[PATCH v7 0/5] ASoC: makes CPU/Codec channel connection map more generic

[PATCH v7 0/5] ASoC: makes CPU/Codec channel connection map more generic

[Kuninori Morimoto]

Hi Mark
Cc Bard, Pierre-Louis, Jerome, DT-ML

This is v7 patch-set.

Current ASoC is supporting CPU/Codec = N:M (N < M) connection by using
ch_map idea. This patch-set expands it that all connection uses this idea,
and no longer N < M limit [1][2].

Link: https://lore.kernel.org/r/87fs6wuszr.wl-kuninori.morimoto.gx@renesas.com [1]
Link: https://lore.kernel.org/r/878r7yqeo4.wl-kuninori.morimoto.gx@renesas.com [2]

ASoC core code ([PATCH 1/5]) is same as v6 and it was tested by Pierre-Louis,
and Jerome. Big change on v7 is basically for Audio-Graph-Card2.

v6 -> v7
	- use "endpoint" for N:M connection instead of ch-map-idx on Audio-Graph-Card2

v5 -> v6
	- tidyup some warnings
	- rename "ch-map-idx" -> "channel-map-index"
	- Update "channel-map-index" description
	- add Tested-by from Pierre-Louis / Jerome

v4 -> v5
	- use cpu/codec index on ch_maps
	- separate card2 sample DT patch into prepare and new feature
	- ch-maps -> ch-map-idx on DT

v3 -> v4
	- add Jerome on To
	- add "description" on "ch-maps"

v2 -> v3
	- tidyup comment
	- use more clear connection image on DT
	- "ch_maps" -> "ch-maps" on DT
	- Add DT maintainer on "To:" for all patches

v1 -> v2
	- makes CPU/Codec connection relation clear on comment/sample
	- fixup type "connction" -> "connection"
	- makes error message clear


Kuninori Morimoto (5):
  ASoC: makes CPU/Codec channel connection map more generic
  ASoC: audio-graph-card2: use better image for Multi connection
  ASoC: audio-graph-card2: add CPU:Codec = N:M support
  ASoC: audio-graph-card2-custom-sample: Add connection image
  ASoC: audio-graph-card2-custom-sample: add CPU/Codec = N:M sample

 include/sound/soc.h                           |  56 ++-
 .../audio-graph-card2-custom-sample.dtsi      | 380 ++++++++++++++++--
 sound/soc/generic/audio-graph-card2.c         | 277 ++++++++++---
 sound/soc/intel/boards/sof_sdw.c              |  28 +-
 sound/soc/soc-core.c                          |  95 ++++-
 sound/soc/soc-dapm.c                          |  45 +--
 sound/soc/soc-pcm.c                           |  44 +-
 7 files changed, 754 insertions(+), 171 deletions(-)

-- 
2.25.1

[PATCH v7 1/5] ASoC: makes CPU/Codec channel connection map more generic

[Kuninori Morimoto]

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 <kuninori.morimoto.gx@renesas.com>
Reviewed-by:  Bard Liao <yung-chuan.liao@linux.intel.com>
Tested-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Tested-by: Jerome Brunet <jbrunet@baylibre.com>
---
 include/sound/soc.h              | 56 ++++++++++++++++++-
 sound/soc/intel/boards/sof_sdw.c | 28 ++++------
 sound/soc/soc-core.c             | 95 +++++++++++++++++++++++++++++++-
 sound/soc/soc-dapm.c             | 45 ++++-----------
 sound/soc/soc-pcm.c              | 44 +++++----------
 5 files changed, 185 insertions(+), 83 deletions(-)

diff --git a/include/sound/soc.h b/include/sound/soc.h
index 7792c393e238..f3803c2dc349 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -655,8 +655,45 @@ struct snd_soc_dai_link_component {
 	struct of_phandle_args *dai_args;
 };
 
-struct snd_soc_dai_link_codec_ch_map {
-	unsigned int connected_cpu_id;
+/*
+ * [dai_link->ch_maps Image sample]
+ *
+ *-------------------------
+ * CPU0 <---> Codec0
+ *
+ * ch-map[0].cpu = 0	ch-map[0].codec = 0
+ *
+ *-------------------------
+ * CPU0 <---> Codec0
+ * CPU1 <---> Codec1
+ * CPU2 <---> Codec2
+ *
+ * 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 = 2
+ *
+ *-------------------------
+ * CPU0 <---> Codec0
+ * CPU1 <-+-> Codec1
+ * CPU2 <-/
+ *
+ * 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
+ *
+ *-------------------------
+ * CPU0 <---> Codec0
+ * CPU1 <-+-> Codec1
+ *	  \-> Codec2
+ *
+ * ch-map[0].cpu = 0	ch-map[0].codec = 0
+ * ch-map[1].cpu = 1	ch-map[1].codec = 1
+ * ch-map[2].cpu = 1	ch-map[2].codec = 2
+ *
+ */
+struct snd_soc_dai_link_ch_map {
+	unsigned int cpu;
+	unsigned int codec;
 	unsigned int ch_mask;
 };
 
@@ -688,7 +725,9 @@ struct snd_soc_dai_link {
 	struct snd_soc_dai_link_component *codecs;
 	unsigned int num_codecs;
 
-	struct snd_soc_dai_link_codec_ch_map *codec_ch_maps;
+	/* num_ch_maps = max(num_cpu, num_codecs) */
+	struct snd_soc_dai_link_ch_map *ch_maps;
+
 	/*
 	 * You MAY specify the link's platform/PCM/DMA driver, either by
 	 * device name, or by DT/OF node, but not both. Some forms of link
@@ -775,6 +814,10 @@ struct snd_soc_dai_link {
 #endif
 };
 
+static inline int snd_soc_link_num_ch_map(struct snd_soc_dai_link *link) {
+	return max(link->num_cpus, link->num_codecs);
+}
+
 static inline struct snd_soc_dai_link_component*
 snd_soc_link_to_cpu(struct snd_soc_dai_link *link, int n) {
 	return &(link)->cpus[n];
@@ -808,6 +851,12 @@ snd_soc_link_to_platform(struct snd_soc_dai_link *link, int n) {
 		     ((cpu) = snd_soc_link_to_cpu(link, i));		\
 	     (i)++)
 
+#define for_each_link_ch_maps(link, i, ch_map)			\
+	for ((i) = 0;						\
+	     ((i) < snd_soc_link_num_ch_map(link) &&		\
+		      ((ch_map) = link->ch_maps + i));		\
+	     (i)++)
+
 /*
  * Sample 1 : Single CPU/Codec/Platform
  *
@@ -1163,6 +1212,7 @@ struct snd_soc_pcm_runtime {
 	     ((i) < (rtd)->dai_link->num_cpus + (rtd)->dai_link->num_codecs) &&	\
 		     ((dai) = (rtd)->dais[i]);				\
 	     (i)++)
+#define for_each_rtd_ch_maps(rtd, i, ch_maps) for_each_link_ch_maps(rtd->dai_link, i, ch_maps)
 
 void snd_soc_close_delayed_work(struct snd_soc_pcm_runtime *rtd);
 
diff --git a/sound/soc/intel/boards/sof_sdw.c b/sound/soc/intel/boards/sof_sdw.c
index 3312ad8a563b..2faf7372bad0 100644
--- a/sound/soc/intel/boards/sof_sdw.c
+++ b/sound/soc/intel/boards/sof_sdw.c
@@ -570,16 +570,14 @@ int sdw_hw_params(struct snd_pcm_substream *substream,
 		  struct snd_pcm_hw_params *params)
 {
 	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
+	struct snd_soc_dai_link_ch_map *ch_maps;
 	int ch = params_channels(params);
-	struct snd_soc_dai *codec_dai;
-	struct snd_soc_dai *cpu_dai;
 	unsigned int ch_mask;
 	int num_codecs;
 	int step;
 	int i;
-	int j;
 
-	if (!rtd->dai_link->codec_ch_maps)
+	if (!rtd->dai_link->ch_maps)
 		return 0;
 
 	/* Identical data will be sent to all codecs in playback */
@@ -605,13 +603,9 @@ int sdw_hw_params(struct snd_pcm_substream *substream,
 	 * link has more than one codec DAIs. Set codec channel mask and
 	 * ASoC will set the corresponding channel numbers for each cpu dai.
 	 */
-	for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
-		for_each_rtd_codec_dais(rtd, j, codec_dai) {
-			if (rtd->dai_link->codec_ch_maps[j].connected_cpu_id != i)
-				continue;
-			rtd->dai_link->codec_ch_maps[j].ch_mask = ch_mask << (j * step);
-		}
-	}
+	for_each_link_ch_maps(rtd->dai_link, i, ch_maps)
+		ch_maps->ch_mask = ch_mask << (i * step);
+
 	return 0;
 }
 
@@ -1350,15 +1344,17 @@ static int get_slave_info(const struct snd_soc_acpi_link_adr *adr_link,
 	return 0;
 }
 
-static void set_dailink_map(struct snd_soc_dai_link_codec_ch_map *sdw_codec_ch_maps,
+static void set_dailink_map(struct snd_soc_dai_link_ch_map *sdw_codec_ch_maps,
 			    int codec_num, int cpu_num)
 {
 	int step;
 	int i;
 
 	step = codec_num / cpu_num;
-	for (i = 0; i < codec_num; i++)
-		sdw_codec_ch_maps[i].connected_cpu_id = i / step;
+	for (i = 0; i < codec_num; i++) {
+		sdw_codec_ch_maps[i].cpu	= i / step;
+		sdw_codec_ch_maps[i].codec	= i;
+	}
 }
 
 static const char * const type_strings[] = {"SimpleJack", "SmartAmp", "SmartMic"};
@@ -1453,7 +1449,7 @@ static int create_sdw_dailink(struct snd_soc_card *card, int *link_index,
 		*ignore_pch_dmic = true;
 
 	for_each_pcm_streams(stream) {
-		struct snd_soc_dai_link_codec_ch_map *sdw_codec_ch_maps;
+		struct snd_soc_dai_link_ch_map *sdw_codec_ch_maps;
 		char *name, *cpu_name;
 		int playback, capture;
 		static const char * const sdw_stream_name[] = {
@@ -1530,7 +1526,7 @@ static int create_sdw_dailink(struct snd_soc_card *card, int *link_index,
 		dai_links[*link_index].nonatomic = true;
 
 		set_dailink_map(sdw_codec_ch_maps, codec_num, cpu_dai_num);
-		dai_links[*link_index].codec_ch_maps = sdw_codec_ch_maps;
+		dai_links[*link_index].ch_maps = sdw_codec_ch_maps;
 		ret = set_codec_init_func(card, adr_link, dai_links + (*link_index)++,
 					  playback, group_id, adr_index, dai_index);
 		if (ret < 0) {
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 @@ static int soc_dai_link_sanity_check(struct snd_soc_card *card,
 	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;
 	}
diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index 3844f777c87b..3d72084b6a34 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -4438,11 +4438,14 @@ static void soc_dapm_dai_stream_event(struct snd_soc_dai *dai, int stream,
 void snd_soc_dapm_connect_dai_link_widgets(struct snd_soc_card *card)
 {
 	struct snd_soc_pcm_runtime *rtd;
+	struct snd_soc_dai *cpu_dai;
 	struct snd_soc_dai *codec_dai;
-	int i;
 
 	/* for each BE DAI link... */
 	for_each_card_rtds(card, rtd)  {
+		struct snd_soc_dai_link_ch_map *ch_maps;
+		int i;
+
 		/*
 		 * dynamic FE links have no fixed DAI mapping.
 		 * CODEC<->CODEC links have no direct connection.
@@ -4450,39 +4453,15 @@ void snd_soc_dapm_connect_dai_link_widgets(struct snd_soc_card *card)
 		if (rtd->dai_link->dynamic)
 			continue;
 
-		if (rtd->dai_link->num_cpus == 1) {
-			for_each_rtd_codec_dais(rtd, i, codec_dai)
-				dapm_connect_dai_pair(card, rtd, codec_dai,
-						      snd_soc_rtd_to_cpu(rtd, 0));
-		} else if (rtd->dai_link->num_codecs == rtd->dai_link->num_cpus) {
-			for_each_rtd_codec_dais(rtd, i, codec_dai)
-				dapm_connect_dai_pair(card, rtd, codec_dai,
-						      snd_soc_rtd_to_cpu(rtd, i));
-		} else if (rtd->dai_link->num_codecs > rtd->dai_link->num_cpus) {
-			int cpu_id;
-
-			if (!rtd->dai_link->codec_ch_maps) {
-				dev_err(card->dev, "%s: no codec channel mapping table provided\n",
-					__func__);
-				continue;
-			}
+		/*
+		 * see
+		 *	soc.h :: [dai_link->ch_maps Image sample]
+		 */
+		for_each_rtd_ch_maps(rtd, i, ch_maps) {
+			cpu_dai   = snd_soc_rtd_to_cpu(rtd,   ch_maps->cpu);
+			codec_dai = snd_soc_rtd_to_codec(rtd, ch_maps->codec);
 
-			for_each_rtd_codec_dais(rtd, i, codec_dai) {
-				cpu_id = rtd->dai_link->codec_ch_maps[i].connected_cpu_id;
-				if (cpu_id >= rtd->dai_link->num_cpus) {
-					dev_err(card->dev,
-						"%s: dai_link %s cpu_id %d too large, num_cpus is %d\n",
-						__func__, rtd->dai_link->name, cpu_id,
-						rtd->dai_link->num_cpus);
-					continue;
-				}
-				dapm_connect_dai_pair(card, rtd, codec_dai,
-						      snd_soc_rtd_to_cpu(rtd, cpu_id));
-			}
-		} else {
-			dev_err(card->dev,
-				"%s: codec number %d < cpu number %d is not supported\n",
-				__func__, rtd->dai_link->num_codecs, rtd->dai_link->num_cpus);
+			dapm_connect_dai_pair(card, rtd, codec_dai, cpu_dai);
 		}
 	}
 }
diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index 323e4d7b6adf..c20573aeb756 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -1050,6 +1050,7 @@ static int __soc_pcm_hw_params(struct snd_soc_pcm_runtime *rtd,
 	}
 
 	for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
+		struct snd_soc_dai_link_ch_map *ch_maps;
 		unsigned int ch_mask = 0;
 		int j;
 
@@ -1063,22 +1064,20 @@ static int __soc_pcm_hw_params(struct snd_soc_pcm_runtime *rtd,
 		/* copy params for each cpu */
 		tmp_params = *params;
 
-		if (!rtd->dai_link->codec_ch_maps)
-			goto hw_params;
 		/*
 		 * construct cpu channel mask by combining ch_mask of each
 		 * codec which maps to the cpu.
+		 * see
+		 *	soc.h :: [dai_link->ch_maps Image sample]
 		 */
-		for_each_rtd_codec_dais(rtd, j, codec_dai) {
-			if (rtd->dai_link->codec_ch_maps[j].connected_cpu_id == i)
-				ch_mask |= rtd->dai_link->codec_ch_maps[j].ch_mask;
-		}
+		for_each_rtd_ch_maps(rtd, j, ch_maps)
+			if (ch_maps->cpu == i)
+				ch_mask |= ch_maps->ch_mask;
 
 		/* fixup cpu channel number */
 		if (ch_mask)
 			soc_pcm_codec_params_fixup(&tmp_params, ch_mask);
 
-hw_params:
 		ret = snd_soc_dai_hw_params(cpu_dai, substream, &tmp_params);
 		if (ret < 0)
 			goto out;
@@ -2826,35 +2825,20 @@ static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd,
 			}
 		}
 	} else {
+		struct snd_soc_dai_link_ch_map *ch_maps;
 		struct snd_soc_dai *codec_dai;
 
 		/* Adapt stream for codec2codec links */
 		int cpu_capture  = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_CAPTURE);
 		int cpu_playback = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_PLAYBACK);
 
-		for_each_rtd_codec_dais(rtd, i, codec_dai) {
-			if (dai_link->num_cpus == 1) {
-				cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
-			} else if (dai_link->num_cpus == dai_link->num_codecs) {
-				cpu_dai = snd_soc_rtd_to_cpu(rtd, i);
-			} else if (rtd->dai_link->num_codecs > rtd->dai_link->num_cpus) {
-				int cpu_id;
-
-				if (!rtd->dai_link->codec_ch_maps) {
-					dev_err(rtd->card->dev, "%s: no codec channel mapping table provided\n",
-						__func__);
-					return -EINVAL;
-				}
-
-				cpu_id = rtd->dai_link->codec_ch_maps[i].connected_cpu_id;
-				cpu_dai = snd_soc_rtd_to_cpu(rtd, cpu_id);
-			} else {
-				dev_err(rtd->card->dev,
-					"%s codec number %d < cpu number %d is not supported\n",
-					__func__, rtd->dai_link->num_codecs,
-					rtd->dai_link->num_cpus);
-				return -EINVAL;
-			}
+		/*
+		 * see
+		 *	soc.h :: [dai_link->ch_maps Image sample]
+		 */
+		for_each_rtd_ch_maps(rtd, i, ch_maps) {
+			cpu_dai	  = snd_soc_rtd_to_cpu(rtd,   ch_maps->cpu);
+			codec_dai = snd_soc_rtd_to_codec(rtd, ch_maps->codec);
 
 			if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
 			    snd_soc_dai_stream_valid(cpu_dai,   cpu_playback))
-- 
2.25.1

Re: [PATCH v7 1/5] ASoC: makes CPU/Codec channel connection map more generic

[Mark Brown]

[-- Attachment #1: Type: text/plain, Size: 1887 bytes --]

On Mon, Nov 13, 2023 at 01:28:27AM +0000, Kuninori Morimoto wrote:
> 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.

The KernelCI bisection bot has reported that this is breaking boot on
meson-g12a-u200 in -next with a defconfig+debug configuration:

<1>[   39.211516][   T39] Unable to handle kernel paging request at virtual address f999199999999999
<1>[   39.215123][   T39] KASAN: maybe wild-memory-access in range [0xccccccccccccccc8-0xcccccccccccccccf]

...

<4>[   39.498854][   T39] x5 : 1fffe00001b50887 x4 : 0000000000000001 x3 : ffff000013f44be8
<4>[   39.506914][   T39] x2 : dfff800000000000 x1 : 1999999999999999 x0 : 0000000000000007
<4>[   39.514975][   T39] Call trace:
<4>[   39.518356][   T39]  snd_soc_compensate_channel_connection_map+0x210/0x578
<4>[   39.525461][   T39]  snd_soc_bind_card+0x368/0x1280
<4>[   39.530575][   T39]  snd_soc_register_card+0x2e8/0x3e0
<4>[   39.535949][   T39]  devm_snd_soc_register_card+0x58/0xd8
<4>[   39.541581][   T39]  meson_card_probe+0x25c/0x388 [snd_soc_meson_card_utils]
<4>[   39.548864][   T39]  platform_probe+0xcc/0x240

Full boot log here:

   https://storage.kernelci.org/mainline/master/v6.8-rc7-250-g137e0ec05aeb/arm64/defconfig+debug/gcc-10/lab-baylibre/baseline-meson-g12a-u200.txt

with the config here:

   https://storage.kernelci.org/mainline/master/v6.8-rc7-250-g137e0ec05aeb/arm64/defconfig+debug/gcc-10/config/

The full bot report is here:

   https://groups.io/g/kernelci-results/message/52435

and everything does look plausible about the failure.

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Re: [PATCH v7 1/5] ASoC: makes CPU/Codec channel connection map more generic

[Kuninori Morimoto]

Hi

> <1>[   39.211516][   T39] Unable to handle kernel paging request at virtual address f999199999999999
> <1>[   39.215123][   T39] KASAN: maybe wild-memory-access in range [0xccccccccccccccc8-0xcccccccccccccccf]
(snip)
> <4>[   39.498854][   T39] x5 : 1fffe00001b50887 x4 : 0000000000000001 x3 : ffff000013f44be8
> <4>[   39.506914][   T39] x2 : dfff800000000000 x1 : 1999999999999999 x0 : 0000000000000007
> <4>[   39.514975][   T39] Call trace:
> <4>[   39.518356][   T39]  snd_soc_compensate_channel_connection_map+0x210/0x578
> <4>[   39.525461][   T39]  snd_soc_bind_card+0x368/0x1280
> <4>[   39.530575][   T39]  snd_soc_register_card+0x2e8/0x3e0
> <4>[   39.535949][   T39]  devm_snd_soc_register_card+0x58/0xd8
> <4>[   39.541581][   T39]  meson_card_probe+0x25c/0x388 [snd_soc_meson_card_utils]

Hmm...
does it have un-cleared "dai_link->ch_maps" ?

Thank you for your help !!

Best regards
---
Renesas Electronics
Ph.D. Kuninori Morimoto

Re: [PATCH v7 1/5] ASoC: makes CPU/Codec channel connection map more generic

[Mark Brown]

[-- Attachment #1: Type: text/plain, Size: 369 bytes --]

On Tue, Mar 12, 2024 at 01:36:47AM +0000, Kuninori Morimoto wrote:

> Hmm...
> does it have un-cleared "dai_link->ch_maps" ?

> Thank you for your help !!

I can't immediately see where ch_maps would get set for this board (it
looks like Intel is the only user?) but I might be missing something.  I
don't have the board myself so can't run anything directly - Jerome?

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Re: [PATCH v7 1/5] ASoC: makes CPU/Codec channel connection map more generic

[Jerome Brunet]

On Tue 12 Mar 2024 at 13:51, Mark Brown <broonie@kernel.org> wrote:

> [[PGP Signed Part:Undecided]]
> On Tue, Mar 12, 2024 at 01:36:47AM +0000, Kuninori Morimoto wrote:
>
>> Hmm...
>> does it have un-cleared "dai_link->ch_maps" ?
>
>> Thank you for your help !!
>
> I can't immediately see where ch_maps would get set for this board (it
> looks like Intel is the only user?) but I might be missing something.  I
> don't have the board myself so can't run anything directly - Jerome?

This board (the u200 reference design) does not have anything particular
compared to other Amlogic g12 based design. Not sure I have an u200 with me,
I'll check.

Mark, I suspect the boards you have (like the libretech Alta/Solitude or
the kvim3 maybe) will show the same thing.

The axg sound card (sound/soc/meson/axg-card.c) does not touch ch_maps.

This cards uses a few tricks to deal with this rather complicated HW.
Off the top of my head, maybe the following could complicate things
for this rework:

* dai_links are allocated with krealloc because we need to add links
  for the TDM loopbacks. Whether or not loopback are needed is only known
  halfway through the parsing of DT. Still, __GFP_ZERO is used, so ch_maps
  should be cleared - so I doubt this is the problem

* In addition to DPCM, the card uses "Codec 2 Codec" links.
  IOW, there is 2 layers of links with '.no_pcm = 1'.
  This is necessary because there another layer of digital routing past the
  DPCM backends (basically a mux between the TDM backends and internals
  codecs, like HDMI). Maybe this does not play well with this patch series.

I can't really test right now, sorry.
I can check and test further later this week.

>
> [[End of PGP Signed Part]]


-- 
Jerome

Re: [PATCH v7 1/5] ASoC: makes CPU/Codec channel connection map more generic

[Mark Brown]

[-- Attachment #1: Type: text/plain, Size: 428 bytes --]

On Tue, Mar 12, 2024 at 05:29:25PM +0100, Jerome Brunet wrote:

> Mark, I suspect the boards you have (like the libretech Alta/Solitude or
> the kvim3 maybe) will show the same thing.

I don't have the kvim3 but I can try with the other two (modulo pain
with u-boot), it'll be tomorrow now though.

> I can't really test right now, sorry.
> I can check and test further later this week.

Ack - so long as someone looks into it.

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Re: [PATCH v7 1/5] ASoC: makes CPU/Codec channel connection map more generic

[Jerome Brunet]

On Tue 12 Mar 2024 at 17:06, Mark Brown <broonie@kernel.org> wrote:

> [[PGP Signed Part:Undecided]]
> On Tue, Mar 12, 2024 at 05:29:25PM +0100, Jerome Brunet wrote:
>
>> Mark, I suspect the boards you have (like the libretech Alta/Solitude or
>> the kvim3 maybe) will show the same thing.
>
> I don't have the kvim3 but I can try with the other two (modulo pain
> with u-boot), it'll be tomorrow now though.

Submitting u-boot mainline support for these is on my TODO list :/
I'll try to speed this up as well

>
>> I can't really test right now, sorry.
>> I can check and test further later this week.
>
> Ack - so long as someone looks into it.
>
> [[End of PGP Signed Part]]


-- 
Jerome

Re: [PATCH v7 1/5] ASoC: makes CPU/Codec channel connection map more generic

[Jerome Brunet]

On Tue 12 Mar 2024 at 17:06, Mark Brown <broonie@kernel.org> wrote:

> [[PGP Signed Part:Undecided]]
> On Tue, Mar 12, 2024 at 05:29:25PM +0100, Jerome Brunet wrote:
>
>> Mark, I suspect the boards you have (like the libretech Alta/Solitude or
>> the kvim3 maybe) will show the same thing.
>
> I don't have the kvim3 but I can try with the other two (modulo pain
> with u-boot), it'll be tomorrow now though.

I've check the other boards from same SoC family (g12 and sm1) for the
same kernel build:

https://linux.kernelci.org/test/job/mainline/branch/master/kernel/v6.8-rc7-250-g137e0ec05aeb/plan/baseline/

* Only the u200 is failing. The others devices of the same family are fine.
* The u200 is the only one being test with gcc-10 / defconfig + debug
* The others have been tested with clang-16 / defconfig + CONFIG_ARM64_64K_PAGES

I've checked locally with gcc-13 on the vim3l (sm1 - s905x3)
* OK with defconfig
* Problem reproduced with defconfig + debug fragment from kCI - Observations:
  * Kernel is extremely fat (150+ MB)
  * Boot process incredibly slow.

Fragment is here:
https://storage.kernelci.org/mainline/master/v6.8-rc7-250-g137e0ec05aeb/arm64/defconfig+debug/gcc-10/config/kernelci.config

I'll continue to check but this is apparently related to the options
turned on by the debug fragment. Maybe it could be interesting to check
another non-intel SoC manufacturer using DPCM with this fragment ?
(another device relying on cleared ch_maps - Renesas and/or MTK maybe ?)

-- 
Jerome

Re: [PATCH v7 1/5] ASoC: makes CPU/Codec channel connection map more generic

[Mark Brown]

[-- Attachment #1: Type: text/plain, Size: 555 bytes --]

On Wed, Mar 13, 2024 at 10:36:41AM +0100, Jerome Brunet wrote:

> * Only the u200 is failing. The others devices of the same family are fine.

Oh, that's a shame :(

> I'll continue to check but this is apparently related to the options
> turned on by the debug fragment. Maybe it could be interesting to check
> another non-intel SoC manufacturer using DPCM with this fragment ?
> (another device relying on cleared ch_maps - Renesas and/or MTK maybe ?)

The error reported was a kasan one so it may just be that that needs to
be turned on to reproduce.

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Re: [PATCH v7 1/5] ASoC: makes CPU/Codec channel connection map more generic

[Kuninori Morimoto]

Hi Jerome

> Fragment is here:
(snip)
> I'll continue to check but this is apparently related to the options
> turned on by the debug fragment. Maybe it could be interesting to check
> another non-intel SoC manufacturer using DPCM with this fragment ?
> (another device relying on cleared ch_maps - Renesas and/or MTK maybe ?)

I tryed to add your debug fragment into my normal defconfig.
The kernel size indeed become very huge, and boot process becomes slow,
but kernel start works, and DPCM test could work for me.

I tested on v6.8 Kernel and Renesas ULCB-KF board with DPCM sound settings,
and with ${LINUX}/sound/soc/generic/audio-graph-card2-custom-sample.dtsi
which is using Multi-CPU/Codec, DPCM, Codec2Codec, etc.

Thank you for your help !!

Best regards
---
Renesas Electronics
Ph.D. Kuninori Morimoto

[PATCH v7 2/5] ASoC: audio-graph-card2: use better image for Multi connection

[Kuninori Morimoto]

1st port on Multi ports is for paired CPU/Codec, and the 2nd or later
port are for Multi Elements. This patch indicates its image to easy to
understand.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
 sound/soc/generic/audio-graph-card2.c | 52 +++++++++++++--------------
 1 file changed, 26 insertions(+), 26 deletions(-)

diff --git a/sound/soc/generic/audio-graph-card2.c b/sound/soc/generic/audio-graph-card2.c
index 7146611df730..c564f630abf6 100644
--- a/sound/soc/generic/audio-graph-card2.c
+++ b/sound/soc/generic/audio-graph-card2.c
@@ -83,32 +83,32 @@
 	Multi-CPU/Codec
  ************************************
 
-It has connection part (= X) and list part (= y).
-links indicates connection part of CPU side (= A).
+It has link connection part (= X,x) and list part (= A,B,a,b).
+"links" is connection part of CPU side (= @).
 
-	    +-+   (A)	     +-+
- CPU1 --(y) | | <-(X)--(X)-> | | (y)-- Codec1
- CPU2 --(y) | |		     | | (y)-- Codec2
-	    +-+		     +-+
+	+----+		+---+
+ CPU1 --|A  X| <-@----> |x a|-- Codec1
+ CPU2 --|B   |		|  b|-- Codec2
+	+----+		+---+
 
-	sound {
-		compatible = "audio-graph-card2";
+ sound {
+	compatible = "audio-graph-card2";
 
-(A)		links = <&mcpu>;
+(@)	links = <&mcpu>;
 
-		multi {
-			ports@0 {
-(X) (A)			mcpu:	port@0 { mcpu0_ep: endpoint { remote-endpoint = <&mcodec0_ep>; }; };
-(y)				port@1 { mcpu1_ep: endpoint { remote-endpoint = <&cpu1_ep>; }; };
-(y)				port@2 { mcpu2_ep: endpoint { remote-endpoint = <&cpu2_ep>; }; };
-			};
-			ports@1 {
-(X)				port@0 { mcodec0_ep: endpoint { remote-endpoint = <&mcpu0_ep>; }; };
-(y)				port@1 { mcodec1_ep: endpoint { remote-endpoint = <&codec1_ep>; }; };
-(y)				port@2 { mcodec2_ep: endpoint { remote-endpoint = <&codec2_ep>; }; };
-			};
+	multi {
+		ports@0 {
+(@)		mcpu:	port@0 { mcpu0_ep: endpoint { remote-endpoint = <&mcodec0_ep>;	}; };	// (X) to pair
+			port@1 { mcpu1_ep: endpoint { remote-endpoint = <&cpu1_ep>;	}; };	// (A) Multi Element
+			port@2 { mcpu2_ep: endpoint { remote-endpoint = <&cpu2_ep>;	}; };	// (B) Multi Element
+		};
+		ports@1 {
+			port@0 { mcodec0_ep: endpoint { remote-endpoint = <&mcpu0_ep>;	}; };	// (x) to pair
+			port@1 { mcodec1_ep: endpoint { remote-endpoint = <&codec1_ep>;	}; };	// (a) Multi Element
+			port@2 { mcodec2_ep: endpoint { remote-endpoint = <&codec2_ep>;	}; };	// (b) Multi Element
 		};
 	};
+ };
 
  CPU {
 	ports {
@@ -328,9 +328,9 @@ static struct device_node *graph_get_next_multi_ep(struct device_node **port)
 	/*
 	 * multi {
 	 *	ports {
-	 * =>	lnk:	port@0 { ... };
-	 *		port@1 { ep { ... = rep0 } };
-	 *		port@2 { ep { ... = rep1 } };
+	 * =>	lnk:	port@0 { ...		   }; // to pair
+	 *		port@1 { ep { ... = rep0 } }; // Multi Element
+	 *		port@2 { ep { ... = rep1 } }; // Multi Element
 	 *		...
 	 *	};
 	 * };
@@ -920,9 +920,9 @@ static int graph_counter(struct device_node *lnk)
 	 *
 	 * multi {
 	 *	ports {
-	 * =>		lnk:	port@0 { ... };
-	 *			port@1 { ... };
-	 *			port@2 { ... };
+	 * =>		lnk:	port@0 { ... }; // to pair
+	 *			port@1 { ... }; // Multi Element
+	 *			port@2 { ... }; // Multi Element
 	 *			...
 	 *	};
 	 * };
-- 
2.25.1

[PATCH v7 3/5] ASoC: audio-graph-card2: add CPU:Codec = N:M support

[Kuninori Morimoto]

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 | 225 +++++++++++++++++++++++---
 1 file changed, 202 insertions(+), 23 deletions(-)

diff --git a/sound/soc/generic/audio-graph-card2.c b/sound/soc/generic/audio-graph-card2.c
index c564f630abf6..d9e10308a508 100644
--- a/sound/soc/generic/audio-graph-card2.c
+++ b/sound/soc/generic/audio-graph-card2.c
@@ -504,40 +504,203 @@ static int __graph_parse_node(struct simple_util_priv *priv,
 	return 0;
 }
 
-static int graph_parse_node(struct simple_util_priv *priv,
-			    enum graph_type gtype,
-			    struct device_node *port,
-			    struct link_info *li, int is_cpu)
+static int graph_parse_node_multi_nm(struct snd_soc_dai_link *dai_link,
+				     int *nm_idx, int cpu_idx,
+				     struct device_node *mcpu_port)
 {
-	struct device_node *ep;
-	int ret = 0;
+	/*
+	 *		+---+		+---+
+	 *		|  X|<-@------->|x  |
+	 *		|   |		|   |
+	 *	cpu0 <--|A 1|<--------->|4 a|-> codec0
+	 *	cpu1 <--|B 2|<-----+--->|5 b|-> codec1
+	 *	cpu2 <--|C 3|<----/	+---+
+	 *		+---+
+	 *
+	 * multi {
+	 *	ports {
+	 *		port@0 { mcpu_top_ep	{...  = mcodec_ep;	}; };	// (X) to pair
+	 * <mcpu_port>	port@1 { mcpu0_ep	{ ... = cpu0_ep;	};	// (A) Multi Element
+	 *			 mcpu0_ep_0	{ ... = mcodec0_ep_0;	}; };	// (1) connected Codec
+	 *		port@2 { mcpu1_ep	{ ... = cpu1_ep;	};	// (B) Multi Element
+	 *			 mcpu1_ep_0	{ ... = mcodec1_ep_0;	}; };	// (2) connected Codec
+	 *		port@3 { mcpu2_ep	{ ... = cpu2_ep;	};	// (C) Multi Element
+	 *			 mcpu2_ep_0	{ ... = mcodec1_ep_1;	}; };	// (3) connected Codec
+	 *	};
+	 *
+	 *	ports {
+	 *		port@0 { mcodec_top_ep	{...  = mcpu_ep;	}; };	// (x) to pair
+	 * <mcodec_port>port@1 { mcodec0_ep	{ ... = codec0_ep;	};	// (a) Multi Element
+	 *			 mcodec0_ep_0	{ ... = mcpu0_ep_0;	}; };	// (4) connected CPU
+	 *		port@2 { mcodec1_ep	{ ... = codec1_ep;	};	// (b) Multi Element
+	 *			 mcodec1_ep_0	{ ... = mcpu1_ep_0;	};	// (5) connected CPU
+	 *			 mcodec1_ep_1	{ ... = mcpu2_ep_0;	}; };	// (5) connected CPU
+	 *	};
+	 * };
+	 */
+	struct device_node *mcpu_ep		= port_to_endpoint(mcpu_port);
+	struct device_node *mcpu_ep_n		= mcpu_ep;
+	struct device_node *mcpu_port_top	= of_get_next_child(of_get_parent(mcpu_port), NULL);
+	struct device_node *mcpu_ep_top		= port_to_endpoint(mcpu_port_top);
+	struct device_node *mcodec_ep_top	= of_graph_get_remote_endpoint(mcpu_ep_top);
+	struct device_node *mcodec_port_top	= of_get_parent(mcodec_ep_top);
+	struct device_node *mcodec_ports	= of_get_parent(mcodec_port_top);
+	int nm_max = max(dai_link->num_cpus, dai_link->num_codecs);
+	int ret = -EINVAL;
 
-	if (graph_lnk_is_multi(port)) {
-		int idx;
+	if (cpu_idx > dai_link->num_cpus)
+		goto mcpu_err;
 
-		of_node_get(port);
+	while (1) {
+		struct device_node *mcodec_ep_n;
+		struct device_node *mcodec_port_i;
+		struct device_node *mcodec_port;
+		int codec_idx;
 
-		for (idx = 0;; idx++) {
-			ep = graph_get_next_multi_ep(&port);
-			if (!ep)
-				break;
+		if (*nm_idx > nm_max)
+			break;
 
-			ret = __graph_parse_node(priv, gtype, ep,
-						 li, is_cpu, idx);
-			of_node_put(ep);
-			if (ret < 0)
+		mcpu_ep_n = of_get_next_child(mcpu_port, mcpu_ep_n);
+		if (!mcpu_ep_n) {
+			ret = 0;
+			break;
+		}
+
+		mcodec_ep_n	= of_graph_get_remote_endpoint(mcpu_ep_n);
+		mcodec_port	= of_get_parent(mcodec_ep_n);
+
+		if (mcodec_ports != of_get_parent(mcodec_port))
+			goto mcpu_err;
+
+		codec_idx = 0;
+		mcodec_port_i = of_get_next_child(mcodec_ports, NULL);
+		while (1) {
+			if (codec_idx > dai_link->num_codecs)
+				goto mcodec_err;
+
+			mcodec_port_i = of_get_next_child(mcodec_ports, mcodec_port_i);
+
+			if (!mcodec_port_i)
+				goto mcodec_err;
+
+			if (mcodec_port_i == mcodec_port)
 				break;
+
+			codec_idx++;
 		}
-	} else {
-		/* Single CPU / Codec */
-		ep = port_to_endpoint(port);
-		ret = __graph_parse_node(priv, gtype, ep, li, is_cpu, 0);
+
+		dai_link->ch_maps[*nm_idx].cpu		= cpu_idx;
+		dai_link->ch_maps[*nm_idx].codec	= codec_idx;
+
+		(*nm_idx)++;
+
+		of_node_put(mcodec_port_i);
+mcodec_err:
+		of_node_put(mcodec_port);
+		of_node_put(mcpu_ep_n);
+		of_node_put(mcodec_ep_n);
+	}
+mcpu_err:
+	of_node_put(mcpu_ep);
+	of_node_put(mcpu_port_top);
+	of_node_put(mcpu_ep_top);
+	of_node_put(mcodec_ep_top);
+	of_node_put(mcodec_port_top);
+	of_node_put(mcodec_ports);
+
+	return ret;
+}
+
+static int graph_parse_node_multi(struct simple_util_priv *priv,
+				  enum graph_type gtype,
+				  struct device_node *port,
+				  struct link_info *li, int is_cpu)
+{
+	struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
+	struct device *dev = simple_priv_to_dev(priv);
+	struct device_node *ep;
+	int ret = -ENOMEM;
+	int nm_idx = 0;
+	int nm_max = max(dai_link->num_cpus, dai_link->num_codecs);
+
+	/*
+	 * 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) {
+
+		dai_link->ch_maps = devm_kcalloc(dev, nm_max,
+					sizeof(struct snd_soc_dai_link_ch_map), GFP_KERNEL);
+		if (!dai_link->ch_maps)
+			goto multi_err;
+	}
+
+	for (int idx = 0;; idx++) {
+		/*
+		 * multi {
+		 *	ports {
+		 * <port>	port@0 { ... 			    }; // to pair
+		 *		port@1 { mcpu1_ep { ... = cpu1_ep };}; // Multi Element
+		 *		port@2 { mcpu2_ep { ... = cpu2_ep };}; // Multi Element
+		 *	};
+		 * };
+		 *
+		 * cpu {
+		 *	ports {
+		 * <ep>		port@0 { cpu1_ep   { ... = mcpu1_ep };};
+		 *	};
+		 * };
+		 */
+		ep = graph_get_next_multi_ep(&port);
+		if (!ep)
+			break;
+
+		ret = __graph_parse_node(priv, gtype, ep, li, is_cpu, idx);
 		of_node_put(ep);
+		if (ret < 0)
+			goto multi_err;
+
+		/* CPU:Codec = N:M */
+		if (is_cpu && dai_link->ch_maps) {
+			ret = graph_parse_node_multi_nm(dai_link, &nm_idx, idx, port);
+			if (ret < 0)
+				goto multi_err;
+		}
 	}
 
+	if (is_cpu && dai_link->ch_maps && (nm_idx != nm_max))
+		ret = -EINVAL;
+
+multi_err:
 	return ret;
 }
 
+static int graph_parse_node_single(struct simple_util_priv *priv,
+				   enum graph_type gtype,
+				   struct device_node *port,
+				   struct link_info *li, int is_cpu)
+{
+	struct device_node *ep = port_to_endpoint(port);
+	int ret = __graph_parse_node(priv, gtype, ep, li, is_cpu, 0);
+
+	of_node_put(ep);
+
+	return ret;
+}
+
+static int graph_parse_node(struct simple_util_priv *priv,
+			    enum graph_type gtype,
+			    struct device_node *port,
+			    struct link_info *li, int is_cpu)
+{
+	if (graph_lnk_is_multi(port))
+		return graph_parse_node_multi(priv, gtype, port, li, is_cpu);
+	else
+		return graph_parse_node_single(priv, gtype, port, li, is_cpu);
+}
+
 static void graph_parse_daifmt(struct device_node *node,
 			       unsigned int *daifmt, unsigned int *bit_frame)
 {
@@ -929,8 +1092,24 @@ static int graph_counter(struct device_node *lnk)
 	 *
 	 * ignore first lnk part
 	 */
-	if (graph_lnk_is_multi(lnk))
-		return of_graph_get_endpoint_count(of_get_parent(lnk)) - 1;
+	if (graph_lnk_is_multi(lnk)) {
+		struct device_node *ports = of_get_parent(lnk);
+		struct device_node *port = NULL;
+		int cnt = 0;
+
+		/*
+		 * CPU/Codec = N:M case has many endpoints.
+		 * We can't use of_graph_get_endpoint_count() here
+		 */
+		while(1) {
+			port = of_get_next_child(ports, port);
+			if (!port)
+				break;
+			cnt++;
+		}
+
+		return cnt - 1;
+	}
 	/*
 	 * Single CPU / Codec
 	 */
-- 
2.25.1

[PATCH v7 4/5] ASoC: audio-graph-card2-custom-sample: Add connection image

[Kuninori Morimoto]

Audio Graph Card2 is supporting many type of Sound connections, but
thus it is very difficult to understand how these are connected.

To support well understanding, adds each connection images and indicates
each settings are for where.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
 .../audio-graph-card2-custom-sample.dtsi      | 181 ++++++++++++++----
 1 file changed, 142 insertions(+), 39 deletions(-)

diff --git a/sound/soc/generic/audio-graph-card2-custom-sample.dtsi b/sound/soc/generic/audio-graph-card2-custom-sample.dtsi
index 8acaa2ddb335..7e2cd9cc3fa8 100644
--- a/sound/soc/generic/audio-graph-card2-custom-sample.dtsi
+++ b/sound/soc/generic/audio-graph-card2-custom-sample.dtsi
@@ -58,7 +58,7 @@ / {
 	 *			| |-> codec13
 	 *			+-+
 	 *
-	 * [Multi-CPU/Codec]
+	 * [Multi-CPU/Codec-0]
 	 *		+-+		+-+
 	 *	cpu1 <--| |<-@--------->| |-> codec1
 	 *	cpu2 <--| |		| |-> codec2
@@ -144,11 +144,14 @@ audio-graph-card2-custom-sample {
 			 */
 			 &cpu0
 
-			/* [Semi-Multi] */
+			/*
+			 * [Semi-Multi]
+			 * cpu7/codec12/codec13
+			 */
 			&sm0
 
 			/*
-			 * [Multi-CPU/Codec]: cpu side only
+			 * [Multi-CPU/Codec-0]: cpu side only
 			 * cpu1/cpu2/codec1/codec2
 			 */
 			 &mcpu0
@@ -182,64 +185,115 @@ multi {
 			#address-cells = <1>;
 			#size-cells = <0>;
 
+			/*
+			 * [Multi-CPU-0]
+			 *
+			 *		+---+		+---+
+			 *	cpu1 <--|A X|<-@------->|x a|-> codec1
+			 *	cpu2 <--|B  |		|  b|-> codec2
+			 *		+---+		+---+
+			 */
 			ports@0 {
 				reg = <0>;
 				#address-cells = <1>;
 				#size-cells = <0>;
-			/* [Multi-CPU] */
-			mcpu0:	port@0 { reg = <0>; mcpu0_ep: endpoint { remote-endpoint = <&mcodec0_ep>; }; };
-				port@1 { reg = <1>; mcpu1_ep: endpoint { remote-endpoint = <&cpu1_ep>;    }; };
-				port@2 { reg = <2>; mcpu2_ep: endpoint { remote-endpoint = <&cpu2_ep>;    }; };
+			mcpu0:	port@0 { reg = <0>; mcpu00_ep: endpoint { remote-endpoint = <&mcodec00_ep>; };};/* (X) to pair */
+				port@1 { reg = <1>; mcpu01_ep: endpoint { remote-endpoint = <&cpu1_ep>;     };};/* (A) Multi Element */
+				port@2 { reg = <2>; mcpu02_ep: endpoint { remote-endpoint = <&cpu2_ep>;     };};/* (B) Multi Element */
 			};
 
-			/* [Multi-Codec] */
+			/*
+			 * [Multi-Codec-0]
+			 *
+			 *		+---+		+---+
+			 *	cpu1 <--|A X|<-@------->|x a|-> codec1
+			 *	cpu2 <--|B  |		|  b|-> codec2
+			 *		+---+		+---+
+			 */
 			ports@1 {
 				reg = <1>;
 				#address-cells = <1>;
 				#size-cells = <0>;
-				port@0 { reg = <0>; mcodec0_ep: endpoint { remote-endpoint = <&mcpu0_ep>;  }; };
-				port@1 { reg = <1>; mcodec1_ep: endpoint { remote-endpoint = <&codec1_ep>; }; };
-				port@2 { reg = <2>; mcodec2_ep: endpoint { remote-endpoint = <&codec2_ep>; }; };
+				port@0 { reg = <0>; mcodec00_ep: endpoint { remote-endpoint = <&mcpu00_ep>; };};/* (x) to pair */
+				port@1 { reg = <1>; mcodec01_ep: endpoint { remote-endpoint = <&codec1_ep>; };};/* (a) Multi Element */
+				port@2 { reg = <2>; mcodec02_ep: endpoint { remote-endpoint = <&codec2_ep>; };};/* (b) Multi Element */
 			};
 
-			/* [DPCM-Multi]::BE */
+			/*
+			 * [DPCM-Multi]::BE
+			 *
+			 *	FE			BE
+			 *		  ****		+---+
+			 *	cpu5 <-@--*  *-----@--->|x a|-> codec4
+			 *	cpu6 <-@--*  *		|  b|-> codec5
+			 *		  ****		+---+
+			 */
 			ports@2 {
 				reg = <2>;
 				#address-cells = <1>;
 				#size-cells = <0>;
-				port@0 { reg = <0>; mbe_ep:  endpoint { remote-endpoint = <&be10_ep>;  }; };
-				port@1 { reg = <1>; mbe1_ep: endpoint { remote-endpoint = <&codec4_ep>; }; };
-				port@2 { reg = <2>; mbe2_ep: endpoint { remote-endpoint = <&codec5_ep>; }; };
+				port@0 { reg = <0>; mbe_ep:  endpoint { remote-endpoint = <&be10_ep>;   };};/* (x) to pair */
+				port@1 { reg = <1>; mbe1_ep: endpoint { remote-endpoint = <&codec4_ep>; };};/* (a) Multi Element */
+				port@2 { reg = <2>; mbe2_ep: endpoint { remote-endpoint = <&codec5_ep>; };};/* (b) Multi Element */
 			};
 
-			/* [Codec2Codec-Multi]::CPU */
+			/*
+			 * [Codec2Codec-Multi]::CPU
+			 *
+			 *		+---+
+			 *	   +-@->|X A|-> codec8
+			 *	   |	|  B|-> codec9
+			 *	   |	+---+
+			 *	   |	+---+
+			 *	   +--->|x a|-> codec10
+			 *		|  b|-> codec11
+			 *		+---+
+			 */
 			ports@3 {
 				reg = <3>;
 				#address-cells = <1>;
 				#size-cells = <0>;
-				port@0 { reg = <0>; mc2c0_ep:  endpoint { remote-endpoint = <&c2cmf_ep>;  }; };
-				port@1 { reg = <1>; mc2c00_ep: endpoint { remote-endpoint = <&codec8_ep>; }; };
-				port@2 { reg = <2>; mc2c01_ep: endpoint { remote-endpoint = <&codec9_ep>; }; };
+				port@0 { reg = <0>; mc2c0_ep:  endpoint { remote-endpoint = <&c2cmf_ep>;  };};/* (X) to pair */
+				port@1 { reg = <1>; mc2c00_ep: endpoint { remote-endpoint = <&codec8_ep>; };};/* (A) Multi Element */
+				port@2 { reg = <2>; mc2c01_ep: endpoint { remote-endpoint = <&codec9_ep>; };};/* (B) Multi Element */
 			};
 
-			/* [Codec2Codec-Multi]::Codec */
+			/*
+			 * [Codec2Codec-Multi]::Codec
+			 *
+			 *		+---+
+			 *	   +-@->|X A|-> codec8
+			 *	   |	|  B|-> codec9
+			 *	   |	+---+
+			 *	   |	+---+
+			 *	   +--->|x a|-> codec10
+			 *		|  b|-> codec11
+			 *		+---+
+			 */
 			ports@4 {
 				reg = <4>;
 				#address-cells = <1>;
 				#size-cells = <0>;
-				port@0 { reg = <0>; mc2c1_ep:  endpoint { remote-endpoint = <&c2cmb_ep>;  }; };
-				port@1 { reg = <1>; mc2c10_ep: endpoint { remote-endpoint = <&codec10_ep>; }; };
-				port@2 { reg = <2>; mc2c11_ep: endpoint { remote-endpoint = <&codec11_ep>; }; };
+				port@0 { reg = <0>; mc2c1_ep:  endpoint { remote-endpoint = <&c2cmb_ep>;   };};/* (x) to pair */
+				port@1 { reg = <1>; mc2c10_ep: endpoint { remote-endpoint = <&codec10_ep>; };};/* (a) Multi Element */
+				port@2 { reg = <2>; mc2c11_ep: endpoint { remote-endpoint = <&codec11_ep>; };};/* (b) Multi Element */
 			};
 
-			/* [Semi-Multi] */
+			/*
+			 * [Semi-Multi]
+			 *
+			 *			+---+
+			 *	cpu7 <-@------->|X A|-> codec12
+			 *			|  B|-> codec13
+			 *			+---+
+			 */
 			ports@5 {
 				reg = <5>;
 				#address-cells = <1>;
 				#size-cells = <0>;
-				port@0 { reg = <0>; smcodec0_ep: endpoint { remote-endpoint = <&cpu7_ep>;    }; };
-				port@1 { reg = <1>; smcodec1_ep: endpoint { remote-endpoint = <&codec12_ep>; }; };
-				port@2 { reg = <2>; smcodec2_ep: endpoint { remote-endpoint = <&codec13_ep>; }; };
+				port@0 { reg = <0>; smcodec0_ep: endpoint { remote-endpoint = <&cpu7_ep>;    };};/* (X) to pair */
+				port@1 { reg = <1>; smcodec1_ep: endpoint { remote-endpoint = <&codec12_ep>; };};/* (A) Multi Element */
+				port@2 { reg = <2>; smcodec2_ep: endpoint { remote-endpoint = <&codec13_ep>; };};/* (B) Multi Element */
 			};
 		};
 
@@ -252,11 +306,27 @@ ports@0 {
 
 				#address-cells = <1>;
 				#size-cells = <0>;
-			/* [DPCM]::FE */
+				/*
+				 * [DPCM]::FE
+				 *
+				 *	FE				BE
+				 *			****
+				 *	cpu3 <-@(fe00)--*  *--(be0)@--> codec3
+				 *	cpu4 <-@(fe01)--*  *		(44.1kHz)
+				 *			****
+				 */
 			fe00:	port@0 { reg = <0>; fe00_ep: endpoint { remote-endpoint = <&cpu3_ep>; }; };
 			fe01:	port@1 { reg = <1>; fe01_ep: endpoint { remote-endpoint = <&cpu4_ep>; }; };
 
-			/* [DPCM-Multi]::FE */
+				/*
+				 * [DPCM-Multi]::FE
+				 *
+				 *		FE			BE
+				 *			****		+-+
+				 *	cpu5 <-@(fe10)--*  *---(be1)@-->| |-> codec4
+				 *	cpu6 <-@(fe11)--*  *		| |-> codec5
+				 *			****		+-+
+				 */
 			fe10:	port@2 { reg = <2>; fe10_ep: endpoint { remote-endpoint = <&cpu5_ep>; }; };
 			fe11:	port@3 { reg = <3>; fe11_ep: endpoint { remote-endpoint = <&cpu6_ep>; }; };
 			};
@@ -266,10 +336,26 @@ ports@1 {
 
 				#address-cells = <1>;
 				#size-cells = <0>;
-			/* [DPCM]::BE */
+				/*
+				 * [DPCM]::BE
+				 *
+				 *	FE				BE
+				 *			****
+				 *	cpu3 <-@(fe00)--*  *--(be0)@--> codec3
+				 *	cpu4 <-@(fe01)--*  *		(44.1kHz)
+				 *			****
+				 */
 			be0:	port@0 { reg = <0>; be00_ep: endpoint { remote-endpoint = <&codec3_ep>; }; };
 
-			/* [DPCM-Multi]::BE */
+				/*
+				 * [DPCM-Multi]::BE
+				 *
+				 *		FE			BE
+				 *			****		+-+
+				 *	cpu5 <-@(fe10)--*  *---(be1)@-->| |-> codec4
+				 *	cpu6 <-@(fe11)--*  *		| |-> codec5
+				 *			****		+-+
+				 */
 			be1:	port@1 { reg = <1>; be10_ep: endpoint { remote-endpoint = <&mbe_ep>; }; };
 			};
 		};
@@ -277,7 +363,13 @@ ports@1 {
 		codec2codec {
 			#address-cells = <1>;
 			#size-cells = <0>;
-			/* [Codec2Codec] */
+			/*
+			 * [Codec2Codec]
+			 *
+			 *	+-@(c2c)-> codec6
+			 *	|
+			 *	+--------> codec7
+			 */
 			ports@0 {
 				reg = <0>;
 
@@ -289,7 +381,18 @@ ports@0 {
 				port@1 { reg = <1>; c2cb_ep: endpoint { remote-endpoint = <&codec7_ep>; }; };
 			};
 
-			/* [Codec2Codec-Multi] */
+			/*
+			 * [Codec2Codec-Multi]
+			 *
+			 *			+-+
+			 *	   +-@(c2c_m)-->| |-> codec8
+			 *	   |		| |-> codec9
+			 *	   |		+-+
+			 *	   |		+-+
+			 *	   +----------->| |-> codec10
+			 *			| |-> codec11
+			 *			+-+
+			 */
 			ports@1 {
 				reg = <1>;
 
@@ -323,9 +426,9 @@ ports {
 			/* [Normal] */
 			cpu0: port@0 { reg = <0>; cpu0_ep: endpoint { remote-endpoint = <&codec0_ep>; }; };
 
-			/* [Multi-CPU] */
-			      port@1 { reg = <1>; cpu1_ep: endpoint { remote-endpoint = <&mcpu1_ep>; }; };
-			      port@2 { reg = <2>; cpu2_ep: endpoint { remote-endpoint = <&mcpu2_ep>; }; };
+			/* [Multi-CPU-0] */
+			      port@1 { reg = <1>; cpu1_ep: endpoint { remote-endpoint = <&mcpu01_ep>; }; };
+			      port@2 { reg = <2>; cpu2_ep: endpoint { remote-endpoint = <&mcpu02_ep>; }; };
 
 			/* [DPCM]::FE */
 			      port@3 { reg = <3>; cpu3_ep: endpoint { remote-endpoint = <&fe00_ep>; }; };
@@ -363,9 +466,9 @@ ports {
 			/* [Normal] */
 			port@0  { reg = <0>; codec0_ep:  endpoint { remote-endpoint = <&cpu0_ep>; }; };
 
-			/* [Multi-Codec] */
-			port@1  { reg = <1>; codec1_ep:  endpoint { remote-endpoint = <&mcodec1_ep>; }; };
-			port@2  { reg = <2>; codec2_ep:  endpoint { remote-endpoint = <&mcodec2_ep>; }; };
+			/* [Multi-Codec-0] */
+			port@1  { reg = <1>; codec1_ep:  endpoint { remote-endpoint = <&mcodec01_ep>; }; };
+			port@2  { reg = <2>; codec2_ep:  endpoint { remote-endpoint = <&mcodec02_ep>; }; };
 
 			/* [DPCM]::BE */
 			port@3  {
-- 
2.25.1

[PATCH v7 5/5] ASoC: audio-graph-card2-custom-sample: add CPU/Codec = N:M sample

[Kuninori Morimoto]

Now ASoC is supporting CPU/Codec = N:M connection, add its sample
settings.

One note here is that it has many type of samples, it reached to
maximum of sound minor number. Therefore, new sample is disabled so far.
If you want to try it, you need to disable some other one instead.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
 .../audio-graph-card2-custom-sample.dtsi      | 199 ++++++++++++++++++
 1 file changed, 199 insertions(+)

diff --git a/sound/soc/generic/audio-graph-card2-custom-sample.dtsi b/sound/soc/generic/audio-graph-card2-custom-sample.dtsi
index 7e2cd9cc3fa8..9efd31206c9b 100644
--- a/sound/soc/generic/audio-graph-card2-custom-sample.dtsi
+++ b/sound/soc/generic/audio-graph-card2-custom-sample.dtsi
@@ -64,6 +64,26 @@ / {
 	 *	cpu2 <--| |		| |-> codec2
 	 *		+-+		+-+
 	 *
+	 * [Multi-CPU/Codec-1]
+	 *
+	 *		+-+		+-+
+	 *		| |<-@--------->| |
+	 *		| |		| |
+	 *	cpu8 <--| |<----------->| |-> codec14
+	 *	cpu9 <--| |<---+------->| |-> codec15
+	 *		+-+	\------>| |-> codec16
+	 *				+-+
+	 *
+	 * [Multi-CPU/Codec-2]
+	 *
+	 *		+-+		+-+
+	 *		| |<-@--------->| |
+	 *		| |		| |
+	 *	cpu10 <-| |<----------->| |-> codec17
+	 *	cpu11 <-| |<-----+----->| |-> codec18
+	 *	cpu12 <-| |<----/	+-+
+	 *		+-+
+	 *
 	 * [DPCM]
 	 *
 	 *	CPU3/CPU4 are converting rate to 44100
@@ -156,6 +176,26 @@ &sm0
 			 */
 			 &mcpu0
 
+			/*
+			 * [Multi-CPU/Codec-1]: cpu side only
+			 * cpu8/cpu9/codec14/codec15/codec16
+			 *
+			 * Because it will reach to the maximum of sound minor number,
+			 * disable it so far.
+			 * If you want to try it, please disable some other one instead.
+			 */
+			//&mcpu1
+
+			/*
+			 * [Multi-CPU/Codec-2]: cpu side only
+			 * cpu10/cpu11/cpu12/codec17/codec18
+			 *
+			 * Because it will reach to the maximum of sound minor number,
+			 * disable it so far.
+			 * If you want to try it, please disable some other one instead.
+			 */
+			//&mcpu2
+
 			/*
 			 * [DPCM]: both FE / BE
 			 * cpu3/cpu4/codec3
@@ -295,6 +335,150 @@ ports@5 {
 				port@1 { reg = <1>; smcodec1_ep: endpoint { remote-endpoint = <&codec12_ep>; };};/* (A) Multi Element */
 				port@2 { reg = <2>; smcodec2_ep: endpoint { remote-endpoint = <&codec13_ep>; };};/* (B) Multi Element */
 			};
+
+			/*
+			 * [Multi-CPU-1]
+			 *
+			 *		+---+		+---+
+			 *		|  X|<-@------->|x  |
+			 *		|   |		|   |
+			 *	cpu8 <--|A 1|<--------->|3 a|-> codec14
+			 *	cpu9 <--|B 2|<---+----->|4 b|-> codec15
+			 *		+---+	  \---->|5 c|-> codec16
+			 *				+---+
+			 */
+			ports@6 {
+				reg = <6>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+			mcpu1:	port@0 { reg = <0>; mcpu10_ep: endpoint { remote-endpoint = <&mcodec10_ep>; };};    /* (X) to pair */
+				port@1 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					reg = <1>;
+					mcpu11_ep:   endpoint@0 { reg = <0>; remote-endpoint = <&cpu8_ep>;       }; /* (A) Multi Element */
+					mcpu11_ep_0: endpoint@1 { reg = <1>; remote-endpoint = <&mcodec11_ep_0>; }; /* (1) connected Codec */
+				};
+				port@2 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					reg = <2>;
+					mcpu12_ep:   endpoint@0 { reg = <0>; remote-endpoint = <&cpu9_ep>;       }; /* (B) Multi Element */
+					mcpu12_ep_0: endpoint@1 { reg = <1>; remote-endpoint = <&mcodec12_ep_0>; }; /* (2) connected Codec */
+					mcpu12_ep_1: endpoint@2 { reg = <2>; remote-endpoint = <&mcodec13_ep_0>; }; /* (2) connected Codec */
+				};
+			};
+
+			/*
+			 * [Multi-Codec-1]
+			 *
+			 *		+---+		+---+
+			 *		|  X|<-@------->|x  |
+			 *		|   |		|   |
+			 *	cpu8 <--|A 1|<--------->|3 a|-> codec14
+			 *	cpu9 <--|B 2|<---+----->|4 b|-> codec15
+			 *		+---+	  \---->|5 c|-> codec16
+			 *				+---+
+			 */
+			ports@7 {
+				reg = <7>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+				port@0 { reg = <0>; mcodec10_ep: endpoint { remote-endpoint = <&mcpu10_ep>;  };};   /* (x) to pair */
+				port@1 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					reg = <1>;
+					mcodec11_ep:   endpoint@0 { reg = <0>; remote-endpoint = <&codec14_ep>;  }; /* (a) Multi Element */
+					mcodec11_ep_0: endpoint@1 { reg = <1>; remote-endpoint = <&mcpu11_ep_0>; }; /* (3) connected CPU */
+				};
+				port@2 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					reg = <2>;
+					mcodec12_ep:   endpoint@0 { reg = <0>; remote-endpoint = <&codec15_ep>;  }; /* (b) Multi Element */
+					mcodec12_ep_0: endpoint@1 { reg = <1>; remote-endpoint = <&mcpu12_ep_0>; }; /* (4) connected CPU */
+				};
+				port@3 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					reg = <3>;
+					mcodec13_ep:   endpoint@0 { reg = <0>; remote-endpoint = <&codec16_ep>;  }; /* (c) Multi Element */
+					mcodec13_ep_0: endpoint@1 { reg = <1>; remote-endpoint = <&mcpu12_ep_1>; }; /* (5) connected CPU */
+				};
+			};
+
+			/*
+			 * [Multi-CPU-2]
+			 *
+			 *		+---+		+---+
+			 *		|  X|<-@------->|x  |
+			 *		|   |		|   |
+			 *	cpu10 <-|A 1|<--------->|4 a|-> codec17
+			 *	cpu11 <-|B 2|<-----+--->|5 b|-> codec18
+			 *	cpu12 <-|C 3|<----/	+---+
+			 *		+---+
+			 */
+			ports@8 {
+				reg = <8>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+			mcpu2:	port@0 { reg = <0>; mcpu20_ep: endpoint { remote-endpoint = <&mcodec20_ep>; };};    /* (X) to pair */
+				port@1 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					reg = <1>;
+					mcpu21_ep:   endpoint@0 { reg = <0>; remote-endpoint = <&cpu10_ep>;      }; /* (A) Multi Element */
+					mcpu21_ep_0: endpoint@1 { reg = <1>; remote-endpoint = <&mcodec21_ep_0>; }; /* (1) connected Codec */
+				};
+				port@2 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					reg = <2>;
+					mcpu22_ep:   endpoint@0 { reg = <0>; remote-endpoint = <&cpu11_ep>;      }; /* (B) Multi Element */
+					mcpu22_ep_0: endpoint@1 { reg = <1>; remote-endpoint = <&mcodec22_ep_0>; }; /* (2) connected Codec */
+				};
+				port@3 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					reg = <3>;
+					mcpu23_ep:   endpoint@0 { reg = <0>; remote-endpoint = <&cpu12_ep>;      }; /* (C) Multi Element */
+					mcpu23_ep_0: endpoint@1 { reg = <1>; remote-endpoint = <&mcodec22_ep_1>; }; /* (3) connected Codec */
+				};
+			};
+
+			/*
+			 * [Multi-Codec-2]
+			 *
+			 *		+---+		+---+
+			 *		|  X|<-@------->|x  |
+			 *		|   |		|   |
+			 *	cpu10 <-|A 1|<--------->|4 a|-> codec17
+			 *	cpu11 <-|B 2|<-----+--->|5 b|-> codec18
+			 *	cpu12 <-|C 3|<----/	+---+
+			 *		+---+
+			 */
+			ports@9 {
+				reg = <9>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+				port@0 { reg = <0>; mcodec20_ep: endpoint { remote-endpoint = <&mcpu20_ep>;  };};   /* (x) to pair */
+				port@1 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					reg = <1>;
+					mcodec21_ep:   endpoint@0 { reg = <0>; remote-endpoint = <&codec17_ep>;  }; /* (a) Multi Element */
+					mcodec21_ep_0: endpoint@1 { reg = <1>; remote-endpoint = <&mcpu21_ep_0>; }; /* (4) connected CPU */
+				};
+				port@2 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					reg = <2>;
+					mcodec22_ep:   endpoint@0 { reg = <0>; remote-endpoint = <&codec18_ep>;  }; /* (b) Multi Element */
+					mcodec22_ep_0: endpoint@1 { reg = <1>; remote-endpoint = <&mcpu22_ep_0>; }; /* (5) connected CPU */
+					mcodec22_ep_1: endpoint@2 { reg = <2>; remote-endpoint = <&mcpu23_ep_0>; }; /* (5) connected CPU */
+				};
+			};
 		};
 
 		dpcm {
@@ -440,6 +624,14 @@ ports {
 
 			/* [Semi-Multi] */
 			sm0:  port@7 { reg = <7>; cpu7_ep: endpoint { remote-endpoint = <&smcodec0_ep>; }; };
+
+			/* [Multi-CPU-1] */
+			      port@8 { reg = <8>; cpu8_ep: endpoint { remote-endpoint = <&mcpu11_ep>;   }; };
+			      port@9 { reg = <9>; cpu9_ep: endpoint { remote-endpoint = <&mcpu12_ep>;   }; };
+			/* [Multi-CPU-2] */
+			      port@a { reg = <10>; cpu10_ep: endpoint { remote-endpoint = <&mcpu21_ep>; }; };
+			      port@b { reg = <11>; cpu11_ep: endpoint { remote-endpoint = <&mcpu22_ep>; }; };
+			      port@c { reg = <12>; cpu12_ep: endpoint { remote-endpoint = <&mcpu23_ep>; }; };
 		};
 	};
 
@@ -498,6 +690,13 @@ port@3  {
 			port@c { reg = <12>; codec12_ep: endpoint { remote-endpoint = <&smcodec1_ep>; }; };
 			port@d { reg = <13>; codec13_ep: endpoint { remote-endpoint = <&smcodec2_ep>; }; };
 
+			/* [Multi-Codec-1] */
+			port@e  { reg = <14>; codec14_ep: endpoint { remote-endpoint = <&mcodec11_ep>; }; };
+			port@f  { reg = <15>; codec15_ep: endpoint { remote-endpoint = <&mcodec12_ep>; }; };
+			port@10 { reg = <16>; codec16_ep: endpoint { remote-endpoint = <&mcodec13_ep>; }; };
+			/* [Multi-Codec-2] */
+			port@11 { reg = <17>; codec17_ep: endpoint { remote-endpoint = <&mcodec21_ep>; }; };
+			port@12 { reg = <18>; codec18_ep: endpoint { remote-endpoint = <&mcodec22_ep>; }; };
 		};
 	};
 };
-- 
2.25.1

Re: [PATCH v7 0/5] ASoC: makes CPU/Codec channel connection map more generic

[Mark Brown]

On Mon, 13 Nov 2023 01:27:50 +0000, Kuninori Morimoto wrote:
> Cc Bard, Pierre-Louis, Jerome, DT-ML
> 
> This is v7 patch-set.
> 
> Current ASoC is supporting CPU/Codec = N:M (N < M) connection by using
> ch_map idea. This patch-set expands it that all connection uses this idea,
> and no longer N < M limit [1][2].
> 
> [...]

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next

Thanks!

[1/5] ASoC: makes CPU/Codec channel connection map more generic
      commit: 45cc50d13433a62f23b7b4af380497aae5e8ddc7
[2/5] ASoC: audio-graph-card2: use better image for Multi connection
      commit: 912eb415631140c93ff5f05378411fec8e6a537f
[3/5] ASoC: audio-graph-card2: add CPU:Codec = N:M support
      commit: e2de6808df4ad5faa6106f7a80617921fdf5dff5
[4/5] ASoC: audio-graph-card2-custom-sample: Add connection image
      commit: a706366f93c37c6649acfe15a1ef9a80e25bace4
[5/5] ASoC: audio-graph-card2-custom-sample: add CPU/Codec = N:M sample
      commit: 792846d9daa876186196b66dc496a2ba8ddd7535

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark