Hi ASoC
Cc Mark, Pierre-Louis, Cezary
I have very interesting to clean up ASoC.
I think it is still very complex, thus, non flexible.
I'm thinking that we want to cleanup...
- Component with multi Card connection
- fixed playback vs capture
- fixed CPU vs Codec
- DPCM connection vs normal connection
About first topic,
I guess the biggest reason why we have limitation is
its connections. Text based image is a little bit difficult,
but if my understanding was correct, current connections are...
card <-> rtd <-> rtd <-> rtd <-> ...
| |
+--------|-----+---------------+-----------+ (A)
| | | |
+-> component -> component -> component -> ...
| (CPU) (Codec) (Platform)
| | | | |
+-> dai -> dai -> dai -> dai -> ...
Card has "component list", and Component has pointer to Card (A).
This makes the limitation which blocking multiple Card connections, I think.
One note here is that "Platform" doesn't have "DAI".
So if rtd have something other connector list, let's say "ep" list here for now,
instead of "dai", and remove Card <-> Component connection,
I think the connection can be simple, and the issue can be gone,
but what do you think ?
card <-> rtd <-> rtd <-> rtd <-> ...
|
| dai dai dai dai
| | | | |
+--> ep --> ep --> ep -> ep -> ep -> ...
| | | | |
component component component
(CPU) (Codec) (Platform)
Here, ep is like this
struct rtd_entry_point {
struct list_head list; // list for rtd
struct struct snd_soc_pcm_runtime *rtd;
struct snd_soc_component *component;
struct snd_soc_dai *dai;
};
Current for_each_xxx() can be like this
for_each_rtd_components() = for_each_rtd_ep() + ep_to_component()
for_each_rtd_dais() = for_each_rtd_ep() + ep_to_dai()
for_each_card_components() = for_each_card_rtds() + for_each_rtd_components()
I guess Component can have multiple Card connection on this idea,
but what do you think ?
Maybe I'm misunderstanding and/or missing something, because ASoC
is complex enough :)
Please let me know if I was misunderstanding or missing.
Thank you for your help !!
Best regards
---
Kuninori Morimoto
