underflow_occurred 1399 drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c uint32_t underflow_occurred = 0; underflow_occurred 1403 drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c &underflow_occurred); underflow_occurred 1405 drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c return (underflow_occurred == 1);