fwk: main: fix keyboard backlight auto will flash when bootup

when shutdown will write auto_value(99) to bbram
so if bootup run board_kblight_init will set 99 to kbbl

BRANCH=fwk-main
BUG=when bootup kbbl will flash once then off
TEST=on lilac, change to auto kbbl(fn+space), than shutdown unit and bootup
check when bootup kbbl still keep off.
TEST=on lilac, change to auto kbbl(fn+space), cover als sensor then shutdown unit
and bootup, make sure kbbl will not flash and after 2sec light up

Signed-off-by: LeoCX_Tsai <[email protected]>
(cherry picked from commit ab98421f8a339868b6789cce74fab5c7faab6910)

Author: LeoCX-Tsai

zephyr/program/framework/include/led.h

@@ -59,7 +59,8 @@ enum backlight_brightness {
 	KEYBOARD_BL_BRIGHTNESS_MED_LOW = 50,
 	KEYBOARD_BL_BRIGHTNESS_MED = 75,
 	KEYBOARD_BL_BRIGHTNESS_HIGH = 100,
-	KEYBOARD_BL_BRIGHTNESS_AUTO = 99,
+	/* Out of range of valid values. kblight_set will ignore it, but we can detect that auto brightness is enabled */
+	KEYBOARD_BL_BRIGHTNESS_AUTO = 101,
 };
 
 /* EC_LED_COLOR maps to LED_COLOR - 1 */

zephyr/program/framework/src/keyboard_customization_13.c

@@ -154,7 +154,7 @@ void board_kblight_init(void)
 
 	if (system_get_bbram(SYSTEM_BBRAM_IDX_KBSTATE, &current_kblight) == EC_SUCCESS) {
 		kblight_set(current_kblight & 0x7F);
-		if (kblight_get() == KEYBOARD_BL_BRIGHTNESS_AUTO)
+		if (current_kblight == KEYBOARD_BL_BRIGHTNESS_AUTO)
 			kb_als_auto_brightness = true;
 	}
 }

zephyr/program/framework/src/led.c

@@ -178,7 +178,7 @@ static int als_lux_get(void)
 		als_init_deadline.val = now.val;
 		if (als_stable) {
 			als_stable = false;
-			real_illuminance = 0;
+			real_illuminance = 10;
 			/* clear als data and set default level for next time bootup */
 			*(uint16_t *)host_get_memmap(EC_MEMMAP_ALS) = 0;
 			system_set_bbram(SYSTEM_BBRAM_IDX_FP_LED_LEVEL, FP_LED_HIGH);
@@ -228,7 +228,8 @@ void auto_als_led_brightness(void)
 #ifdef CONFIG_PLATFORM_EC_KEYBOARD
 	int kb_brightness;
 
-	if (kbbl_auto_dim_is_enable()) {
+	if (kbbl_auto_dim_is_enable() &&
+		chipset_in_state(CHIPSET_STATE_ON)) {
 		last_kbbl_led_brightness = kblight_get();
 
 		if (als_lux > 5)