dGPU firmware flashing

IFWI

Flashing the dGPU integrated firmware image (IFWI) is supported by GPUs thatuse the PSP to orchestrate the update (Navi3x or newer GPUs).For supported GPUs,amdgpu will export a series of sysfs files that can beused for the flash process.

The IFWI flash process is:

  1. Ensure the IFWI image is intended for the dGPU on the system.

  2. “Write” the IFWI image to the sysfs filepsp_vbflash. This will stage the IFWI in memory.

  3. “Read” from thepsp_vbflash sysfs file to initiate the flash process.

  4. Poll thepsp_vbflash_status sysfs file to determine when the flash process completes.

USB-C PD F/W

On GPUs that support flashing an updated USB-C PD firmware image, the processis done using theusbc_pd_fw sysfs file.

  • Reading the file will provide the current firmware version.

  • Writing the name of a firmware payload stored in/lib/firmware/amdgpu to the sysfs file will initiate the flash process.

The firmware payload stored in/lib/firmware/amdgpu can be named any nameas long as it doesn’t conflict with other existing binaries that are used byamdgpu.

sysfs files

usbc_pd_fw

Reading from this file will retrieve the USB-C PD firmware version. Writing tothis file will trigger the update process.

psp_vbflash

Writing to this file will stage an IFWI for update. Reading from this filewill trigger the update process.

psp_vbflash_status

The status of the flash process.0: IFWI flash not complete.1: IFWI flash complete.