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- =======================
- dGPU firmware flashing
- =======================
- IFWI
- ----
- Flashing the dGPU integrated firmware image (IFWI) is supported by GPUs that
- use the PSP to orchestrate the update (Navi3x or newer GPUs).
- For supported GPUs, `amdgpu` will export a series of sysfs files that can be
- used 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 file `psp_vbflash`. This will stage the IFWI in memory.
- 3. "Read" from the `psp_vbflash` sysfs file to initiate the flash process.
- 4. Poll the `psp_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 process
- is done using the `usbc_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 name
- as long as it doesn't conflict with other existing binaries that are used by
- `amdgpu`.
- sysfs files
- -----------
- .. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
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