diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c index 51eb2cf42b81..f21f294e6735 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c @@ -626,6 +626,60 @@ static ssize_t amdgpu_get_pp_od_clk_voltage(struct device *dev, } /** + * DOC: ppfeatures + * + * The amdgpu driver provides a sysfs API for adjusting what powerplay + * features to be enabled. The file ppfeatures is used for this. And + * this is only available for Vega10 and later dGPUs. + * + * Reading back the file will show you the followings: + * - Current ppfeature masks + * - List of the all supported powerplay features with their naming, + * bitmasks and enablement status('Y'/'N' means "enabled"/"disabled"). + * + * To manually enable or disable a specific feature, just set or clear + * the corresponding bit from original ppfeature masks and input the + * new ppfeature masks. + */ +static ssize_t amdgpu_set_ppfeature_status(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 = ddev->dev_private; + uint64_t featuremask; + int ret; + + ret = kstrtou64(buf, 0, &featuremask); + if (ret) + return -EINVAL; + + pr_debug("featuremask = 0x%llx\n", featuremask); + + if (adev->powerplay.pp_funcs->set_ppfeature_status) { + ret = amdgpu_dpm_set_ppfeature_status(adev, featuremask); + if (ret) + return -EINVAL; + } + + return count; +} + +static ssize_t amdgpu_get_ppfeature_status(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct drm_device *ddev = dev_get_drvdata(dev); + struct amdgpu_device *adev = ddev->dev_private; + + if (adev->powerplay.pp_funcs->get_ppfeature_status) + return amdgpu_dpm_get_ppfeature_status(adev, buf); + + return snprintf(buf, PAGE_SIZE, "\n"); +} + +/** * DOC: pp_dpm_sclk pp_dpm_mclk pp_dpm_pcie * * The amdgpu driver provides a sysfs API for adjusting what power levels @@ -1051,6 +1105,9 @@ static DEVICE_ATTR(pp_od_clk_voltage, S_IRUGO | S_IWUSR, static DEVICE_ATTR(gpu_busy_percent, S_IRUGO, amdgpu_get_busy_percent, NULL); static DEVICE_ATTR(pcie_bw, S_IRUGO, amdgpu_get_pcie_bw, NULL); +static DEVICE_ATTR(ppfeatures, S_IRUGO | S_IWUSR, + amdgpu_get_ppfeature_status, + amdgpu_set_ppfeature_status); static ssize_t amdgpu_hwmon_show_temp(struct device *dev, struct device_attribute *attr, @@ -2241,6 +2298,17 @@ int amdgpu_pm_sysfs_init(struct amdgpu_device *adev) return ret; } + if ((adev->asic_type >= CHIP_VEGA10) && + !(adev->flags & AMD_IS_APU)) { + ret = device_create_file(adev->dev, + &dev_attr_ppfeatures); + if (ret) { + DRM_ERROR("failed to create device file " + "ppfeatures\n"); + return ret; + } + } + adev->pm.sysfs_initialized = true; return 0; @@ -2276,6 +2344,9 @@ void amdgpu_pm_sysfs_fini(struct amdgpu_device *adev) device_remove_file(adev->dev, &dev_attr_gpu_busy_percent); if (adev->flags & !AMD_IS_APU) device_remove_file(adev->dev, &dev_attr_pcie_bw); + if ((adev->asic_type >= CHIP_VEGA10) && + !(adev->flags & AMD_IS_APU)) + device_remove_file(adev->dev, &dev_attr_ppfeatures); } void amdgpu_pm_compute_clocks(struct amdgpu_device *adev) |