Vial port for Sol 3. Place these in vial-qmk/keyboards/rgbkb/sol3/keymaps/vial and run `make rgbkb/sol3:vial`.

config.h

/*
 * ----------------------------------------------------------------------------
 * "THE BEER-WARE LICENSE" (Revision 42):
 * <https://github.com/Legonut> wrote this file.  As long as you retain this
 * notice you can do whatever you want with this stuff. If we meet some day, and
 * you think this stuff is worth it, you can buy me a beer in return. David Rauseo
 * ----------------------------------------------------------------------------
 */

#pragma once

#define RGB_MATRIX_FRAMEBUFFER_EFFECTS
#define RGB_MATRIX_KEYPRESSES

// 20m timeout (20m * 60s * 1000mil)
#define RGB_DISABLE_TIMEOUT 1800000
#define RGB_DISABLE_WHEN_USB_SUSPENDED

#define STM32_ONBOARD_EEPROM_SIZE 2048

#define VIAL_KEYBOARD_UID {0x65, 0xA0, 0x5D, 0x37, 0xDA, 0x13, 0x6E, 0x3F}

/* RGB LED Configuration */
#define RGB_DI_PIN B5
#define RGBLED_NUM 156
#define RGBLED_SPLIT { 78, 78 }
#define RGBLIGHT_LIMIT_VAL 255

// RGB Lighting Animation modes. Explicitly enabled
// For full list of effects, see:
// https://docs.qmk.fm/#/feature_rgblight?id=effect-and-animation-toggles
#define RGBLIGHT_EFFECT_BREATHING
#define RGBLIGHT_EFFECT_RAINBOW_MOOD
#define RGBLIGHT_EFFECT_RAINBOW_SWIRL
#define RGBLIGHT_EFFECT_SNAKE
#define RGBLIGHT_EFFECT_KNIGHT
#define RGBLIGHT_EFFECT_CHRISTMAS
#define RGBLIGHT_EFFECT_STATIC_GRADIENT
#define RGBLIGHT_EFFECT_RGB_TEST
#define RGBLIGHT_EFFECT_ALTERNATING
#define RGBLIGHT_EFFECT_TWINKLE

#define DRIVER_LED_TOTAL RGBLED_NUM
#define RGB_MATRIX_SPLIT RGBLED_SPLIT
#define RGB_MATRIX_CENTER { 81, 28 }
#define RGB_MATRIX_MAXIMUM_BRIGHTNESS RGBLIGHT_LIMIT_VAL
#define RGB_MATRIX_LED_FLUSH_LIMIT 33
#define RGB_MATRIX_LED_PROCESS_LIMIT 10
#define RGB_DISABLE_WHEN_USB_SUSPENDED

// RGB Matrix Animation modes. Explicitly enabled
// For full list of effects, see:
// https://docs.qmk.fm/#/feature_rgb_matrix?id=rgb-matrix-effects
#define ENABLE_RGB_MATRIX_ALPHAS_MODS
#define ENABLE_RGB_MATRIX_GRADIENT_UP_DOWN
#define ENABLE_RGB_MATRIX_GRADIENT_LEFT_RIGHT
#define ENABLE_RGB_MATRIX_BREATHING
#define ENABLE_RGB_MATRIX_BAND_SAT
#define ENABLE_RGB_MATRIX_BAND_VAL
#define ENABLE_RGB_MATRIX_BAND_PINWHEEL_SAT
#define ENABLE_RGB_MATRIX_BAND_PINWHEEL_VAL
#define ENABLE_RGB_MATRIX_BAND_SPIRAL_SAT
#define ENABLE_RGB_MATRIX_BAND_SPIRAL_VAL
#define ENABLE_RGB_MATRIX_CYCLE_ALL
#define ENABLE_RGB_MATRIX_CYCLE_LEFT_RIGHT
#define ENABLE_RGB_MATRIX_CYCLE_UP_DOWN
#define ENABLE_RGB_MATRIX_RAINBOW_MOVING_CHEVRON
#define ENABLE_RGB_MATRIX_CYCLE_OUT_IN
#define ENABLE_RGB_MATRIX_CYCLE_OUT_IN_DUAL
#define ENABLE_RGB_MATRIX_CYCLE_PINWHEEL
#define ENABLE_RGB_MATRIX_CYCLE_SPIRAL
#define ENABLE_RGB_MATRIX_DUAL_BEACON
#define ENABLE_RGB_MATRIX_RAINBOW_BEACON
#define ENABLE_RGB_MATRIX_RAINBOW_PINWHEELS
#define ENABLE_RGB_MATRIX_RAINDROPS
#define ENABLE_RGB_MATRIX_JELLYBEAN_RAINDROPS
#define ENABLE_RGB_MATRIX_HUE_BREATHING
#define ENABLE_RGB_MATRIX_HUE_PENDULUM
#define ENABLE_RGB_MATRIX_HUE_WAVE
#define ENABLE_RGB_MATRIX_PIXEL_RAIN
#define ENABLE_RGB_MATRIX_PIXEL_FLOW
#define ENABLE_RGB_MATRIX_PIXEL_FRACTAL
// enabled only if RGB_MATRIX_FRAMEBUFFER_EFFECTS is defined
#define RGB_MATRIX_FRAMEBUFFER_EFFECTS
#define ENABLE_RGB_MATRIX_TYPING_HEATMAP
#define ENABLE_RGB_MATRIX_DIGITAL_RAIN
// enabled only of RGB_MATRIX_KEYPRESSES or RGB_MATRIX_KEYRELEASES is defined
#define RGB_MATRIX_KEYPRESSES
#define ENABLE_RGB_MATRIX_SOLID_REACTIVE_SIMPLE
#define ENABLE_RGB_MATRIX_SOLID_REACTIVE
#define ENABLE_RGB_MATRIX_SOLID_REACTIVE_WIDE
#define ENABLE_RGB_MATRIX_SOLID_REACTIVE_MULTIWIDE
#define ENABLE_RGB_MATRIX_SOLID_REACTIVE_CROSS
#define ENABLE_RGB_MATRIX_SOLID_REACTIVE_MULTICROSS
#define ENABLE_RGB_MATRIX_SOLID_REACTIVE_NEXUS
#define ENABLE_RGB_MATRIX_SOLID_REACTIVE_MULTINEXUS
#define ENABLE_RGB_MATRIX_SPLASH
#define ENABLE_RGB_MATRIX_MULTISPLASH
#define ENABLE_RGB_MATRIX_SOLID_SPLASH
#define ENABLE_RGB_MATRIX_SOLID_MULTISPLASH

#define WS2812_PWM_DRIVER PWMD3
#define WS2812_PWM_CHANNEL 2
#define WS2812_PWM_PAL_MODE 2
#define WS2812_DMA_STREAM STM32_DMA1_STREAM3
#define WS2812_DMA_CHANNEL 3

rules.mk

VIA_ENABLE = yes
VIAL_ENABLE = yes
VIAL_INSECURE = yes
VIALRGB_ENABLE = yes

# MCU name
MCU = STM32F303

# Bootloader selection
BOOTLOADER = stm32-dfu

# Touch encoder needs
VPATH += keyboards/rgbkb/common
SRC += touch_encoder.c
SRC += common_oled.c
QUANTUM_LIB_SRC += i2c_master.c

# Build Options
#   change yes to no to disable
#
BOOTMAGIC_ENABLE = yes      # Enable Bootmagic Lite
MOUSEKEY_ENABLE = no        # Mouse keys
EXTRAKEY_ENABLE = yes       # Audio control and System control
CONSOLE_ENABLE = yes        # Console for debug
COMMAND_ENABLE = no         # Commands for debug and configuration
NKRO_ENABLE = yes           # Enable N-Key Rollover
AUDIO_ENABLE = yes          # Audio output
AUDIO_DRIVER = dac_additive

DYNAMIC_MACRO_ENABLE = yes
DIP_SWITCH_ENABLE = yes

WS2812_DRIVER = pwm
RGBLIGHT_ENABLE = no
RGB_MATRIX_ENABLE = yes
RGB_MATRIX_DRIVER = WS2812

OLED_ENABLE = yes
OLED_DRIVER = SSD1306    # Enable the OLED Driver

ENCODER_ENABLE = yes

SPLIT_KEYBOARD = yes
SERIAL_DRIVER = usart
LTO_ENABLE = yes
OPT = 3

OPT_DEFS += -DOLED_FONT_H=\"keyboards/rgbkb/common/glcdfont.c\"

vial.json

{
    "lighting": "vialrgb",
    "matrix": {
        "rows": 12,
        "cols": 8
    },
    "layouts": {
        "keymap":
        [
            [
              {
                "w": 1.5
              },
              "0,0",
              "0,1",
              "0,2",
              "0,3",
              "0,4",
              "0,5",
              "0,6",
              {
                "x": 4.5
              },
              "6,6",
              "6,5",
              "6,4",
              "6,3",
              "6,2",
              "6,1",
              {
                "w": 1.5
              },
              "6,0"
            ],
            [
              {
                "w": 1.5
              },
              "1,0",
              "1,1",
              "1,2",
              "1,3",
              "1,4",
              "1,5",
              "1,6",
              {
                "x": 4.5
              },
              "7,6",
              "7,5",
              "7,4",
              "7,3",
              "7,2",
              "7,1",
              {
                "w": 1.5
              },
              "7,0"
            ],
            [
              {
                "w": 1.5
              },
              "2,0",
              "2,1",
              "2,2",
              "2,3",
              "2,4",
              "2,5",
              "2,6",
              {
                "x": 4.5
              },
              "8,6",
              "8,5",
              "8,4",
              "8,3",
              "8,2",
              "8,1",
              {
                "w": 1.5
              },
              "8,0"
            ],
            [
              {
                "w": 1.5
              },
              "3,0",
              "3,1",
              "3,2",
              "3,3",
              "3,4",
              "3,5",
              "3,6",
              {
                "x": 4.5
              },
              "9,6",
              "9,5",
              "9,4",
              "9,3",
              "9,2",
              "9,1",
              {
                "w": 1.5
              },
              "9,0"
            ],
            [
              {
                "w": 1.5
              },
              "4,0",
              "4,1",
              "4,2",
              "4,3",
              "4,4",
              {
                "x": 8.5
              },
              "10,4",
              "10,3",
              "10,2",
              "10,1",
              {
                "w": 1.5
              },
              "10,0"
            ],
            [
              {
                "r": 30,
                "rx": 6.5,
                "ry": 4.25,
                "x": 1,
                "h": 2
              },
              "4,5",
              "4,6"
            ],
            [
              {
                "x": 2
              },
              "4,7"
            ],
            [
              {
                "r": -30,
                "rx": 13,
                "x": -3
              },
              "10,6",
              {
                "h": 2
              },
              "10,5"
            ],
            [
              {
                "x": -3
              },
              "10,7"
            ]
        ]
    }
}