<div style="width: 45%;">
    <img t-att-src="image_data_uri(o.company_id.logo)"/></div>

You can use doc.company_id or res_company for company logo:

Like

<img t-if="res_company.logo" t-att-src="'data:image/png;base64,%s' %res_company.logo"/>

<img t-if="doc.company_id.logo" t-att-src="'data:image/png;base64,%s' %doc.company_id.logo"/>

Hi,

You can add the company logo to report using this,

<div style="width: 45%;float: left;">
    <img src='/web/binary/company_logo' style="width:100%"/>
</div>

Thanks a lot, 

works all solutions!!!

Enjoy!!!