[PATCH 3/3] Documentation/amdgpu: Modify pp_dpm_*clk details

[Alex Deucher]

On Mon, Sep 4, 2023 at 9:20 AM Lijo Lazar <lijo.lazar at amd.com> wrote:
>
> pp_dpm_*clk nodes also could show the frequencies when a clock is in
> 'sleep' state. Add documentation related to that.
>
> Signed-off-by: Lijo Lazar <lijo.lazar at amd.com>
> ---
>  drivers/gpu/drm/amd/pm/amdgpu_pm.c | 10 +++++++++-
>  1 file changed, 9 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/pm/amdgpu_pm.c b/drivers/gpu/drm/amd/pm/amdgpu_pm.c
> index 84e1af6a6ce7..3dca1aa473c8 100644
> --- a/drivers/gpu/drm/amd/pm/amdgpu_pm.c
> +++ b/drivers/gpu/drm/amd/pm/amdgpu_pm.c
> @@ -983,7 +983,15 @@ static ssize_t amdgpu_get_pp_features(struct device *dev,
>   * pp_dpm_fclk interface is only available for Vega20 and later ASICs.
>   *
>   * Reading back the files will show you the available power levels within
> - * the power state and the clock information for those levels.
> + * the power state and the clock information for those levels. If deep sleep is
> + * applied to a clock, the level will be denoted by a special level 'S:'
> + * E.g.,
> + *     S: 19Mhz *
> + *     0: 615Mhz
> + *     1: 800Mhz
> + *     2: 888Mhz
> + *     3: 1000Mhz
> + *
>   *
>   * To manually adjust these states, first select manual using
>   * power_dpm_force_performance_level.

Might be nice to update older asics to follow this model as well at some point.

Alex

> --
> 2.25.1
>