ASoC: SOF: Intel: hda-mlink: add helpers to retrieve DMIC/SSP hlink

Small helpers to make DAI ops simpler.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20230404104127.5629-17-peter.ujfalusi@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

include/sound/hda-mlink.h

@@ -7,6 +7,7 @@
  */
 
 struct hdac_bus;
+struct hdac_ext_link;
 
 #if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_MLINK)
 
@@ -48,6 +49,9 @@ void hda_bus_ml_reset_losidv(struct hdac_bus *bus);
 int hda_bus_ml_resume(struct hdac_bus *bus);
 int hda_bus_ml_suspend(struct hdac_bus *bus);
 
+struct hdac_ext_link *hdac_bus_eml_ssp_get_hlink(struct hdac_bus *bus);
+struct hdac_ext_link *hdac_bus_eml_dmic_get_hlink(struct hdac_bus *bus);
+
 #else
 
 static inline int
@@ -141,4 +145,10 @@ static inline void hda_bus_ml_reset_losidv(struct hdac_bus *bus) { }
 static inline int hda_bus_ml_resume(struct hdac_bus *bus) { return 0; }
 static inline int hda_bus_ml_suspend(struct hdac_bus *bus) { return 0; }
 
+static inline struct hdac_ext_link *
+hdac_bus_eml_ssp_get_hlink(struct hdac_bus *bus) { return NULL; }
+
+static inline struct hdac_ext_link *
+hdac_bus_eml_dmic_get_hlink(struct hdac_bus *bus) { return NULL; }
+
 #endif /* CONFIG_SND_SOC_SOF_HDA */

sound/soc/sof/intel/hda-mlink.c

@@ -788,6 +788,30 @@ int hda_bus_ml_suspend(struct hdac_bus *bus)
 }
 EXPORT_SYMBOL_NS(hda_bus_ml_suspend, SND_SOC_SOF_HDA_MLINK);
 
+struct hdac_ext_link *hdac_bus_eml_ssp_get_hlink(struct hdac_bus *bus)
+{
+	struct hdac_ext2_link *h2link;
+
+	h2link = find_ext2_link(bus, true, AZX_REG_ML_LEPTR_ID_INTEL_SSP);
+	if (!h2link)
+		return NULL;
+
+	return &h2link->hext_link;
+}
+EXPORT_SYMBOL_NS(hdac_bus_eml_ssp_get_hlink, SND_SOC_SOF_HDA_MLINK);
+
+struct hdac_ext_link *hdac_bus_eml_dmic_get_hlink(struct hdac_bus *bus)
+{
+	struct hdac_ext2_link *h2link;
+
+	h2link = find_ext2_link(bus, true, AZX_REG_ML_LEPTR_ID_INTEL_DMIC);
+	if (!h2link)
+		return NULL;
+
+	return &h2link->hext_link;
+}
+EXPORT_SYMBOL_NS(hdac_bus_eml_dmic_get_hlink, SND_SOC_SOF_HDA_MLINK);
+
 #endif
 
 MODULE_LICENSE("Dual BSD/GPL");