Merge branch 'topic/hw-constraint-single' into for-next

[firefly-linux-kernel-4.4.55.git] / include / sound / pcm.h

diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index 3e0ffd21901f6c7c14b2a3e9f9f4069b5ccd5a3c..4e6ad74fd8a2f7a4b38787e181e53b0e6456bf96 100644 (file)
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -1024,6 +1024,22 @@ int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime,
                        snd_pcm_hw_rule_func_t func, void *private,
                        int dep, ...);
 
+/**
+ * snd_pcm_hw_constraint_single() - Constrain parameter to a single value
+ * @runtime: PCM runtime instance
+ * @var: The hw_params variable to constrain
+ * @val: The value to constrain to
+ *
+ * Return: Positive if the value is changed, zero if it's not changed, or a
+ * negative error code.
+ */
+static inline int snd_pcm_hw_constraint_single(
+       struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
+       unsigned int val)
+{
+       return snd_pcm_hw_constraint_minmax(runtime, var, val, val);
+}
+
 int snd_pcm_format_signed(snd_pcm_format_t format);
 int snd_pcm_format_unsigned(snd_pcm_format_t format);
 int snd_pcm_format_linear(snd_pcm_format_t format);