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platform/x86/intel/pmc: Add ssram_init flag in PMC discovery in Meteor Lake

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If PMC discovery using pmc_core_ssram_init() was unsuccessful for the
Meteor Lake platform, the legacy enumeration method is used. In this
case pci device struct for the PMC SSRAM is not available
and pmc_core_ssram_get_lpm_reqs() will not work. Add ssram_init flag to
indicate if the PMC SSRAM initialization was successful or not. Call
pmc_core_ssram_get_lpm_reqs() only if the ssram_init flag is set to true.

Signed-off-by: Rajvi Jingar <rajvi.jingar@linux.intel.com>
Link: https://lore.kernel.org/r/20231219042216.2592029-6-rajvi.jingar@linux.intel.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Rajvi Jingar 2023-12-18 20:22:14 -08:00 committed by Hans de Goede
parent d79c3c82ee
commit 1d62ada48d
1 changed files with 6 additions and 1 deletions
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7
drivers/platform/x86/intel/pmc/mtl.c
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@ -994,6 +994,7 @@ int mtl_core_init(struct pmc_dev *pmcdev)
struct pmc *pmc = pmcdev->pmcs[PMC_IDX_SOC];
int ret;
int func = 2;
bool ssram_init = true;
mtl_d3_fixup();
@ -1006,6 +1007,7 @@ int mtl_core_init(struct pmc_dev *pmcdev)
*/
ret = pmc_core_ssram_init(pmcdev, func);
if (ret) {
ssram_init = false;
dev_warn(&pmcdev->pdev->dev,
"ssram init failed, %d, using legacy init\n", ret);
pmc->map = &mtl_socm_reg_map;
@ -1023,5 +1025,8 @@ int mtl_core_init(struct pmc_dev *pmcdev)
dev_dbg(&pmcdev->pdev->dev, "ignoring GBE LTR\n");
pmc_core_send_ltr_ignore(pmcdev, 3);
return pmc_core_ssram_get_lpm_reqs(pmcdev);
if (ssram_init)
return pmc_core_ssram_get_lpm_reqs(pmcdev);
return 0;
}