ASoC: Intel: add get_codec_dai_by_name helper function

Currently, we assume the codecs in a dai link are all the same.
So that we get codec dai with snd_soc_rtd_to_codec(rtd, 0) in dai_links
->init callback. However, a link can include different codecs.
For example, a 4 speakers link can consist of rt712 and rt1316.
Therefore, we need to select the codec dai by name in the dai link.
Reviewed-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20240208165545.93811-11-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/boards/sof_board_helpers.c

@@ -584,6 +584,24 @@ int sof_intel_board_set_dai_link(struct device *dev, struct snd_soc_card *card,
 }
 EXPORT_SYMBOL_NS(sof_intel_board_set_dai_link, SND_SOC_INTEL_SOF_BOARD_HELPERS);
 
+struct snd_soc_dai *get_codec_dai_by_name(struct snd_soc_pcm_runtime *rtd,
+					  const char *dai_name[], int num_dais)
+{
+	struct snd_soc_dai *dai;
+	int index;
+	int i;
+
+	for (index = 0; index < num_dais; index++)
+		for_each_rtd_codec_dais(rtd, i, dai)
+			if (strstr(dai->name, dai_name[index])) {
+				dev_dbg(rtd->card->dev, "get dai %s\n", dai->name);
+				return dai;
+			}
+
+	return NULL;
+}
+EXPORT_SYMBOL_NS(get_codec_dai_by_name, SND_SOC_INTEL_SOF_BOARD_HELPERS);
+
 MODULE_DESCRIPTION("ASoC Intel SOF Machine Driver Board Helpers");
 MODULE_AUTHOR("Brent Lu <brent.lu@intel.com>");
 MODULE_LICENSE("GPL");

sound/soc/intel/boards/sof_board_helpers.h

@@ -118,4 +118,7 @@ int sof_intel_board_set_hdmi_in_link(struct device *dev,
 				     struct snd_soc_dai_link *link, int be_id,
 				     int ssp_hdmi);
 
+struct snd_soc_dai *get_codec_dai_by_name(struct snd_soc_pcm_runtime *rtd,
+					  const char *dai_name[], int num_dais);
+
 #endif /* __SOF_INTEL_BOARD_HELPERS_H */