imx233: Implement mutex for cpu_boost_lock/unlock

Playing AAC-HE files resulted in a race condition between
audio/codec/buffering for set_cpu_frequency

Change-Id: I35e1c1fd18db623e2990c305acdca03f57184d0d

1 files changed, 17 insertions, 0 deletions

diff --git a/firmware/target/arm/imx233/system-target.h b/firmware/target/arm/imx233/system-target.h
index ee2df9a3e9..45dc58698a 100644
--- a/firmware/target/arm/imx233/system-target.h
+++ b/firmware/target/arm/imx233/system-target.h
@@ -54,6 +54,23 @@ bool imx233_us_elapsed(uint32_t ref, unsigned us_delay);
 void imx233_reset_block(volatile uint32_t *block_reg);
 void imx233_enable_usb_controller(bool enable);
 void imx233_enable_usb_phy(bool enable);
+
+#ifdef HAVE_ADJUSTABLE_CPU_FREQ
+#define CPU_BOOST_LOCK_DEFINED
+
+static inline bool cpu_boost_lock(void)
+{
+    bool set_cpu_frequency__lock(void);
+    return set_cpu_frequency__lock();
+}
+
+static inline void cpu_boost_unlock(void)
+{
+    void set_cpu_frequency__unlock(void);
+    set_cpu_frequency__unlock();
+}
+#endif /* HAVE_ADJUSTABLE_CPU_FREQ */
+
 // NOTE: this is available even if HAVE_ADJUSTABLE_CPU_FREQ is undef
 void imx233_set_cpu_frequency(long frequency);