[PATCH 2/2] drm/amdgpu/pm: add documentation for pp_od_clock_voltage for vangogh
Alex Deucher
alexander.deucher at amd.com
Fri Apr 30 16:42:32 UTC 2021
Vangogh follows other APUs, but also allows core clock adjustments.
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
drivers/gpu/drm/amd/pm/amdgpu_pm.c | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/pm/amdgpu_pm.c b/drivers/gpu/drm/amd/pm/amdgpu_pm.c
index cbd38f2be958..082b01e872fe 100644
--- a/drivers/gpu/drm/amd/pm/amdgpu_pm.c
+++ b/drivers/gpu/drm/amd/pm/amdgpu_pm.c
@@ -743,6 +743,15 @@ static ssize_t amdgpu_set_pp_table(struct device *dev,
*
* - a list of valid ranges for sclk labeled OD_RANGE
*
+ * < For VanGogh >
+ *
+ * Reading the file will display:
+ *
+ * - minimum and maximum engine clock labeled OD_SCLK
+ * - minimum and maximum core clocks labeled OD_CCLK
+ *
+ * - a list of valid ranges for sclk and cclk labeled OD_RANGE
+ *
* To manually adjust these settings:
*
* - First select manual using power_dpm_force_performance_level
@@ -751,7 +760,10 @@ static ssize_t amdgpu_set_pp_table(struct device *dev,
* string that contains "s/m index clock" to the file. The index
* should be 0 if to set minimum clock. And 1 if to set maximum
* clock. E.g., "s 0 500" will update minimum sclk to be 500 MHz.
- * "m 1 800" will update maximum mclk to be 800Mhz.
+ * "m 1 800" will update maximum mclk to be 800Mhz. For core
+ * clocks on VanGogh, the string contains "p core index clock".
+ * E.g., "p 2 0 800" would set the minimum core clock on core
+ * 2 to 800Mhz.
*
* For sclk voltage curve, enter the new values by writing a
* string that contains "vc point clock voltage" to the file. The
--
2.30.2
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