ASoC: SOF: ipc4-topology: Store the params change between input/output of a module

Based on the input and output formats we can evaluate what param might be
changed by the module instance.
If there is a difference between the input rate/channels/format and the
output  rate/channels/format it means that the module can change one or
multiple of the params.

Store this information during init for later use.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>

Author: ujfalusi

sound/soc/sof/ipc4-topology.c

@@ -406,6 +406,39 @@ sof_ipc4_get_input_pin_audio_fmt(struct snd_sof_widget *swidget, int pin_index)
 	return NULL;
 }
 
+static void
+sof_ipc4_evaluate_params_change(struct sof_ipc4_available_audio_format *available_fmt)
+{
+	struct sof_ipc4_audio_format *fmt;
+	u32 in_rate, in_channels, in_valid_bits;
+	u32 out_rate, out_channels, out_valid_bits;
+	u32 changed_params = 0;
+	int i, j;
+
+	for (i = 0; i < available_fmt->num_input_formats; i++) {
+		fmt = &available_fmt->input_pin_fmts[i].audio_fmt;
+		in_rate = fmt->sampling_frequency;
+		in_channels = SOF_IPC4_AUDIO_FORMAT_CFG_CHANNELS_COUNT(fmt->fmt_cfg);
+		in_valid_bits = SOF_IPC4_AUDIO_FORMAT_CFG_V_BIT_DEPTH(fmt->fmt_cfg);
+
+		for (j = 0; j < available_fmt->num_output_formats; j++) {
+			fmt = &available_fmt->output_pin_fmts[j].audio_fmt;
+			out_rate = fmt->sampling_frequency;
+			out_channels = SOF_IPC4_AUDIO_FORMAT_CFG_CHANNELS_COUNT(fmt->fmt_cfg);
+			out_valid_bits = SOF_IPC4_AUDIO_FORMAT_CFG_V_BIT_DEPTH(fmt->fmt_cfg);
+
+			if (in_rate != out_rate)
+				changed_params |= BIT(SNDRV_PCM_HW_PARAM_RATE);
+			if (in_channels != out_channels)
+				changed_params |= BIT(SNDRV_PCM_HW_PARAM_CHANNELS);
+			if (in_valid_bits != out_valid_bits)
+				changed_params |= BIT(SNDRV_PCM_HW_PARAM_FORMAT);
+		}
+	}
+
+	available_fmt->changed_params = changed_params;
+}
+
 /**
  * sof_ipc4_get_audio_fmt - get available audio formats from swidget->tuples
  * @scomp: pointer to pointer to SOC component
@@ -497,6 +530,8 @@ static int sof_ipc4_get_audio_fmt(struct snd_soc_component *scomp,
 					  available_fmt->num_output_formats);
 	}
 
+	sof_ipc4_evaluate_params_change(available_fmt);
+
 	return 0;
 
 err_out:
@@ -661,6 +696,9 @@ static int sof_ipc4_widget_setup_pcm(struct snd_sof_widget *swidget)
 	if (ret)
 		goto free_copier;
 
+	/* Copier can only change format */
+	available_fmt->changed_params &= BIT(SNDRV_PCM_HW_PARAM_FORMAT);
+
 	/*
 	 * This callback is used by host copier and module-to-module copier,
 	 * and only host copier needs to set gtw_cfg.
@@ -789,6 +827,9 @@ static int sof_ipc4_widget_setup_comp_dai(struct snd_sof_widget *swidget)
 	if (ret)
 		goto free_copier;
 
+	/* Copier can only change format */
+	available_fmt->changed_params &= BIT(SNDRV_PCM_HW_PARAM_FORMAT);
+
 	ret = sof_update_ipc_object(scomp, &node_type,
 				    SOF_COPIER_TOKENS, swidget->tuples,
 				    swidget->num_tuples, sizeof(node_type), 1);

sound/soc/sof/ipc4-topology.h

@@ -197,12 +197,15 @@ struct sof_ipc4_pin_format {
  * @input_pin_fmts: Available input pin formats
  * @num_input_formats: Number of input pin formats
  * @num_output_formats: Number of output pin formats
+ * @changed_params: Mask of changed params by the module instance between it's
+ *		    input and output formts (rate, channels, depth)
  */
 struct sof_ipc4_available_audio_format {
 	struct sof_ipc4_pin_format *output_pin_fmts;
 	struct sof_ipc4_pin_format *input_pin_fmts;
 	u32 num_input_formats;
 	u32 num_output_formats;
+	u32 changed_params;
 };
 
 /**