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. Best Regards Rex -----Original Message----- From: amd-gfx [mailto:amd-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx] 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
