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authorPeter Rosin <peda@axentia.se>2015-01-28 15:16:06 +0100
committerMark Brown <broonie@kernel.org>2015-01-28 19:27:15 +0000
commitf66f898e953d56779367a6cbc39cbb4808b208c0 (patch)
treed0a7c9d3d6f9349080d5beca852723cd1574a1f6 /include/sound/pcm.h
parentba5295e55dd941425b10924f4f5c7af6eac4a1cb (diff)
downloadlinux-next-f66f898e953d56779367a6cbc39cbb4808b208c0.tar.gz
ALSA: pcm: Add snd_interval_ranges() and snd_pcm_hw_constraint_ranges()
Add helper functions to allow drivers to specify several disjoint ranges for a variable. In particular, there is a codec (PCM512x) that has a hole in its supported range of rates, due to PLL and divider restrictions. This is like snd_pcm_hw_constraint_list(), but for ranges instead of points. Signed-off-by: Peter Rosin <peda@axentia.se> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Reviewed-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'include/sound/pcm.h')
-rw-r--r--include/sound/pcm.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index 1e7f74acc2ec..04fc037e0555 100644
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -275,6 +275,12 @@ struct snd_pcm_hw_constraint_list {
unsigned int mask;
};
+struct snd_pcm_hw_constraint_ranges {
+ unsigned int count;
+ const struct snd_interval *ranges;
+ unsigned int mask;
+};
+
struct snd_pcm_hwptr_log;
struct snd_pcm_runtime {
@@ -910,6 +916,8 @@ void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k,
const struct snd_interval *b, struct snd_interval *c);
int snd_interval_list(struct snd_interval *i, unsigned int count,
const unsigned int *list, unsigned int mask);
+int snd_interval_ranges(struct snd_interval *i, unsigned int count,
+ const struct snd_interval *list, unsigned int mask);
int snd_interval_ratnum(struct snd_interval *i,
unsigned int rats_count, struct snd_ratnum *rats,
unsigned int *nump, unsigned int *denp);
@@ -934,6 +942,10 @@ int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime,
unsigned int cond,
snd_pcm_hw_param_t var,
const struct snd_pcm_hw_constraint_list *l);
+int snd_pcm_hw_constraint_ranges(struct snd_pcm_runtime *runtime,
+ unsigned int cond,
+ snd_pcm_hw_param_t var,
+ const struct snd_pcm_hw_constraint_ranges *r);
int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime,
unsigned int cond,
snd_pcm_hw_param_t var,