| Bug ID | 1180338 |
|---|---|
| Summary | [RPi4] u-boot can't handle DMA addresses different from CPU's |
| Classification | openSUSE |
| Product | openSUSE Tumbleweed |
| Version | Current |
| Hardware | Other |
| OS | Other |
| Status | NEW |
| Severity | Normal |
| Priority | P5 - None |
| Component | Bootloader |
| Assignee | screening-team-bugs@suse.de |
| Reporter | nsaenzjulienne@suse.com |
| QA Contact | qa-bugs@suse.de |
| Found By | --- |
| Blocker | --- |
After a firmware upgrade, RPi4's PCIe bus configuration changed. Inbound access (PCI bus mastering) is now configured to happen with a DMA offset (used to be transparent). This isn't supported so far in u-boot and breaks USB support both in u-boot and GRUB. A series addresses this here: http://u-boot.10912.n7.nabble.com/PATCH-v5-00-13-Raspberry-Pi-400-Compute-Module-4-support-td435983.html which will be hopefully backported into TW's u-boot soon.