On Fri, Apr 20, 2018 at 2:16 AM, Zhu, Rex <Rex.Zhu at amd.com> wrote: > Hi Alex, > >> There will be a '*' next to the level that is currently active. > > We need to add a level for deep sleep state. > Otherwise, On Vega/Rv, when gpu in deepsleep, we can't set "*" for the current level. I dropped that sentence for now. We can revisit it later. Thanks! Alex > > > Best Regards > Rex > > -----Original Message----- > From: amd-gfx [mailto:amd-gfx-bounces at lists.freedesktop.org] On Behalf Of Alex Deucher > Sent: Friday, April 20, 2018 4:05 AM > To: amd-gfx at lists.freedesktop.org > Cc: Deucher, Alexander > Subject: [PATCH 4/6] drm/amdgpu/pm: document pp_dpm_sclk pp_dpm_mclk pp_dpm_pcie > > Used for manually masking dpm states. > > Signed-off-by: Alex Deucher <alexander.deucher at amd.com> > --- > drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c | 18 ++++++++++++++++++ > 1 file changed, 18 insertions(+) > > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c > index 9982f1b1f8c4..3f1715b1a547 100644 > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c > @@ -539,6 +539,24 @@ 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. There > + * will be a '*' next to the level that is currently active. > + * > + * 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) > -- > 2.13.6 > > _______________________________________________ > amd-gfx mailing list > amd-gfx at lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/amd-gfx
