Remove RING_BUFFERED_6KRO_REPORT_ENABLE due to disuse. (#24433)

builddefs/show_options.mk

@@ -67,7 +67,6 @@ OTHER_OPTION_NAMES = \
   PS2_DRIVER \
   RAW_ENABLE \
   SWAP_HANDS_ENABLE \
-  RING_BUFFERED_6KRO_REPORT_ENABLE \
   WATCHDOG_ENABLE \
   ERGOINU \
   NO_USB_STARTUP_CHECK \

docs/config_options.md

@@ -426,8 +426,6 @@ Use these to enable or disable building certain features. The more you have enab
   * Key combo feature
 * `NKRO_ENABLE`
   * USB N-Key Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
-* `RING_BUFFERED_6KRO_REPORT_ENABLE`
-  * USB 6-Key Rollover - Instead of stopping any new input once 6 keys are pressed, the oldest key is released and the new key is pressed.
 * `AUDIO_ENABLE`
   * Enable the audio subsystem.
 * `KEY_OVERRIDE_ENABLE`

tests/test_common/keyboard_report_util.cpp

@@ -29,8 +29,6 @@ std::vector<uint8_t> get_keys(const report_keyboard_t& report) {
     std::vector<uint8_t> result;
 #if defined(NKRO_ENABLE)
 #    error NKRO support not implemented yet
-#elif defined(RING_BUFFERED_6KRO_REPORT_ENABLE)
-#    error 6KRO support not implemented yet
 #else
     for (size_t i = 0; i < KEYBOARD_REPORT_KEYS; i++) {
         if (report.keys[i]) {

tmk_core/protocol.mk

@@ -54,10 +54,6 @@ ifeq ($(strip $(NKRO_ENABLE)), yes)
     endif
 endif
 
-ifeq ($(strip $(RING_BUFFERED_6KRO_REPORT_ENABLE)), yes)
-    OPT_DEFS += -DRING_BUFFERED_6KRO_REPORT_ENABLE
-endif
-
 ifeq ($(strip $(NO_SUSPEND_POWER_DOWN)), yes)
     OPT_DEFS += -DNO_SUSPEND_POWER_DOWN
 endif

tmk_core/protocol/report.c

@@ -22,16 +22,6 @@
 #include "util.h"
 #include <string.h>
 
-#ifdef RING_BUFFERED_6KRO_REPORT_ENABLE
-#    define RO_ADD(a, b) ((a + b) % KEYBOARD_REPORT_KEYS)
-#    define RO_SUB(a, b) ((a - b + KEYBOARD_REPORT_KEYS) % KEYBOARD_REPORT_KEYS)
-#    define RO_INC(a) RO_ADD(a, 1)
-#    define RO_DEC(a) RO_SUB(a, 1)
-static int8_t cb_head  = 0;
-static int8_t cb_tail  = 0;
-static int8_t cb_count = 0;
-#endif
-
 /** \brief has_anykey
  *
  * FIXME: Needs doc
@@ -65,18 +55,7 @@ uint8_t get_first_key(void) {
         return i << 3 | biton(nkro_report->bits[i]);
     }
 #endif
-#ifdef RING_BUFFERED_6KRO_REPORT_ENABLE
-    uint8_t i = cb_head;
-    do {
-        if (keyboard_report->keys[i] != 0) {
-            break;
-        }
-        i = RO_INC(i);
-    } while (i != cb_tail);
-    return keyboard_report->keys[i];
-#else
     return keyboard_report->keys[0];
-#endif
 }
 
 /** \brief Checks if a key is pressed in the report
@@ -110,50 +89,6 @@ bool is_key_pressed(uint8_t key) {
  * FIXME: Needs doc
  */
 void add_key_byte(report_keyboard_t* keyboard_report, uint8_t code) {
-#ifdef RING_BUFFERED_6KRO_REPORT_ENABLE
-    int8_t i     = cb_head;
-    int8_t empty = -1;
-    if (cb_count) {
-        do {
-            if (keyboard_report->keys[i] == code) {
-                return;
-            }
-            if (empty == -1 && keyboard_report->keys[i] == 0) {
-                empty = i;
-            }
-            i = RO_INC(i);
-        } while (i != cb_tail);
-        if (i == cb_tail) {
-            if (cb_tail == cb_head) {
-                // buffer is full
-                if (empty == -1) {
-                    // pop head when has no empty space
-                    cb_head = RO_INC(cb_head);
-                    cb_count--;
-                } else {
-                    // left shift when has empty space
-                    uint8_t offset = 1;
-                    i              = RO_INC(empty);
-                    do {
-                        if (keyboard_report->keys[i] != 0) {
-                            keyboard_report->keys[empty] = keyboard_report->keys[i];
-                            keyboard_report->keys[i]     = 0;
-                            empty                        = RO_INC(empty);
-                        } else {
-                            offset++;
-                        }
-                        i = RO_INC(i);
-                    } while (i != cb_tail);
-                    cb_tail = RO_SUB(cb_tail, offset);
-                }
-            }
-        }
-    }
-    // add to tail
-    keyboard_report->keys[cb_tail] = code;
-    cb_tail                        = RO_INC(cb_tail);
-    cb_count++;
-#else
     int8_t i     = 0;
     int8_t empty = -1;
     for (; i < KEYBOARD_REPORT_KEYS; i++) {
@@ -169,7 +104,6 @@ void add_key_byte(report_keyboard_t* keyboard_report, uint8_t code) {
             keyboard_report->keys[empty] = code;
         }
     }
-#endif
 }
 
 /** \brief del key byte
@@ -177,38 +111,11 @@ void add_key_byte(report_keyboard_t* keyboard_report, uint8_t code) {
  * FIXME: Needs doc
  */
 void del_key_byte(report_keyboard_t* keyboard_report, uint8_t code) {
-#ifdef RING_BUFFERED_6KRO_REPORT_ENABLE
-    uint8_t i = cb_head;
-    if (cb_count) {
-        do {
-            if (keyboard_report->keys[i] == code) {
-                keyboard_report->keys[i] = 0;
-                cb_count--;
-                if (cb_count == 0) {
-                    // reset head and tail
-                    cb_tail = cb_head = 0;
-                }
-                if (i == RO_DEC(cb_tail)) {
-                    // left shift when next to tail
-                    do {
-                        cb_tail = RO_DEC(cb_tail);
-                        if (keyboard_report->keys[RO_DEC(cb_tail)] != 0) {
-                            break;
-                        }
-                    } while (cb_tail != cb_head);
-                }
-                break;
-            }
-            i = RO_INC(i);
-        } while (i != cb_tail);
-    }
-#else
     for (uint8_t i = 0; i < KEYBOARD_REPORT_KEYS; i++) {
         if (keyboard_report->keys[i] == code) {
             keyboard_report->keys[i] = 0;
         }
     }
-#endif
 }
 
 #ifdef NKRO_ENABLE