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| author | Mario Limonciello <mario.limonciello@amd.com> | 2023-06-26 10:04:07 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2023-07-07 13:51:47 -0400 |
| commit | 649663af73f59ca6f7dc9021b93c087877e4d8e3 (patch) | |
| tree | 3a75874ff0bb3151e26de3ea461ad8d3a9bc4c37 /Documentation/gpu | |
| parent | 98d19a6c49b5d61d75cf53c7001541f157683bb8 (diff) | |
| download | linux-649663af73f59ca6f7dc9021b93c087877e4d8e3.tar.gz | |
drm/amd: Add documentation for how to flash a dGPU
The flashing process for dGPUs uses sysfs files in a
non-obvious way, so document it for users.
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'Documentation/gpu')
| -rw-r--r-- | Documentation/gpu/amdgpu/flashing.rst | 33 | ||||
| -rw-r--r-- | Documentation/gpu/amdgpu/index.rst | 1 |
2 files changed, 34 insertions, 0 deletions
diff --git a/Documentation/gpu/amdgpu/flashing.rst b/Documentation/gpu/amdgpu/flashing.rst new file mode 100644 index 0000000000000..bd745c42a538f --- /dev/null +++ b/Documentation/gpu/amdgpu/flashing.rst @@ -0,0 +1,33 @@ +======================= + 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 diff --git a/Documentation/gpu/amdgpu/index.rst b/Documentation/gpu/amdgpu/index.rst index 03c2966cae798..912e699fd3731 100644 --- a/Documentation/gpu/amdgpu/index.rst +++ b/Documentation/gpu/amdgpu/index.rst @@ -10,6 +10,7 @@ Next (GCN), Radeon DNA (RDNA), and Compute DNA (CDNA) architectures. module-parameters driver-core display/index + flashing xgmi ras thermal |