diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/platform/x86/intel_telemetry_debugfs.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/platform/x86/intel_telemetry_debugfs.c b/drivers/platform/x86/intel_telemetry_debugfs.c index 4249e8267bbc..5bc4f208cc8b 100644 --- a/drivers/platform/x86/intel_telemetry_debugfs.c +++ b/drivers/platform/x86/intel_telemetry_debugfs.c @@ -890,6 +890,31 @@ static int pm_suspend_exit_cb(void) goto out; } + /* + * Due to some design limitations in the firmware, sometimes the + * counters do not get updated by the time we reach here. As a + * workaround, we try to see if this was a genuine case of sleep + * failure or not by cross-checking from PMC GCR registers directly. + */ + if (suspend_shlw_ctr_exit == suspend_shlw_ctr_temp && + suspend_deep_ctr_exit == suspend_deep_ctr_temp) { + ret = intel_pmc_gcr_read64(PMC_GCR_TELEM_SHLW_S0IX_REG, + &suspend_shlw_res_exit); + if (ret < 0) + goto out; + + ret = intel_pmc_gcr_read64(PMC_GCR_TELEM_DEEP_S0IX_REG, + &suspend_deep_res_exit); + if (ret < 0) + goto out; + + if (suspend_shlw_res_exit > suspend_shlw_res_temp) + suspend_shlw_ctr_exit++; + + if (suspend_deep_res_exit > suspend_deep_res_temp) + suspend_deep_ctr_exit++; + } + suspend_shlw_ctr_exit -= suspend_shlw_ctr_temp; suspend_deep_ctr_exit -= suspend_deep_ctr_temp; suspend_shlw_res_exit -= suspend_shlw_res_temp; |