di: pretect reg unreg flow [1/1]

PD#SWPL-4918

Problem:
when reg unreg event called too fast, di cause system crash

Solution:
pretect reg and unreg flow

Verify:
tl1

Change-Id: I9b3e28c2b0b709d4f53f60b1f044a390933117ce
Signed-off-by: Yong Qin <yong.qin@amlogic.com>

drivers/amlogic/media/deinterlace/deinterlace.c

@@ -129,7 +129,7 @@ static di_dev_t *de_devp;
 static dev_t di_devno;
 static struct class *di_clsp;
 
-static const char version_s[] = "2019-03-14a";
+static const char version_s[] = "2019-03-14b";
 
 static int bypass_state = 1;
 static int bypass_all;
@@ -266,6 +266,8 @@ static long same_field_bot_count;
 static int post_hold_line = 8; /*2019-01-10: from VLSI feijun from 17 to 8*/
 static int post_urgent = 1;
 
+static struct mutex di_event_mutex;
+
 /*pre process speed debug */
 static int pre_process_time;
 static int di_receiver_event_fun(int type, void *data, void *arg);
@@ -3460,8 +3462,14 @@ static unsigned char pre_de_buf_config(void)
 	bool bit10_pack_patch = false;
 	unsigned int width_roundup = 2;
 
-	if (di_blocking || !atomic_read(&de_devp->mem_flag))
+	if (di_blocking || !atomic_read(&de_devp->mem_flag)
+		|| di_pre_stru.unreg_req_flag) {
+		if (di_pre_stru.unreg_req_flag)
+			pr_info("DI: %s fail unreg_req_flag=%d\n", __func__,
+			di_pre_stru.unreg_req_flag);
 		return 0;
+	}
+
 	if ((list_count(QUEUE_IN_FREE) < 2 && (!di_pre_stru.di_inp_buf_next)) ||
 	    (queue_empty(QUEUE_LOCAL_FREE)))
 		return 0;
@@ -5984,6 +5992,8 @@ static void di_unreg_process_irq(void)
 	ulong flags = 0;
 	spin_lock_irqsave(&plist_lock, flags);
 #endif
+
+	pr_info("DI: %s S\n", __func__);
 	init_flag = 0;
 	mirror_disable = get_blackout_policy();
 	di_lock_irqfiq_save(irq_flag2);
@@ -6048,6 +6058,7 @@ static void di_unreg_process_irq(void)
 		up(&di_sema);
 	}
 #endif
+	pr_info("DI: %s E\n", __func__);
 }
 
 static void di_reg_process(void)
@@ -6223,7 +6234,6 @@ static void di_reg_process_irq(void)
 	if (pre_run_flag == DI_RUN_FLAG_STEP)
 		pre_run_flag = DI_RUN_FLAG_STEP_DONE;
 
-
 	vframe = vf_peek(VFM_NAME);
 
 	if (vframe) {
@@ -6596,7 +6606,10 @@ static void di_pre_process_irq(struct di_pre_stru_s *pre_stru_p)
 	}
 
 	for (i = 0; i < 2; i++) {
-		if (active_flag)
+		if (active_flag && (!pre_stru_p->unreg_req_flag_irq
+			&& !pre_stru_p->unreg_req_flag
+			&& !pre_stru_p->reg_req_flag_irq
+			&& !pre_stru_p->reg_req_flag))
 			di_process();
 	}
 	log_buffer_state("pro");
@@ -6629,19 +6642,45 @@ static int di_receiver_event_fun(int type, void *data, void *arg)
 {
 	int i;
 	ulong flags;
+	char *provider_name = (char *)data;
+	u32 sts = 0;
 
 	if (type == VFRAME_EVENT_PROVIDER_QUREY_VDIN2NR) {
+		sts = di_pre_stru.vdin2nr;
 		return di_pre_stru.vdin2nr;
 	} else if (type == VFRAME_EVENT_PROVIDER_UNREG) {
+		mutex_lock(&di_event_mutex);
+
 		pr_dbg("%s , is_bypass() %d trick_mode %d bypass_all %d\n",
 			__func__, is_bypass(NULL), trick_mode, bypass_all);
-		pr_info("%s: vf_notify_receiver unreg\n", __func__);
+		pr_info("DI: %s: unreg\n", __func__);
+		pr_info("DI: provider name:%s\n", provider_name);
 
-		di_pre_stru.unreg_req_flag = 1;
+		if (di_pre_stru.reg_req_flag ||
+			di_pre_stru.reg_req_flag_irq)
+			pr_info("DI: warning reg_req_flag is %d,%d\n",
+				di_pre_stru.reg_req_flag,
+				di_pre_stru.reg_req_flag_irq);
 		di_pre_stru.vdin_source = false;
+
+		/*check reg process, and waiting reg*/
+		di_pre_stru.unreg_req_flag_cnt = 0;
+		while (di_pre_stru.reg_req_flag ||
+			di_pre_stru.reg_req_flag_irq) {
+			msleep(20);
+			if (di_pre_stru.unreg_req_flag_cnt++ >
+				di_reg_unreg_cnt) {
+				pr_err("DI : reg to unreg timeout!!!\n");
+				di_reg_process();
+				break;
+			}
+		}
+		di_pre_stru.unreg_req_flag = 1;
 		trigger_pre_di_process(TRIGGER_PRE_BY_PROVERDER_UNREG);
+		/*check unreg process*/
 		di_pre_stru.unreg_req_flag_cnt = 0;
 		while (di_pre_stru.unreg_req_flag) {
+			/*waitting di_unreg_process_irq finish*/
 			usleep_range(10000, 10001);
 			if (di_pre_stru.unreg_req_flag_cnt++ >
 				di_reg_unreg_cnt) {
@@ -6669,10 +6708,12 @@ static int di_receiver_event_fun(int type, void *data, void *arg)
 		if (di_pre_stru.vdin_source)
 			DI_Wr_reg_bits(VDIN_WR_CTRL, 0x3, 24, 3);
 #endif
+		mutex_unlock(&di_event_mutex);
+		pr_info("DI:ureg f\n");
 	} else if (type == VFRAME_EVENT_PROVIDER_RESET) {
 		di_blocking = 1;
 
-		pr_dbg("%s: VFRAME_EVENT_PROVIDER_RESET\n", __func__);
+		pr_info("%s: VFRAME_EVENT_PROVIDER_RESET\n", __func__);
 		if (is_bypass(NULL)
 			|| bypass_state
 			|| di_pre_stru.bypass_flag) {
@@ -6685,7 +6726,7 @@ static int di_receiver_event_fun(int type, void *data, void *arg)
 	} else if (type == VFRAME_EVENT_PROVIDER_LIGHT_UNREG) {
 		di_blocking = 1;
 
-		pr_dbg("%s: vf_notify_receiver ligth unreg\n", __func__);
+		pr_info("%s: vf_notify_receiver ligth unreg\n", __func__);
 
 light_unreg:
 		spin_lock_irqsave(&plist_lock, flags);
@@ -6701,7 +6742,7 @@ light_unreg:
 	} else if (type == VFRAME_EVENT_PROVIDER_LIGHT_UNREG_RETURN_VFRAME) {
 		unsigned char vf_put_flag = 0;
 
-		pr_dbg(
+		pr_info(
 			"%s:VFRAME_EVENT_PROVIDER_LIGHT_UNREG_RETURN_VFRAME\n",
 			__func__);
 /*
@@ -6829,29 +6870,52 @@ light_unreg:
 		}
 #endif
 	} else if (type == VFRAME_EVENT_PROVIDER_REG) {
-		char *provider_name = (char *)data;
+		/*char *provider_name = (char *)data;*/
 		char *receiver_name = NULL;
+		mutex_lock(&di_event_mutex);
+
 		if (de_devp->flags & DI_SUSPEND_FLAG) {
 			pr_err("[DI] reg event device hasn't resumed\n");
+			mutex_unlock(&di_event_mutex);
 			return -1;
 		}
 		if (reg_flag) {
 			pr_err("[DI] no muti instance.\n");
+			mutex_unlock(&di_event_mutex);
 			return -1;
 		}
-		pr_info("%s: vframe provider reg %s\n", __func__,
+		pr_info("DI: %s: reg\n", __func__);
-			provider_name);
+		pr_info("DI: provider name:%s\n", provider_name);
 
 		bypass_state = 0;
-		di_pre_stru.reg_req_flag = 1;
+		if (di_pre_stru.unreg_req_flag ||
+			di_pre_stru.unreg_req_flag_irq)
+			pr_info("DI: warning unreg_req_flag is %d,%d\n",
+				di_pre_stru.unreg_req_flag,
+				di_pre_stru.unreg_req_flag_irq);
 
 		trigger_pre_di_process(TRIGGER_PRE_BY_PROVERDER_REG);
+		/*check unreg process*/
+		di_pre_stru.reg_req_flag_cnt = 0;
+		while (di_pre_stru.unreg_req_flag ||
+			di_pre_stru.unreg_req_flag_irq) {
+			msleep(20);
+			if (di_pre_stru.reg_req_flag_cnt++ > di_reg_unreg_cnt) {
+				pr_err("%s:unreg to reg timeout!!!\n",
+					__func__);
+				di_unreg_process();
+				break;
+			}
+		}
+
+		di_pre_stru.reg_req_flag = 1;
+		/*check reg process*/
 		di_pre_stru.reg_req_flag_cnt = 0;
 		while (di_pre_stru.reg_req_flag) {
 			usleep_range(10000, 10001);
 			if (di_pre_stru.reg_req_flag_cnt++ > di_reg_unreg_cnt) {
 				reg_unreg_timeout_cnt++;
-				pr_dbg("%s:reg_req_flag timeout!!!\n",
+				pr_err("%s:reg_req_flag timeout!!!\n",
 					__func__);
 				break;
 			}
@@ -6876,6 +6940,8 @@ light_unreg:
 		} else {
 			pr_info("%s error receiver is null.\n", __func__);
 		}
+		mutex_unlock(&di_event_mutex);
+		pr_info("DI:reg f\n");
 	}
 #ifdef DET3D
 	else if (type == VFRAME_EVENT_PROVIDER_SET_3D_VFRAME_INTERLEAVE) {
@@ -6892,9 +6958,9 @@ light_unreg:
 			VFRAME_EVENT_PROVIDER_FR_END_HINT, data);
 	}
 
-	return 0;
+	return sts;
 }
-
+#if 0
 static void fast_process(void)
 {
 	int i;
@@ -6951,6 +7017,7 @@ static void fast_process(void)
 		}
 	}
 }
+#endif
 
 static vframe_t *di_vf_peek(void *arg)
 {
@@ -6969,7 +7036,7 @@ static vframe_t *di_vf_peek(void *arg)
 
 	log_buffer_state("pek");
 
-	fast_process();
+	/*fast_process(); qy temp */
 #ifdef SUPPORT_START_FRAME_HOLD
 	if ((disp_frame_count == 0) && (is_bypass(NULL) == 0)) {
 		int ready_count = list_count(QUEUE_POST_READY);
@@ -7749,6 +7816,7 @@ static int di_probe(struct platform_device *pdev)
 	device_create_file(di_devp->dev, &dev_attr_tvp_region);
 	pd_device_files_add(di_devp->dev);
 	nr_drv_init(di_devp->dev);
+	mutex_init(&di_event_mutex);
 
 	init_flag = 0;
 	reg_flag = 0;