linux-kernel - Re: [PATCH 8/9] platform/x86: intel_pmc_core: Add LTR registers for Tiger Lake

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Message-ID: <CAE2upjT6X1cNvoX8HNFkGHP_aDA1t=JngHFPDUjQ1Y0teuErvQ@mail.gmail.com>
Date:   Wed, 7 Apr 2021 11:48:14 -0400
From:   Rajneesh Bhardwaj <irenic.rajneesh@...il.com>
To:     "David E. Box" <david.e.box@...ux.intel.com>
Cc:     hdegoede@...hat.com, mgross@...ux.intel.com,
        gayatri.kammela@...el.com, platform-driver-x86@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 8/9] platform/x86: intel_pmc_core: Add LTR registers for
 Tiger Lake

Acked-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@...el.com>

On Wed, Mar 31, 2021 at 11:06 PM David E. Box
<david.e.box@...ux.intel.com> wrote:
>
> From: Gayatri Kammela <gayatri.kammela@...el.com>
>
> Just like Ice Lake, Tiger Lake uses Cannon Lake's LTR information
> and supports a few additional registers. Hence add the LTR registers
> specific to Tiger Lake to the cnp_ltr_show_map[].
>
> Also adjust the number of LTR IPs for Tiger Lake to the correct amount.
>
> Signed-off-by: Gayatri Kammela <gayatri.kammela@...el.com>
> Signed-off-by: David E. Box <david.e.box@...ux.intel.com>
> ---
>  drivers/platform/x86/intel_pmc_core.c | 2 ++
>  drivers/platform/x86/intel_pmc_core.h | 4 +++-
>  2 files changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/platform/x86/intel_pmc_core.c b/drivers/platform/x86/intel_pmc_core.c
> index 458c0056e7a1..9168062c927e 100644
> --- a/drivers/platform/x86/intel_pmc_core.c
> +++ b/drivers/platform/x86/intel_pmc_core.c
> @@ -383,6 +383,8 @@ static const struct pmc_bit_map cnp_ltr_show_map[] = {
>          * a list of core SoCs using this.
>          */
>         {"WIGIG",               ICL_PMC_LTR_WIGIG},
> +       {"THC0",                TGL_PMC_LTR_THC0},
> +       {"THC1",                TGL_PMC_LTR_THC1},
>         /* Below two cannot be used for LTR_IGNORE */
>         {"CURRENT_PLATFORM",    CNP_PMC_LTR_CUR_PLT},
>         {"AGGREGATED_SYSTEM",   CNP_PMC_LTR_CUR_ASLT},
> diff --git a/drivers/platform/x86/intel_pmc_core.h b/drivers/platform/x86/intel_pmc_core.h
> index f41f61aa7008..634130b589a2 100644
> --- a/drivers/platform/x86/intel_pmc_core.h
> +++ b/drivers/platform/x86/intel_pmc_core.h
> @@ -192,8 +192,10 @@ enum ppfear_regs {
>  #define ETR3_CLEAR_LPM_EVENTS_BIT              28
>  #define LPM_STS_LATCH_MODE_BIT                 31
>
> -#define TGL_NUM_IP_IGN_ALLOWED                 22
>  #define TGL_PMC_SLP_S0_RES_COUNTER_STEP                0x7A
> +#define TGL_PMC_LTR_THC0                       0x1C04
> +#define TGL_PMC_LTR_THC1                       0x1C08
> +#define TGL_NUM_IP_IGN_ALLOWED                 23
>  #define TGL_PMC_LPM_RES_COUNTER_STEP_X2                61      /* 30.5us * 2 */
>
>  /*
> --
> 2.25.1
>


-- 
Thanks,
Rajneesh