diff options
| author | Mario Limonciello <[email protected]> | 2023-07-08 02:26:08 +0000 |
|---|---|---|
| committer | Alex Deucher <[email protected]> | 2023-07-12 15:12:10 +0000 |
| commit | 5d1eb4c4c872b55664f5754cc16827beff8630a7 (patch) | |
| tree | 57bc83e61679ea7716e905f197db38ab500ddb62 /drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | |
| parent | drm/amdgpu: update kernel vcn ring test (diff) | |
| download | kernel-5d1eb4c4c872b55664f5754cc16827beff8630a7.tar.gz kernel-5d1eb4c4c872b55664f5754cc16827beff8630a7.zip | |
drm/amd: Move helper for dynamic speed switch check out of smu13
This helper is used for checking if the connected host supports
the feature, it can be moved into generic code to be used by other
smu implementations as well.
Signed-off-by: Mario Limonciello <[email protected]>
Reviewed-by: Evan Quan <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_device.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index fcf5f07c4775..7314529553f6 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -1461,6 +1461,25 @@ bool amdgpu_device_need_post(struct amdgpu_device *adev) return true; } +/* + * Intel hosts such as Raptor Lake and Sapphire Rapids don't support dynamic + * speed switching. Until we have confirmation from Intel that a specific host + * supports it, it's safer that we keep it disabled for all. + * + * https://edc.intel.com/content/www/us/en/design/products/platforms/details/raptor-lake-s/13th-generation-core-processors-datasheet-volume-1-of-2/005/pci-express-support/ + * https://gitlab.freedesktop.org/drm/amd/-/issues/2663 + */ +bool amdgpu_device_pcie_dynamic_switching_supported(void) +{ +#if IS_ENABLED(CONFIG_X86) + struct cpuinfo_x86 *c = &cpu_data(0); + + if (c->x86_vendor == X86_VENDOR_INTEL) + return false; +#endif + return true; +} + /** * amdgpu_device_should_use_aspm - check if the device should program ASPM * |