Re: [PATCH v8 4/4] platform/x86/intel/pmc: core: Report duration of time in HW sleep state

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

On Wed, 12 Apr 2023, Mario Limonciello wrote:

> intel_pmc_core displays a warning when the module parameter
> `warn_on_s0ix_failures` is set and a suspend didn't get to a HW sleep
> state.
> 
> Report this to the standard kernel reporting infrastructure so that
> userspace software can query after the suspend cycle is done.
> 
> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
> ---
> v7->v8:
>  * Report max sleep as well
> ---
>  drivers/platform/x86/intel/pmc/core.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/platform/x86/intel/pmc/core.c b/drivers/platform/x86/intel/pmc/core.c
> index 925c5d676a43..f9677104353d 100644
> --- a/drivers/platform/x86/intel/pmc/core.c
> +++ b/drivers/platform/x86/intel/pmc/core.c
> @@ -1153,6 +1153,7 @@ static int pmc_core_probe(struct platform_device *pdev)
>  	pmc_core_do_dmi_quirks(pmcdev);
>  
>  	pmc_core_dbgfs_register(pmcdev);
> +	pm_report_max_hw_sleep(((1UL << 32) - 1) * pmc_core_adjust_slp_s0_step(pmcdev, 1));

Technically this is FIELD_MAX(SLP_S0_RES_COUNTER_MASK) * pmc_core_adjust...? 
Where the define is:
#define SLP_S0_RES_COUNTER_MASK	GENMASK(31, 0)

>  
>  	device_initialized = true;
>  	dev_info(&pdev->dev, " initialized\n");
> @@ -1214,6 +1215,8 @@ static inline bool pmc_core_is_s0ix_failed(struct pmc_dev *pmcdev)
>  	if (pmc_core_dev_state_get(pmcdev, &s0ix_counter))
>  		return false;
>  
> +	pm_report_hw_sleep_time((u32)(s0ix_counter - pmcdev->s0ix_counter));
> +
>  	if (s0ix_counter == pmcdev->s0ix_counter)
>  		return true;
>  
> 

-- 
 i.