ASoC: SOF: Add support for configuring PDM interface from topology

Currently we only support configuration for number of channels and
sample rate.

Reviewed-by: Péter Ujfalusi <[e-mail]>
Reviewed-by: Iuliana Prodan <[e-mail]>
Signed-off-by: Daniel Baluta <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

include/sound/sof/dai-imx.h

···
 	uint16_t tdm_slot_width;
 	uint16_t reserved2;	/* alignment */
 } __packed;
+
+/* MICFIL Configuration Request - SOF_IPC_DAI_MICFIL_CONFIG */
+struct sof_ipc_dai_micfil_params {
+	uint32_t pdm_rate;
+	uint32_t pdm_ch;
+} __packed;
+
 #endif

include/sound/sof/dai.h

···
 	SOF_DAI_AMD_HS,			/**< Amd HS */
 	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 */
 };
 
 /* general purpose DAI configuration */
···
 		struct sof_ipc_dai_acpdmic_params acpdmic;
 		struct sof_ipc_dai_acp_params acphs;
 		struct sof_ipc_dai_mtk_afe_params afe;
+		struct sof_ipc_dai_micfil_params micfil;
 	};
 } __packed;
 

include/uapi/sound/sof/tokens.h

···
 #define SOF_TKN_AMD_ACPI2S_CH			1701
 #define SOF_TKN_AMD_ACPI2S_TDM_MODE		1702
 
+/* MICFIL PDM */
+#define SOF_TKN_IMX_MICFIL_RATE			2000
+#define SOF_TKN_IMX_MICFIL_CH			2001
+
 #endif

sound/soc/sof/ipc3-pcm.c

···
 		dev_dbg(component->dev, "AMD_DMIC channels_min: %d channels_max: %d\n",
 			channels->min, channels->max);
 		break;
+	case SOF_DAI_IMX_MICFIL:
+		rate->min = private->dai_config->micfil.pdm_rate;
+		rate->max = private->dai_config->micfil.pdm_rate;
+		channels->min = private->dai_config->micfil.pdm_ch;
+		channels->max = private->dai_config->micfil.pdm_ch;
+
+		dev_dbg(component->dev,
+			"MICFIL PDM rate_min: %d rate_max: %d\n", rate->min, rate->max);
+		dev_dbg(component->dev, "MICFIL PDM 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_acp_params, tdm_mode)},
 };
 
+/* MICFIL PDM */
+static const struct sof_topology_token micfil_pdm_tokens[] = {
+	{SOF_TKN_IMX_MICFIL_RATE,
+		SND_SOC_TPLG_TUPLE_TYPE_WORD, get_token_u32,
+		offsetof(struct sof_ipc_dai_micfil_params, pdm_rate)},
+	{SOF_TKN_IMX_MICFIL_CH,
+		SND_SOC_TPLG_TUPLE_TYPE_WORD, get_token_u32,
+		offsetof(struct sof_ipc_dai_micfil_params, pdm_ch)},
+};
+
 /* 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_AFE_TOKENS] = {"AFE tokens", afe_tokens, ARRAY_SIZE(afe_tokens)},
 	[SOF_ACPDMIC_TOKENS] = {"ACPDMIC tokens", acpdmic_tokens, ARRAY_SIZE(acpdmic_tokens)},
 	[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)},
 };
 
 /**
···
 	return 0;
 }
 
+static int sof_link_micfil_load(struct snd_soc_component *scomp, struct snd_sof_dai_link *slink,
+				struct sof_ipc_dai_config *config, struct snd_sof_dai *dai)
+{
+	struct snd_soc_tplg_hw_config *hw_config = slink->hw_configs;
+	struct sof_dai_private_data *private = dai->private;
+	u32 size = sizeof(*config);
+	int ret;
+
+       /* handle master/slave and inverted clocks */
+	sof_dai_set_format(hw_config, config);
+
+	config->hdr.size = size;
+
+	/* parse the required set of MICFIL PDM tokens based on num_hw_cfgs */
+	ret = sof_update_ipc_object(scomp, &config->micfil, SOF_MICFIL_TOKENS, slink->tuples,
+				    slink->num_tuples, size, slink->num_hw_configs);
+	if (ret < 0)
+		return ret;
+
+	dev_info(scomp->dev, "MICFIL PDM config dai_index %d channel %d rate %d\n",
+		 config->dai_index, config->micfil.pdm_ch, config->micfil.pdm_rate);
+
+	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_acp_dmic_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_IMX_ESAI:
 			ret = sof_link_esai_load(scomp, slink, config, dai);
+			break;
+		case SOF_DAI_IMX_MICFIL:
+			ret = sof_link_micfil_load(scomp, slink, config, dai);
 			break;
 		case SOF_DAI_AMD_BT:
 			ret = sof_link_acp_bt_load(scomp, slink, config, dai);

sound/soc/sof/sof-audio.h

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

sound/soc/sof/topology.c

···
 	{"AFE", SOF_DAI_MEDIATEK_AFE},
 	{"ACPSP_VIRTUAL", SOF_DAI_AMD_SP_VIRTUAL},
 	{"ACPHS_VIRTUAL", SOF_DAI_AMD_HS_VIRTUAL},
+	{"MICFIL", SOF_DAI_IMX_MICFIL},
 
 };
 
···
 	case SOF_DAI_AMD_HS_VIRTUAL:
 		token_id = SOF_ACPI2S_TOKENS;
 		num_tuples += token_list[SOF_ACPI2S_TOKENS].count;
+		break;
+	case SOF_DAI_IMX_MICFIL:
+		token_id = SOF_MICFIL_TOKENS;
+		num_tuples += token_list[SOF_MICFIL_TOKENS].count;
 		break;
 	default:
 		break;