1 files changed, 74 insertions, 13 deletions

diff --git a/sound/soc/sdw_utils/soc_sdw_cs_amp.c b/sound/soc/sdw_utils/soc_sdw_cs_amp.c
index 58b059b68016..325ab7230481 100644
--- a/sound/soc/sdw_utils/soc_sdw_cs_amp.c
+++ b/sound/soc/sdw_utils/soc_sdw_cs_amp.c
@@ -14,39 +14,100 @@
 #include <sound/soc-dai.h>
 #include <sound/soc_sdw_utils.h>
 
-#define CODEC_NAME_SIZE	8
+#define CS_AMP_CHANNELS_PER_AMP	4
+#define CS35L56_SPK_VOLUME_0DB 400 /* 0dB Max */
+
+int asoc_sdw_cs35l56_volume_limit(struct snd_soc_card *card, const char *name_prefix)
+{
+	char *volume_ctl_name;
+	int ret;
+
+	volume_ctl_name = kasprintf(GFP_KERNEL, "%s Speaker Volume", name_prefix);
+	if (!volume_ctl_name)
+		return -ENOMEM;
+
+	ret = snd_soc_limit_volume(card, volume_ctl_name, CS35L56_SPK_VOLUME_0DB);
+	if (ret)
+		dev_err(card->dev, "%s limit set failed: %d\n", volume_ctl_name, ret);
+
+	kfree(volume_ctl_name);
+	return ret;
+}
+EXPORT_SYMBOL_NS(asoc_sdw_cs35l56_volume_limit, "SND_SOC_SDW_UTILS");
 
 int asoc_sdw_cs_spk_rtd_init(struct snd_soc_pcm_runtime *rtd, struct snd_soc_dai *dai)
 {
-	const char *dai_name = rtd->dai_link->codecs->dai_name;
 	struct snd_soc_card *card = rtd->card;
-	char codec_name[CODEC_NAME_SIZE];
+	struct snd_soc_dapm_context *dapm = snd_soc_card_to_dapm(card);
 	char widget_name[16];
 	struct snd_soc_dapm_route route = { "Speaker", NULL, widget_name };
 	struct snd_soc_dai *codec_dai;
 	int i, ret;
 
-	snprintf(codec_name, CODEC_NAME_SIZE, "%s", dai_name);
-	card->components = devm_kasprintf(card->dev, GFP_KERNEL,
-					  "%s spk:%s",
-					  card->components, codec_name);
-	if (!card->components)
-		return -ENOMEM;
-
 	for_each_rtd_codec_dais(rtd, i, codec_dai) {
 		if (!strstr(codec_dai->name, "cs35l56"))
 			continue;
 
 		snprintf(widget_name, sizeof(widget_name), "%s SPK",
 			 codec_dai->component->name_prefix);
-		ret = snd_soc_dapm_add_routes(&card->dapm, &route, 1);
+
+		ret = asoc_sdw_cs35l56_volume_limit(card, codec_dai->component->name_prefix);
 		if (ret)
 			return ret;
+
+		ret = snd_soc_dapm_add_routes(dapm, &route, 1);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_NS(asoc_sdw_cs_spk_rtd_init, "SND_SOC_SDW_UTILS");
+
+int asoc_sdw_cs_spk_feedback_rtd_init(struct snd_soc_pcm_runtime *rtd, struct snd_soc_dai *dai)
+{
+	const struct snd_soc_dai_link *dai_link = rtd->dai_link;
+	const struct snd_soc_dai_link_ch_map *ch_map;
+	const struct snd_soc_dai_link_component *codec_dlc;
+	struct snd_soc_dai *codec_dai;
+	u8 ch_slot[8] = {};
+	unsigned int amps_per_bus, ch_per_amp, mask;
+	int i, ret;
+
+	WARN_ON(dai_link->num_cpus > ARRAY_SIZE(ch_slot));
+
+	/*
+	 * CS35L56 has 4 TX channels. When the capture is aggregated the
+	 * same bus slots will be allocated to all the amps on a bus. Only
+	 * one amp on that bus can be transmitting in each slot so divide
+	 * the available 4 slots between all the amps on a bus.
+	 */
+	amps_per_bus = dai_link->num_codecs / dai_link->num_cpus;
+	if ((amps_per_bus == 0) || (amps_per_bus > CS_AMP_CHANNELS_PER_AMP)) {
+		dev_err(rtd->card->dev, "Illegal num_codecs:%u / num_cpus:%u\n",
+			dai_link->num_codecs, dai_link->num_cpus);
+		return -EINVAL;
+	}
+
+	ch_per_amp = CS_AMP_CHANNELS_PER_AMP / amps_per_bus;
+
+	for_each_rtd_ch_maps(rtd, i, ch_map) {
+		codec_dlc = snd_soc_link_to_codec(rtd->dai_link, i);
+		codec_dai = snd_soc_find_dai(codec_dlc);
+		mask = GENMASK(ch_per_amp - 1, 0) << ch_slot[ch_map->cpu];
+
+		ret = snd_soc_dai_set_tdm_slot(codec_dai, 0, mask, 4, 32);
+		if (ret < 0) {
+			dev_err(rtd->card->dev, "Failed to set TDM slot:%d\n", ret);
+			return ret;
+		}
+
+		ch_slot[ch_map->cpu] += ch_per_amp;
 	}
 
 	return 0;
 }
-EXPORT_SYMBOL_NS(asoc_sdw_cs_spk_rtd_init, SND_SOC_SDW_UTILS);
+EXPORT_SYMBOL_NS(asoc_sdw_cs_spk_feedback_rtd_init, "SND_SOC_SDW_UTILS");
 
 int asoc_sdw_cs_amp_init(struct snd_soc_card *card,
 			 struct snd_soc_dai_link *dai_links,
@@ -61,4 +122,4 @@ int asoc_sdw_cs_amp_init(struct snd_soc_card *card,
 
 	return 0;
 }
-EXPORT_SYMBOL_NS(asoc_sdw_cs_amp_init, SND_SOC_SDW_UTILS);
+EXPORT_SYMBOL_NS(asoc_sdw_cs_amp_init, "SND_SOC_SDW_UTILS");