Used HID power state to control ALS HID report

Sometimes, the host does not send the reset command (0x01) when the system
power on. In this situation, ALS will not report the value.

Change to use HID power state to control ALS HID report event

Signed-off-by: Josh Tsai <josh_tsai@compal.com>

Author: Josh Tsai

board/hx30/i2c_hid_mediakeys.c

@@ -21,9 +21,13 @@
 
 #define HID_SLAVE_CTRL 3
 
-#define REPORT_ID_RADIO				0x01
-#define REPORT_ID_CONSUMER		    0x02
-#define REPORT_ID_SENSOR			0x03
+#define REPORT_ID_RADIO		0x01
+#define REPORT_ID_CONSUMER	0x02
+#define REPORT_ID_SENSOR	0x03
+
+#define ALS_REPORT_STOP		0x00
+#define ALS_REPORT_POLLING	0x01
+#define ALS_REPORT_THRES	0x02
 
 /*
  * See hid usage tables for consumer page
@@ -346,11 +350,39 @@ void i2c_hid_als_init(void)
 	als_sensor.illuminanceValue = 0x0000;
 }
 
+void report_illuminance_value(void)
+{
+	/* bypass the EC_MEMMAP_ALS value to input report */
+	als_sensor.illuminanceValue = *(uint16_t *)host_get_memmap(EC_MEMMAP_ALS);
+
+	/* wait 6s to change mode from polling to threshold */
+
+
+	task_set_event(TASK_ID_HID, ((1 << HID_ALS_REPORT_LUX) |
+		EVENT_REPORT_ILLUMINANCE_VALUE), 0);
+}
+DECLARE_DEFERRED(report_illuminance_value);
+
 static void i2c_hid_send_response(void)
 {
-		task_set_event(TASK_ID_HID,
-			EVENT_HID_HOST_IRQ | EVENT_REPORT_ILLUMINANCE_VALUE, 0);
+		task_set_event(TASK_ID_HID, EVENT_HID_HOST_IRQ, 0);
 }
+
+static void als_report_control(uint8_t report_mode)
+{
+	if (report_mode == 0x01) {
+		/* als report mode = polling */
+		hook_call_deferred(&report_illuminance_value_data,
+			((int) als_feature.report_interval) * MSEC);
+	} else if (report_mode == 0x02) {
+		/* als report mode = threshold */
+		;
+	} else {
+		/* stop report als value */
+		hook_call_deferred(&report_illuminance_value_data, -1);
+	}
+}
+
 static size_t fill_report(uint8_t *buffer, uint8_t report_id, const void *data,
 			  size_t data_len)
 {
@@ -384,7 +416,6 @@ static int i2c_hid_touchpad_command_process(size_t len, uint8_t *buffer)
 	switch (command) {
 	case I2C_HID_CMD_RESET:
 		i2c_hid_mediakeys_init();
-		i2c_hid_als_init();
 
 		/* Wait for the 2-bytes I2C read following the protocol reset. */
 		pending_probe = false;
@@ -442,6 +473,13 @@ static int i2c_hid_touchpad_command_process(size_t len, uint8_t *buffer)
 		 */
 		*buffer = power_state;
 		response_len = 1;
+
+		if (power_state == 0x00) {
+			i2c_hid_als_init();
+			als_report_control(ALS_REPORT_POLLING);
+		} else
+			als_report_control(ALS_REPORT_STOP);
+
 		break;
 	default:
 		return 0;
@@ -557,15 +595,6 @@ void hid_irq_to_host(void)
 	usleep(10);
 }
 
-void report_illuminance_value(void)
-{
-	/* bypass the EC_MEMMAP_ALS value to input report */
-	als_sensor.illuminanceValue = *(uint16_t *)host_get_memmap(EC_MEMMAP_ALS);
-
-   	task_set_event(TASK_ID_HID, ((1 << HID_ALS_REPORT_LUX) | 0x4000), 0);
-}
-DECLARE_DEFERRED(report_illuminance_value);
-
 void hid_handler_task(void *p)
 {
 	uint32_t event;
@@ -589,7 +618,11 @@ void hid_handler_task(void *p)
 		if (event & 0xFFFF) {
 
 			for (i = 0; i < 15; i++) {
-				if (event & (1<<i)) {
+				/**
+				 * filter EVENT_REPORT_ILLUMINANCE_VALUE
+				 * this event only call deferred
+				 */
+				if ((event & 0xBFFF) & (1<<i)) {
 					update_key = i;
 					switch (i) {
 					case HID_KEY_DISPLAY_BRIGHTNESS_UP: