1=======================
 2 dGPU firmware flashing
 3=======================
 4
 5IFWI
 6----
 7Flashing the dGPU integrated firmware image (IFWI) is supported by GPUs that
 8use the PSP to orchestrate the update (Navi3x or newer GPUs).
 9For supported GPUs, `amdgpu` will export a series of sysfs files that can be
10used for the flash process.
11
12The IFWI flash process is:
13
141. Ensure the IFWI image is intended for the dGPU on the system.
152. "Write" the IFWI image to the sysfs file `psp_vbflash`. This will stage the IFWI in memory.
163. "Read" from the `psp_vbflash` sysfs file to initiate the flash process.
174. Poll the `psp_vbflash_status` sysfs file to determine when the flash process completes.
18
19USB-C PD F/W
20------------
21On GPUs that support flashing an updated USB-C PD firmware image, the process
22is done using the `usbc_pd_fw` sysfs file.
23
24* Reading the file will provide the current firmware version.
25* Writing the name of a firmware payload stored in `/lib/firmware/amdgpu` to the sysfs file will initiate the flash process.
26
27The firmware payload stored in `/lib/firmware/amdgpu` can be named any name
28as long as it doesn't conflict with other existing binaries that are used by
29`amdgpu`.
30
31sysfs files
32-----------
33.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c