ASoC: SOF: ipc4-topology: update pipeline_params in process prepare

Some modules may modify the audio format during processing. So, update the
pipeline params based on pin 0's output format during process prepare.

Signed-off-by: Libin Yang <libin.yang@intel.com>
Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>

Author: libinyang

sound/soc/sof/ipc4-topology.c

@@ -985,6 +985,48 @@ static int sof_ipc4_widget_assign_instance_id(struct snd_sof_dev *sdev,
 	return 0;
 }
 
+/* update hw_params based on the audio stream format */
+static int sof_ipc4_update_hw_params(struct snd_sof_dev *sdev, struct snd_pcm_hw_params *params,
+				     struct sof_ipc4_audio_format *fmt)
+{
+	struct snd_interval *i;
+	struct snd_mask *m;
+	snd_pcm_format_t snd_fmt;
+	unsigned int channels, rate;
+	int valid_bits;
+
+	rate = fmt->sampling_frequency;
+	i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
+	i->min = rate;
+	i->max = rate;
+
+	channels = SOF_IPC4_AUDIO_FORMAT_CFG_CHANNELS_COUNT(fmt->fmt_cfg);
+	i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
+	i->min = channels;
+	i->max = channels;
+
+	valid_bits = SOF_IPC4_AUDIO_FORMAT_CFG_V_BIT_DEPTH(fmt->fmt_cfg);
+	switch (valid_bits) {
+	case 16:
+		snd_fmt = SNDRV_PCM_FORMAT_S16_LE;
+		break;
+	case 24:
+		snd_fmt = SNDRV_PCM_FORMAT_S24_LE;
+		break;
+	case 32:
+		snd_fmt = SNDRV_PCM_FORMAT_S32_LE;
+		break;
+	default:
+		dev_err(sdev->dev, "invalid pcm valid_bits %d\n", valid_bits);
+		return -EINVAL;
+	}
+	m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
+	snd_mask_none(m);
+	snd_mask_set_format(m, snd_fmt);
+
+	return 0;
+}
+
 static int sof_ipc4_init_audio_fmt(struct snd_sof_dev *sdev,
 				   struct snd_sof_widget *swidget,
 				   struct sof_ipc4_base_module_cfg *base_config,
@@ -1755,6 +1797,11 @@ static int sof_ipc4_prepare_process_module(struct snd_sof_widget *swidget,
 		memcpy(cfg, base_cfg_ext, process->base_config_ext_size);
 	}
 
+	/* modify the pipeline params with the pin 0 output format */
+	ret = sof_ipc4_update_hw_params(sdev, pipeline_params, &process->output_format);
+	if (ret)
+		return ret;
+
 	return 0;
 }