HID: amd_sfh: Enable operating mode

Add changes to enable operating modes in the driver to allow the FW to
activate and retrieve data from relevant sensors. This enables the FW to
take necessary actions based on the operating modes.

Tested-by: Eric Naim <[e-mail]>
Co-developed-by: Akshata MukundShetty <[e-mail]>
Signed-off-by: Akshata MukundShetty <[e-mail]>
Signed-off-by: Basavaraj Natikar <[e-mail]>
Reviewed-by: Mario Limonciello <[e-mail]>
Signed-off-by: Jiri Kosina <[e-mail]>

drivers/hid/amd-sfh-hid/amd_sfh_client.c

···
 		return "gyroscope";
 	case mag_idx:
 		return "magnetometer";
+	case op_idx:
+		return "operating-mode";
 	case als_idx:
 	case ACS_IDX: /* ambient color sensor */
 		return "ALS";
···
 			rc = -ENOMEM;
 			goto cleanup;
 		}
+
+		if (cl_data->sensor_idx[i] == op_idx) {
+			info.period = AMD_SFH_IDLE_LOOP;
+			info.sensor_idx = cl_data->sensor_idx[i];
+			info.dma_address = cl_data->sensor_dma_addr[i];
+			mp2_ops->start(privdata, info);
+			cl_data->sensor_sts[i] = amd_sfh_wait_for_response(privdata,
+									   cl_data->sensor_idx[i],
+									   SENSOR_ENABLED);
+			if (cl_data->sensor_sts[i] == SENSOR_ENABLED)
+				cl_data->is_any_sensor_enabled = true;
+			continue;
+		}
+
 		cl_data->sensor_sts[i] = SENSOR_DISABLED;
 		cl_data->sensor_requested_cnt[i] = 0;
 		cl_data->cur_hid_dev = i;
···
 
 	for (i = 0; i < cl_data->num_hid_devices; i++) {
 		cl_data->cur_hid_dev = i;
+		if (cl_data->sensor_idx[i] == op_idx) {
+			dev_dbg(dev, "sid 0x%x (%s) status 0x%x\n",
+				cl_data->sensor_idx[i], get_sensor_name(cl_data->sensor_idx[i]),
+				cl_data->sensor_sts[i]);
+			continue;
+		}
+
 		if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
 			rc = amdtp_hid_probe(i, cl_data);
 			if (rc)

drivers/hid/amd-sfh-hid/amd_sfh_hid.h

···
 #ifndef AMDSFH_HID_H
 #define AMDSFH_HID_H
 
-#define MAX_HID_DEVICES		6
+#define MAX_HID_DEVICES		7
 #define AMD_SFH_HID_VENDOR	0x1022
 #define AMD_SFH_HID_PRODUCT	0x0001
 

drivers/hid/amd-sfh-hid/amd_sfh_pcie.c

···
 #define ACEL_EN		BIT(0)
 #define GYRO_EN		BIT(1)
 #define MAGNO_EN	BIT(2)
+#define OP_EN		BIT(15)
 #define HPD_EN		BIT(16)
 #define ALS_EN		BIT(19)
 #define ACS_EN		BIT(22)
···
 
 	if (MAGNO_EN & activestatus)
 		sensor_id[num_of_sensors++] = mag_idx;
+
+	if (OP_EN & activestatus)
+		sensor_id[num_of_sensors++] = op_idx;
 
 	if (ALS_EN & activestatus)
 		sensor_id[num_of_sensors++] = als_idx;

drivers/hid/amd-sfh-hid/amd_sfh_pcie.h

···
 	accel_idx = 0,
 	gyro_idx = 1,
 	mag_idx = 2,
+	op_idx = 15,
 	als_idx = 19
 };