def verify_short_blanking(self):
"""On baytrail systems with a known panel, checks the kernel log for a
message that a short blanking mode has been added."""
logging.info('Running verify_short_blanking')
if self._gpu_type != 'baytrail' or utils.has_no_monitor():
return ''
# Open the EDID to find the panel model.
param_path = '/sys/class/drm/card0-eDP-1/edid'
if not os.path.exists(param_path):
logging.error('Error: %s not found.', param_path)
return self.handle_error(
'Short blanking not added (no EDID found). ')
with open(param_path, 'r') as edp_edid_file:
edp_edid_file.seek(8)
data = edp_edid_file.read(2)
manufacturer = int(struct.unpack('<H', data)[0])
data = edp_edid_file.read(2)
product_code = int(struct.unpack('<H', data)[0])
# This is not the panel we are looking for (AUO B116XTN02.2)
if manufacturer != 0xaf06 or product_code != 0x225c:
return ''
# Get the downclock message from the logs.
reader = cros_logging.LogReader()
reader.set_start_by_reboot(-1)
if not reader.can_find(
'Modified preferred into a short blanking mode'):
return self.handle_error('Short blanking not added. ')
return ''
def verify_graphics_fbc(self):
""" On systems which support FBC, check that we can get into FBC;
idle before doing so, and retry every second for 20 seconds."""
logging.info('Running verify_graphics_fbc')
# Link's FBC is disabled (crbug.com/338588).
# TODO(marcheu): remove this when/if we fix this bug.
board = utils.get_board()
if board == 'link':
return ''
# Machines which don't have a monitor can't get FBC.
if utils.has_no_monitor():
return ''
if (self._gpu_type == 'haswell' or self._gpu_type == 'ivybridge'
or self._gpu_type == 'sandybridge'):
tries = 0
found = False
param_path = self.get_valid_path(FBC_PATHS)
if not param_path:
return 'FBC_PATHS not found.'
while not found and tries < 20:
time.sleep(1)
with open(param_path, 'r') as fbc_info_file:
for line in fbc_info_file:
if re.search('FBC enabled', line):
found = True
break
tries += 1
if not found:
return self.handle_error('Did not see FBC enabled. ',
param_path)
return ''