| ======================= |
| 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 |
