ASoC: SOF: Intel: hda-dai: Introduce DAI widget ops

Introduce a new ops structure for HDA DAI widget DMA ops and add a new
field to struct snd_sof_dai that will be used to set the ops pointer for
DAI widgets.
Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/20230307140435.2808-8-peter.ujfalusi@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/intel/hda.h

@@ -928,4 +928,35 @@ extern struct sdw_intel_ops sdw_callback;
 struct sof_ipc4_fw_library;
 int hda_dsp_ipc4_load_library(struct snd_sof_dev *sdev,
 			      struct sof_ipc4_fw_library *fw_lib, bool reload);
+
+/**
+ * struct hda_dai_widget_dma_ops - DAI DMA ops optional by default unless specified otherwise
+ * @get_hext_stream: Mandatory function pointer to get the saved pointer to struct hdac_ext_stream
+ * @assign_hext_stream: Function pointer to assign a hdac_ext_stream
+ * @release_hext_stream: Function pointer to release the hdac_ext_stream
+ * @setup_hext_stream: Function pointer for hdac_ext_stream setup
+ * @reset_hext_stream: Function pointer for hdac_ext_stream reset
+ * @pre_trigger: Function pointer for DAI DMA pre-trigger actions
+ * @trigger: Function pointer for DAI DMA trigger actions
+ * @post_trigger: Function pointer for DAI DMA post-trigger actions
+ */
+struct hda_dai_widget_dma_ops {
+	struct hdac_ext_stream *(*get_hext_stream)(struct snd_sof_dev *sdev,
+						   struct snd_soc_dai *cpu_dai,
+						   struct snd_pcm_substream *substream);
+	struct hdac_ext_stream *(*assign_hext_stream)(struct snd_sof_dev *sdev,
+						      struct snd_soc_dai *cpu_dai,
+						      struct snd_pcm_substream *substream);
+	void (*release_hext_stream)(struct snd_sof_dev *sdev, struct snd_soc_dai *cpu_dai,
+				    struct snd_pcm_substream *substream);
+	void (*setup_hext_stream)(struct snd_sof_dev *sdev, struct hdac_ext_stream *hext_stream,
+				  unsigned int format_val);
+	void (*reset_hext_stream)(struct snd_sof_dev *sdev, struct hdac_ext_stream *hext_sream);
+	int (*pre_trigger)(struct snd_sof_dev *sdev, struct snd_soc_dai *cpu_dai,
+			   struct snd_pcm_substream *substream, int cmd);
+	int (*trigger)(struct snd_sof_dev *sdev, struct snd_soc_dai *cpu_dai,
+		       struct snd_pcm_substream *substream, int cmd);
+	int (*post_trigger)(struct snd_sof_dev *sdev, struct snd_soc_dai *cpu_dai,
+			    struct snd_pcm_substream *substream, int cmd);
+};
 #endif

sound/soc/sof/sof-audio.h

@@ -502,6 +502,8 @@ struct snd_sof_dai {
 	int number_configs;
 	int current_config;
 	struct list_head list;	/* list in sdev dai list */
+	/* core should not touch this */
+	const void *platform_private;
 	void *private;
 };