Hoernchen has uploaded this change for review.

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ms: conditionally override the tuning mode

We want FPGA tuning because it is much faster, but unfortunately
throwing trash at it leads to the blade getting stuck until it is power
cycled or reinitialized using host tuning. Only set FPGA tuning if no
other mode like BLADERF_DEFAULT_TUNING_MODE=host is requested, which
allows easier recovery in those cases.

Change-Id: I11f2ecc50b480d71736a7f224295e5e37745385e
---
M Transceiver52M/ms/bladerf_specific.h
1 file changed, 17 insertions(+), 1 deletion(-)

git pull ssh://gerrit.osmocom.org:29418/osmo-trx refs/changes/57/35757/1

diff --git a/Transceiver52M/ms/bladerf_specific.h b/Transceiver52M/ms/bladerf_specific.h
index e9245d4..798f3d7 100644
--- a/Transceiver52M/ms/bladerf_specific.h
+++ b/Transceiver52M/ms/bladerf_specific.h
@@ -255,7 +255,8 @@
 		bladerf_log_set_verbosity(BLADERF_LOG_LEVEL_DEBUG);
 		bladerf_set_usb_reset_on_open(true);
 
-		setenv("BLADERF_DEFAULT_TUNING_MODE","fpga",1); // ensure blade 2 does not spend 10 seconds initializing host control
+		if (getenv("BLADERF_DEFAULT_TUNING_MODE") == NULL)
+			setenv("BLADERF_DEFAULT_TUNING_MODE","fpga",1); // ensure blade 2 does not spend 10 seconds initializing host control
 		blade_check(bladerf_open, &dev, "");
 		if (!dev) {
 			std::cerr << "open failed, device missing?" << std::endl;

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