Add a new function to look up PCM format codes by name. This can be used by ASoC drivers to look up formats through device-tree properties, for instance.
Signed-off-by: Daniel Mack daniel@zonque.org --- include/sound/pcm.h | 1 + sound/core/pcm.c | 23 +++++++++++++++++++++++ 2 files changed, 24 insertions(+)
diff --git a/include/sound/pcm.h b/include/sound/pcm.h index 8a89fa6fdd5e..1bfde6f2f180 100644 --- a/include/sound/pcm.h +++ b/include/sound/pcm.h @@ -1339,6 +1339,7 @@ static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max) (IEC958_AES3_CON_FS_48000<<24))
const char *snd_pcm_format_name(snd_pcm_format_t format); +int snd_pcm_format_by_name(const char *name, snd_pcm_format_t *format);
/** * snd_pcm_stream_str - Get a string naming the direction of a stream diff --git a/sound/core/pcm.c b/sound/core/pcm.c index 9a72d641743d..c02d8df4f92b 100644 --- a/sound/core/pcm.c +++ b/sound/core/pcm.c @@ -225,6 +225,29 @@ const char *snd_pcm_format_name(snd_pcm_format_t format) } EXPORT_SYMBOL_GPL(snd_pcm_format_name);
+/** + * snd_pcm_format_by_name - Return the PCM format code for the given name + * @name: PCM format name ('S16_LE', 'S24_3LE', ...) + * @format: Pointer to returned PCM format code + * + * The string comparison is done in a case-insensitive way. + * + * Return: 0 on success, or -ENOENT if the given format is not valid. + */ +int snd_pcm_format_by_name(const char *name, snd_pcm_format_t *format) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(snd_pcm_format_names); i++) + if (strcasecmp(name, snd_pcm_format_names[i]) == 0) { + *format = i; + return 0; + } + + return -ENOENT; +} +EXPORT_SYMBOL_GPL(snd_pcm_format_by_name); + #ifdef CONFIG_SND_VERBOSE_PROCFS
#define STATE(v) [SNDRV_PCM_STATE_##v] = #v