From cac6221ab1b3086590870adce99d3a5822153bb9 Mon Sep 17 00:00:00 2001
From: wangyq13 <wangyq13@lenovo.com>
Date: Tue, 30 Nov 2021 21:38:15 +0800
Subject: [PATCH] focaltech_v2_mmi: check if panel is available

focaltech_v2_mmi:
Check if panel is available, if not, don't probe, save boot time
and don't disturb other touch driver operation.

Change-Id: Ib4db6f77fc458970dcc42fd7460ee3a800e3ff47
Signed-off-by: wangyq13 <wangyq13@lenovo.com>
Reviewed-on: https://gerrit.mot.com/2131110
SLTApproved: Slta Waiver
SME-Granted: SME Approvals Granted
Tested-by: Jira Key
Reviewed-by: Wei Deng <dengwei1@motorola.com>
Reviewed-by: Jun Weng <wengjun1@motorola.com>
Reviewed-by: Huosheng Liao <liaohs@motorola.com>
Submit-Approved: Jira Key
---
 drivers/input/touchscreen/focaltech_v2_mmi/Android.mk      | 2 +-
 drivers/input/touchscreen/focaltech_v2_mmi/Kbuild          | 1 +
 .../input/touchscreen/focaltech_v2_mmi/focaltech_core.c    | 7 +++++++
 3 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/input/touchscreen/focaltech_v2_mmi/Android.mk b/drivers/input/touchscreen/focaltech_v2_mmi/Android.mk
index 3e0996efa910..ce800fd48b26 100644
--- a/drivers/input/touchscreen/focaltech_v2_mmi/Android.mk
+++ b/drivers/input/touchscreen/focaltech_v2_mmi/Android.mk
@@ -31,7 +31,7 @@ include $(CLEAR_VARS)
 LOCAL_MODULE := focaltech_v2_mmi.ko
 LOCAL_MODULE_TAGS := optional
 LOCAL_MODULE_PATH := $(KERNEL_MODULES_OUT)
-
+LOCAL_ADDITIONAL_DEPENDENCIES += $(KERNEL_MODULES_OUT)/mmi_info.ko
 ifneq ($(findstring touchscreen_mmi.ko,$(BOARD_VENDOR_KERNEL_MODULES)),)
 	LOCAL_ADDITIONAL_DEPENDENCIES += $(KERNEL_MODULES_OUT)/touchscreen_mmi.ko
 endif
diff --git a/drivers/input/touchscreen/focaltech_v2_mmi/Kbuild b/drivers/input/touchscreen/focaltech_v2_mmi/Kbuild
index 68bb6f5db9c2..187de9410c2b 100644
--- a/drivers/input/touchscreen/focaltech_v2_mmi/Kbuild
+++ b/drivers/input/touchscreen/focaltech_v2_mmi/Kbuild
@@ -41,3 +41,4 @@ ifneq ($(filter m y, $(CONFIG_DRM_PANEL_NOTIFICATIONS)),)
 	EXTRA_CFLAGS += -DCONFIG_DRM_PANEL_NOTIFICATIONS
 endif
 KBUILD_EXTRA_SYMBOLS += $(CURDIR)/../../kernel/msm-$(MODULE_KERNEL_VERSION)/Module.symvers
+KBUILD_EXTRA_SYMBOLS += $(CURDIR)/$(KBUILD_EXTMOD)/../../../mmi_info/$(GKI_OBJ_MODULE_DIR)/Module.symvers
diff --git a/drivers/input/touchscreen/focaltech_v2_mmi/focaltech_core.c b/drivers/input/touchscreen/focaltech_v2_mmi/focaltech_core.c
index 29d1870aab86..b06a734f4184 100644
--- a/drivers/input/touchscreen/focaltech_v2_mmi/focaltech_core.c
+++ b/drivers/input/touchscreen/focaltech_v2_mmi/focaltech_core.c
@@ -51,6 +51,7 @@
 #define FTS_SUSPEND_LEVEL 1     /* Early-suspend level */
 #endif
 #include "focaltech_core.h"
+#include <linux/mmi_device.h>
 
 #ifdef CONFIG_INPUT_TOUCHSCREEN_MMI
 extern int fts_mmi_dev_register(struct fts_ts_data *ts_data);
@@ -1708,6 +1709,12 @@ static int fts_ts_probe_entry(struct fts_ts_data *ts_data)
 
     FTS_FUNC_ENTER();
     FTS_INFO("%s", FTS_DRIVER_VERSION);
+
+    if (ts_data->client->dev.of_node && !mmi_device_is_available(ts_data->client->dev.of_node)) {
+        FTS_ERROR("mmi: device not supported\n");
+        return -ENODEV;
+    }
+
     ts_data->pdata = kzalloc(pdata_size, GFP_KERNEL);
     if (!ts_data->pdata) {
         FTS_ERROR("allocate memory for platform_data fail");