Commit c0344266 authored Nov 14, 2025 by Timur Kristóf Committed by Alex Deucher Nov 14, 2025

drm/amdgpu: Use amdgpu by default on CIK dedicated GPUs



The amdgpu driver has been working well on CIK dGPUs for years.
Now that the DC analog connector support landed,
amdgpu is at feature parity with the old radeon driver
on CIK dGPUs.

Enabling the amdgpu driver by default for CIK dGPUs has the
following benefits:

- More stable OpenGL support through RadeonSI
- Vulkan support through RADV
- Improved performance
- Better display features through DC

Users who want to keep using the old driver can do so using:
amdgpu.cik_support=0 radeon.cik_support=1

v2:
- Update documentation in Kconfig file
v3:
- Rebase documentation updates (Alex)

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

parent 6a375399

drivers/gpu/drm/amd/amdgpu/Kconfig

+9 −3

Original line number	Diff line number	Diff line
		@@ -59,11 +59,17 @@ config DRM_AMDGPU_CIK
		Choose this option if you want to enable support for CIK (Sea
		Islands) asics.

		CIK is already supported in radeon. Support for CIK in amdgpu
		will be disabled by default and is still provided by radeon.
		Use module options to override this:
		CIK (Sea Islands) are second generation GCN GPUs,
		supported by both drivers: radeon (old) and amdgpu (new).
		By default,
		CIK dedicated GPUs are supported by amdgpu
		CIK APUs are supported by radeon

		Use module options to override this:
		To use amdgpu for CIK,
		radeon.cik_support=0 amdgpu.cik_support=1
		To use radeon for CIK,
		radeon.cik_support=1 amdgpu.cik_support=0

		config DRM_AMDGPU_USERPTR
		bool "Always enable userptr write support"