shared-module/displayio/__init__.c: fix keep_primary logic in common_hal_displayio_release_displays_impl()

Author: dhalbert

shared-module/displayio/__init__.c

@@ -146,6 +146,9 @@ static void common_hal_displayio_release_displays_impl(bool keep_primary) {
         displays[i].display_base.type = &mp_type_NoneType;
     }
     for (uint8_t i = 0; i < CIRCUITPY_DISPLAY_LIMIT; i++) {
+        if (i == primary_display_number) {
+            continue;
+        }
         mp_const_obj_t bus_type = display_buses[i].bus_base.type;
         if (bus_type == NULL || bus_type == &mp_type_NoneType) {
             continue;
@@ -193,16 +196,19 @@ static void common_hal_displayio_release_displays_impl(bool keep_primary) {
         display_buses[i].bus_base.type = &mp_type_NoneType;
     }
 
-    supervisor_stop_terminal();
+    if (!keep_primary) {
+        supervisor_stop_terminal();
+    }
 }
 
 void common_hal_displayio_release_displays(void) {
     common_hal_displayio_release_displays_impl(false);
 }
 
 void reset_displays(void) {
-    // In CircuitPython 10, release secondary displays before doing anything else:
-    // common_hal_displayio_release_displays_impl(true);
+    // TODO: In CircuitPython 11, uncomment the call.
+    // Release secondary displays.
+    // common_hal_displayio_release_displays_impl(/*keep_primary*/ true);
 
     // The SPI buses used by FourWires may be allocated on the heap so we need to move them inline.
     for (uint8_t i = 0; i < CIRCUITPY_DISPLAY_LIMIT; i++) {