Add default limit to OLED dirty processing (#19068)

2 files changed, 7 insertions, 2 deletions

diff --git a/drivers/oled/oled_driver.h b/drivers/oled/oled_driver.h
index e9b8c5b4e8..291049e36b 100644
--- a/drivers/oled/oled_driver.h
+++ b/drivers/oled/oled_driver.h
@@ -170,6 +170,10 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #    define OLED_UPDATE_INTERVAL 50
 #endif
 
+#if !defined(OLED_UPDATE_PROCESS_LIMIT)
+#    define OLED_UPDATE_PROCESS_LIMIT 1
+#endif
+
 typedef struct __attribute__((__packed__)) {
     uint8_t *current_element;
     uint16_t remaining_element_count;
diff --git a/drivers/oled/ssd1306_sh1106.c b/drivers/oled/ssd1306_sh1106.c
index 9fc8c2d2ad..342920572e 100644
--- a/drivers/oled/ssd1306_sh1106.c
+++ b/drivers/oled/ssd1306_sh1106.c
@@ -300,8 +300,9 @@ void oled_render(void) {
     // Turn on display if it is off
     oled_on();
 
-    uint8_t update_start = 0;
-    while (oled_dirty) { // render all dirty blocks
+    uint8_t update_start  = 0;
+    uint8_t num_processed = 0;
+    while (oled_dirty && num_processed++ < OLED_UPDATE_PROCESS_LIMIT) { // render all dirty blocks (up to the configured limit)
         // Find next dirty block
         while (!(oled_dirty & ((OLED_BLOCK_TYPE)1 << update_start))) {
             ++update_start;