Hi Mark, Stephen
Sorry, this is self response, but...
ASoC sound driver requires CPU/CODEC drivers for probing, and each CPU/CODEC has some DAI on it. Then, "dai name matching" have been used to identify CPU-CODEC DAI pair on ASoC.
But, the "dai port number matching" is now required from DeviceTree. The solution of this issue is to replace the dai port number into dai name, and it needs some kind of .of_xlate function on each driver.
This patch adds .of_xlate_dai_name callback interface on struct snd_soc_dai_driver, very basic/common snd_soc_common_of_xlate_dai_name() which replace the dai port number into dai name, and snd_soc_of_get_port_dai_name() which is using .of_xlate_dai_name.
Then, #sound-dai-cells which enables DAI specifier is required on CPU/CODEC device tree properties.
Signed-off-by: Kuninori Morimoto kuninori.morimoto.gx@renesas.com
(snip)
+const char *snd_soc_common_of_xlate_dai_name(struct snd_soc_dai *dai,
const struct of_phandle_args *args)+{
- if (dai->id != args->args[0])
return NULL;- return dai->driver->name;
+} +EXPORT_SYMBOL_GPL(snd_soc_common_of_xlate_dai_name);
I used *common* for this function name, but *simple* or *basic* seems better name ?
Best regards --- Kuninori Morimoto