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platform/x86/intel/pmc: core: Always capture counters on suspend 

Currently counters are only captured during suspend when the
warn_on_s0ix_failures module parameter is set.

In order to relay this counter information to the kernel reporting
infrastructure adjust it so that the counters are always captured.

warn_on_s0ix_failures will be utilized solely for messaging by
the driver instead.

Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: David E. Box <david.e.box@linux.intel.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Mario Limonciello 2023-04-17 10:27:07 -05:00 committed by Rafael J. Wysocki
parent 09f5df3fb8
commit e2348afe70
2 changed files with 5 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/platform/x86/intel/pmc/core.c
View File

@ -1179,12 +1179,6 @@ static __maybe_unused int pmc_core_suspend(struct device *dev)
{
struct pmc_dev *pmcdev = dev_get_drvdata(dev);
pmcdev->check_counters = false;
/* No warnings on S0ix failures */
if (!warn_on_s0ix_failures)
return 0;
/* Check if the syspend will actually use S0ix */
if (pm_suspend_via_firmware())
return 0;
@ -1197,7 +1191,6 @@ static __maybe_unused int pmc_core_suspend(struct device *dev)
if (pmc_core_dev_state_get(pmcdev, &pmcdev->s0ix_counter))
return -EIO;
pmcdev->check_counters = true;
return 0;
}
@ -1233,12 +1226,16 @@ static __maybe_unused int pmc_core_resume(struct device *dev)
const struct pmc_bit_map **maps = pmcdev->map->lpm_sts;
int offset = pmcdev->map->lpm_status_offset;
if (!pmcdev->check_counters)
/* Check if the syspend used S0ix */
if (pm_suspend_via_firmware())
return 0;
if (!pmc_core_is_s0ix_failed(pmcdev))
return 0;
if (!warn_on_s0ix_failures)
return 0;
if (pmc_core_is_pc10_failed(pmcdev)) {
/* S0ix failed because of PC10 entry failure */
dev_info(dev, "CPU did not enter PC10!!! (PC10 cnt=0x%llx)\n",

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

@ -319,7 +319,6 @@ struct pmc_reg_map {
* @pmc_xram_read_bit: flag to indicate whether PMC XRAM shadow registers
* used to read MPHY PG and PLL status are available
* @mutex_lock: mutex to complete one transcation
* @check_counters: On resume, check if counters are getting incremented
* @pc10_counter: PC10 residency counter
* @s0ix_counter: S0ix residency (step adjusted)
* @num_lpm_modes: Count of enabled modes
@ -338,7 +337,6 @@ struct pmc_dev {
int pmc_xram_read_bit;
struct mutex lock; /* generic mutex lock for PMC Core */
bool check_counters; /* Check for counter increments on resume */
u64 pc10_counter;
u64 s0ix_counter;
int num_lpm_modes;