[OEM-5.14/OEM-5.17/J][PATCH 1/1] HID: amd_sfh: Add support for sensor discovery

[Aaron Ma]

From: Basavaraj Natikar <Basavaraj.Natikar at amd.com>

BugLink: https://bugs.launchpad.net/bugs/1975798

Sensor discovery status fails in case of broken sensors or
platform not supported. Hence disable driver on failure
of sensor discovery.

Signed-off-by: Mario Limonciello <mario.limonciello at amd.com>
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar at amd.com>
Signed-off-by: Jiri Kosina <jkosina at suse.cz>
(cherry picked from commit b5d7f43e97dabfa04a4be5ff027ce7da119332be)
Signed-off-by: Aaron Ma <aaron.ma at canonical.com>
---
 drivers/hid/amd-sfh-hid/amd_sfh_client.c | 11 +++++++++++
 drivers/hid/amd-sfh-hid/amd_sfh_pcie.c   |  7 +++++++
 drivers/hid/amd-sfh-hid/amd_sfh_pcie.h   |  4 ++++
 3 files changed, 22 insertions(+)

diff --git a/drivers/hid/amd-sfh-hid/amd_sfh_client.c b/drivers/hid/amd-sfh-hid/amd_sfh_client.c
index e8aabdee8e28..2004e4c38ad4 100644
--- a/drivers/hid/amd-sfh-hid/amd_sfh_client.c
+++ b/drivers/hid/amd-sfh-hid/amd_sfh_client.c
@@ -215,6 +215,17 @@ int amd_sfh_hid_client_init(struct amd_mp2_dev *privdata)
 		if (status == SENSOR_ENABLED)
 			cl_data->sensor_sts[i] = SENSOR_ENABLED;
 	}
+	if (privdata->mp2_ops->discovery_status &&
+	    privdata->mp2_ops->discovery_status(privdata) == 0) {
+		amd_sfh_hid_client_deinit(privdata);
+		for (i = 0; i < cl_data->num_hid_devices; i++) {
+			devm_kfree(dev, cl_data->feature_report[i]);
+			devm_kfree(dev, in_data->input_report[i]);
+			devm_kfree(dev, cl_data->report_descr[i]);
+		}
+		dev_warn(dev, "Failed to discover, sensors not enabled\n");
+		return -EOPNOTSUPP;
+	}
 	schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
 	return 0;
 
diff --git a/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c b/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c
index 4bb9db71a5b2..ec257213044d 100644
--- a/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c
+++ b/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c
@@ -129,6 +129,12 @@ static int amd_sfh_irq_init_v2(struct amd_mp2_dev *privdata)
 	return 0;
 }
 
+static int amd_sfh_dis_sts_v2(struct amd_mp2_dev *privdata)
+{
+	return (readl(privdata->mmio + AMD_P2C_MSG(1)) &
+		      SENSOR_DISCOVERY_STATUS_MASK) >> SENSOR_DISCOVERY_STATUS_SHIFT;
+}
+
 void amd_start_sensor(struct amd_mp2_dev *privdata, struct amd_mp2_sensor_info info)
 {
 	union sfh_cmd_param cmd_param;
@@ -244,6 +250,7 @@ static const struct amd_mp2_ops amd_sfh_ops_v2 = {
 	.response = amd_sfh_wait_response_v2,
 	.clear_intr = amd_sfh_clear_intr_v2,
 	.init_intr = amd_sfh_irq_init_v2,
+	.discovery_status = amd_sfh_dis_sts_v2,
 };
 
 static const struct amd_mp2_ops amd_sfh_ops = {
diff --git a/drivers/hid/amd-sfh-hid/amd_sfh_pcie.h b/drivers/hid/amd-sfh-hid/amd_sfh_pcie.h
index 00fc083dc123..2d3203d3daeb 100644
--- a/drivers/hid/amd-sfh-hid/amd_sfh_pcie.h
+++ b/drivers/hid/amd-sfh-hid/amd_sfh_pcie.h
@@ -38,6 +38,9 @@
 
 #define AMD_SFH_IDLE_LOOP	200
 
+#define SENSOR_DISCOVERY_STATUS_MASK		GENMASK(5, 3)
+#define SENSOR_DISCOVERY_STATUS_SHIFT		3
+
 /* SFH Command register */
 union sfh_cmd_base {
 	u32 ul;
@@ -142,5 +145,6 @@ struct amd_mp2_ops {
 	 int (*response)(struct amd_mp2_dev *mp2, u8 sid, u32 sensor_sts);
 	 void (*clear_intr)(struct amd_mp2_dev *privdata);
 	 int (*init_intr)(struct amd_mp2_dev *privdata);
+	 int (*discovery_status)(struct amd_mp2_dev *privdata);
 };
 #endif
-- 
2.34.1