diff options
Diffstat (limited to 'drivers/gpu/drm/amd/pm/amdgpu_pm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/pm/amdgpu_pm.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/pm/amdgpu_pm.c b/drivers/gpu/drm/amd/pm/amdgpu_pm.c index 2d19282e4fbe..886bb00eaa78 100644 --- a/drivers/gpu/drm/amd/pm/amdgpu_pm.c +++ b/drivers/gpu/drm/amd/pm/amdgpu_pm.c @@ -1991,6 +1991,70 @@ static int ss_bias_attr_update(struct amdgpu_device *adev, struct amdgpu_device_ return 0; } +/* Following items will be read out to indicate current plpd policy: + * - -1: none + * - 0: disallow + * - 1: default + * - 2: optimized + */ +static ssize_t amdgpu_get_xgmi_plpd_policy(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct drm_device *ddev = dev_get_drvdata(dev); + struct amdgpu_device *adev = drm_to_adev(ddev); + char *mode_desc = "none"; + int mode; + + if (amdgpu_in_reset(adev)) + return -EPERM; + if (adev->in_suspend && !adev->in_runpm) + return -EPERM; + + mode = amdgpu_dpm_get_xgmi_plpd_mode(adev, &mode_desc); + + return sysfs_emit(buf, "%d: %s\n", mode, mode_desc); +} + +/* Following argument value is expected from user to change plpd policy + * - arg 0: disallow plpd + * - arg 1: default policy + * - arg 2: optimized policy + */ +static ssize_t amdgpu_set_xgmi_plpd_policy(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct drm_device *ddev = dev_get_drvdata(dev); + struct amdgpu_device *adev = drm_to_adev(ddev); + int mode, ret; + + if (amdgpu_in_reset(adev)) + return -EPERM; + if (adev->in_suspend && !adev->in_runpm) + return -EPERM; + + ret = kstrtos32(buf, 0, &mode); + if (ret) + return -EINVAL; + + ret = pm_runtime_get_sync(ddev->dev); + if (ret < 0) { + pm_runtime_put_autosuspend(ddev->dev); + return ret; + } + + ret = amdgpu_dpm_set_xgmi_plpd_mode(adev, mode); + + pm_runtime_mark_last_busy(ddev->dev); + pm_runtime_put_autosuspend(ddev->dev); + + if (ret) + return ret; + + return count; +} + static struct amdgpu_device_attr amdgpu_device_attrs[] = { AMDGPU_DEVICE_ATTR_RW(power_dpm_state, ATTR_FLAG_BASIC|ATTR_FLAG_ONEVF), AMDGPU_DEVICE_ATTR_RW(power_dpm_force_performance_level, ATTR_FLAG_BASIC|ATTR_FLAG_ONEVF), @@ -2026,6 +2090,7 @@ static struct amdgpu_device_attr amdgpu_device_attrs[] = { .attr_update = ss_power_attr_update), AMDGPU_DEVICE_ATTR_RW(smartshift_bias, ATTR_FLAG_BASIC, .attr_update = ss_bias_attr_update), + AMDGPU_DEVICE_ATTR_RW(xgmi_plpd_policy, ATTR_FLAG_BASIC), }; static int default_attr_update(struct amdgpu_device *adev, struct amdgpu_device_attr *attr, @@ -2124,6 +2189,9 @@ static int default_attr_update(struct amdgpu_device *adev, struct amdgpu_device_ *states = ATTR_STATE_UNSUPPORTED; else if (gc_ver == IP_VERSION(10, 3, 0) && amdgpu_sriov_vf(adev)) *states = ATTR_STATE_UNSUPPORTED; + } else if (DEVICE_ATTR_IS(xgmi_plpd_policy)) { + if (amdgpu_dpm_get_xgmi_plpd_mode(adev, NULL) == XGMI_PLPD_NONE) + *states = ATTR_STATE_UNSUPPORTED; } switch (gc_ver) { |