ASoC: soc-core: add for_each_rtd_components() and replace
ALSA SoC has for_each_rtdcom() which is link list for
rtd-component which is called as rtdcom. The relationship image is like below
rtdcom rtdcom rtdcom
component component component
rtd->component_list -> list -> list -> list ...
Here, the pointer get via normal link list is rtdcom,
Thus, current for_each loop is like below, and need to get
component via rtdcom->component
for_each_rtdcom(rtd, rtdcom) {
component = rtdcom->component;
...
}
but usually, user want to get pointer from for_each_xxx is component
directly, like below.
for_each_rtd_component(rtd, rtdcom, component) {
...
}
This patch expands list_for_each_entry manually, and enable to get
component directly from for_each macro.
Because of it, the macro becoming difficult to read,
but macro itself becoming useful.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/878spm64m4.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/include/sound/soc.h b/include/sound/soc.h
index d730883..320dcd4 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -739,8 +739,12 @@ struct snd_soc_rtdcom_list {
struct snd_soc_component*
snd_soc_rtdcom_lookup(struct snd_soc_pcm_runtime *rtd,
const char *driver_name);
-#define for_each_rtdcom(rtd, rtdcom) \
- list_for_each_entry(rtdcom, &(rtd)->component_list, list)
+#define for_each_rtd_components(rtd, rtdcom, _component) \
+ for (rtdcom = list_first_entry(&(rtd)->component_list, \
+ typeof(*rtdcom), list); \
+ (&rtdcom->list != &(rtd)->component_list) && \
+ (_component = rtdcom->component); \
+ rtdcom = list_next_entry(rtdcom, list))
struct snd_soc_dai_link_component {
const char *name;