gpu_read64_poll_timeout
ret = gpu_read64_poll_timeout(pwr->iomem, pwrtrans_reg, val, !(PWR_ALL_CORES_MASK & val), 100,
ret = gpu_read64_poll_timeout(pwr->iomem, ready_reg, val, (mask & val) == expected_val,
ret = gpu_read64_poll_timeout(pwr->iomem, PWR_STATUS, val,
ret = gpu_read64_poll_timeout(pwr->iomem, PWR_STATUS, val,
ret = gpu_read64_poll_timeout(pwr->iomem, PWR_STATUS, val,