drm/amd/powerplay: support retrieving and adjusting SOC clock power levels V2
User can use "pp_dpm_socclk" to retrieve and adjust SOC clock power
levels.
V2: expose this interface for Vega10 and later ASICs only
Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
index f21f294..4bdb1d0 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
@@ -680,11 +680,13 @@ static ssize_t amdgpu_get_ppfeature_status(struct device *dev,
}
/**
- * DOC: pp_dpm_sclk pp_dpm_mclk pp_dpm_pcie
+ * DOC: pp_dpm_sclk pp_dpm_mclk pp_dpm_socclk pp_dpm_pcie
*
* The amdgpu driver provides a sysfs API for adjusting what power levels
* are enabled for a given power state. The files pp_dpm_sclk, pp_dpm_mclk,
- * and pp_dpm_pcie are used for this.
+ * pp_dpm_socclk and pp_dpm_pcie are used for this.
+ *
+ * pp_dpm_socclk interface is only available for Vega10 and later ASICs.
*
* Reading back the files will show you the available power levels within
* the power state and the clock information for those levels.
@@ -804,6 +806,42 @@ static ssize_t amdgpu_set_pp_dpm_mclk(struct device *dev,
return count;
}
+static ssize_t amdgpu_get_pp_dpm_socclk(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->print_clock_levels)
+ return amdgpu_dpm_print_clock_levels(adev, PP_SOCCLK, buf);
+ else
+ return snprintf(buf, PAGE_SIZE, "\n");
+}
+
+static ssize_t amdgpu_set_pp_dpm_socclk(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;
+ int ret;
+ uint32_t mask = 0;
+
+ ret = amdgpu_read_mask(buf, count, &mask);
+ if (ret)
+ return ret;
+
+ if (adev->powerplay.pp_funcs->force_clock_level)
+ ret = amdgpu_dpm_force_clock_level(adev, PP_SOCCLK, mask);
+
+ if (ret)
+ return -EINVAL;
+
+ return count;
+}
+
static ssize_t amdgpu_get_pp_dpm_pcie(struct device *dev,
struct device_attribute *attr,
char *buf)
@@ -1087,6 +1125,9 @@ static DEVICE_ATTR(pp_dpm_sclk, S_IRUGO | S_IWUSR,
static DEVICE_ATTR(pp_dpm_mclk, S_IRUGO | S_IWUSR,
amdgpu_get_pp_dpm_mclk,
amdgpu_set_pp_dpm_mclk);
+static DEVICE_ATTR(pp_dpm_socclk, S_IRUGO | S_IWUSR,
+ amdgpu_get_pp_dpm_socclk,
+ amdgpu_set_pp_dpm_socclk);
static DEVICE_ATTR(pp_dpm_pcie, S_IRUGO | S_IWUSR,
amdgpu_get_pp_dpm_pcie,
amdgpu_set_pp_dpm_pcie);
@@ -2246,6 +2287,13 @@ int amdgpu_pm_sysfs_init(struct amdgpu_device *adev)
DRM_ERROR("failed to create device file pp_dpm_mclk\n");
return ret;
}
+ if (adev->asic_type >= CHIP_VEGA10) {
+ ret = device_create_file(adev->dev, &dev_attr_pp_dpm_socclk);
+ if (ret) {
+ DRM_ERROR("failed to create device file pp_dpm_socclk\n");
+ return ret;
+ }
+ }
ret = device_create_file(adev->dev, &dev_attr_pp_dpm_pcie);
if (ret) {
DRM_ERROR("failed to create device file pp_dpm_pcie\n");
@@ -2333,6 +2381,8 @@ void amdgpu_pm_sysfs_fini(struct amdgpu_device *adev)
device_remove_file(adev->dev, &dev_attr_pp_dpm_sclk);
device_remove_file(adev->dev, &dev_attr_pp_dpm_mclk);
+ if (adev->asic_type >= CHIP_VEGA10)
+ device_remove_file(adev->dev, &dev_attr_pp_dpm_socclk);
device_remove_file(adev->dev, &dev_attr_pp_dpm_pcie);
device_remove_file(adev->dev, &dev_attr_pp_sclk_od);
device_remove_file(adev->dev, &dev_attr_pp_mclk_od);
