At present, the PMF driver employs custom system state codes to update
system states. It is recommended to replace these with existing input
event codes (KEY_SLEEP, KEY_SUSPEND, and KEY_SCREENLOCK) to align system
updates with the PMF-TA output actions.
Co-developed-by: Patil Rajesh Reddy <Patil.Reddy@xxxxxxx>
Signed-off-by: Patil Rajesh Reddy <Patil.Reddy@xxxxxxx>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@xxxxxxx>
---
drivers/platform/x86/amd/pmf/pmf.h | 2 +
drivers/platform/x86/amd/pmf/tee-if.c | 62 +++++++++++++++++++++------
2 files changed, 52 insertions(+), 12 deletions(-)
diff --git a/drivers/platform/x86/amd/pmf/pmf.h b/drivers/platform/x86/amd/pmf/pmf.h
index eeedd0c0395a..753d5662c080 100644
--- a/drivers/platform/x86/amd/pmf/pmf.h
+++ b/drivers/platform/x86/amd/pmf/pmf.h
@@ -12,6 +12,7 @@
#define PMF_H
#include <linux/acpi.h>
+#include <linux/input.h>
#include <linux/platform_profile.h>
#define POLICY_BUF_MAX_SZ 0x4b000
@@ -300,6 +301,7 @@ struct amd_pmf_dev {
void __iomem *policy_base;
bool smart_pc_enabled;
u16 pmf_if_version;
+ struct input_dev *pmf_idev;
};
struct apmf_sps_prop_granular_v2 {
diff --git a/drivers/platform/x86/amd/pmf/tee-if.c b/drivers/platform/x86/amd/pmf/tee-if.c
index b438de4d6bfc..b0449f912048 100644
--- a/drivers/platform/x86/amd/pmf/tee-if.c
+++ b/drivers/platform/x86/amd/pmf/tee-if.c
@@ -62,18 +62,12 @@ static void amd_pmf_prepare_args(struct amd_pmf_dev *dev, int cmd,
param[0].u.memref.shm_offs = 0;
}
-static int amd_pmf_update_uevents(struct amd_pmf_dev *dev, u16 event)
+static void amd_pmf_update_uevents(struct amd_pmf_dev *dev, u16 event)
{
- char *envp[2] = {};
-
- envp[0] = kasprintf(GFP_KERNEL, "EVENT_ID=%d", event);
- if (!envp[0])
- return -EINVAL;
-
- kobject_uevent_env(&dev->dev->kobj, KOBJ_CHANGE, envp);
-
- kfree(envp[0]);
- return 0;
+ input_report_key(dev->pmf_idev, event, 1); /* key press */
+ input_sync(dev->pmf_idev);
+ input_report_key(dev->pmf_idev, event, 0); /* key release */
+ input_sync(dev->pmf_idev);
}
static void amd_pmf_apply_policies(struct amd_pmf_dev *dev, struct ta_pmf_enact_result *out)
@@ -149,7 +143,20 @@ static void amd_pmf_apply_policies(struct amd_pmf_dev *dev, struct ta_pmf_enact_
break;
case PMF_POLICY_SYSTEM_STATE:
- amd_pmf_update_uevents(dev, val);
+ switch (val) {
+ case 0:
+ amd_pmf_update_uevents(dev, KEY_SLEEP);
+ break;
+ case 1:
+ amd_pmf_update_uevents(dev, KEY_SUSPEND);
+ break;
+ case 2:
+ amd_pmf_update_uevents(dev, KEY_SCREENLOCK);
+ break;
+ default:
+ dev_err(dev->dev, "Invalid PMF policy system state: %d\n", val);
+ }
+
dev_dbg(dev->dev, "update SYSTEM_STATE: %s\n",
amd_pmf_uevent_as_str(val));
break;
@@ -368,6 +375,30 @@ static int amd_pmf_ta_open_session(struct tee_context *ctx, u32 *id)
return rc;
}
+static int amd_pmf_register_input_device(struct amd_pmf_dev *dev)
+{
+ int err;
+
+ dev->pmf_idev = devm_input_allocate_device(dev->dev);
+ if (!dev->pmf_idev)
+ return -ENOMEM;
+
+ dev->pmf_idev->name = "PMF-TA output events";
+ dev->pmf_idev->phys = "amd-pmf/input0";
+
+ input_set_capability(dev->pmf_idev, EV_KEY, KEY_SLEEP);
+ input_set_capability(dev->pmf_idev, EV_KEY, KEY_SCREENLOCK);
+ input_set_capability(dev->pmf_idev, EV_KEY, KEY_SUSPEND);
+
+ err = input_register_device(dev->pmf_idev);
+ if (err) {
+ dev_err(dev->dev, "Failed to register input device: %d\n", err);
+ return err;
+ }
+
+ return 0;
+}
+
static int amd_pmf_tee_init(struct amd_pmf_dev *dev)
{
u32 size;
@@ -475,6 +506,10 @@ int amd_pmf_init_smart_pc(struct amd_pmf_dev *dev)
if (pb_side_load)
amd_pmf_open_pb(dev, dev->dbgfs_dir);
+ ret = amd_pmf_register_input_device(dev);
+ if (ret)
+ goto error;
+
return 0;
error:
@@ -488,6 +523,9 @@ void amd_pmf_deinit_smart_pc(struct amd_pmf_dev *dev)
if (pb_side_load && dev->esbin)
amd_pmf_remove_pb(dev);
+ if (dev->pmf_idev)
+ input_unregister_device(dev->pmf_idev);
+
cancel_delayed_work_sync(&dev->pb_work);
kfree(dev->prev_data);
dev->prev_data = NULL;
--
2.25.1
