rgblight split transfer non-eeprom config (#5396)

* Make rgblight_update_dword not update eeprom (we already have
eeconfig_update_rgblight for that).

Make split i2c keyboards transfer active rgblight config rather than
eeprom saved version of rgblight config, enabling runtime changes
that aren't persisted to eeprom.

* prev_level and prev_rgb only store successfully transmitted values

1 files changed, 5 insertions, 2 deletions

diff --git a/quantum/rgblight.c b/quantum/rgblight.c
index 52e0be8ba..119ca1b9e 100644
--- a/quantum/rgblight.c
+++ b/quantum/rgblight.c
@@ -225,11 +225,14 @@ void rgblight_init(void) {
 
 }
 
+uint32_t rgblight_read_dword(void) {
+  return rgblight_config.raw;
+}
+
 void rgblight_update_dword(uint32_t dword) {
   rgblight_config.raw = dword;
-  eeconfig_update_rgblight(rgblight_config.raw);
   if (rgblight_config.enable)
-    rgblight_mode(rgblight_config.mode);
+    rgblight_mode_noeeprom(rgblight_config.mode);
   else {
 #ifdef RGBLIGHT_USE_TIMER
       rgblight_timer_disable();