Re: [PATCH v4 10/17] platform/x86/amd/pmf: Add facility to dump TA inputs

["Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>]

On Wed, 18 Oct 2023, Shyam Sundar S K wrote:

> PMF driver sends constant inputs to TA which its gets via the other
> subsystems in the kernel. To debug certain TA issues knowing what inputs
> being sent to TA becomes critical. Add debug facility to the driver which
> can isolate Smart PC and TA related issues.
> 
> Also, make source_as_str() as non-static function as this helper is
> required outside of sps.c file.
> 
> Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
> Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
> ---
>  drivers/platform/x86/amd/pmf/pmf.h    |  3 +++
>  drivers/platform/x86/amd/pmf/spc.c    | 37 +++++++++++++++++++++++++++
>  drivers/platform/x86/amd/pmf/tee-if.c |  1 +
>  3 files changed, 41 insertions(+)
> 
> diff --git a/drivers/platform/x86/amd/pmf/pmf.h b/drivers/platform/x86/amd/pmf/pmf.h
> index 216a9f795436..593930519039 100644
> --- a/drivers/platform/x86/amd/pmf/pmf.h
> +++ b/drivers/platform/x86/amd/pmf/pmf.h
> @@ -602,6 +602,7 @@ bool is_pprof_balanced(struct amd_pmf_dev *pmf);
>  int amd_pmf_power_slider_update_event(struct amd_pmf_dev *dev);
>  const char *amd_pmf_source_as_str(unsigned int state);
>  
> +const char *amd_pmf_source_as_str(unsigned int state);
>  
>  int apmf_update_fan_idx(struct amd_pmf_dev *pdev, bool manual, u32 idx);
>  int amd_pmf_set_sps_power_limits(struct amd_pmf_dev *pmf);
> @@ -632,4 +633,6 @@ int apmf_check_smart_pc(struct amd_pmf_dev *pmf_dev);
>  
>  /* Smart PC - TA interfaces */
>  void amd_pmf_populate_ta_inputs(struct amd_pmf_dev *dev, struct ta_pmf_enact_table *in);
> +void amd_pmf_dump_ta_inputs(struct amd_pmf_dev *dev, struct ta_pmf_enact_table *in);
> +
>  #endif /* PMF_H */
> diff --git a/drivers/platform/x86/amd/pmf/spc.c b/drivers/platform/x86/amd/pmf/spc.c
> index bd5061fdfdbe..512e0c66efdc 100644
> --- a/drivers/platform/x86/amd/pmf/spc.c
> +++ b/drivers/platform/x86/amd/pmf/spc.c
> @@ -14,6 +14,43 @@
>  #include <linux/units.h>
>  #include "pmf.h"
>  
> +#ifdef CONFIG_AMD_PMF_DEBUG
> +static const char *ta_slider_as_str(unsigned int state)
> +{
> +	switch (state) {
> +	case TA_BEST_PERFORMANCE:
> +		return "PERFORMANCE";
> +	case TA_BETTER_PERFORMANCE:
> +		return "BALANCED";
> +	case TA_BEST_BATTERY:
> +		return "POWER_SAVER";
> +	default:
> +		return "Unknown TA Slider State";
> +	}
> +}
> +
> +void amd_pmf_dump_ta_inputs(struct amd_pmf_dev *dev, struct ta_pmf_enact_table *in)
> +{
> +	dev_dbg(dev->dev, "==== TA inputs START ====\n");
> +	dev_dbg(dev->dev, "Slider State : %s\n", ta_slider_as_str(in->ev_info.power_slider));
> +	dev_dbg(dev->dev, "Power Source : %s\n", amd_pmf_source_as_str(in->ev_info.power_source));
> +	dev_dbg(dev->dev, "Battery Percentage : %u\n", in->ev_info.bat_percentage);
> +	dev_dbg(dev->dev, "Designed Battery Capacity : %u\n", in->ev_info.bat_design);
> +	dev_dbg(dev->dev, "Fully Charged Capacity : %u\n", in->ev_info.full_charge_capacity);
> +	dev_dbg(dev->dev, "Drain Rate : %d\n", in->ev_info.drain_rate);
> +	dev_dbg(dev->dev, "Socket Power : %u\n", in->ev_info.socket_power);
> +	dev_dbg(dev->dev, "Skin Temperature : %u\n", in->ev_info.skin_temperature);
> +	dev_dbg(dev->dev, "Avg C0 Residency : %u\n", in->ev_info.avg_c0residency);
> +	dev_dbg(dev->dev, "Max C0 Residency : %u\n", in->ev_info.max_c0residency);
> +	dev_dbg(dev->dev, "GFX Busy : %u\n", in->ev_info.gfx_busy);
> +	dev_dbg(dev->dev, "Connected Display Count : %u\n", in->ev_info.monitor_count);
> +	dev_dbg(dev->dev, "LID State : %s\n", in->ev_info.lid_state ? "Close" : "Open");

"open" / "closed" is generic enough that I think it would warrant adding
include/linux/string_choices.h helper for it (it should be lowercase 
there but that difference probably is not an issue for these debug 
prints).

I'd also remove that extra space before :.

-- 
 i.

> +	dev_dbg(dev->dev, "==== TA inputs END ====\n");
> +}
> +#else
> +void amd_pmf_dump_ta_inputs(struct amd_pmf_dev *dev, struct ta_pmf_enact_table *in) {}
> +#endif
> +
>  static void amd_pmf_get_smu_info(struct amd_pmf_dev *dev, struct ta_pmf_enact_table *in)
>  {
>  	u16 max, avg = 0;
> diff --git a/drivers/platform/x86/amd/pmf/tee-if.c b/drivers/platform/x86/amd/pmf/tee-if.c
> index d48f980fb1db..0eba258f4040 100644
> --- a/drivers/platform/x86/amd/pmf/tee-if.c
> +++ b/drivers/platform/x86/amd/pmf/tee-if.c
> @@ -182,6 +182,7 @@ static int amd_pmf_invoke_cmd_enact(struct amd_pmf_dev *dev)
>  	}
>  
>  	if (ta_sm->pmf_result == TA_PMF_TYPE_SUCCESS && out->actions_count) {
> +		amd_pmf_dump_ta_inputs(dev, in);
>  		dev_dbg(dev->dev, "action count:%u result:%x\n", out->actions_count,
>  			ta_sm->pmf_result);
>  		amd_pmf_apply_policies(dev, out);
>