The helper function snd_soc_component_is_codec is based off the presence of the non_legacy_dai_naming flag. This isn't super robust as CPU side components may also specify this flag, and indeed the kernel already contains a couple that do. After componentisation there isn't really a totally robust solution to identifying what is a CODEC driver, without introducing a flag specifically for that purpose, and really the desirable direction to move in is that the distinction doesn't matter.
This patch does two things to try to mitigate these problems. Firstly, now that all the other users of the helper function have been removed, it makes the helper function local to the driver rather, than being part of the core. This should help to discourage any new code from being created that depends on the CODEC driver distinction. Secondly, it updates the helper function itself to use the endianness flag rather than the non_legacy_dai_naming flag. The endianness flag is definitely invalid on a CPU side component, so it a more reliable indicator that the device is definitely a CODEC. The vast majority of buses require the CODEC to set the endianness flag, so the number of corner cases should be fairly minimal. It is worth noting that CODECs sending audio over SPI, or built into the CPU CODECs are potential corner cases, however the hope is that in most cases those types of devices do not consitute a simple audio card.
Signed-off-by: Charles Keepax ckeepax@opensource.cirrus.com --- include/sound/soc-component.h | 5 ----- sound/soc/generic/simple-card-utils.c | 7 ++++++- 2 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/include/sound/soc-component.h b/include/sound/soc-component.h index 5a764c3099d3e..5c4cfa70b018c 100644 --- a/include/sound/soc-component.h +++ b/include/sound/soc-component.h @@ -348,11 +348,6 @@ static inline int snd_soc_component_cache_sync( return regcache_sync(component->regmap); }
-static inline int snd_soc_component_is_codec(struct snd_soc_component *component) -{ - return component->driver->non_legacy_dai_naming; -} - void snd_soc_component_set_aux(struct snd_soc_component *component, struct snd_soc_aux_dev *aux); int snd_soc_component_init(struct snd_soc_component *component); diff --git a/sound/soc/generic/simple-card-utils.c b/sound/soc/generic/simple-card-utils.c index 539d7f081bd79..50a9827089335 100644 --- a/sound/soc/generic/simple-card-utils.c +++ b/sound/soc/generic/simple-card-utils.c @@ -513,6 +513,11 @@ static int asoc_simple_init_dai(struct snd_soc_dai *dai, return 0; }
+static inline int asoc_simple_component_is_codec(struct snd_soc_component *component) +{ + return component->driver->endianness; +} + static int asoc_simple_init_dai_link_params(struct snd_soc_pcm_runtime *rtd, struct simple_dai_props *dai_props) { @@ -524,7 +529,7 @@ static int asoc_simple_init_dai_link_params(struct snd_soc_pcm_runtime *rtd,
/* Only Codecs */ for_each_rtd_components(rtd, i, component) { - if (!snd_soc_component_is_codec(component)) + if (!asoc_simple_component_is_codec(component)) return 0; }