btc_dpm_pre_set_power_state 1597 drivers/gpu/drm/radeon/radeon_asic.c 		.pre_set_power_state = &btc_dpm_pre_set_power_state,
btc_dpm_pre_set_power_state  568 drivers/gpu/drm/radeon/radeon_asic.h int btc_dpm_pre_set_power_state(struct radeon_device *rdev);