ASoC: SOF: ipc4-topology: Modify the reference output valid_bits for copier

If the copier has only output valid_bits across all its output
formats, the reference for selecting the output format must be set that
instead of the valid_bits from the selected input format.
Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Seppo Ingalsuo <seppo.ingalsuo@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/20230821113629.5017-5-peter.ujfalusi@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/ipc4-topology.c

@@ -1349,6 +1349,31 @@ static int snd_sof_get_nhlt_endpoint_data(struct snd_sof_dev *sdev, struct snd_s
 }
 #endif
 
+static bool sof_ipc4_copier_is_single_format(struct snd_sof_dev *sdev,
+					     struct sof_ipc4_pin_format *pin_fmts,
+					     u32 pin_fmts_size)
+{
+	struct sof_ipc4_audio_format *fmt;
+	u32 valid_bits;
+	int i;
+
+	fmt = &pin_fmts[0].audio_fmt;
+	valid_bits = SOF_IPC4_AUDIO_FORMAT_CFG_V_BIT_DEPTH(fmt->fmt_cfg);
+
+	/* check if all output formats in topology are the same */
+	for (i = 1; i < pin_fmts_size; i++) {
+		u32 _valid_bits;
+
+		fmt = &pin_fmts[i].audio_fmt;
+		_valid_bits = SOF_IPC4_AUDIO_FORMAT_CFG_V_BIT_DEPTH(fmt->fmt_cfg);
+
+		if (_valid_bits != valid_bits)
+			return false;
+	}
+
+	return true;
+}
+
 static int
 sof_ipc4_prepare_copier_module(struct snd_sof_widget *swidget,
 			       struct snd_pcm_hw_params *fe_params,
@@ -1371,6 +1396,7 @@ sof_ipc4_prepare_copier_module(struct snd_sof_widget *swidget,
 	u32 out_ref_rate, out_ref_channels;
 	u32 deep_buffer_dma_ms = 0;
 	int output_fmt_index;
+	bool single_output_format;
 
 	dev_dbg(sdev->dev, "copier %s, type %d", swidget->widget->name, swidget->id);
 
@@ -1504,6 +1530,9 @@ sof_ipc4_prepare_copier_module(struct snd_sof_widget *swidget,
 		return ret;
 
 	/* set the reference params for output format selection */
+	single_output_format = sof_ipc4_copier_is_single_format(sdev,
+								available_fmt->output_pin_fmts,
+								available_fmt->num_output_formats);
 	switch (swidget->id) {
 	case snd_soc_dapm_aif_in:
 	case snd_soc_dapm_dai_out:
@@ -1514,17 +1543,21 @@ sof_ipc4_prepare_copier_module(struct snd_sof_widget *swidget,
 		in_fmt = &available_fmt->input_pin_fmts[ret].audio_fmt;
 		out_ref_rate = in_fmt->sampling_frequency;
 		out_ref_channels = SOF_IPC4_AUDIO_FORMAT_CFG_CHANNELS_COUNT(in_fmt->fmt_cfg);
-		out_ref_valid_bits = SOF_IPC4_AUDIO_FORMAT_CFG_V_BIT_DEPTH(in_fmt->fmt_cfg);
+
+		if (!single_output_format)
+			out_ref_valid_bits =
+				SOF_IPC4_AUDIO_FORMAT_CFG_V_BIT_DEPTH(in_fmt->fmt_cfg);
 		break;
 	}
 	case snd_soc_dapm_aif_out:
 	case snd_soc_dapm_dai_in:
+		out_ref_rate = params_rate(fe_params);
+		out_ref_channels = params_channels(fe_params);
+		if (!single_output_format) {
 			out_ref_valid_bits = sof_ipc4_get_valid_bits(sdev, fe_params);
 			if (out_ref_valid_bits < 0)
 				return out_ref_valid_bits;
-
-		out_ref_rate = params_rate(fe_params);
-		out_ref_channels = params_channels(fe_params);
+		}
 		break;
 	default:
 		/*
@@ -1534,6 +1567,21 @@ sof_ipc4_prepare_copier_module(struct snd_sof_widget *swidget,
 		return -EINVAL;
 	}
 
+	/*
+	 * if the output format is the same across all available output formats, choose
+	 * that as the reference.
+	 */
+	if (single_output_format) {
+		struct sof_ipc4_audio_format *out_fmt;
+
+		out_fmt = &available_fmt->output_pin_fmts[0].audio_fmt;
+		out_ref_valid_bits =
+			SOF_IPC4_AUDIO_FORMAT_CFG_V_BIT_DEPTH(out_fmt->fmt_cfg);
+	}
+
+	dev_dbg(sdev->dev, "copier %s: reference output rate %d, channels %d valid_bits %d\n",
+		swidget->widget->name, out_ref_rate, out_ref_channels, out_ref_valid_bits);
+
 	output_fmt_index = sof_ipc4_init_output_audio_fmt(sdev, &copier_data->base_config,
 							  available_fmt, out_ref_rate,
 							  out_ref_channels, out_ref_valid_bits);