ASoC: SOF: topology: initial support for Intel ALH DAI type

The Audio Link Hub DAI does not require any static configuration from
topology for now. We still need to pass the frame rate and format to
firmware.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20190815192018.30570-4-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/topology.c

@@ -346,6 +346,7 @@ static const struct sof_dai_types sof_dais[] = {
 	{"SSP", SOF_DAI_INTEL_SSP},
 	{"HDA", SOF_DAI_INTEL_HDA},
 	{"DMIC", SOF_DAI_INTEL_DMIC},
+	{"ALH", SOF_DAI_INTEL_ALH},
 	{"SAI", SOF_DAI_IMX_SAI},
 	{"ESAI", SOF_DAI_IMX_ESAI},
 };
@@ -2763,6 +2764,40 @@ static int sof_link_hda_load(struct snd_soc_component *scomp, int index,
 	return ret;
 }
 
+static int sof_link_alh_load(struct snd_soc_component *scomp, int index,
+			     struct snd_soc_dai_link *link,
+			     struct snd_soc_tplg_link_config *cfg,
+			     struct snd_soc_tplg_hw_config *hw_config,
+			     struct sof_ipc_dai_config *config)
+{
+	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(scomp);
+	struct sof_ipc_reply reply;
+	u32 size = sizeof(*config);
+	int ret;
+
+	/* init IPC */
+	config->hdr.size = size;
+
+	/* send message to DSP */
+	ret = sof_ipc_tx_message(sdev->ipc,
+				 config->hdr.cmd, config, size, &reply,
+				 sizeof(reply));
+
+	if (ret < 0) {
+		dev_err(sdev->dev, "error: failed to set DAI config for ALH %d\n",
+			config->dai_index);
+		return ret;
+	}
+
+	/* set config for all DAI's with name matching the link name */
+	ret = sof_set_dai_config(sdev, size, link, config);
+	if (ret < 0)
+		dev_err(sdev->dev, "error: failed to save DAI config for ALH %d\n",
+			config->dai_index);
+
+	return ret;
+}
+
 /* DAI link - used for any driver specific init */
 static int sof_link_load(struct snd_soc_component *scomp, int index,
 			 struct snd_soc_dai_link *link,
@@ -2859,6 +2894,10 @@ static int sof_link_load(struct snd_soc_component *scomp, int index,
 		ret = sof_link_hda_load(scomp, index, link, cfg, hw_config,
 					&config);
 		break;
+	case SOF_DAI_INTEL_ALH:
+		ret = sof_link_alh_load(scomp, index, link, cfg, hw_config,
+					&config);
+		break;
 	case SOF_DAI_IMX_SAI:
 		ret = sof_link_sai_load(scomp, index, link, cfg, hw_config,
 					&config);
@@ -2924,7 +2963,8 @@ static int sof_link_unload(struct snd_soc_component *scomp,
 	switch (sof_dai->dai_config->type) {
 	case SOF_DAI_INTEL_SSP:
 	case SOF_DAI_INTEL_DMIC:
-		/* no resource needs to be released for SSP and DMIC */
+	case SOF_DAI_INTEL_ALH:
+		/* no resource needs to be released for SSP, DMIC and ALH */
 		break;
 	case SOF_DAI_INTEL_HDA:
 		ret = sof_link_hda_unload(sdev, link);