Title
=====

Unlocking the Potential of Suspend to RAM (S2R) using Linux in a
Multi-Core, Multi-Firmware Automotive SoC

Description
===========

Fast booting in modern, complex System-on-Chips (SoCs) demands
innovative solutions. This talk delves into the intricacies of
implementing Suspend to RAM (S2R) on a sophisticated SoC featuring
diverse CPU cores—high-performance A72, real-time R5, and low-power
M3—as well as multiple firmware components, including open-source ones
like TF-A, U-Boot, and OP-TEE.

We begin with a hardware overview of the TI DRA821 SoC from the
Jacinto family, emphasizing the open-source firmware utilized in the
boot process. The focus then shifts to presenting a practical approach
for integrating S2R into this multifaceted platform. Notably, our
implementation poses a unique challenge: the SoC is entirely powered
off during S2R, adding an extra layer of complexity.

Join us as we share insights into the hurdles encountered and resolved
during the implementation, along with a discussion on the outstanding
challenges for which we've devised viable solutions. This session
offers a comprehensive exploration into the software, including
bootloaders and the Linux kernel, as well as the hardware aspects,
showcasing a real-world approach to bringing Suspend to RAM to life on
a cutting-edge automotive SoC.

Benefits to ecosystem
=====================

 In this talk, developers will learn about how Suspend to RAM (S2R)
 works and what it can and can't do. Drawing from our experience with
 the TI DRA821 SoC, attendees will gain useful knowledge to understand
 S2R better and know its limits. The goal is to make Suspend to RAM
 more accessible, helping developers make informed choices when using
 it on various devices in the tech community.

Bio
===

Gregory, an embedded Linux and kernel engineer at Bootlin since 2010,
is a co-maintainer of mvebu ARM sub-architectures, contributing
significantly to the Linux kernel. He has 20 years of on the field
experience in porting and operating embedded Linux on many hardware
architectures. He also worked on bootloaders such as U-Boot or
Barebox.