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platform/x86: ISST: Optimize suspend/resume callbacks

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If SST-CP or SST-PP is not supported then don't store configuration
during suspend callback and restore during resume callback.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://patch.msgid.link/20260107061649.1634737-1-srinivas.pandruvada@linux.intel.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
This commit is contained in:
Srinivas Pandruvada 2026-01-06 22:16:49 -08:00 committed by Ilpo Järvinen
parent 69cd1ca440
commit 932ca9b7b4
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GPG Key ID: 59AC4F6153E5CE31
1 changed files with 17 additions and 0 deletions
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17
drivers/platform/x86/intel/speed_select_if/isst_tpmi_core.c
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@ -1721,6 +1721,9 @@ void tpmi_sst_dev_remove(struct auxiliary_device *auxdev)
}
EXPORT_SYMBOL_NS_GPL(tpmi_sst_dev_remove, "INTEL_TPMI_SST");
#define SST_PP_CAP_CP_ENABLE BIT(0)
#define SST_PP_CAP_PP_ENABLE BIT(1)
void tpmi_sst_dev_suspend(struct auxiliary_device *auxdev)
{
struct tpmi_sst_struct *tpmi_sst = auxiliary_get_drvdata(auxdev);
@ -1741,6 +1744,9 @@ void tpmi_sst_dev_suspend(struct auxiliary_device *auxdev)
if (!pd_info || !pd_info->sst_base)
continue;
if (!(pd_info->sst_header.cap_mask & SST_PP_CAP_CP_ENABLE))
goto process_pp_suspend;
cp_base = pd_info->sst_base + pd_info->sst_header.cp_offset;
pd_info->saved_sst_cp_control = readq(cp_base + SST_CP_CONTROL_OFFSET);
memcpy_fromio(pd_info->saved_clos_configs, cp_base + SST_CLOS_CONFIG_0_OFFSET,
@ -1748,6 +1754,10 @@ void tpmi_sst_dev_suspend(struct auxiliary_device *auxdev)
memcpy_fromio(pd_info->saved_clos_assocs, cp_base + SST_CLOS_ASSOC_0_OFFSET,
sizeof(pd_info->saved_clos_assocs));
process_pp_suspend:
if (!(pd_info->sst_header.cap_mask & SST_PP_CAP_PP_ENABLE))
continue;
pd_info->saved_pp_control = readq(pd_info->sst_base +
pd_info->sst_header.pp_offset +
SST_PP_CONTROL_OFFSET);
@ -1775,6 +1785,9 @@ void tpmi_sst_dev_resume(struct auxiliary_device *auxdev)
if (!pd_info || !pd_info->sst_base)
continue;
if (!(pd_info->sst_header.cap_mask & SST_PP_CAP_CP_ENABLE))
goto process_pp_resume;
cp_base = pd_info->sst_base + pd_info->sst_header.cp_offset;
writeq(pd_info->saved_sst_cp_control, cp_base + SST_CP_CONTROL_OFFSET);
memcpy_toio(cp_base + SST_CLOS_CONFIG_0_OFFSET, pd_info->saved_clos_configs,
@ -1782,6 +1795,10 @@ void tpmi_sst_dev_resume(struct auxiliary_device *auxdev)
memcpy_toio(cp_base + SST_CLOS_ASSOC_0_OFFSET, pd_info->saved_clos_assocs,
sizeof(pd_info->saved_clos_assocs));
process_pp_resume:
if (!(pd_info->sst_header.cap_mask & SST_PP_CAP_PP_ENABLE))
continue;
writeq(pd_info->saved_pp_control, power_domain_info->sst_base +
pd_info->sst_header.pp_offset + SST_PP_CONTROL_OFFSET);
}