azalea: fixed PS2 yellow band

add function can delay EC release irq and clear IBF
it will let host not send data too fast, make EC
have time to process 8042 data and also not lose data
after delay finish read HIKMDI clear IBF data and release 8042 irq

verify: run STPM warmboot tools 0/500.
(warmboot will let PS2 driver init)

Signed-off-by: LeoCX_Tsai <LeoCX_Tsai@compal.com>

Author: LeoCX-Tsai

zephyr/program/lotus/azalea/project.conf

@@ -24,3 +24,6 @@ CONFIG_PLATFORM_EC_PWM_KBLIGHT=y
 CONFIG_PLATFORM_EC_KEYBOARD_VIVALDI=n
 CONFIG_PLATFORM_EC_KEYBOARD_CUSTOMIZATION=y
 CONFIG_PLATFORM_KEYBOARD_SCANCODE_CALLBACK=y
+
+# Thrid party change
+CONFIG_THIRD_PARTY_CUSTOMIZED_DESIGN=y

zephyr/shim/src/espi.c

@@ -644,6 +644,67 @@ void lpc_aux_put_char(uint8_t chr, int send_irq)
 	LOG_INF("AUX put %02x", kb_char);
 }
 
+#ifdef CONFIG_THIRD_PARTY_CUSTOMIZED_DESIGN
+
+/*
+ * this can delay EC release irq and clear IBF
+ * it will let host not send data too fast, make EC
+ * have time to process 8042 data and also not lose data
+ * after delay finish read HIKMDI clear IBF data and release 8042 irq
+ */
+static void lpc_kbc_process(void)
+{
+	int rv;
+	uint32_t status;
+
+	rv = espi_read_lpc_request(espi_dev, E8042_CLEAR_IBF, &status);
+	if (rv) {
+		LOG_ERR("ESPI read failed: E8042_CLEAR_IBF = %d", rv);
+		return;
+	}
+
+	rv = espi_write_lpc_request(espi_dev, E8042_RESUME_IRQ, 0);
+	if (rv) {
+		LOG_ERR("ESPI write failed: E8042_RESUME_IRQ = %d", rv);
+	}
+}
+DECLARE_DEFERRED(lpc_kbc_process);
+
+static void kbc_ibf_obe_handler(uint32_t data)
+{
+#ifdef HAS_TASK_KEYPROTO
+	uint8_t is_ibf = is_8042_ibf(data);
+	uint32_t status = I8042_AUX_DATA;
+	int rv;
+
+	if (is_ibf == HOST_KBC_EVT_IBF) {
+
+		/* put data to queue and trigger 8042 task*/
+		keyboard_host_write(get_8042_data(data), get_8042_type(data));
+
+		/* Pause 8042 irq let KB task process data */
+		rv = espi_write_lpc_request(espi_dev, E8042_PAUSE_IRQ, 0);
+		if (rv) {
+			LOG_ERR("ESPI write failed: E8042_PAUSE_IRQ = %d", rv);
+		}
+
+		hook_call_deferred(&lpc_kbc_process_data, 200);
+
+	} else if (IS_ENABLED(CONFIG_8042_AUX)) {
+		rv = espi_write_lpc_request(espi_dev, E8042_CLEAR_FLAG,
+					    &status);
+		if (rv) {
+			LOG_ERR("ESPI write failed: E8042_CLEAR_FLAG = %d", rv);
+		}
+	}
+
+	/* OBE data coming */
+	if (is_ibf != HOST_KBC_EVT_IBF)
+		task_wake(TASK_ID_KEYPROTO);
+
+#endif
+}
+#else
 static void kbc_ibf_obe_handler(uint32_t data)
 {
 #ifdef HAS_TASK_KEYPROTO
@@ -663,6 +724,7 @@ static void kbc_ibf_obe_handler(uint32_t data)
 	task_wake(TASK_ID_KEYPROTO);
 #endif
 }
+#endif
 
 int lpc_keyboard_input_pending(void)
 {