On 12/9/19 12:35 PM, Daniel Mack wrote:
This driver makes AD242x nodes available as DAIs in ASoC topologies.
The hardware allows multiple TDM channel modes and bitdepths, but
as these modes have influence in the timing calculations at discovery
time, the mode in that the will be used in needs to be configured
the mode in that the <what> will be used in?
You should probably reword this for clarity.
statically in the devicetree.
+ if (ad242x_node_is_master(priv->node) &&
+ ((format & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS)) {
+ dev_err(component->dev, "master node must be clock slave\n");
+ return -EINVAL;
+ }
+
+ if (!ad242x_node_is_master(priv->node) &&
+ ((format & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBM_CFM)) {
+ dev_err(component->dev, "slave node must be clock master\n");
+ return -EINVAL;
+ }
It was my understanding that the master node provides the clock to the
bus, so not sure how it could be a clock slave, and conversely how a
slave node could provide a clock to the bus?
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_S16_LE:
+ if (priv->node->tdm_slot_size != 16)
+ return -EINVAL;
+ break;
+ case SNDRV_PCM_FORMAT_S32_LE:
+ if (priv->node->tdm_slot_size != 32)
+ return -EINVAL;
+ break;
+ default:
+ return -EINVAL;
+ }
how does this work for PDM data?
is the PDM data packed into a regular TDM slot?
+
+ if (priv->pdm[index]) {
+ if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
+ return -EINVAL;
+
+ if (index == 0) {
+ val = AD242X_PDMCTL_PDM0EN;
+ mask = AD242X_PDMCTL_PDM0EN | AD242X_PDMCTL_PDM0SLOTS;
+ } else {
+ val = AD242X_PDMCTL_PDM1EN;
+ mask = AD242X_PDMCTL_PDM1EN | AD242X_PDMCTL_PDM1SLOTS;
+ }
+
+ switch (params_channels(params)) {
+ case 1:
+ break;
+ case 2:
+ val = mask;
+ break;
A comment wouldn't hurt here...
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