ASoC: SOF: ipc4-topology: Handle output format special case

The current topologies have input/output formats in pairs and even
though there are multiple output formats, they are all the same. Handle
this case as if there were only one format in topology. Also, add a check
for the number of output formats and reports errors where applicable.

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
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com
Link: https://lore.kernel.org/r/20230515103336.16132-6-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org

sound/soc/sof/ipc4-topology.c

@@ -1033,10 +1033,37 @@ static int sof_ipc4_init_output_audio_fmt(struct snd_sof_dev *sdev,
 					  struct sof_ipc4_available_audio_format *available_fmt,
 					  int input_audio_format_index)
 {
+	struct sof_ipc4_audio_format *out_fmt;
+	u32 out_rate, out_channels, out_valid_bits;
+	bool single_format = true;
 	int i;
 
-	/* pick the only available output format */
-	if (available_fmt->num_output_formats == 1)
+	if (!available_fmt->num_output_formats)
+		return -EINVAL;
+
+	out_fmt = &available_fmt->output_pin_fmts[0].audio_fmt;
+	out_rate = out_fmt->sampling_frequency;
+	out_channels = SOF_IPC4_AUDIO_FORMAT_CFG_CHANNELS_COUNT(out_fmt->fmt_cfg);
+	out_valid_bits = SOF_IPC4_AUDIO_FORMAT_CFG_V_BIT_DEPTH(out_fmt->fmt_cfg);
+
+	/* check if all output formats in topology are the same */
+	for (i = 1; i < available_fmt->num_output_formats; i++) {
+		u32 _out_rate, _out_channels, _out_valid_bits;
+
+		out_fmt = &available_fmt->output_pin_fmts[i].audio_fmt;
+		_out_rate = out_fmt->sampling_frequency;
+		_out_channels = SOF_IPC4_AUDIO_FORMAT_CFG_CHANNELS_COUNT(out_fmt->fmt_cfg);
+		_out_valid_bits = SOF_IPC4_AUDIO_FORMAT_CFG_V_BIT_DEPTH(out_fmt->fmt_cfg);
+
+		if (_out_rate != out_rate || _out_channels != out_channels ||
+		    _out_valid_bits != out_valid_bits) {
+			single_format = false;
+			break;
+		}
+	}
+
+	/* pick the first format if there's only one available or if all formats are the same */
+	if (single_format)
 		i = 0;
 	else
 		i = input_audio_format_index;
@@ -1522,6 +1549,11 @@ sof_ipc4_prepare_copier_module(struct snd_sof_widget *swidget,
 
 	output_fmt_index = sof_ipc4_init_output_audio_fmt(sdev, &copier_data->base_config,
 							  available_fmt, ret);
+	if (output_fmt_index < 0) {
+		dev_err(sdev->dev, "No output formats in topology for copier %s",
+			swidget->widget->name);
+		return output_fmt_index;
+	}
 
 	/*
 	 * Set the output format. Current topology defines pin 0 input and output formats in pairs.
@@ -1700,7 +1732,11 @@ static int sof_ipc4_prepare_gain_module(struct snd_sof_widget *swidget,
 	if (ret < 0)
 		return ret;
 
-	sof_ipc4_init_output_audio_fmt(sdev, &gain->base_config, available_fmt, ret);
+	ret = sof_ipc4_init_output_audio_fmt(sdev, &gain->base_config, available_fmt, ret);
+	if (ret < 0) {
+		dev_err(sdev->dev, "No output formats for %s", swidget->widget->name);
+		return ret;
+	}
 
 	/* update pipeline memory usage */
 	sof_ipc4_update_pipeline_mem_usage(sdev, swidget, &gain->base_config);
@@ -1726,7 +1762,11 @@ static int sof_ipc4_prepare_mixer_module(struct snd_sof_widget *swidget,
 	if (ret < 0)
 		return ret;
 
-	sof_ipc4_init_output_audio_fmt(sdev, &mixer->base_config, available_fmt, ret);
+	ret = sof_ipc4_init_output_audio_fmt(sdev, &mixer->base_config, available_fmt, ret);
+	if (ret < 0) {
+		dev_err(sdev->dev, "No output formats for %s", swidget->widget->name);
+		return ret;
+	}
 
 	/* update pipeline memory usage */
 	sof_ipc4_update_pipeline_mem_usage(sdev, swidget, &mixer->base_config);
@@ -1753,7 +1793,11 @@ static int sof_ipc4_prepare_src_module(struct snd_sof_widget *swidget,
 	if (ret < 0)
 		return ret;
 
-	sof_ipc4_init_output_audio_fmt(sdev, &src->base_config, available_fmt, ret);
+	ret = sof_ipc4_init_output_audio_fmt(sdev, &src->base_config, available_fmt, ret);
+	if (ret < 0) {
+		dev_err(sdev->dev, "No output formats for %s", swidget->widget->name);
+		return ret;
+	}
 
 	/* update pipeline memory usage */
 	sof_ipc4_update_pipeline_mem_usage(sdev, swidget, &src->base_config);
@@ -1864,6 +1908,7 @@ static int sof_ipc4_prepare_process_module(struct snd_sof_widget *swidget,
 	if (ret < 0)
 		return ret;
 
+	/* No need to check the return value. Some processing modules do not have output pins */
 	output_fmt_index = sof_ipc4_init_output_audio_fmt(sdev, &process->base_config,
 							  available_fmt, ret);