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-rw-r--r--drivers/gpu/drm/amd/pm/amdgpu_pm.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/pm/amdgpu_pm.c b/drivers/gpu/drm/amd/pm/amdgpu_pm.c
index e789a48089ad..2807f3bd9ebe 100644
--- a/drivers/gpu/drm/amd/pm/amdgpu_pm.c
+++ b/drivers/gpu/drm/amd/pm/amdgpu_pm.c
@@ -983,7 +983,15 @@ static ssize_t amdgpu_get_pp_features(struct device *dev,
* pp_dpm_fclk interface is only available for Vega20 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.
+ * the power state and the clock information for those levels. If deep sleep is
+ * applied to a clock, the level will be denoted by a special level 'S:'
+ * E.g.,
+ * S: 19Mhz *
+ * 0: 615Mhz
+ * 1: 800Mhz
+ * 2: 888Mhz
+ * 3: 1000Mhz
+ *
*
* To manually adjust these states, first select manual using
* power_dpm_force_performance_level.