drm/amdgpu/uvd4.2: Don't initialize UVD 4.2 when DPM is disabled

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UVD 4.2 doesn't work at all when DPM is disabled because
the SMU is responsible for ungating it. So, Linux fails
to boot with CIK GPUs when using the amdgpu.dpm=0 parameter.

Fix this by returning -ENOENT from uvd_v4_2_early_init()
when amdgpu_dpm isn't enabled.

Note: amdgpu.dpm=0 is often suggested as a workaround
for issues and is useful for debugging.

Fixes: a2e73f56fa ("drm/amdgpu: Add support for CIK parts")
Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Timur Kristóf 2026-03-29 18:03:06 +02:00 • committed by Alex Deucher

parent 4724bc5b8d

commit 8b3e8fa6d7

1 changed files with 5 additions and 0 deletions

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drivers/gpu/drm/amd/amdgpu/uvd_v4_2.c

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