linux-kernel - Re: [PATCH V2 1/2] platform/x86/intel/pmc: Add resume callback

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Message-ID: <934466a0-f519-cd43-7af8-bc744cc746b4@redhat.com>
Date:   Tue, 13 Jun 2023 12:30:31 +0200
From:   Hans de Goede <hdegoede@...hat.com>
To:     "David E. Box" <david.e.box@...ux.intel.com>,
        linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org
Cc:     markgross@...nel.org, irenic.rajneesh@...il.com,
        ilpo.jarvinen@...ux.intel.com, xi.pardee@...el.com,
        rajvi.jingar@...ux.intel.com
Subject: Re: [PATCH V2 1/2] platform/x86/intel/pmc: Add resume callback

Hi,

On 6/8/23 01:38, David E. Box wrote:
> Add a resume callback to perform platform specific functions during resume
> from suspend.
> 
> Signed-off-by: David E. Box <david.e.box@...ux.intel.com>
> ---
> 
> V2 - Change resume_fixup to just resume and use it a a replacement for
>      the regular resume flow (now called pmc_core_resume_common) if it
>      exist. Suggested by Ilpo.


Thank you for your patch-series, I've applied the series to my
review-hans branch:
https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=review-hans

Note it will show up in my review-hans branch once I've pushed my
local branch there, which might take a while.

Once I've run some tests on this branch the patches there will be
added to the platform-drivers-x86/for-next branch and eventually
will be included in the pdx86 pull-request to Linus for the next
merge-window.

Regards,

Hans





>  drivers/platform/x86/intel/pmc/core.c | 14 ++++++++++++--
>  drivers/platform/x86/intel/pmc/core.h |  3 +++
>  2 files changed, 15 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/platform/x86/intel/pmc/core.c b/drivers/platform/x86/intel/pmc/core.c
> index da6e7206d38b..bb2f11251f73 100644
> --- a/drivers/platform/x86/intel/pmc/core.c
> +++ b/drivers/platform/x86/intel/pmc/core.c
> @@ -1223,11 +1223,11 @@ static inline bool pmc_core_is_s0ix_failed(struct pmc_dev *pmcdev)
>  	return false;
>  }
>  
> -static __maybe_unused int pmc_core_resume(struct device *dev)
> +int pmc_core_resume_common(struct pmc_dev *pmcdev)
>  {
> -	struct pmc_dev *pmcdev = dev_get_drvdata(dev);
>  	const struct pmc_bit_map **maps = pmcdev->map->lpm_sts;
>  	int offset = pmcdev->map->lpm_status_offset;
> +	struct device *dev = &pmcdev->pdev->dev;
>  
>  	/* Check if the syspend used S0ix */
>  	if (pm_suspend_via_firmware())
> @@ -1257,6 +1257,16 @@ static __maybe_unused int pmc_core_resume(struct device *dev)
>  	return 0;
>  }
>  
> +static __maybe_unused int pmc_core_resume(struct device *dev)
> +{
> +	struct pmc_dev *pmcdev = dev_get_drvdata(dev);
> +
> +	if (pmcdev->resume)
> +		return pmcdev->resume(pmcdev);
> +
> +	return pmc_core_resume_common(pmcdev);
> +}
> +
>  static const struct dev_pm_ops pmc_core_pm_ops = {
>  	SET_LATE_SYSTEM_SLEEP_PM_OPS(pmc_core_suspend, pmc_core_resume)
>  };
> diff --git a/drivers/platform/x86/intel/pmc/core.h b/drivers/platform/x86/intel/pmc/core.h
> index 9ca9b9746719..7c95586e742b 100644
> --- a/drivers/platform/x86/intel/pmc/core.h
> +++ b/drivers/platform/x86/intel/pmc/core.h
> @@ -327,6 +327,7 @@ struct pmc_reg_map {
>   * @lpm_en_modes:	Array of enabled modes from lowest to highest priority
>   * @lpm_req_regs:	List of substate requirements
>   * @core_configure:	Function pointer to configure the platform
> + * @resume:		Function to perform platform specific resume
>   *
>   * pmc_dev contains info about power management controller device.
>   */
> @@ -345,6 +346,7 @@ struct pmc_dev {
>  	int lpm_en_modes[LPM_MAX_NUM_MODES];
>  	u32 *lpm_req_regs;
>  	void (*core_configure)(struct pmc_dev *pmcdev);
> +	int (*resume)(struct pmc_dev *pmcdev);
>  };
>  
>  extern const struct pmc_bit_map msr_map[];
> @@ -398,6 +400,7 @@ extern const struct pmc_reg_map mtl_reg_map;
>  extern void pmc_core_get_tgl_lpm_reqs(struct platform_device *pdev);
>  extern int pmc_core_send_ltr_ignore(struct pmc_dev *pmcdev, u32 value);
>  
> +int pmc_core_resume_common(struct pmc_dev *pmcdev);
>  void spt_core_init(struct pmc_dev *pmcdev);
>  void cnp_core_init(struct pmc_dev *pmcdev);
>  void icl_core_init(struct pmc_dev *pmcdev);
> 
> base-commit: 86f67fe2db439867f9476c9b78ea3ebd4a06a123