Re: [PATCH v3] mhi: host: Add standard elf image download functionality
Jeff Johnson <[email protected]>
| Newsgroups | dev.linux.lists.mhi,org.kernel.vger.linux-arm-msm,org.kernel.vger.linux-kernel |
|---|---|
| Message-ID | <[email protected]> |
On 12/1/2025 6:33 PM, Qiang Yu wrote: > From: Mayank Rana <[email protected]> > > Currently, the FBC image is a non-standard ELF file that contains a single > ELF header, followed by segments for SBL, and WLAN FW. However, TME-L > (Trust Management Engine Lite) supported devices (eg. QCC2072) requires > separate ELF headers for SBL and WLAN FW segments due to TME-L image > authentication requirement. > > Current image format contains two sections in a single binary: > - First 512KB: ELF header + SBL segments > - Remaining: WLAN FW segments > > The TME-L supported image format contains two sections with two elf > headers in a single binary: > - First 512KB: First ELF header + SBL segments > - Remaining: Second ELF header + WLAN FW segments > > Download behavior: > - Legacy: 1. First 512KB via BHI (ELF header + SBL) > 2. Full image via BHIe > > - TME-L: 1. First 512KB via BHI (First ELF header + SBL) > 2. Remaining via BHIe (Second ELF header + WLAN FW segments) > > Add standard_elf_image flag to mhi_controller_config to indicate TME-L > supported image format. When set, MHI skips the first 512KB during WLAN FW > download over BHIe as it is loaded in BHI phase. FYI the consumer of this functionality is now available: series: https://lore.kernel.org/all/20251218-ath12k-support-qcc2072-v1-0-87928cf8e547@oss.qualcomm.com specific patch: https://lore.kernel.org/all/20251218-ath12k-support-qcc2072-v1-11-87928cf8e547@oss.qualcomm.com/