[PATCH 0/2] Restore cached power limit and custom clocks

[PATCH 0/2] Restore cached power limit and custom clocks

[Mario Limonciello]

From: Mario Limonciello <mario.limonciello@amd.com>

If userspace has programmed a custom power limit and/or custom clock
table the state will not be maintained across an S3 suspend cycle.

The values are already cached, so restore them in the resume sequence.

Mario Limonciello (2):
  drm/amd: Restore cached power limit during resume
  drm/amd: Restore cached manual clock settings during resume

 drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

-- 
2.43.0

[PATCH 1/2] drm/amd: Restore cached power limit during resume

[Mario Limonciello]

From: Mario Limonciello <mario.limonciello@amd.com>

The power limit will be cached in smu->current_power_limit but
if the ASIC goes into S3 this value won't be restored.

Restore the value during SMU resume.

Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
---
 drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
index d79a1d94661a5..7537964c3c998 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
@@ -2175,6 +2175,12 @@ static int smu_resume(struct amdgpu_ip_block *ip_block)
 
 	adev->pm.dpm_enabled = true;
 
+	if (smu->current_power_limit) {
+		ret = smu_set_power_limit(smu, smu->current_power_limit);
+		if (ret && ret != -EOPNOTSUPP)
+			return ret;
+	}
+
 	dev_info(adev->dev, "SMU is resumed successfully!\n");
 
 	return 0;
-- 
2.43.0

[PATCH 2/2] drm/amd: Restore cached manual clock settings during resume

[Mario Limonciello]

From: Mario Limonciello <mario.limonciello@amd.com>

If the SCLK limits have been set before S3 they will not
be restored. The limits are however cached in the driver and so
they can be restored by running a commit sequence during resume.

Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
---
 drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
index 7537964c3c998..26b8e232f8582 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
@@ -76,6 +76,9 @@ static void smu_power_profile_mode_get(struct smu_context *smu,
 				       enum PP_SMC_POWER_PROFILE profile_mode);
 static void smu_power_profile_mode_put(struct smu_context *smu,
 				       enum PP_SMC_POWER_PROFILE profile_mode);
+static int smu_od_edit_dpm_table(void *handle,
+				 enum PP_OD_DPM_TABLE_COMMAND type,
+				 long *input, uint32_t size);
 
 static int smu_sys_get_pp_feature_mask(void *handle,
 				       char *buf)
@@ -2144,6 +2147,7 @@ static int smu_resume(struct amdgpu_ip_block *ip_block)
 	int ret;
 	struct amdgpu_device *adev = ip_block->adev;
 	struct smu_context *smu = adev->powerplay.pp_handle;
+	struct smu_dpm_context *smu_dpm_ctx = &(smu->smu_dpm);
 
 	if (amdgpu_sriov_multi_vf_mode(adev))
 		return 0;
@@ -2181,6 +2185,12 @@ static int smu_resume(struct amdgpu_ip_block *ip_block)
 			return ret;
 	}
 
+	if (smu_dpm_ctx->dpm_level == AMD_DPM_FORCED_LEVEL_MANUAL) {
+		ret = smu_od_edit_dpm_table(smu, PP_OD_COMMIT_DPM_TABLE, NULL, 0);
+		if (ret)
+			return ret;
+	}
+
 	dev_info(adev->dev, "SMU is resumed successfully!\n");
 
 	return 0;
-- 
2.43.0

Re: [PATCH 1/2] drm/amd: Restore cached power limit during resume

[Alex Deucher]

Series is:
Acked-by: Alex Deucher <alexander.deucher@amd.com>

On Thu, Jul 24, 2025 at 11:18 PM Mario Limonciello <superm1@kernel.org> wrote:
>
> From: Mario Limonciello <mario.limonciello@amd.com>
>
> The power limit will be cached in smu->current_power_limit but
> if the ASIC goes into S3 this value won't be restored.
>
> Restore the value during SMU resume.
>
> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
> ---
>  drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
> index d79a1d94661a5..7537964c3c998 100644
> --- a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
> +++ b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
> @@ -2175,6 +2175,12 @@ static int smu_resume(struct amdgpu_ip_block *ip_block)
>
>         adev->pm.dpm_enabled = true;
>
> +       if (smu->current_power_limit) {
> +               ret = smu_set_power_limit(smu, smu->current_power_limit);
> +               if (ret && ret != -EOPNOTSUPP)
> +                       return ret;
> +       }
> +
>         dev_info(adev->dev, "SMU is resumed successfully!\n");
>
>         return 0;
> --
> 2.43.0
>