Re: [PATCH v2 11/11] platform/x86:intel/pmc: Get LPM information for Lunar Lake

[Xi Pardee <xi.pardee@xxxxxxxxxxxxxxx>]

On 8/29/2024 5:13 AM, Ilpo Järvinen wrote:
> On Wed, 28 Aug 2024, Xi Pardee wrote:
>
> > Add support to find and read the requirements from the telemetry
> > entries for Lunar Lake platforms.
> >
> > Signed-off-by: Xi Pardee <xi.pardee@xxxxxxxxxxxxxxx>
> > ---
> >   drivers/platform/x86/intel/pmc/lnl.c | 15 +++++++++++++++
> >   1 file changed, 15 insertions(+)
> >
> > diff --git a/drivers/platform/x86/intel/pmc/lnl.c b/drivers/platform/x86/intel/pmc/lnl.c
> > index 109b08d43fc8..f5fee9e105e2 100644
> > --- a/drivers/platform/x86/intel/pmc/lnl.c
> > +++ b/drivers/platform/x86/intel/pmc/lnl.c
> > @@ -13,8 +13,13 @@
> >   
> >   #include "core.h"
> >   
> > +#define SOCM_LPM_REQ_GUID	0x15099748
> > +
> > +static const u8 LNL_LPM_REG_INDEX[] = {0, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14, 15, 16, 20};
> > +
> >   static struct pmc_info lnl_pmc_info_list[] = {
> >   	{
> > +		.guid	= SOCM_LPM_REQ_GUID,
> >   		.devid	= PMC_DEVID_LNL_SOCM,
> >   		.map	= &lnl_socm_reg_map,
> >   	},
> > @@ -536,6 +541,7 @@ const struct pmc_reg_map lnl_socm_reg_map = {
> >   	.lpm_live_status_offset = MTL_LPM_LIVE_STATUS_OFFSET,
> >   	.s0ix_blocker_maps = lnl_blk_maps,
> >   	.s0ix_blocker_offset = LNL_S0IX_BLOCKER_OFFSET,
> > +	.lpm_reg_index = LNL_LPM_REG_INDEX,
> >   };
> >   
> >   #define LNL_NPU_PCI_DEV		0x643e
> > @@ -561,6 +567,8 @@ static int lnl_resume(struct pmc_dev *pmcdev)
> >   
> >   int lnl_core_init(struct pmc_dev *pmcdev)
> >   {
> > +	bool ssram_init = true;
> > +	int func = 2;
> >   	int ret;
> >   	struct pmc *pmc = pmcdev->pmcs[PMC_IDX_SOC];
> >   
> > @@ -578,6 +586,7 @@ int lnl_core_init(struct pmc_dev *pmcdev)
> >   
> >   	/* If regbase not assigned, set map and discover using legacy method */
> >   	if (ret) {
> > +		ssram_init = false;
> >   		pmc->map = &lnl_socm_reg_map;
> >   		ret = get_primary_reg_base(pmc);
> >   		if (ret)
> > @@ -586,5 +595,11 @@ int lnl_core_init(struct pmc_dev *pmcdev)
> >   
> >   	pmc_core_get_low_power_modes(pmcdev);
> >   
> > +	if (ssram_init)	{
> > +		ret = pmc_core_ssram_get_lpm_reqs(pmcdev, func);
> > +		if (ret)
> > +			return ret;
> There's quite much duplication related to this legacy/ssram init in
> the per arch core init functions. And some inconsistencies too which
> seem incidental such as mtl.c using return directly here.
I will try to extract the duplicate code to a common function and remove 
the
inconsistencies between different architecture in next version.

Xi