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drm/amd: Move helper for dynamic speed switch check out of smu13

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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 <mario.limonciello@amd.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org # 6.1.x
This commit is contained in:
Mario Limonciello 2023-07-07 21:26:08 -05:00 committed by Alex Deucher
parent 31c7a3b378
commit 188623076d
3 changed files with 21 additions and 20 deletions
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1
drivers/gpu/drm/amd/amdgpu/amdgpu.h
View file

@ -1296,6 +1296,7 @@ int amdgpu_device_gpu_recover(struct amdgpu_device *adev,
void amdgpu_device_pci_config_reset(struct amdgpu_device *adev);
int amdgpu_device_pci_reset(struct amdgpu_device *adev);
bool amdgpu_device_need_post(struct amdgpu_device *adev);
bool amdgpu_device_pcie_dynamic_switching_supported(void);
bool amdgpu_device_should_use_aspm(struct amdgpu_device *adev);
bool amdgpu_device_aspm_support_quirk(void);

19
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
View file

@ -1458,6 +1458,25 @@ 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
*

21
drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c
View file

@ -2425,25 +2425,6 @@ int smu_v13_0_mode1_reset(struct smu_context *smu)
return ret;
}
/*
* 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
*/
static bool smu_v13_0_is_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;
}
int smu_v13_0_update_pcie_parameters(struct smu_context *smu,
uint32_t pcie_gen_cap,
uint32_t pcie_width_cap)
@ -2455,7 +2436,7 @@ int smu_v13_0_update_pcie_parameters(struct smu_context *smu,
uint32_t smu_pcie_arg;
int ret, i;
if (!smu_v13_0_is_pcie_dynamic_switching_supported()) {
if (!amdgpu_device_pcie_dynamic_switching_supported()) {
if (pcie_table->pcie_gen[num_of_levels - 1] < pcie_gen_cap)
pcie_gen_cap = pcie_table->pcie_gen[num_of_levels - 1];