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platform/x86/intel/pmc: Add support for variable DMU offsets

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Add support for handling different DMU Die C6 offsets across platforms.
The previous implementation assumed a uniform DMU Die C6 offset for all
platforms, which is no longer valid after an upcoming change.

Signed-off-by: Xi Pardee <xi.pardee@linux.intel.com>
Link: https://patch.msgid.link/20260505043342.2573556-6-xi.pardee@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:
Xi Pardee 2026-05-04 21:33:36 -07:00 committed by Ilpo Järvinen
parent 11de0586ec
commit ebbf333808
No known key found for this signature in database
GPG Key ID: 59AC4F6153E5CE31
4 changed files with 6 additions and 1 deletions
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2
drivers/platform/x86/intel/pmc/arl.c
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@ -729,6 +729,7 @@ struct pmc_dev_info arl_pmc_dev = {
.init = arl_core_init,
.sub_req = pmc_core_pmt_get_lpm_req,
.ssram_hidden = true,
.die_c6_offset = MTL_PMT_DMU_DIE_C6_OFFSET,
};
static u32 ARL_H_PMT_DMU_GUIDS[] = {ARL_PMT_DMU_GUID, ARL_H_PMT_DMU_GUID, 0x0};
@ -742,4 +743,5 @@ struct pmc_dev_info arl_h_pmc_dev = {
.init = arl_h_core_init,
.sub_req = pmc_core_pmt_get_lpm_req,
.ssram_hidden = true,
.die_c6_offset = MTL_PMT_DMU_DIE_C6_OFFSET,
};

2
drivers/platform/x86/intel/pmc/core.c
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@ -1381,7 +1381,7 @@ void pmc_core_punit_pmt_init(struct pmc_dev *pmcdev, struct pmc_dev_info *pmc_de
}
pmcdev->punit_ep = ep;
pmcdev->die_c6_offset = MTL_PMT_DMU_DIE_C6_OFFSET;
pmcdev->die_c6_offset = pmc_dev_info->die_c6_offset;
}
if (pmc_dev_info->pc_guid) {

2
drivers/platform/x86/intel/pmc/core.h
View File

@ -514,6 +514,7 @@ enum pmc_index {
* @init: Function to perform platform specific init action
* @sub_req: Function to achieve low power mode substate requirements
* @ssram_hidden: Some SSRAM devices are hidden on this platform
* @die_c6_offset: Telemetry offset to read Die C6 residency
*/
struct pmc_dev_info {
u32 *dmu_guids;
@ -530,6 +531,7 @@ struct pmc_dev_info {
int (*init)(struct pmc_dev *pmcdev, struct pmc_dev_info *pmc_dev_info);
int (*sub_req)(struct pmc_dev *pmcdev, struct pmc *pmc, struct telem_endpoint *ep);
bool ssram_hidden;
u32 die_c6_offset;
};
extern const struct pmc_bit_map msr_map[];

1
drivers/platform/x86/intel/pmc/mtl.c
View File

@ -1003,4 +1003,5 @@ struct pmc_dev_info mtl_pmc_dev = {
.init = mtl_core_init,
.sub_req = pmc_core_pmt_get_lpm_req,
.ssram_hidden = true,
.die_c6_offset = MTL_PMT_DMU_DIE_C6_OFFSET,
};