[Keymap] fixed oled turn-off issue for crkbd:gotham (#16748)

keyboards/crkbd/keymaps/gotham/README.md

@@ -10,7 +10,6 @@ My take on the 40% layout with programming in mind. Do read about the layers, it
 
 ## Custom OLED
 This keymap includes custom OLED font and code. The font contains some logos and status indidcators for some of the features I use (RGB and Audio). Enable OLED in rukes.mk to check it out. Feel free to reuse the font or parts of it.
-__KNOWN BUG:__ When the computer sleeps, one of the OLEDs is always on (they don't turn off on their own, and the timeout doesn't work). I haven't been able to figure out what's going on there and am open to suggestions/PRs.
 
 ## Flashing
 Flash using `make crkbd:gotham:avrdude` for Pro Micro and `make crkbd:gotham:dfu` for Elite-C.

keyboards/crkbd/keymaps/gotham/config.h

@@ -20,7 +20,16 @@
 #    define AUDIO_CLICKY
 #endif
 
+#ifdef OLED_ENABLE
 #    define OLED_FONT_H "keyboards/crkbd/keymaps/gotham/glcdfont.c"
+#    define SPLIT_LAYER_STATE_ENABLE
+#    define SPLIT_LED_STATE_ENABLE
+#    define SPLIT_MODS_ENABLE
+#    define SPLIT_OLED_ENABLE
+#    undef  OLED_TIMEOUT
+        //  due to timer_read() for render_prompt(), we have own implementation of oled time out
+#    define OLED_KEY_TIMEOUT 30000
+#endif
 
 #define RGBLIGHT_SLEEP
 

keyboards/crkbd/keymaps/gotham/keymap.c

@@ -81,6 +81,7 @@ bool process_record_user(uint16_t keycode, keyrecord_t *record) {
 #ifdef OLED_ENABLE
     if (record->event.pressed) {
         oled_timer = timer_read();
+        is_key_processed = true;
         add_keylog(keycode);
     }
 #endif

keyboards/crkbd/keymaps/gotham/oled.c

@@ -144,6 +144,7 @@ void render_feature_status(void) {
 // Keylogger
 #define KEYLOGGER_LENGTH 5
 static uint16_t oled_timer                       = 0;
+static bool     is_key_processed                 = true;
 static char     keylog_str[KEYLOGGER_LENGTH + 1] = {"\n"};
 // clang-format off
 static const char PROGMEM code_to_name[0xFF] = {
@@ -247,18 +248,13 @@ oled_rotation_t oled_init_user(oled_rotation_t rotation) {
 }
 
 bool oled_task_user(void) {
-    if (timer_elapsed(oled_timer) > 10000) {
-        oled_off();
-        return;
-    }
-    #ifndef SPLIT_KEYBOARD
-    else {
-        oled_on();
-    }
-    #endif
-
     if (is_keyboard_master()) {
+        if (is_key_processed && (timer_elapsed(oled_timer) < OLED_KEY_TIMEOUT)) {
             render_status_main();
+        } else {
+            is_key_processed = false;
+            oled_off();
+        }
     } else {
         render_status_secondary();
     }