compensate_channel_connection_map(struct snd_soc_card *card, + struct snd_soc_dai_link *dai_link) +{ + struct snd_soc_dai_link_ch_map *ch_maps; + int i; + + /* + * dai_link->ch_maps indicates how CPU/Codec are connected. + * It will be a map seen from a larger number of DAI. + * see + * soc.h :: [dai_link->ch_maps Image sample] + */ + + /* it should have ch_maps if connection was N:M */ + if (dai_link->num_cpus > 1 && dai_link->num_codecs > 1 && + dai_link->num_cpus != dai_link->num_codecs && !dai_link->ch_maps) { + dev_err(card->dev, "need to have ch_maps when N:M connction (%s)", + dai_link->name); + return -EINVAL; + } + + /* do nothing if it has own maps */ + if (dai_link->ch_maps) + goto sanity_check; + + /* check default map size */ + if (dai_link->num_cpus > MAX_DEFAULT_CH_MAP_SIZE || + dai_link->num_codecs > MAX_DEFAULT_CH_MAP_SIZE) { + dev_err(card->dev, "soc-core.c needs update default_connection_maps"); + return -EINVAL; + } + + /* Compensate missing map for ... */ + if (dai_link->num_cpus == dai_link->num_codecs) + dai_link->ch_maps = default_ch_map_sync; /* for 1:1 or N:N */ + else if (dai_link->num_cpus < dai_link->num_codecs) + dai_link->ch_maps = default_ch_map_1cpu; /* for 1:N */ + else + dai_link->ch_maps = default_ch_map_1codec; /* for N:1 */ + +sanity_check: + dev_dbg(card->dev, "dai_link %s\n", dai_link->stream_name); + for_each_link_ch_maps(dai_link, i, ch_maps) { + if ((ch_maps->cpu >= dai_link->num_cpus) || + (ch_maps->codec >= dai_link->num_codecs)) { + dev_err(card->dev, + "unexpected dai_link->ch_maps[%d] index (cpu(%d/%d) codec(%d/%d))", + i, + ch_maps->cpu, dai_link->num_cpus, + ch_maps->codec, dai_link->num_codecs); + return -EINVAL; + } + + dev_dbg(card->dev, " [%d] cpu%d <-> codec%d\n", + i, ch_maps->cpu, ch_maps->codec); + } + + return 0; +} + /** * snd_soc_remove_pcm_runtime - Remove a pcm_runtime from card * @card: The ASoC card to which the pcm_runtime has @@ -1121,8 +1209,13 @@ int snd_soc_add_pcm_runtimes(struct snd_soc_card *card, int num_dai_link) { for (int i = 0; i < num_dai_link; i++) { - int ret = snd_soc_add_pcm_runtime(card, dai_link + i); + int ret; + + ret = snd_soc_compensate_channel_connection_map(card, dai_link + i); + if (ret < 0) + return ret; + ret = snd_soc_add_pcm_runtime(card, dai_link + i); if (ret < 0) return ret; } -- cgit v1.2.3