• Xiaojian Du's avatar
    drm/amd/powerplay: add one sysfs file to support the feature to modify gfx... · 12a6727d
    Xiaojian Du authored
    drm/amd/powerplay: add one sysfs file to support the feature to modify gfx clock on Raven/Raven2/Picasso APU.
    
    This patch is to add one sysfs file -- "pp_od_clk_voltage" for
    Raven/Raven2/Picasso APU, which is only used by dGPU like VEGA10.
    This sysfs file supports the feature to modify gfx engine clock(Mhz units), it can
    be used to configure the min value and the max value for gfx clock limited in the
    safe range.
    
    Command guide:
    echo "s level clock" > pp_od_clk_voltage
    	s - adjust teh sclk level
    	level - 0 or 1, "0" represents the min value, "1" represents the max value
    	clock - the clock value(Mhz units), like 400, 800 or 1200, the value must be within the
                    OD_RANGE limits.
    Example:
    $ cat pp_od_clk_voltage
    OD_SCLK:
    0:        200Mhz
    1:       1400Mhz
    OD_RANGE:
    SCLK:     200MHz       1400MHz
    
    $ echo "s 0 600" > pp_od_clk_voltage
    $ echo "s 1 1000" > pp_od_clk_voltage
    $ cat pp_od_clk_voltage
    OD_SCLK:
    0:        600Mhz
    1:       1000Mhz
    OD_RANGE:
    SCLK:     200MHz       1400MHz
    Signed-off-by: default avatarXiaojian Du <Xiaojian.Du@amd.com>
    Reviewed-by: default avatarKevin Wang <kevin1.wang@amd.com>
    Reviewed-by: default avatarHuang Rui <ray.huang@amd.com>
    Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
    12a6727d
amdgpu_dpm.h 17.8 KB