Merge pull request #1015 from dmazzella/patch-1

Arduino_H7_Video: handling errors at initialization time

Author: leonardocavagnis

libraries/Arduino_H7_Video/src/Arduino_H7_Video.cpp

@@ -95,7 +95,10 @@ int Arduino_H7_Video::begin() {
 #endif
 
   /* Video controller/bridge init */
-  _shield->init(_edidMode);
+  int err_code = _shield->init(_edidMode);
+  if (err_code < 0) {
+    return 3; /* Video controller fail init */
+  }
 
   #if __has_include("lvgl.h")
     /* Initiliaze LVGL library */

libraries/Arduino_H7_Video/src/H7DisplayShield.cpp

@@ -31,13 +31,22 @@ int USBCVideoClass::init(int edidmode) {
     }
 
     //Checking HDMI plug event
-    anx7625_wait_hpd_event(0);
+    err_code = anx7625_wait_hpd_event(0);
+    if(err_code < 0) {
+        return err_code;
+    }
 
     //Read EDID
-    anx7625_dp_get_edid(0, &recognized_edid);
+    err_code = anx7625_dp_get_edid(0, &recognized_edid);
+    if(err_code < 0) {
+        return err_code;
+    }
 
     //DSI Configuration
-    anx7625_dp_start(0, &recognized_edid, (enum edid_modes) edidmode);
+    err_code = anx7625_dp_start(0, &recognized_edid, (enum edid_modes) edidmode);
+    if(err_code < 0) {
+        return err_code;
+    }
 
     return 0;
 }

libraries/Arduino_H7_Video/src/anx7625.cpp

@@ -520,15 +520,21 @@ int anx7625_init(uint8_t bus) {
 	return 0;
 }
 
-void anx7625_wait_hpd_event(uint8_t bus) {
+int anx7625_wait_hpd_event(uint8_t bus) {
 	ANXINFO("Waiting for HDMI hot plug event...\n");
-	
-	while (1) {
+
+	int retry_hpd_change = 10000;
+	while (--retry_hpd_change) {
 		mdelay(10);
 		int detected = anx7625_hpd_change_detect(bus);
-		if (detected == 1)
-			break;
+		if (detected < 0)
+			return -1;
+		if (detected > 0)
+			return 0;
 	}
+
+	ANXERROR("Timed out to detect HPD change on bus %d.\n", bus);
+	return -1;
 }
 
 int anx7625_get_cc_status(uint8_t bus, uint8_t *cc_status) {

libraries/Arduino_H7_Video/src/anx7625.h

@@ -20,7 +20,7 @@ extern "C" {
 int 	anx7625_dp_start(uint8_t bus, const struct edid *edid, enum edid_modes mode = EDID_MODE_AUTO);
 int 	anx7625_dp_get_edid(uint8_t bus, struct edid *out);
 int 	anx7625_init(uint8_t bus);
-void 	anx7625_wait_hpd_event(uint8_t bus);
+int 	anx7625_wait_hpd_event(uint8_t bus);
 int 	anx7625_get_cc_status(uint8_t bus, uint8_t *cc_status);
 int 	anx7625_read_system_status(uint8_t bus, uint8_t *sys_status);
 bool 	anx7625_is_power_provider(uint8_t bus);