diff options
Diffstat (limited to 'drivers/gpu/drm/amd/pm/amdgpu_pm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/pm/amdgpu_pm.c | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/drivers/gpu/drm/amd/pm/amdgpu_pm.c b/drivers/gpu/drm/amd/pm/amdgpu_pm.c index da0da03569e8..a57952b93e73 100644 --- a/drivers/gpu/drm/amd/pm/amdgpu_pm.c +++ b/drivers/gpu/drm/amd/pm/amdgpu_pm.c @@ -678,7 +678,12 @@ static ssize_t amdgpu_set_pp_table(struct device *dev, * clock labeled OD_MCLK * * - three <frequency, voltage> points labeled OD_VDDC_CURVE. - * They can be used to calibrate the sclk voltage curve. + * They can be used to calibrate the sclk voltage curve. This is + * available for Vega20 and NV1X. + * + * - voltage offset for the six anchor points of the v/f curve labeled + * OD_VDDC_CURVE. They can be used to calibrate the v/f curve. This + * is only availabe for some SMU13 ASICs. * * - voltage offset(in mV) applied on target voltage calculation. * This is available for Sienna Cichlid, Navy Flounder and Dimgrey @@ -719,12 +724,19 @@ static ssize_t amdgpu_set_pp_table(struct device *dev, * 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 - * points are indexed by 0, 1 and 2. E.g., "vc 0 300 600" will - * update point1 with clock set as 300Mhz and voltage as - * 600mV. "vc 2 1000 1000" will update point3 with clock set - * as 1000Mhz and voltage 1000mV. + * For sclk voltage curve, + * - For NV1X, enter the new values by writing a string that + * contains "vc point clock voltage" to the file. The points + * are indexed by 0, 1 and 2. E.g., "vc 0 300 600" will update + * point1 with clock set as 300Mhz and voltage as 600mV. "vc 2 + * 1000 1000" will update point3 with clock set as 1000Mhz and + * voltage 1000mV. + * - For SMU13 ASICs, enter the new values by writing a string that + * contains "vc anchor_point_index voltage_offset" to the file. + * There are total six anchor points defined on the v/f curve with + * index as 0 - 5. + * - "vc 0 10" will update the voltage offset for point1 as 10mv. + * - "vc 5 -10" will update the voltage offset for point6 as -10mv. * * To update the voltage offset applied for gfxclk/voltage calculation, * enter the new value by writing a string that contains "vo offset". |