Hi ALSA ML
I'm checking ALSA SoC framework.
Now, many Components are connected to Card.
When we want to do something to all Components,
we have 2 type of loops
1) for_each_card_components(card, component) {
...
}
2) for_each_card_rtds(card, rtd) {
for_each_rtd_components(rtd, i, component) {
...
}
}
But, I noticed that these 1) and 2) are not same.
Please double check it.
We have 3 ways to connect Component to Card.
a) via Card pre-linked Aux (= card->aux_dev)
b) via Card pre-linked link (= card->dai_link)
c) via Topology dai_link
static int snd_soc_bind_card(struct snd_soc_card *card)
{
...
a) ret = soc_bind_aux_dev(card);
...
for_each_card_prelinks(card, i, dai_link) {
b) ret = snd_soc_add_pcm_runtime(card, dai_link);
...
}
...
c) ret = snd_soc_card_probe(card);
...
X) ret = soc_probe_link_components(card);
...
Y) ret = soc_probe_aux_devices(card);
...
Here, b) and c) has dai_link / rtd.
And, connected Component are probed at X) (= b) + c)) Y) (= a)).
Then, probed Component are connected to card->component_dev_list.
Above 1) loop is based on it.
In total, 1) and 2) loop difference are
1) loop is for a) + b) + c)
2) loop is for b) + c)
Now, ALSA SoC suspend/resume checks below,
but a) doesn't have it.
rtd->dai_link->ignore_suspend.
Thus, "suspend" is using 2) loop,
but, "resume" is using 1) loop.
My question here is that can AUX suspend/resume ?
I think we need/want to use 1) loop for it.
Thank you for your help !!
Best regards
---
Kuninori Morimoto
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