A workaround was previously introduced as part of commit 646f429ec2de
("platform/x86: amd-pmc: Set QOS during suspend on CZN w/ timer wakeup")
to prevent CPUs from going into the deepest state during the execution
of the `noirq` stage of `amd_pmc`. As `amd_pmc` has been pushed to the
last step for suspend on AMD platforms, this workaround is no longer
necessary.
Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
---
drivers/platform/x86/amd-pmc.c | 22 ----------------------
1 file changed, 22 deletions(-)
diff --git a/drivers/platform/x86/amd-pmc.c b/drivers/platform/x86/amd-pmc.c
index c13fd93f2662..b636fbe90407 100644
--- a/drivers/platform/x86/amd-pmc.c
+++ b/drivers/platform/x86/amd-pmc.c
@@ -21,7 +21,6 @@
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
-#include <linux/pm_qos.h>
#include <linux/rtc.h>
#include <linux/suspend.h>
#include <linux/seq_file.h>
@@ -96,9 +95,6 @@
#define PMC_MSG_DELAY_MIN_US 50
#define RESPONSE_REGISTER_LOOP_MAX 20000
-/* QoS request for letting CPUs in idle states, but not the deepest */
-#define AMD_PMC_MAX_IDLE_STATE_LATENCY 3
-
#define SOC_SUBSYSTEM_IP_MAX 12
#define DELAY_MIN_US 2000
#define DELAY_MAX_US 3000
@@ -153,7 +149,6 @@ struct amd_pmc_dev {
struct device *dev;
struct pci_dev *rdev;
struct mutex lock; /* generic mutex lock */
- struct pm_qos_request amd_pmc_pm_qos_req;
#if IS_ENABLED(CONFIG_DEBUG_FS)
struct dentry *dbgfs_dir;
#endif /* CONFIG_DEBUG_FS */
@@ -628,14 +623,6 @@ static int amd_pmc_verify_czn_rtc(struct amd_pmc_dev *pdev, u32 *arg)
rc = rtc_alarm_irq_enable(rtc_device, 0);
dev_dbg(pdev->dev, "wakeup timer programmed for %lld seconds\n", duration);
- /*
- * Prevent CPUs from getting into deep idle states while sending OS_HINT
- * which is otherwise generally safe to send when at least one of the CPUs
- * is not in deep idle states.
- */
- cpu_latency_qos_update_request(&pdev->amd_pmc_pm_qos_req, AMD_PMC_MAX_IDLE_STATE_LATENCY);
- wake_up_all_idle_cpus();
-
return rc;
}
@@ -675,9 +662,6 @@ static int amd_pmc_suspend(void *context, bool constraints_met)
return 0;
fail:
- if (pdev->cpu_id == AMD_CPU_ID_CZN)
- cpu_latency_qos_update_request(&pdev->amd_pmc_pm_qos_req,
- PM_QOS_DEFAULT_VALUE);
return rc;
}
@@ -704,11 +688,6 @@ static void amd_pmc_resume(void *context)
if (rc)
dev_err(pdev->dev, "error writing to STB: %d\n", rc);
- /* Restore the QoS request back to defaults if it was set */
- if (pdev->cpu_id == AMD_CPU_ID_CZN)
- cpu_latency_qos_update_request(&pdev->amd_pmc_pm_qos_req,
- PM_QOS_DEFAULT_VALUE);
-
/* Notify on failed entry */
amd_pmc_validate_deepest(pdev);
}
@@ -884,7 +863,6 @@ static int amd_pmc_probe(struct platform_device *pdev)
goto err_pci_dev_put;
amd_pmc_dbgfs_register(dev);
- cpu_latency_qos_add_request(&dev->amd_pmc_pm_qos_req, PM_QOS_DEFAULT_VALUE);
return 0;
err_pci_dev_put:
--
2.34.1
