skpbench: filter out junk spewed by Pixel C driver

tools/skpbench/_hardware_pixel_c.py

 # Copyright 2016 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 from _hardware import HardwareException, Expectation
 from _hardware_android import HardwareAndroid
 
 CPU_CLOCK_RATE = 1836000
 GPU_EMC_PROFILE = '0c: core 921 MHz emc 1600 MHz a A d D *'
 GPU_EMC_PROFILE_ID = '0c'
 
 class HardwarePixelC(HardwareAndroid):
   def __init__(self, adb):
     HardwareAndroid.__init__(self, adb)
 
   def __enter__(self):
     self._lock_clocks()
     return HardwareAndroid.__enter__(self)
 
   def __exit__(self, exception_type, exception_value, exception_traceback):
     HardwareAndroid.__exit__(self, exception_type,
                              exception_value, exception_traceback)
     self._unlock_clocks()
 
+  def filter_line(self, line):
+    JUNK = ['NvRmPrivGetChipPlatform: Could not read platform information',
+            'Expected on kernels without fuse support, using silicon']
+    return False if line in JUNK else HardwareAndroid.filter_line(self, line)
+
   def _lock_clocks(self):
     if not self._is_root:
       return
 
     # lock cpu clocks.
     self._adb.shell('''\
       for N in $(seq 0 3); do
         echo userspace > /sys/devices/system/cpu/cpu$N/cpufreq/scaling_governor
         echo %i > /sys/devices/system/cpu/cpu$N/cpufreq/scaling_setspeed
       done''' % CPU_CLOCK_RATE)
@@ skipping 49 matching lines @@
                    name='cpu_%i clock rate' % i, sleeptime=30)
        for i in range(4)] + \
       [Expectation(str, exact_value=GPU_EMC_PROFILE, name='gpu/emc profile')]
 
     Expectation.check_all(expectations, result)
 
   def sleep(self, sleeptime):
     self._unlock_clocks()
     HardwareAndroid.sleep(self, sleeptime)
     self._lock_clocks()