WORKAROUND: delay 3 seconds to disable BB retimer power

When the system resumes from S0ix, it will do the HDMI handshake.
But if EC disable the BB retimer power at this moment, it will cause
the handshake is failed.

EC can not know when the system actually resume from S0ix, so add the
workaround to delay 3 seconds to disable BB retimer power, and cancel
the delay function when EC want to enable the retimer power.

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

Author: Josh Tsai

board/hx30/board.c

@@ -763,6 +763,16 @@ DECLARE_HOOK(HOOK_CHIPSET_SHUTDOWN,
 		HOOK_PRIO_DEFAULT);
 
 static int force_gpio6_rework;
+
+void disable_bb_retimer_power_deferred(void)
+{
+	if (board_get_version() > BOARD_VERSION_10 || force_gpio6_rework) {
+		CPRINTS("Disable BBR power");
+		gpio_set_level(GPIO_PM_SLP_S0_L, 0);
+	}
+}
+DECLARE_DEFERRED(disable_bb_retimer_power_deferred);
+
 /* Called on AP S3 -> S0 transition */
 static void board_chipset_resume(void)
 {
@@ -773,12 +783,17 @@ static void board_chipset_resume(void)
 	charge_psys_onoff(1);
 
 	/* Enable BB retimer power, for MP boards. */
-	if (board_get_version() > BOARD_VERSION_10 || force_gpio6_rework)
+	if (board_get_version() > BOARD_VERSION_10 || force_gpio6_rework) {
+		CPRINTS("Enable BBR power");
 		gpio_set_level(GPIO_PM_SLP_S0_L, 1);
+	}
+
+	hook_call_deferred(&disable_bb_retimer_power_deferred_data, -1);
 }
 DECLARE_HOOK(HOOK_CHIPSET_RESUME, board_chipset_resume,
 	     MOTION_SENSE_HOOK_PRIO-1);
 
+
 /* Called on AP S0 -> S3 transition */
 static void board_chipset_suspend(void)
 {
@@ -791,8 +806,7 @@ static void board_chipset_suspend(void)
 	charge_psys_onoff(0);
 
 	/* Disable BB retimer power, for MP boards. */
-	if (board_get_version() > BOARD_VERSION_10 || force_gpio6_rework)
-		gpio_set_level(GPIO_PM_SLP_S0_L, 0);
+	hook_call_deferred(&disable_bb_retimer_power_deferred_data, 3 * SECOND);
 }
 DECLARE_HOOK(HOOK_CHIPSET_SUSPEND,
 		board_chipset_suspend,