Commit 271dc908 authored by Alex Deucher's avatar Alex Deucher
Browse files

drm/amdgpu/pm: document pp_dpm_sclk pp_dpm_mclk pp_dpm_pcie (v2) 



Used for manually masking dpm states.

v2: drop comment about current state (Rex)

Acked-by: default avatarFelix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: default avatarHuang Rui <ray.huang@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent d54bb40f

drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c

+17 −0
Original line number Diff line number Diff line
@@ -539,6 +539,23 @@ static ssize_t amdgpu_get_pp_od_clk_voltage(struct device *dev, 


}



/**

 * DOC: pp_dpm_sclk pp_dpm_mclk 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.

 *

 * Reading back the files will show you the available power levels within

 * the power state and the clock information for those levels.

 *

 * To manually adjust these states, first select manual using

 * power_dpm_force_performance_level.  Writing a string of the level

 * numbers to the file will select which levels you want to enable.

 * E.g., writing 456 to the file will enable levels 4, 5, and 6.

 *

 */



static ssize_t amdgpu_get_pp_dpm_sclk(struct device *dev,

		struct device_attribute *attr,

		char *buf)

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