Merge branch 'maint'

3 files changed, 4 insertions, 15 deletions

diff --git a/host/lib/usrp/x300/x300_adc_dac_utils.cpp b/host/lib/usrp/x300/x300_adc_dac_utils.cpp
index e08825749..cd337febb 100644
--- a/host/lib/usrp/x300/x300_adc_dac_utils.cpp
+++ b/host/lib/usrp/x300/x300_adc_dac_utils.cpp
@@ -35,7 +35,7 @@ void x300_impl::synchronize_dacs(const std::vector<radio_perifs_t*>& radios)
 
     //Reinitialize and resync all DACs
     for (size_t i = 0; i < radios.size(); i++) {
-        radios[i]->dac->reset_and_resync();
+        radios[i]->dac->reset();
     }
 
     //Get a rough estimate of the cumulative command latency
diff --git a/host/lib/usrp/x300/x300_dac_ctrl.cpp b/host/lib/usrp/x300/x300_dac_ctrl.cpp
index bb41146b6..d49fba383 100644
--- a/host/lib/usrp/x300/x300_dac_ctrl.cpp
+++ b/host/lib/usrp/x300/x300_dac_ctrl.cpp
@@ -69,21 +69,13 @@ public:
         //ADI recommendations:
         //- soft reset the chip before configuration
         //- put the chip in sleep mode during configuration and wake it up when done
-        _soft_reset();
-        _sleep_mode(true);
-        _init();
-        _sleep_mode(false);
-    }
-
-    void reset_and_resync()
-    {
-        //ADI recommendations:
-        //- soft reset the chip before configuration
-        //- put the chip in sleep mode during configuration and wake it up when done
         //- configure synchronization settings when sleeping
         _soft_reset();
         _sleep_mode(true);
         _init();
+        //We run backend sync regardless of whether we need to sync multiple DACs
+        //because we use the internal DAC FIFO to meet system synchronous timing
+        //and we need to guarantee that the FIFO is not empty.
         _backend_sync();
         _sleep_mode(false);
     }
diff --git a/host/lib/usrp/x300/x300_dac_ctrl.hpp b/host/lib/usrp/x300/x300_dac_ctrl.hpp
index c2e509b54..f2a407971 100644
--- a/host/lib/usrp/x300/x300_dac_ctrl.hpp
+++ b/host/lib/usrp/x300/x300_dac_ctrl.hpp
@@ -40,9 +40,6 @@ public:
     // ! Reset the DAC
     virtual void reset(void) = 0;
 
-    // ! Reset the DAC and resync
-    virtual void reset_and_resync(void) = 0;
-
     // ! Check for successful backend and frontend sync
     virtual void verify_sync(void) = 0;
 };