======================= 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 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 processis 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 nameas 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