ASoC: SOF: amd: Add Soundwire DAI configuration support for AMD platforms

Add support for configuring AMD Soundwire DAI from topology.

Signed-off-by: Vijendar Mukunda <[e-mail]>
Link: https://msgid.link/r/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

include/sound/sof/dai-amd.h

···
 	uint32_t pdm_ch;
 } __packed;
 
+/* ACP_SDW Configuration Request - SOF_IPC_DAI_AMD_SDW_CONFIG */
+struct sof_ipc_dai_acp_sdw_params {
+	struct sof_ipc_hdr hdr;
+	u32 rate;
+	u32 channels;
+} __packed;
+
 #endif

include/sound/sof/dai.h

···
 	SOF_DAI_AMD_SP_VIRTUAL,		/**< AMD ACP SP VIRTUAL */
 	SOF_DAI_AMD_HS_VIRTUAL,		/**< AMD ACP HS VIRTUAL */
 	SOF_DAI_IMX_MICFIL,		/** < i.MX MICFIL PDM */
+	SOF_DAI_AMD_SDW,		/**< AMD ACP SDW */
 };
 
 /* general purpose DAI configuration */
···
 		struct sof_ipc_dai_acp_params acphs;
 		struct sof_ipc_dai_mtk_afe_params afe;
 		struct sof_ipc_dai_micfil_params micfil;
+		struct sof_ipc_dai_acp_sdw_params acp_sdw;
 	};
 } __packed;
 

include/uapi/sound/sof/tokens.h

···
 #define SOF_TKN_IMX_MICFIL_RATE			2000
 #define SOF_TKN_IMX_MICFIL_CH			2001
 
+/* ACP SDW */
+#define SOF_TKN_AMD_ACP_SDW_RATE		2100
+#define SOF_TKN_AMD_ACP_SDW_CH			2101
+
 #endif

sound/soc/sof/ipc3-pcm.c

···
 		dev_dbg(component->dev, "MICFIL PDM channels_min: %d channels_max: %d\n",
 			channels->min, channels->max);
 		break;
+	case SOF_DAI_AMD_SDW:
+		/* change the default trigger sequence as per HW implementation */
+		for_each_dpcm_fe(rtd, SNDRV_PCM_STREAM_PLAYBACK, dpcm) {
+			struct snd_soc_pcm_runtime *fe = dpcm->fe;
+
+			fe->dai_link->trigger[SNDRV_PCM_STREAM_PLAYBACK] =
+					SND_SOC_DPCM_TRIGGER_POST;
+		}
+
+		for_each_dpcm_fe(rtd, SNDRV_PCM_STREAM_CAPTURE, dpcm) {
+			struct snd_soc_pcm_runtime *fe = dpcm->fe;
+
+			fe->dai_link->trigger[SNDRV_PCM_STREAM_CAPTURE] =
+					SND_SOC_DPCM_TRIGGER_POST;
+		}
+		rate->min = private->dai_config->acp_sdw.rate;
+		rate->max = private->dai_config->acp_sdw.rate;
+		channels->min = private->dai_config->acp_sdw.channels;
+		channels->max = private->dai_config->acp_sdw.channels;
+
+		dev_dbg(component->dev,
+			"AMD_SDW rate_min: %d rate_max: %d\n", rate->min, rate->max);
+		dev_dbg(component->dev, "AMD_SDW channels_min: %d channels_max: %d\n",
+			channels->min, channels->max);
+		break;
 	default:
 		dev_err(component->dev, "Invalid DAI type %d\n", private->dai_config->type);
 		break;

sound/soc/sof/ipc3-topology.c

···
 		offsetof(struct sof_ipc_dai_micfil_params, pdm_ch)},
 };
 
+/* ACP_SDW */
+static const struct sof_topology_token acp_sdw_tokens[] = {
+	{SOF_TKN_AMD_ACP_SDW_RATE, SND_SOC_TPLG_TUPLE_TYPE_WORD, get_token_u32,
+		offsetof(struct sof_ipc_dai_acp_sdw_params, rate)},
+	{SOF_TKN_AMD_ACP_SDW_CH, SND_SOC_TPLG_TUPLE_TYPE_WORD, get_token_u32,
+		offsetof(struct sof_ipc_dai_acp_sdw_params, channels)},
+};
+
 /* Core tokens */
 static const struct sof_topology_token core_tokens[] = {
 	{SOF_TKN_COMP_CORE_ID, SND_SOC_TPLG_TUPLE_TYPE_WORD, get_token_u32,
···
 	[SOF_ACPI2S_TOKENS]   = {"ACPI2S tokens", acpi2s_tokens, ARRAY_SIZE(acpi2s_tokens)},
 	[SOF_MICFIL_TOKENS] = {"MICFIL PDM tokens",
 		micfil_pdm_tokens, ARRAY_SIZE(micfil_pdm_tokens)},
+	[SOF_ACP_SDW_TOKENS]   = {"ACP_SDW tokens", acp_sdw_tokens, ARRAY_SIZE(acp_sdw_tokens)},
 };
 
 /**
···
 	return 0;
 }
 
+static int sof_link_acp_sdw_load(struct snd_soc_component *scomp, struct snd_sof_dai_link *slink,
+				 struct sof_ipc_dai_config *config, struct snd_sof_dai *dai)
+{
+	struct sof_dai_private_data *private = dai->private;
+	u32 size = sizeof(*config);
+	int ret;
+
+	/* parse the required set of ACP_SDW tokens based on num_hw_cfgs */
+	ret = sof_update_ipc_object(scomp, &config->acp_sdw, SOF_ACP_SDW_TOKENS, slink->tuples,
+				    slink->num_tuples, size, slink->num_hw_configs);
+	if (ret < 0)
+		return ret;
+
+	/* init IPC */
+	config->hdr.size = size;
+	dev_dbg(scomp->dev, "ACP SDW config rate %d channels %d\n",
+		config->acp_sdw.rate, config->acp_sdw.channels);
+
+	/* set config for all DAI's with name matching the link name */
+	dai->number_configs = 1;
+	dai->current_config = 0;
+	private->dai_config = kmemdup(config, size, GFP_KERNEL);
+	if (!private->dai_config)
+		return -ENOMEM;
+
+	return 0;
+}
+
 static int sof_link_afe_load(struct snd_soc_component *scomp, struct snd_sof_dai_link *slink,
 			     struct sof_ipc_dai_config *config, struct snd_sof_dai *dai)
 {
···
 			break;
 		case SOF_DAI_MEDIATEK_AFE:
 			ret = sof_link_afe_load(scomp, slink, config, dai);
+			break;
+		case SOF_DAI_AMD_SDW:
+			ret = sof_link_acp_sdw_load(scomp, slink, config, dai);
 			break;
 		default:
 			break;

sound/soc/sof/sof-audio.h

···
 	SOF_ACPDMIC_TOKENS,
 	SOF_ACPI2S_TOKENS,
 	SOF_MICFIL_TOKENS,
+	SOF_ACP_SDW_TOKENS,
 
 	/* this should be the last */
 	SOF_TOKEN_COUNT,

sound/soc/sof/topology.c

···
 	{"ACPSP_VIRTUAL", SOF_DAI_AMD_SP_VIRTUAL},
 	{"ACPHS_VIRTUAL", SOF_DAI_AMD_HS_VIRTUAL},
 	{"MICFIL", SOF_DAI_IMX_MICFIL},
+	{"ACP_SDW", SOF_DAI_AMD_SDW},
 
 };
 
···
 	case SOF_DAI_IMX_MICFIL:
 		token_id = SOF_MICFIL_TOKENS;
 		num_tuples += token_list[SOF_MICFIL_TOKENS].count;
+		break;
+	case SOF_DAI_AMD_SDW:
+		token_id = SOF_ACP_SDW_TOKENS;
+		num_tuples += token_list[SOF_ACP_SDW_TOKENS].count;
 		break;
 	default:
 		break;