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VAMeter","official_name_verified":true,"aliases":["vameter","va meter","voltage and amperage meter"],"legacy_board_id":16,"chip":"esp32s3","spec":{"display":{"resolution":[240,240],"touch":false},"storage":{"psram_mb":0,"sd":false}},"pins":{"0":{"roles":["dev:btn_b.in"]},"2":{"roles":["dev:btn_a.in"]},"5":{"roles":["bus:internal_i2c.sda"],"note":"System I2C SDA","verified":{"roles":"generated"}},"6":{"roles":["bus:internal_i2c.scl"],"note":"System I2C SCL","verified":{"roles":"generated"}},"7":{"roles":[],"note":"Not connected"},"8":{"roles":["bus:port_a_i2c.sda","conn:port_a.2"],"note":"External Port A SDA","verified":{"roles":"generated"}},"9":{"roles":["bus:port_a_i2c.scl","conn:port_a.1"],"note":"External Port A SCL","verified":{"roles":"generated"}},"33":{"roles":["dev:lcd.rst"]},"34":{"roles":["dev:lcd.dc"]},"35":{"roles":["bus:main_spi.mosi"],"verified":{"roles":"generated"}},"36":{"roles":["bus:main_spi.sclk"],"verified":{"roles":"generated"}},"37":{"roles":["dev:lcd.cs"]},"38":{"roles":["dev:backlight.pwm"]}},"buses":{"main_spi":{"kind":"spi","signals":["sclk","mosi"],"preferred_host":"SPI3_HOST","fixed":false,"freq":40000000,"freq_read":16000000,"verified":{"signals":"generated","preferred_host":"generated","freq":"generated","freq_read":"generated"}},"internal_i2c":{"kind":"i2c","signals":["sda","scl"],"preferred_host":1,"fixed":false,"verified":{"signals":"generated","preferred_host":"generated"}},"port_a_i2c":{"kind":"i2c","signals":["sda","scl"],"preferred_host":0,"fixed":false,"verified":{"signals":"generated","preferred_host":"generated"}}},"devices":{"lcd":{"kind":"display","part":"st7789v2","bus":"main_spi","spec":{"width":240,"height":240,"offset_x":0,"offset_y":0,"rotation_offset":0,"invert":true,"readable":true}},"backlight":{"kind":"backlight","spec":{"freq":512,"channel":7,"invert":false,"offset":64},"verified":{"spec":"generated"}},"probe_device_0":{"kind":"sensor","bus":"internal_i2c","i2c_addr":"0x40","verified":{"i2c_addr":"datasheet"}},"probe_device_1":{"kind":"sensor","bus":"internal_i2c","i2c_addr":"0x41","verified":{"i2c_addr":"datasheet"}},"btn_a":{"kind":"button","part":"button","spec":{"active_low":true,"pull":"external_up"}},"btn_b":{"kind":"button","part":"button","spec":{"active_low":true,"pull":"external_up"}}},"connectors":{"port_a":{"type":"hy2_4p","standard":"port_i2c"}}}}</script>
   <script>
 // lib/model.js
diff --git a/extras/board_spec/targets.json b/extras/board_spec/targets.json
index 0d5b88a..b535300 100644
--- a/extras/board_spec/targets.json
+++ b/extras/board_spec/targets.json
@@ -58,18 +58,18 @@
         "chip": "esp32s3", "legacy_board_id": 10, "cpp_namespace": "cores3", "board_enum": "board_M5StackCoreS3", "desc_name": "desc_cores3",
         "wiring_fields": ["display", "shared_sd", "i2c", "hold", "touch", "camera"], "desc_internal_i2c": true, "wiring_output": "esp32s3_wiring.hpp",
         "specs_output": "esp32s3_specs.hpp", "identity_devices": ["io_expander", "camera"],
-        "options": [{ "name": "vbus_5v", "bit": 0 }, { "name": "internal_camera_confirmed", "bit": 1 }],
+        "options": [{ "name": "vbus_5v", "bit": 0 }, { "name": "internal_camera_confirmed", "bit": 1 }, { "name": "lcd_e", "bit": 2 }],
         "release_probe": { "pins": ["dev:camera.href", "dev:camera.d0", "dev:camera.d1", "dev:camera.d2", "dev:camera.d3", "dev:camera.vsync", "dev:camera.d7", "dev:camera.d6"], "reads": 256, "samples": 9, "settle_us": 10, "short_max_ns": 260, "long_min_ns": 330 }
       },
       "m5stack_cores3se": {
         "chip": "esp32s3", "legacy_board_id": 17, "cpp_namespace": "cores3se", "board_enum": "board_M5StackCoreS3SE", "desc_name": "desc_cores3se",
         "wiring_fields": ["display", "shared_sd", "i2c", "hold", "touch"], "desc_internal_i2c": true, "wiring_output": "esp32s3_wiring.hpp",
-        "specs_output": "esp32s3_specs.hpp", "identity_devices": ["io_expander"], "options": [{ "name": "vbus_5v", "bit": 0 }]
+        "specs_output": "esp32s3_specs.hpp", "identity_devices": ["io_expander"], "options": [{ "name": "vbus_5v", "bit": 0 }, { "name": "reserved", "bit": 1 }, { "name": "lcd_e", "bit": 2 }]
       },
       "m5stack_stackchan": {
         "chip": "esp32s3", "legacy_board_id": 27, "cpp_namespace": "stackchan", "board_enum": "board_M5StackChan", "desc_name": "desc_stackchan",
         "wiring_fields": ["display", "shared_sd", "i2c", "hold", "touch"], "desc_internal_i2c": true, "wiring_output": "esp32s3_wiring.hpp",
-        "specs_output": "esp32s3_specs.hpp", "identity_devices": ["io_expander", "camera", "stackchan_ioe"], "options": [{ "name": "vbus_5v", "bit": 0 }]
+        "specs_output": "esp32s3_specs.hpp", "identity_devices": ["io_expander", "camera", "stackchan_ioe"], "options": [{ "name": "vbus_5v", "bit": 0 }, { "name": "reserved", "bit": 1 }, { "name": "lcd_e", "bit": 2 }]
       },
       "m5atoms3": {
         "chip": "esp32s3", "legacy_board_id": 11, "cpp_namespace": "atoms3", "board_enum": "board_M5AtomS3", "desc_name": "desc_atoms3",
diff --git a/extras/board_spec/test/board_spec.test.js b/extras/board_spec/test/board_spec.test.js
index 510468c..1305ce7 100644
--- a/extras/board_spec/test/board_spec.test.js
+++ b/extras/board_spec/test/board_spec.test.js
@@ -1221,7 +1221,8 @@ test("ESP32-C6 catalogs and detector preserve both display boards", async () =>
   assert.match(esp32c6Source,
     /gpio_reset\(wiring::unitc6l::reset_gpio, 2, 10, reset_hold_when_skipped\)/);
   assert.match(esp32c6SetupSource,
-    /_read_panel_id[\s\S]*?panel ID mismatch[\s\S]*?make_panel<lgfx::Panel_ST7789>/);
+    /make_spi_bus\(bus_nesson1\)[\s\S]*?make_panel<lgfx::Panel_ST7789>/);
+  assert.doesNotMatch(esp32c6SetupSource, /_read_panel_id/);
   assert.match(esp32c6SetupSource, /with_bus_shared\(true\)/);
   assert.match(esp32c6SetupSource,
     /backlight_i2c::i2c_addr[\s\S]*?backlight_i2c::i2c_freq/);
@@ -2322,7 +2323,7 @@ test("CoreP4X generated DSI setup preserves the legacy fields", async () => {
   assert.match(main, /pkg_ver == 0[\s\S]*?try_setup_detected\(board_detect::m5::esp32p4_detectors/);
 });
 
-test("Tab5 generated DSI setup preserves all three legacy panels", () => {
+test("Tab5 touch identities select the three DSI panels", () => {
   const source = catalogBoards.find((item) => item.id === "m5stack_tab5");
   const resolved = resolveCatalog(source).map((item) => item.board);
   const specs = emitM5GFXSpecs(source, resolved, parts, m5gfxBoardMapping(target, source.id));
@@ -2332,6 +2333,9 @@ test("Tab5 generated DSI setup preserves all three legacy panels", () => {
   // requires 900 Mbps after runtime touch-FW identification.
   assert.match(tab5SetupSource, /tab5_st7121_lane_mbps = 900/);
   assert.match(tab5SetupSource, /hit_st7121 \? tab5_st7121_lane_mbps : specs::tab5::bus_lane_mbps/);
+  assert.match(tab5SetupSource, /fw_version == 1[\s\S]*?hit_st7121 = true[\s\S]*?fw_version == 3[\s\S]*?hit_st7123 = true/);
+  assert.match(tab5SetupSource, /if \(!read_st_touch_fw && !found_gt911\)[\s\S]*?delay\(80\)[\s\S]*?i < 3 && !hit_ili9881[\s\S]*?id\[0\] == 0x98 && id\[1\] == 0x81/);
+  assert.match(tab5SetupSource, /if \(found_gt911 \|\| hit_ili9881\)[\s\S]*?Panel_ILI9881C/);
   assert.equal(specs.panels.ili9881c.dpi_freq_mhz, 80);
   assert.equal(specs.panels.st7121.dpi_freq_mhz, 70);
   assert.equal(specs.panels.st7123.vsync_back_porch + specs.panels.st7123.vsync_pulse_width, 10);
@@ -2521,7 +2525,12 @@ test("CoreS3 family catalog keeps shared wiring and option power variants", asyn
   assert.match(opsSource, /cores3_vbus_off_power_on\[] = \{[\s\S]*?cores3_vbus_5v_power_on\[] = \{/);
   const coreSetup = await fs.readFile(
     path.join(root, "../../src/board_detect/m5/esp32s3/cores3_setup.inl"), "utf8");
-  assert.match(coreSetup, /cores3_legacy_panel_id_freq = 8000000[\s\S]*?make_spi_bus\(bus_cores3_panel_id\)[\s\S]*?_read_panel_id[\s\S]*?freq_write = bus_cores3\.freq_write[\s\S]*?freq_read = bus_cores3\.freq_read[\s\S]*?_identify_ili9342/);
+  assert.match(coreSource, /refine_panel[\s\S]*?soft_spi_read32[\s\S]*?identify_panel_variant[\s\S]*?cores3::lcd_e/);
+  assert.match(coreSetup, /make_spi_bus\(bus_cores3\)[\s\S]*?result\.option & generated_options::cores3::lcd_e/);
+  const detectorSource = await fs.readFile(
+    path.join(root, "../../src/board_detect/board_detect.inl"), "utf8");
+  assert.match(detectorSource, /beginRead[\s\S]*?pin_miso_ == pin_dc_[\s\S]*?pin_mode_t::input/);
+  assert.match(detectorSource, /endRead[\s\S]*?pin_miso_ == pin_dc_[\s\S]*?pin_mode_t::output/);
   const main = await fs.readFile(path.join(root, "../../src/M5GFX.cpp"), "utf8");
   assert.match(main, /assigned before prepare\/refine[\s\S]*?representative family ID[\s\S]*?setup_board = static_cast<board_t>\(result\.def->id\)/);
   assert.match(main, /case 0: detectors = board_detect::m5::esp32s3_detectors_qfn56;[\s\S]*?case 1: detectors = board_detect::m5::esp32s3_detectors_lga56;[\s\S]*?try_setup_detected\(detectors, board/);
diff --git a/src/M5GFX.cpp b/src/M5GFX.cpp
index f264ace..7893fcb 100644
--- a/src/M5GFX.cpp
+++ b/src/M5GFX.cpp
@@ -18,7 +18,6 @@
 #include <soc/efuse_reg.h>
 #include <soc/gpio_reg.h>
 
-#include "lgfx/v1/panel/Panel_AMOLED.hpp"
 #include "lgfx/v1/panel/Panel_CO5300.hpp"
 #include "lgfx/v1/panel/Panel_ILI9342.hpp"
 #include "lgfx/v1/panel/Panel_SSD1306.hpp"
@@ -65,8 +64,6 @@
 #include "lgfx/v1/platforms/esp32p4/Panel_ST7123.hpp"
 #include "lgfx/v1/platforms/esp32p4/Touch_ST7123.hpp"
 
-static constexpr int_fast16_t in_i2c_port = I2C_NUM_1;
-
 #elif defined ( CONFIG_IDF_TARGET_ESP32S3 )
 
 #include "lgfx/v1/panel/Panel_ED2208.hpp"
@@ -112,124 +109,9 @@ namespace m5gfx
 
 #if defined ( ESP_PLATFORM )
 
-  // ボード未確定段階の I2C プローブに使うソフトウェア I2C ポート (GPIO ビットバン)。
-  // ハードウェアのペリフェラルを一切確保・設定しないため、候補ボードの試行が
-  // ペリフェラルやピンの状態を汚さない。ボード確定後の常用バスは従来どおり
-  // ハードウェアポートを使う。
-  __attribute__ ((unused))
+  // 判別 transaction の候補機種 I2C プローブはソフトウェアポートを使う。
   static constexpr int_fast16_t probe_i2c_port = -1;
 
-  // ボード未確定段階の探索をソフト I2C で行い、確定時に常用のハードウェアポートへ引き継ぐ。
-  // probe が変えたパッドの配線 (pinMode による GPIO 出力への付け替え) は引き継ぎ前に戻す:
-  // アプリが先に同じポートを開いていた共有バスでは init() がピンに触らないため、
-  // 戻さないと以後の HW I2C が通らない。
-  struct __attribute__ ((unused)) probe_i2c_t
-  {
-    probe_i2c_t(int sda, int scl) : _pins { sda, scl }, _sda { sda }, _scl { scl }
-    {
-      lgfx::i2c::init(probe_i2c_port, _sda, _scl);
-    }
-    // パッドが probe の前に既に触られている (プルアップ試験など) ブロックでは、
-    // その前に取ったバックアップを渡して復元先にする
-    probe_i2c_t(const gpio::pin_backup_t& sda_backup, const gpio::pin_backup_t& scl_backup)
-    : _pins { sda_backup, scl_backup }, _sda { sda_backup.getPin() }, _scl { scl_backup.getPin() }
-    {
-      lgfx::i2c::init(probe_i2c_port, _sda, _scl);
-    }
-    // ボードが確定した: probe を閉じ、パッドを戻してから常用ポートを開く。
-    // 開けなくてもボードの判定は取り消さない (表示まで失うため)。バックライトやタッチなど
-    // このポートの利用者が通信できなくなるので、原因が追えるよう警告だけ残す
-    void handover(int hw_port)
-    {
-      release();
-      if (!lgfx::i2c::init(hw_port, _sda, _scl).has_value())
-      {
-        ESP_LOGW(LIBRARY_NAME, "[Autodetect] I2C port %d could not be opened for SDA=%d SCL=%d", hw_port, _sda, _scl);
-      }
-    }
-    // ボードが一致しなかった: probe を閉じ、パッドを探索前の状態に戻す
-    void release(void)
-    {
-      lgfx::i2c::release(probe_i2c_port);
-      for (auto &pin : _pins) { pin.restore(); }
-    }
-  private:
-    gpio::pin_backup_t _pins[2];
-    int _sda, _scl;
-  };
-
-  // I2Cデバイスの存在をチェックする。
-  // SDA,SCLのプルアップが確認できない場合は0を返す。
-  // 内部でパッドを backup/restore するので、呼び出し側はこの後に probe_i2c_t を作れば
-  // 探索前の状態を復元先にできる (プルアップ試験を自前で行うブロックは試験前の backup を渡す)。
-  // プルアップが確認できた場合は ~0u を返すが、存在しないデバイスに対応するビットは 0 となる。
-  // つまり、引数のアドレスリストにある全てのデバイスが存在する場合は ~0u となる。
-  __attribute__ ((unused))
-  static uint32_t _detect_i2c_device(uint8_t pin_sda, uint8_t pin_scl, const uint8_t* addr_list) {
-    gpio::pin_backup_t backup_pins[] = { pin_sda, pin_scl };
-
-    const uint8_t cmd_i2c_stop_list[] = {
-    lgfx::gpio::command_write_low  , pin_scl,
-    lgfx::gpio::command_delay_usec , 3,
-    lgfx::gpio::command_write_low  , pin_sda,
-    lgfx::gpio::command_delay_usec , 3,
-    lgfx::gpio::command_write_high , pin_scl, // SCL high
-    lgfx::gpio::command_delay_usec , 5,
-    lgfx::gpio::command_write_high , pin_sda, // SDA high (I2C STOP)
-    lgfx::gpio::command_delay_usec , 5,
-    lgfx::gpio::command_end
-    };
-
-    {
-      lgfx::pinMode(pin_scl, lgfx::pin_mode_t::output);
-      lgfx::pinMode(pin_sda, lgfx::pin_mode_t::output);
-      // force I2C stop
-      for (size_t i = 0; i < 8; ++i) {
-        lgfx::gpio::command(cmd_i2c_stop_list);
-      }
-    }
-
-    const uint8_t cmd_list[] = {
-    lgfx::gpio::command_write_low          , pin_scl,
-    lgfx::gpio::command_read               , pin_scl,  // low チェック
-    lgfx::gpio::command_write_low          , pin_sda,
-    lgfx::gpio::command_read               , pin_sda,  // low チェック
-    lgfx::gpio::command_mode_input_pulldown, pin_scl,
-    lgfx::gpio::command_delay_usec         , 10,
-    lgfx::gpio::command_read               , pin_scl, // pulldownチェック (外部プルアップがあるならここでHIGHになる)
-    lgfx::gpio::command_mode_input_pullup  , pin_scl,
-    lgfx::gpio::command_mode_input_pulldown, pin_sda,
-    lgfx::gpio::command_delay_usec         , 10,
-    lgfx::gpio::command_read               , pin_sda, // pulldownチェック (外部プルアップがあるならここでHIGHになる)
-    lgfx::gpio::command_mode_input_pullup  , pin_sda,
-    lgfx::gpio::command_end
-    };
-
-    // ここでSDA,SCL各2回,合計4回のreadチェックが行われる。
-    uint32_t result = lgfx::gpio::command(cmd_list);
-    // I2Cピンであれば0x03になっているはず
-    if (result == 0x03) {
-      // 全ビットを立てる
-      result = ~0u;
-
-      // アドレスの存在確認はソフトウェア I2C ポートで行う (オープンドレイン駆動で
-      // ACK 競合が起きず、ハードウェアのペリフェラルにも触れない)
-      lgfx::i2c::init(probe_i2c_port, pin_sda, pin_scl);
-      for (; addr_list[0] != 0; ++addr_list) {
-        uint_fast8_t addr7bit = addr_list[0];
-        bool hit = lgfx::i2c::beginTransaction(probe_i2c_port, addr7bit, 100000, false).has_value()
-                && lgfx::i2c::endTransaction(probe_i2c_port).has_value();
-        result = (result << 1) + hit;
-        ESP_LOGV(LIBRARY_NAME, "[Autodetect] i2c addr:%02x = %s", (int)addr7bit, hit ? "hit" : "--");
-      }
-      lgfx::i2c::release(probe_i2c_port);
-    } else {
-      result = 0;
-    }
-    for (auto pin: backup_pins) { pin.restore(); }
-    return result;
-  }
-
   static constexpr std::uint32_t m5pm1_i2c_freq = 100000;
   static constexpr std::uint8_t m5pm1_i2c_addr = 0x6E; // M5PM1 device i2c address
 
@@ -854,95 +736,7 @@ namespace m5gfx
 
 #endif
 
-  __attribute__ ((unused))
-  static void _pin_level(std::int_fast16_t pin, bool level)
-  {
-    lgfx::pinMode(pin, lgfx::pin_mode_t::output);
-    if (level) lgfx::gpio_hi(pin);
-    else       lgfx::gpio_lo(pin);
-  }
-
-  __attribute__ ((unused))
-  static void _pin_reset(std::int_fast16_t pin, bool use_reset)
-  {
-    lgfx::gpio_hi(pin);
-    lgfx::pinMode(pin, lgfx::pin_mode_t::output);
-    lgfx::delay(1);
-    if (!use_reset) return;
-    lgfx::gpio_lo(pin);
-    lgfx::delay(2);
-    lgfx::gpio_hi(pin);
-    lgfx::delay(10);
-  }
-
-  /// TF card dummy clock送信 ;
-  static void _send_sd_dummy_clock(int spi_host, int_fast16_t pin_cs)
-  {
-    static constexpr uint32_t dummy_clock[] = { ~0u, ~0u, ~0u, ~0u };
-    _pin_level(pin_cs, true);
-    m5gfx::spi::writeBytes(spi_host, (const uint8_t*)dummy_clock, sizeof(dummy_clock));
-    _pin_level(pin_cs, false);
-  }
-
-  /// TF card をSPIモードに移行する ;
-  __attribute__ ((unused))
-  static void _set_sd_spimode(int spi_host, int_fast16_t pin_cs)
-  {
-    m5gfx::spi::beginTransaction(spi_host, 400000, 0);
-    _send_sd_dummy_clock(spi_host, pin_cs);
-
-    uint8_t sd_cmd58[] = { 0x7A, 0, 0, 0, 0, 0xFD, 0xFF, 0xFF }; // READ_OCR command.
-    m5gfx::spi::readBytes(spi_host, sd_cmd58, sizeof(sd_cmd58));
-
-    if (sd_cmd58[6] == sd_cmd58[7])  // not SPI mode
-    {
-      _send_sd_dummy_clock(spi_host, pin_cs);
-
-      static constexpr uint8_t sd_cmd0[] = { 0x40, 0, 0, 0, 0, 0x95, 0xFF, 0xFF }; // GO_IDLE_STATE command.
-      m5gfx::spi::writeBytes(spi_host, sd_cmd0, sizeof(sd_cmd0));
-    }
-    _pin_level(pin_cs, true);
-    m5gfx::spi::endTransaction(spi_host);
-  }
-
-  __attribute__ ((unused))
-  static std::uint32_t _read_panel_id(lgfx::Bus_SPI* bus, std::int32_t pin_cs, std::uint32_t cmd = 0x04, std::uint8_t dummy_read_bit = 1) // 0x04 = RDDID command
-  {
-    bus->beginTransaction();
-    _pin_level(pin_cs, true);
-    bus->writeCommand(0, 8);
-    bus->wait();
-    _pin_level(pin_cs, false);
-    bus->writeCommand(cmd, 8);
-    bus->beginRead(dummy_read_bit);
-    std::uint32_t res = bus->readData(32);
-    bus->endTransaction();
-    _pin_level(pin_cs, true);
-
-    ESP_LOGD(LIBRARY_NAME, "[Autodetect] read cmd:%02x = %08x", (int)cmd, (int)res);
-    return res;
-  }
-
-#if !defined (CONFIG_IDF_TARGET) || defined (CONFIG_IDF_TARGET_ESP32) || defined (CONFIG_IDF_TARGET_ESP32S3) || defined (CONFIG_IDF_TARGET_ESP32C5) || defined (CONFIG_IDF_TARGET_ESP32C61)
-  /// Tell an ILI9342E from an ILI9342C. Two of the E's level-2 registers are written and read
-  /// back through D9h (Get External Register for SPI):
-  ///  - DDh (Set EXTC, W/R on the E) = 01h. On the C the command is undefined (a NOP).
-  ///  - CBh (Power Control 6 on the E) = 1Ch, the value the E init list writes anyway. On the
-  ///    C the command is undefined as well, so nothing is stored that could be read back.
-  /// The E reads both values back; the C returned constants (00h / 0Fh / 1Fh / 3Fh) on every
-  /// unit measured. Only values the probe wrote itself are compared, and D9h is cleared first,
-  /// so the answer does not depend on what a previous firmware left in the panel (the CoreS3
-  /// does not reset its LCD at boot). A try that matches neither key set is inconclusive and
-  /// is repeated (_identify_ili9342); the caller falls back to the C when it stays so.
-  /// When the E keys do not match, the C is confirmed by its own datasheet-defined identity:
-  /// with its EXTC key sent, D3h (Read ID4) gives 93h 42h. That step is skipped on an E so
-  /// that no C command reaches an E. The C datasheet does not define what a C returns for the
-  /// E keys, so the "not E" side rests on measurement; the ID4 check exists to make the C
-  /// side positive. D9h is returned to 00h afterwards: while it still holds an index the panel
-  /// misreads the parameters of the following writes.
-  /// The reads go through a panel object (not yet initialized) so that the board's CS / D-C
-  /// handling applies; as it is not initialized, each transaction is closed with a NOP, which
-  /// both panels ignore. The caller then creates the panel of the detected type.
+#if !defined (CONFIG_IDF_TARGET) || defined (CONFIG_IDF_TARGET_ESP32) || defined (CONFIG_IDF_TARGET_ESP32S3)
   /// The ILI9342E needs about 1 us after RAMRD before the first pixel is valid. At the 16 MHz
   /// read clock used here the eight dummy clocks are not enough and it returns one stale pixel
   /// (24 bits) first, so that pixel is skipped as well; at 8 MHz and below the eight clocks
@@ -954,81 +748,7 @@ namespace m5gfx
     p->config(cfg);
   }
 
-  enum class ili9342_variant_t : std::uint8_t { unknown, c, e };
-
-  /// One try of the identity keys. Silent, so that the caller can repeat it while the panel
-  /// is not answering (see _identify_ili9342). keys[] receives the raw read-backs for the log.
-  static ili9342_variant_t _probe_ili9342_variant(lgfx::Panel_LCD* p, std::uint32_t keys[4], bool try_c_key = true)
-  {
-    auto write8 = [&](std::uint8_t cmd, std::uint8_t data)
-    {
-      p->startWrite();
-      p->writeCommand(cmd, 1);
-      p->writeData(data, 1);
-      p->endWrite();
-    };
-    // One dummy bit shifts the byte left by one; normalise to the datasheet value.
-    std::uint8_t dummy_bits = p->config().dummy_read_bits;
-    auto read_param = [&](std::uint8_t cmd, std::uint8_t index) -> std::uint32_t
-    {
-      write8(0xD9, 0x10 | index);
-      std::uint32_t v = p->readCommand(cmd, 0, 1) & 0xFF;
-      return (dummy_bits == 1) ? ((v >> 1) & 0x7F) : v;
-    };
-    write8(0xD9, 0x00);   // a leftover index would make the panel misread the parameters below
-                          // (D9h needs EXTC on the E, and a firmware that left an index had it on)
-    write8(0xDD, 0x01);
-    write8(0xCB, 0x1C);
-    keys[0] = read_param(0xDD, 1);
-    keys[1] = read_param(0xCB, 1);
-    write8(0xD9, 0x00);   // the last read left an index behind
-    if (keys[0] == 0x01 && keys[1] == 0x1C) { return ili9342_variant_t::e; }
-    if (!try_c_key) { return ili9342_variant_t::unknown; }   // a known E is only waited for; no C command reaches it
-    // Not an E: confirm the C by its own Read ID4 (D3h = 00h 93h 42h), reachable once its EXTC key is sent.
-    p->startWrite();
-    p->writeCommand(0xC8, 1);
-    p->writeData(0xFF, 1);
-    p->writeData(0x93, 1);
-    p->writeData(0x42, 1);
-    p->endWrite();
-    keys[2] = read_param(0xD3, 2);
-    keys[3] = read_param(0xD3, 3);
-    write8(0xD9, 0x00);
-    // the normalisation keeps 7 bits, so 93h compares as 13h
-    return (keys[2] == (0x93 & 0x7F) && keys[3] == 0x42) ? ili9342_variant_t::c : ili9342_variant_t::unknown;
-  }
-
-  /// Identify the panel, repeating the probe every millisecond for up to poll_ms while neither
-  /// key set answers. A panel that is reloading its registers after a reset (see the Core2 path)
-  /// gives constants for a few milliseconds; a C answers at once.
-  __attribute__ ((unused))
-  static ili9342_variant_t _identify_ili9342(lgfx::Panel_LCD* p, std::uint32_t keys[4], std::uint32_t poll_ms, bool try_c_key = true)
-  {
-    auto v = _probe_ili9342_variant(p, keys, try_c_key);
-    for (std::uint32_t waited = 0; v == ili9342_variant_t::unknown && waited < poll_ms; ++waited)
-    {
-      lgfx::delay(1);
-      v = _probe_ili9342_variant(p, keys, try_c_key);
-    }
-    return v;
-  }
 
-  __attribute__ ((unused))
-  static void _log_ili9342_variant(ili9342_variant_t v, const std::uint32_t keys[4])
-  {
-    switch (v)
-    {
-    case ili9342_variant_t::e:
-      ESP_LOGI(LIBRARY_NAME, "[Autodetect] ILI9342 read-back DDh:%02x CBh:%02x -> ILI9342E", (int)keys[0], (int)keys[1]);
-      break;
-    case ili9342_variant_t::c:
-      ESP_LOGI(LIBRARY_NAME, "[Autodetect] ILI9342 read-back DDh:%02x CBh:%02x ID4:%02x%02x -> ILI9342C", (int)keys[0], (int)keys[1], (int)keys[2], (int)keys[3]);
-      break;
-    default:
-      ESP_LOGW(LIBRARY_NAME, "[Autodetect] ILI9342 read-back DDh:%02x CBh:%02x ID4:%02x%02x -> neither key answered, ILI9342C assumed", (int)keys[0], (int)keys[1], (int)keys[2], (int)keys[3]);
-      break;
-    }
-  }
 #endif
 
 #if !defined (CONFIG_IDF_TARGET) || defined (CONFIG_IDF_TARGET_ESP32)
@@ -1148,11 +868,6 @@ namespace m5gfx
     {
       transaction.buses().opened_i2c(adopted_i2c_port);
     }
-    if ((result.prepared & board_detect::panel_dirty) && !allow_reset)
-    {
-      ESP_LOGD(LIBRARY_NAME,
-               "[Autodetect] panel probe changed registers while reset was disabled");
-    }
     board_detect::m5::display_parts_t parts;
     const auto construct_result = board_detect::m5::setup_detected_board(result, &parts);
     if (construct_result == board_detect::m5::construct_status_t::failed)
@@ -1380,27 +1095,9 @@ namespace m5gfx
 
   board_t M5GFX::autodetect(bool use_reset, board_t board)
   {
-    auto bus_spi = new Bus_SPI();
-    _bus_last.reset(bus_spi);
-
     panel(nullptr);
 
-    auto bus_cfg = bus_spi->config();
-    (void)bus_cfg; // prevent compiler warning.
-    bus_cfg.freq_write = 8000000;
-    bus_cfg.freq_read  = 8000000;
-    bus_cfg.spi_mode = 0;
-    bus_cfg.use_lock = true;
-
-#if !defined (CONFIG_IDF_TARGET) || defined (CONFIG_IDF_TARGET_ESP32)
-
-    bus_cfg.spi_host = SPI3_HOST;
-    bus_cfg.dma_channel = 1;
-
-#elif defined (CONFIG_IDF_TARGET_ESP32S3)
-
-    bus_cfg.spi_host = SPI2_HOST;
-    bus_cfg.dma_channel = SPI_DMA_CH_AUTO;
+#if defined (CONFIG_IDF_TARGET_ESP32S3)
 
     const board_detect::board_detector_t* const* detectors = nullptr;
     switch (m5gfx::get_pkg_ver())
@@ -1523,9 +1220,6 @@ namespace m5gfx
 
 #elif defined (CONFIG_IDF_TARGET_ESP32C5)
 
-    bus_cfg.spi_host = SPI2_HOST;
-    bus_cfg.dma_channel = SPI_DMA_CH_AUTO;
-
     if (board == 0 || board == board_t::board_M5ToughC5)
     {
       // ESP32-C5HF4 (in-package 4MB flash, no PSRAM) boards such as the
diff --git a/src/board_detect/board_detect.hpp b/src/board_detect/board_detect.hpp
index cb750a3..ed4bda8 100644
--- a/src/board_detect/board_detect.hpp
+++ b/src/board_detect/board_detect.hpp
@@ -46,7 +46,6 @@ namespace board_detect
     prepared_power  = 1u << 0,
     prepared_reset  = 1u << 1,
     prepared_sd_spi = 1u << 2,
-    panel_dirty     = 1u << 3,
     // The GPIO reset line has been driven inactive, but a reset pulse may not
     // have been allowed. Keep this distinct from prepared_reset so a later
     // reset-enabled prepare can still pulse the panel reset.
diff --git a/src/board_detect/board_detect.inl b/src/board_detect/board_detect.inl
index 8e974ae..3185bb8 100644
--- a/src/board_detect/board_detect.inl
+++ b/src/board_detect/board_detect.inl
@@ -901,6 +901,7 @@ namespace board_detect
   {
     if (pin_dc_ >= 0) { lgfx::gpio_hi(pin_dc_); }
     if (pin_miso_ == pin_mosi_) { lgfx::pinMode(pin_mosi_, lgfx::pin_mode_t::input); }
+    if (pin_miso_ == pin_dc_) { lgfx::pinMode(pin_dc_, lgfx::pin_mode_t::input); }
     for (std::uint_fast8_t i = 0; i < dummy_bits; ++i) { clock(); }
   }
 
@@ -926,6 +927,7 @@ namespace board_detect
   void soft_spi_t::endRead()
   {
     if (pin_miso_ == pin_mosi_) { lgfx::pinMode(pin_mosi_, lgfx::pin_mode_t::output); }
+    if (pin_miso_ == pin_dc_) { lgfx::pinMode(pin_dc_, lgfx::pin_mode_t::output); }
   }
 
   std::uint32_t soft_spi_read32(probe_ctx_t& ctx, int pin_sclk, int pin_mosi, int pin_miso,
diff --git a/src/board_detect/m5/board_registry.inl b/src/board_detect/m5/board_registry.inl
index 5043d1d..d6a30f3 100644
--- a/src/board_detect/m5/board_registry.inl
+++ b/src/board_detect/m5/board_registry.inl
@@ -62,6 +62,109 @@ namespace m5
              static_cast<unsigned>(result.def->id));
     return construct_status_t::failed;
   }
+  namespace detail
+  {
+    enum class panel_variant_t : std::uint8_t { unknown, c, e };
+
+    void write8(soft_spi_t& bus, int pin_cs, std::uint8_t cmd, std::uint8_t data)
+    {
+      bus.beginTransaction();
+      lgfx::gpio_lo(pin_cs);
+      bus.writeCommand(cmd, 8);
+      bus.writeData(data, 8);
+      // An uninitialised Panel_LCD still has _nop_closing=true. Its endWrite()
+      // emits NOP before raising CS, so reproduce that probe transaction exactly.
+      bus.writeCommand(0x00, 8);
+      bus.wait();
+      lgfx::gpio_hi(pin_cs);
+      bus.endTransaction();
+    }
+
+    std::uint8_t read_parameter(soft_spi_t& bus, int pin_cs, std::uint8_t cmd, std::uint8_t index)
+    {
+      write8(bus, pin_cs, 0xD9, 0x10 | index);
+      bus.beginTransaction();
+      lgfx::gpio_lo(pin_cs);
+      bus.writeCommand(cmd, 8);
+      bus.beginRead(1);
+      const auto value = static_cast<std::uint8_t>(bus.readData(8));
+      lgfx::gpio_hi(pin_cs);
+      bus.endRead();
+      // Panel_LCD::readCommand() raises CS before endWrite(). The latter still
+      // clocks its closing NOP (with CS high) because the panel is uninitialised.
+      bus.writeCommand(0x00, 8);
+      bus.wait();
+      bus.endTransaction();
+      return (value >> 1) & 0x7F;
+    }
+
+    panel_variant_t probe_panel_variant(soft_spi_t& bus, int pin_cs,
+                                        std::uint32_t keys[4], bool try_c_key)
+    {
+      write8(bus, pin_cs, 0xD9, 0x00);
+      write8(bus, pin_cs, 0xDD, 0x01);
+      write8(bus, pin_cs, 0xCB, 0x1C);
+      keys[0] = read_parameter(bus, pin_cs, 0xDD, 1);
+      keys[1] = read_parameter(bus, pin_cs, 0xCB, 1);
+      write8(bus, pin_cs, 0xD9, 0x00);
+      if (keys[0] == 0x01 && keys[1] == 0x1C) { return panel_variant_t::e; }
+      if (!try_c_key) { return panel_variant_t::unknown; }
+
+      bus.beginTransaction();
+      lgfx::gpio_lo(pin_cs);
+      bus.writeCommand(0xC8, 8);
+      bus.writeData(0xFF, 8);
+      bus.writeData(0x93, 8);
+      bus.writeData(0x42, 8);
+      bus.writeCommand(0x00, 8);
+      bus.wait();
+      lgfx::gpio_hi(pin_cs);
+      bus.endTransaction();
+      keys[2] = read_parameter(bus, pin_cs, 0xD3, 2);
+      keys[3] = read_parameter(bus, pin_cs, 0xD3, 3);
+      write8(bus, pin_cs, 0xD9, 0x00);
+      return (keys[2] == (0x93 & 0x7F) && keys[3] == 0x42)
+           ? panel_variant_t::c : panel_variant_t::unknown;
+    }
+
+    panel_variant_t identify_panel_variant(soft_spi_t& bus, int pin_cs,
+                                           std::uint32_t keys[4], std::uint32_t poll_ms,
+                                           bool try_c_key = true)
+    {
+      auto variant = probe_panel_variant(bus, pin_cs, keys, try_c_key);
+      const auto started = lgfx::millis();
+      while (variant == panel_variant_t::unknown && poll_ms)
+      {
+        lgfx::delay(1);
+        variant = probe_panel_variant(bus, pin_cs, keys, try_c_key);
+        if (lgfx::millis() - started >= poll_ms) { break; }
+      }
+      return variant;
+    }
+
+    void log_panel_variant(panel_variant_t variant, const std::uint32_t keys[4])
+    {
+      if (variant == panel_variant_t::e)
+      {
+        ESP_LOGI("board_detect_m5", "ILI9342 read-back DDh:%02x CBh:%02x -> ILI9342E",
+                 static_cast<unsigned>(keys[0]), static_cast<unsigned>(keys[1]));
+      }
+      else if (variant == panel_variant_t::c)
+      {
+        ESP_LOGI("board_detect_m5", "ILI9342 read-back DDh:%02x CBh:%02x ID4:%02x%02x -> ILI9342C",
+                 static_cast<unsigned>(keys[0]), static_cast<unsigned>(keys[1]),
+                 static_cast<unsigned>(keys[2]), static_cast<unsigned>(keys[3]));
+      }
+      else
+      {
+        ESP_LOGW("board_detect_m5", "ILI9342 read-back DDh:%02x CBh:%02x ID4:%02x%02x -> neither key answered, ILI9342C assumed",
+                 static_cast<unsigned>(keys[0]), static_cast<unsigned>(keys[1]),
+                 static_cast<unsigned>(keys[2]), static_cast<unsigned>(keys[3]));
+      }
+    }
+
+  }
+
 }
 }
 }
diff --git a/src/board_detect/m5/esp32_d0wdq6.inl b/src/board_detect/m5/esp32_d0wdq6.inl
index e3a1189..911a6ad 100644
--- a/src/board_detect/m5/esp32_d0wdq6.inl
+++ b/src/board_detect/m5/esp32_d0wdq6.inl
@@ -30,23 +30,17 @@ namespace m5
                                     std::uint32_t* detected_option);
   }
 
-  static constexpr std::size_t max_restore_regs = max_pmic_restore_registers;
-  static const std::uint8_t restore_order192[] = { 0x12, 0x28, 0x92, 0x95, 0x96, 0x94 };
-  static const std::uint8_t restore_order2101[] = { 0x80, 0x82, 0x84, 0x90 };
-  static_assert(sizeof(restore_order192) <= max_restore_regs
-             && sizeof(restore_order2101) <= max_restore_regs,
-                "PMIC restore list exceeds backup capacity");
   static_assert(generated_options::core2::new_pmic == generated_options::tough::reserved,
                 "Core2 new-PMIC and Tough reserved option bits must remain shared");
   static const pmic_variant_t core_pmic_variants[] = {
     pmic_variant(0x34, 0x03, 0x03, ops::list(pmic_ops::power192),
                  reg_bit(0x12, 0x04), reg_bit(0x96, 0x02),
                  ops::list(pmic_ops::reset192), ops::list(pmic_ops::release192),
-                 registers(restore_order192), 0),
+                 { nullptr, 0 }, 0),
     pmic_variant(0x34, 0x03, 0x4A, ops::list(pmic_ops::power2101),
                  reg_bit(0x90, 0x08), reg_bit(0x90, 0x02),
                  ops::list(pmic_ops::reset2101), ops::list(pmic_ops::release2101),
-                 registers(restore_order2101),
+                 { nullptr, 0 },
                  generated_options::core2::new_pmic),
   };
 
@@ -148,226 +142,6 @@ namespace m5
       return true;
     }
 
-    std::uint32_t read_panel_id(soft_spi_t& bus, int pin_cs,
-                                std::uint8_t cmd = panel_id_command,
-                                std::uint8_t dummy_bits = 1)
-    {
-      bus.beginTransaction();
-      startup_detail::pin_level(pin_cs, true);
-      bus.writeCommand(0, 8);
-      bus.wait();
-      lgfx::gpio_lo(pin_cs);
-      bus.writeCommand(cmd, 8);
-      bus.beginRead(dummy_bits);
-      const auto value = bus.readData(32);
-      lgfx::gpio_hi(pin_cs);
-      bus.endTransaction();
-      ESP_LOGD("board_detect_m5", "read cmd:%02x = %08x",
-               static_cast<unsigned>(cmd), static_cast<unsigned>(value));
-      return value;
-    }
-
-    struct register_backup_t
-    {
-      std::uint8_t addr = 0;
-      std::uint8_t reg = 0;
-      std::uint8_t value = 0;
-      std::uint8_t mask = 0;
-    };
-
-    struct register_spec_t
-    {
-      std::uint8_t addr;
-      std::uint8_t reg;
-      std::uint8_t mask;
-    };
-
-    std::uint8_t changed_mask(const power_desc_t& power, ops::op_list_t sequence,
-                              std::uint8_t addr, std::uint8_t reg)
-    {
-      std::uint8_t mask = 0;
-      for (std::size_t i = 0; i < sequence.size; ++i)
-      {
-        ops::decoded_register_write_t write;
-        if (ops::decode_register_write(sequence.data[i], &write)
-         && write.dev < power.device_count
-         && power.devices[write.dev].addr == addr && write.reg == reg)
-        {
-          mask |= write.mask;
-        }
-      }
-      return mask;
-    }
-
-    std::uint8_t changed_mask(const power_desc_t& power, const pmic_variant_t& variant,
-                              std::uint8_t addr, std::uint8_t reg)
-    {
-      return changed_mask(power, variant.power_on, addr, reg)
-           | changed_mask(power, variant.reset_assert, addr, reg)
-           | changed_mask(power, variant.reset_release, addr, reg);
-    }
-
-    bool restore_list_covers(const power_desc_t& power, const pmic_variant_t& variant)
-    {
-      const ops::op_list_t sequences[] = {
-        variant.power_on, variant.reset_assert, variant.reset_release
-      };
-      for (auto sequence : sequences)
-      {
-        for (std::size_t i = 0; i < sequence.size; ++i)
-        {
-          ops::decoded_register_write_t write;
-          if (!ops::decode_register_write(sequence.data[i], &write)) { continue; }
-          bool covered = false;
-          const auto addr = write.dev < power.device_count
-                          ? power.devices[write.dev].addr : 0xFFFF;
-          if (addr == variant.i2c_addr)
-          {
-            for (std::size_t reg = 0; reg < variant.restore_registers.size; ++reg)
-            {
-              if (variant.restore_registers.data[reg] == write.reg)
-              {
-                covered = true;
-                break;
-              }
-            }
-          }
-          if (!covered)
-          {
-            ESP_LOGW("board_detect_m5", "PMIC write is absent from restore list addr=%02x reg=%02x",
-                     static_cast<unsigned>(addr),
-                     static_cast<unsigned>(write.reg));
-            return false;
-          }
-        }
-      }
-      return true;
-    }
-
-    bool save_registers(int port, const register_spec_t* specs,
-                        register_backup_t* saved, std::size_t count,
-                        std::uint32_t i2c_freq)
-    {
-      for (std::size_t i = 0; i < count; ++i)
-      {
-        auto value = lgfx::i2c::readRegister8(port, specs[i].addr, specs[i].reg, i2c_freq);
-        if (!value.has_value()) { return false; }
-        saved[i].addr = specs[i].addr;
-        saved[i].reg = specs[i].reg;
-        saved[i].value = value.value();
-        saved[i].mask = specs[i].mask;
-      }
-      return true;
-    }
-
-    bool restore_registers(int port, const register_backup_t* saved, std::size_t count,
-                           std::uint32_t i2c_freq)
-    {
-      bool restored_all = true;
-      while (count)
-      {
-        --count;
-        bool restored = false;
-        for (int attempt = 0; attempt < 4; ++attempt)
-        {
-          if (lgfx::i2c::writeRegister8(port, saved[count].addr, saved[count].reg,
-                                       saved[count].value & saved[count].mask,
-                                       static_cast<std::uint8_t>(~saved[count].mask),
-                                       i2c_freq).has_value())
-          {
-            restored = true;
-            break;
-          }
-        }
-        if (!restored)
-        {
-          restored_all = false;
-          ESP_LOGW("board_detect_m5", "PMIC register restore failed addr=%02x reg=%02x",
-                   static_cast<unsigned>(saved[count].addr),
-                   static_cast<unsigned>(saved[count].reg));
-        }
-      }
-      return restored_all;
-    }
-
-    enum class panel_variant_t : std::uint8_t { unknown, c, e };
-
-    void write8(soft_spi_t& bus, int pin_cs, std::uint8_t cmd, std::uint8_t data)
-    {
-      bus.beginTransaction();
-      lgfx::gpio_lo(pin_cs);
-      bus.writeCommand(cmd, 8);
-      bus.writeData(data, 8);
-      // An uninitialised Panel_LCD still has _nop_closing=true. Its endWrite()
-      // emits NOP before raising CS, so reproduce that probe transaction exactly.
-      bus.writeCommand(0x00, 8);
-      bus.wait();
-      lgfx::gpio_hi(pin_cs);
-      bus.endTransaction();
-    }
-
-    std::uint8_t read_parameter(soft_spi_t& bus, int pin_cs, std::uint8_t cmd, std::uint8_t index)
-    {
-      write8(bus, pin_cs, 0xD9, 0x10 | index);
-      bus.beginTransaction();
-      lgfx::gpio_lo(pin_cs);
-      bus.writeCommand(cmd, 8);
-      bus.beginRead(1);
-      const auto value = static_cast<std::uint8_t>(bus.readData(8));
-      lgfx::gpio_hi(pin_cs);
-      bus.endRead();
-      // Panel_LCD::readCommand() raises CS before endWrite(). The latter still
-      // clocks its closing NOP (with CS high) because the panel is uninitialised.
-      bus.writeCommand(0x00, 8);
-      bus.wait();
-      bus.endTransaction();
-      return (value >> 1) & 0x7F;
-    }
-
-    panel_variant_t probe_panel_variant(soft_spi_t& bus, int pin_cs,
-                                        std::uint32_t keys[4], bool try_c_key)
-    {
-      write8(bus, pin_cs, 0xD9, 0x00);
-      write8(bus, pin_cs, 0xDD, 0x01);
-      write8(bus, pin_cs, 0xCB, 0x1C);
-      keys[0] = read_parameter(bus, pin_cs, 0xDD, 1);
-      keys[1] = read_parameter(bus, pin_cs, 0xCB, 1);
-      write8(bus, pin_cs, 0xD9, 0x00);
-      if (keys[0] == 0x01 && keys[1] == 0x1C) { return panel_variant_t::e; }
-      if (!try_c_key) { return panel_variant_t::unknown; }
-
-      bus.beginTransaction();
-      lgfx::gpio_lo(pin_cs);
-      bus.writeCommand(0xC8, 8);
-      bus.writeData(0xFF, 8);
-      bus.writeData(0x93, 8);
-      bus.writeData(0x42, 8);
-      bus.writeCommand(0x00, 8);
-      bus.wait();
-      lgfx::gpio_hi(pin_cs);
-      bus.endTransaction();
-      keys[2] = read_parameter(bus, pin_cs, 0xD3, 2);
-      keys[3] = read_parameter(bus, pin_cs, 0xD3, 3);
-      write8(bus, pin_cs, 0xD9, 0x00);
-      return (keys[2] == (0x93 & 0x7F) && keys[3] == 0x42)
-           ? panel_variant_t::c : panel_variant_t::unknown;
-    }
-
-    panel_variant_t identify_panel_variant(soft_spi_t& bus, int pin_cs,
-                                           std::uint32_t keys[4], std::uint32_t poll_ms,
-                                           bool try_c_key = true)
-    {
-      auto variant = probe_panel_variant(bus, pin_cs, keys, try_c_key);
-      const auto started = lgfx::millis();
-      while (variant == panel_variant_t::unknown && poll_ms)
-      {
-        lgfx::delay(1);
-        variant = probe_panel_variant(bus, pin_cs, keys, try_c_key);
-        if (lgfx::millis() - started >= poll_ms) { break; }
-      }
-      return variant;
-    }
-
     bool stack_reset_and_sample_ips(const board_desc_t& desc, const prepare_ctx_t& ctx,
                                     std::uint32_t* detected_option)
     {
@@ -409,6 +183,67 @@ namespace m5
     { &desc_atompsram, construct_atompsram, "", nullptr },
   };
 
+  namespace detail
+  {
+    bool refine_core_family(board_result_t& result, const prepare_ctx_t& ctx)
+    {
+      const auto& display = desc_core2.display;
+      const std::int8_t signals[] = {
+        display.dc, display.sclk, display.mosi, display.miso
+      };
+      startup_detail::pin_level(display.cs, true);
+      startup_detail::pin_level(desc_core2.sd.sd_cs, true);
+      soft_spi_t bus(display.sclk, display.mosi, display.mosi, display.dc);
+      bus.init();
+      std::uint32_t keys[4] = {};
+      // Without reset, leave the same 120 ms window for a waking panel.
+      auto variant = identify_panel_variant(bus, display.cs, keys,
+                                            ctx.allow_reset ? 1 : 120);
+      if (ctx.allow_reset)
+      {
+        startup_detail::i2c_scope_t i2c(*ctx.transaction, ctx.i2c_port_probe,
+                                         desc_core2.internal_i2c);
+        if (!i2c.opened || !prepare_reset(desc_core2, result, ctx, i2c.port))
+        {
+          ctx.transaction->restore_start(signals);
+          return false;
+        }
+        std::uint32_t after_keys[4] = {};
+        const auto after = identify_panel_variant(bus, display.cs, after_keys,
+                                                  120, variant != panel_variant_t::e);
+        if (after != panel_variant_t::unknown)
+        {
+          variant = after;
+          for (int i = 0; i < 4; ++i) { keys[i] = after_keys[i]; }
+        }
+      }
+      startup_detail::i2c_scope_t i2c(*ctx.transaction, ctx.i2c_port_probe,
+                                       desc_core2.internal_i2c);
+      if (!i2c.opened)
+      {
+        ctx.transaction->restore_start(signals);
+        return false;
+      }
+      const bool tough = lgfx::i2c::readRegister8(
+        i2c.port, tough_touch_address, touch_probe_register,
+        tough_touch_i2c_frequency).has_value();
+      // AXP192 is shared with Station. If neither LCD key answers and Tough's
+      // touch is absent, a transient Station probe miss must not become Core2.
+      if (!tough && variant == panel_variant_t::unknown
+       && !(result.option & generated_options::core2::new_pmic))
+      {
+        ctx.transaction->restore_start(signals);
+        return false;
+      }
+      log_panel_variant(variant, keys);
+      result.assign(tough ? &desc_tough : &desc_core2);
+      if (variant == panel_variant_t::e) { result.option |= generated_options::core2::lcd_e; }
+      if (tough) { result.option &= ~generated_options::core2::new_pmic; }
+      ctx.transaction->restore_start(signals);
+      return true;
+    }
+  }
+
   class axp_family_detector_t final : public board_detector_t
   {
   public:
@@ -492,135 +327,13 @@ namespace m5
         return true;
       };
 
-      const bool core_first =
-#if defined (M5GFX_AUTODETECT_TEST_STATION_TO_CORE2)
-        false;
-#else
-        ctx.hint == id(lgfx::board_M5StackCore2)
-     || ctx.hint == id(lgfx::board_M5Tough);
-#endif
-      if (!core_first && try_station()) { return true; }
-
-      // Before the touch controller distinguishes Tough from Core2, a caller's
-      // explicit Tough hint selects the Tough descriptor for PMIC bookkeeping.
-      const auto& core_desc = ctx.hint == id(lgfx::board_M5Tough) ? desc_tough : desc_core2;
-
-      // The variant owns the legacy read order; masks remain derived from all
-      // of its power/reset writes so the restore description cannot drift.
-      const auto& restore_regs = pmic->restore_registers;
-      if (restore_regs.size > max_restore_regs
-       || !detail::restore_list_covers(core_desc.power, *pmic))
-      {
-        return false;
-      }
-      detail::register_spec_t regs[max_restore_regs];
-      for (std::size_t i = 0; i < restore_regs.size; ++i)
-      {
-        regs[i].addr = pmic->i2c_addr;
-        regs[i].reg = restore_regs.data[i];
-        regs[i].mask = detail::changed_mask(core_desc.power, *pmic,
-                                            pmic->i2c_addr, restore_regs.data[i]);
-      }
-      detail::register_backup_t saved[max_restore_regs];
-      if (!detail::save_registers(i2c.port, regs, saved, restore_regs.size,
-                                  desc_core2.power.i2c_freq))
-      {
-        return core_first && try_station();
-      }
-
+      // Station must be excluded before accepting the shared AXP signature.
+      if (try_station()) { return true; }
       *result = {};
       result->assign(&desc_core2);
       result->option = pmic->detected_option;
       result->prepared = preprepared;
-      const std::int8_t signals[] = {
-        desc_core2.display.dc, desc_core2.display.sclk,
-        desc_core2.display.mosi, desc_core2.display.miso
-      };
-      auto restore_and_fail = [&]() -> bool
-      {
-        ctx.transaction->restore_start(signals);
-        detail::restore_registers(i2c.port, saved, restore_regs.size,
-                                  desc_core2.power.i2c_freq);
-        return core_first && try_station();
-      };
-      if (!startup_detail::prepare_power(desc_core2, *result, i2c.port)) { return restore_and_fail(); }
-      startup_detail::pin_level(desc_core2.sd.sd_cs, true);
-      if (!startup_detail::prepare_sd_spi(desc_core2, *result, prepare_ctx)) { return restore_and_fail(); }
-      startup_detail::hold_chip_selects(desc_core2);
-
-      const auto& display = desc_core2.display;
-      soft_spi_t bus(display.sclk, display.mosi, display.mosi, display.dc);
-      bus.init();
-      auto panel_id = detail::read_panel_id(bus, display.cs);
-      bool reset_before_identify = false;
-      if ((panel_id & detail::panel_id_mask) != detail::common_panel_id && ctx.allow_reset)
-      {
-        // Some valid panels do not answer until reset. Retry here because a
-        // later detection attempt must not relax the caller's reset policy.
-        auto forced_prepare_ctx = prepare_ctx;
-        forced_prepare_ctx.allow_reset = true;
-        if (!prepare_reset(desc_core2, *result, forced_prepare_ctx, i2c.port))
-        {
-          return restore_and_fail();
-        }
-        reset_before_identify = true;
-        panel_id = detail::read_panel_id(bus, display.cs);
-      }
-      if ((panel_id & detail::panel_id_mask) != detail::common_panel_id)
-      {
-        return restore_and_fail();
-      }
-
-      std::uint32_t keys[4] = {};
-      auto variant = detail::identify_panel_variant(
-        bus, display.cs, keys, reset_before_identify ? 120 : 1);
-      result->prepared |= panel_dirty;
-      if (ctx.allow_reset && !reset_before_identify)
-      {
-        auto forced_prepare_ctx = prepare_ctx;
-        forced_prepare_ctx.allow_reset = true;
-        if (!prepare_reset(desc_core2, *result, forced_prepare_ctx, i2c.port))
-        {
-          return restore_and_fail();
-        }
-        std::uint32_t after_keys[4] = {};
-        const auto after = detail::identify_panel_variant(
-          bus, display.cs, after_keys, 120, variant != detail::panel_variant_t::e);
-        if (after != detail::panel_variant_t::unknown)
-        {
-          variant = after;
-          for (int i = 0; i < 4; ++i) { keys[i] = after_keys[i]; }
-        }
-      }
-      if (variant == detail::panel_variant_t::e)
-      {
-        ESP_LOGI("board_detect_m5", "ILI9342 read-back DDh:%02x CBh:%02x -> ILI9342E",
-                 static_cast<unsigned>(keys[0]), static_cast<unsigned>(keys[1]));
-      }
-      else if (variant == detail::panel_variant_t::c)
-      {
-        ESP_LOGI("board_detect_m5", "ILI9342 read-back DDh:%02x CBh:%02x ID4:%02x%02x -> ILI9342C",
-                 static_cast<unsigned>(keys[0]), static_cast<unsigned>(keys[1]),
-                 static_cast<unsigned>(keys[2]), static_cast<unsigned>(keys[3]));
-      }
-      else
-      {
-        ESP_LOGW("board_detect_m5", "ILI9342 read-back DDh:%02x CBh:%02x ID4:%02x%02x -> neither key answered, ILI9342C assumed",
-                 static_cast<unsigned>(keys[0]), static_cast<unsigned>(keys[1]),
-                 static_cast<unsigned>(keys[2]), static_cast<unsigned>(keys[3]));
-      }
-
-      const bool tough = lgfx::i2c::readRegister8(
-        i2c.port, detail::tough_touch_address, detail::touch_probe_register,
-        detail::tough_touch_i2c_frequency).has_value();
-      result->assign(tough ? &desc_tough : &desc_core2);
-      result->option = pmic->detected_option
-                     | (variant == detail::panel_variant_t::e
-                        ? (tough ? generated_options::tough::lcd_e
-                                 : generated_options::core2::lcd_e)
-                        : 0);
-      if (tough) { result->option &= ~generated_options::core2::new_pmic; }
-      ctx.transaction->restore_start(signals);
+      result->refine = detail::refine_core_family;
       return true;
     }
 
diff --git a/src/board_detect/m5/esp32c5/toughc5_setup.inl b/src/board_detect/m5/esp32c5/toughc5_setup.inl
index b8e0f24..1ac6248 100644
--- a/src/board_detect/m5/esp32c5/toughc5_setup.inl
+++ b/src/board_detect/m5/esp32c5/toughc5_setup.inl
@@ -11,8 +11,6 @@ namespace m5
                  wiring::toughc5::display_miso, wiring::toughc5::display_dc)
       .with_three_wire(specs::toughc5::bus_three_wire)
       .with_dma_channel(SPI_DMA_CH_AUTO);
-  static constexpr spi_bus_desc_t bus_toughc5_panel_id =
-    bus_toughc5.with_freq(8000000, 8000000);
   static constexpr panel_desc_t panel_toughc5 =
     panel().with_size(specs::toughc5::panel_ili9342c::width,
                       specs::toughc5::panel_ili9342c::height)
@@ -31,27 +29,7 @@ namespace m5
   construct_status_t construct_toughc5(const board_result_t&, display_parts_t* parts)
   {
     display_parts_owner_t out;
-    out.bus.reset(make_spi_bus(bus_toughc5_panel_id));
-    auto spi = static_cast<lgfx::Bus_SPI*>(out.bus.get());
-    if (!spi->init()) { return construct_status_t::failed; }
-    auto panel_id = _read_panel_id(spi, wiring::toughc5::display_cs);
-    if ((panel_id & specs::toughc5::probe_ili9342c::mask)
-        != specs::toughc5::probe_ili9342c::values[0])
-    {
-      lgfx::delay(2);
-      panel_id = _read_panel_id(spi, wiring::toughc5::display_cs);
-      if ((panel_id & specs::toughc5::probe_ili9342c::mask)
-          != specs::toughc5::probe_ili9342c::values[0])
-      {
-        ESP_LOGW(LIBRARY_NAME, "[Autodetect] ToughC5 panel ID mismatch: 0x%08x",
-                 static_cast<unsigned>(panel_id));
-      }
-    }
-    spi->release();
-    auto cfg = spi->config();
-    cfg.freq_write = bus_toughc5.freq_write;
-    cfg.freq_read = bus_toughc5.freq_read;
-    spi->config(cfg);
+    out.bus.reset(make_spi_bus(bus_toughc5));
     out.panel.reset(make_panel<lgfx::Panel_ILI9342>(panel_toughc5, out.bus.get()));
     out.light.reset(make_default_part<Light_M5ToughC5>(
       toughc5_detail::i2c_port, pmic_ops::ioe1_i2c_addr, toughc5_detail::i2c_freq));
diff --git a/src/board_detect/m5/esp32c6/c6_display_setup.inl b/src/board_detect/m5/esp32c6/c6_display_setup.inl
index b471c03..7996bed 100644
--- a/src/board_detect/m5/esp32c6/c6_display_setup.inl
+++ b/src/board_detect/m5/esp32c6/c6_display_setup.inl
@@ -22,8 +22,6 @@ static constexpr spi_bus_desc_t bus_nesson1 =
                desc_nesson1.display.miso, desc_nesson1.display.dc)
     .with_three_wire(specs::nesson1::bus_three_wire)
     .with_dma_channel(SPI_DMA_CH_AUTO);
-static constexpr spi_bus_desc_t bus_nesson1_panel_id =
-  bus_nesson1.with_freq(8000000, 8000000);
 static constexpr panel_desc_t panel_nesson1 =
   panel().with_size(specs::nesson1::panel_st7789v2::width,
                     specs::nesson1::panel_st7789v2::height)
@@ -56,22 +54,7 @@ construct_status_t construct_unitc6l(const board_result_t&, display_parts_t* par
 construct_status_t construct_nesson1(const board_result_t&, display_parts_t* parts)
 {
   display_parts_owner_t out;
-  out.bus.reset(make_spi_bus(bus_nesson1_panel_id));
-  auto spi = static_cast<lgfx::Bus_SPI*>(out.bus.get());
-  if (!spi->init()) { return construct_status_t::failed; }
-  const auto panel_id = _read_panel_id(spi, desc_nesson1.display.cs,
-                                       specs::nesson1::probe_st7789v2::cmd, 1);
-  if ((panel_id & specs::nesson1::probe_st7789v2::mask)
-      != specs::nesson1::probe_st7789v2::values[0])
-  {
-    ESP_LOGW(LIBRARY_NAME, "[Autodetect] ArduinoNessoN1 panel ID mismatch: 0x%08x",
-             static_cast<unsigned>(panel_id));
-  }
-  spi->release();
-  auto cfg = spi->config();
-  cfg.freq_write = bus_nesson1.freq_write;
-  cfg.freq_read = bus_nesson1.freq_read;
-  spi->config(cfg);
+  out.bus.reset(make_spi_bus(bus_nesson1));
   out.panel.reset(make_panel<lgfx::Panel_ST7789>(panel_nesson1, out.bus.get()));
   out.touch.reset(make_i2c_touch<lgfx::Touch_FT5x06>(touch_nesson1));
   out.light.reset(new Light_ArduinoNessoN1(
diff --git a/src/board_detect/m5/esp32p4/tab5_setup.inl b/src/board_detect/m5/esp32p4/tab5_setup.inl
index 01cd477..cb798e9 100644
--- a/src/board_detect/m5/esp32p4/tab5_setup.inl
+++ b/src/board_detect/m5/esp32p4/tab5_setup.inl
@@ -131,31 +131,28 @@ namespace m5
     if (!bus_dsi->init()) { return construct_status_t::no_display; }
 
     bool hit_ili9881 = false;
-    lgfx::delay(80);
-    for (int i = 0; !hit_st7121 && !hit_st7123 && !hit_ili9881 && i < 3; ++i)
+    if (!read_st_touch_fw && !found_gt911)
     {
-      std::uint8_t id[3] = {};
-      bus_dsi->readParams(0xF4, id, 2);
-      ESP_LOGD(LIBRARY_NAME, "ST ID %02x %02x", id[0], id[1]);
-      if (id[0] == 0x71 && id[1] == 0x23)
-      {
-        ESP_LOGI(LIBRARY_NAME, "M5Tab5 ST DSI ID matched 71 23");
-      }
-      static constexpr std::uint8_t params_page1[] = { 0x98, 0x81, 0x01 };
-      bus_dsi->writeParams(0xFF, params_page1, 3);
-      bus_dsi->readParams(0x00, &id[0], 1);
-      bus_dsi->readParams(0x01, &id[1], 1);
-      bus_dsi->readParams(0x02, &id[2], 1);
-      ESP_LOGD(LIBRARY_NAME, "ILI ID %02x %02x %02x", id[0], id[1], id[2]);
-      if (id[0] == 0x98 && id[1] == 0x81)
+      // A temporarily silent touch must not hide an answering ILI9881C.
+      lgfx::delay(80);
+      for (int i = 0; i < 3 && !hit_ili9881; ++i)
       {
-        static constexpr std::uint8_t params_page0[] = { 0x98, 0x81, 0x00 };
-        bus_dsi->writeParams(0xFF, params_page0, 3);
-        hit_ili9881 = true;
+        std::uint8_t id[3] = {};
+        static constexpr std::uint8_t params_page1[] = { 0x98, 0x81, 0x01 };
+        bus_dsi->writeParams(0xFF, params_page1, 3);
+        bus_dsi->readParams(0x00, &id[0], 1);
+        bus_dsi->readParams(0x01, &id[1], 1);
+        bus_dsi->readParams(0x02, &id[2], 1);
+        ESP_LOGD(LIBRARY_NAME, "ILI ID %02x %02x %02x", id[0], id[1], id[2]);
+        if (id[0] == 0x98 && id[1] == 0x81)
+        {
+          static constexpr std::uint8_t params_page0[] = { 0x98, 0x81, 0x00 };
+          bus_dsi->writeParams(0xFF, params_page0, 3);
+          hit_ili9881 = true;
+        }
       }
     }
-
-    if (hit_ili9881)
+    if (found_gt911 || hit_ili9881)
     {
       out.touch.reset(make_i2c_touch<lgfx::Touch_GT911>(touch_tab5));
       out.panel.reset(make_dsi_panel<lgfx::Panel_ILI9881C>(panel_tab5_ili9881c, bus_dsi));
diff --git a/src/board_detect/m5/esp32s3/cores3.inl b/src/board_detect/m5/esp32s3/cores3.inl
index 731574f..e470378 100644
--- a/src/board_detect/m5/esp32s3/cores3.inl
+++ b/src/board_detect/m5/esp32s3/cores3.inl
@@ -81,6 +81,37 @@
           && camera == specs::cores3::i2c_camera::id_value;
     }
 
+    bool refine_panel(board_result_t& result, const prepare_ctx_t& ctx)
+    {
+      const auto& display = desc_cores3.display;
+      probe_ctx_t probe;
+      static_cast<prepare_ctx_t&>(probe) = ctx;
+      // The LCD bus is 3-wire: read data returns on MOSI, not on the D/C pin.
+      const auto panel_id = soft_spi_read32(
+        probe, display.sclk, display.mosi, display.mosi, display.dc, display.cs,
+        0x04, 1, 1, true);
+      if ((panel_id & specs::cores3::probe_ili9342c::mask)
+          != specs::cores3::probe_ili9342c::values[0])
+      {
+        ESP_LOGW("M5GFX", "[Autodetect] CoreS3 panel ID mismatch: 0x%08x",
+                 static_cast<unsigned>(panel_id));
+      }
+      soft_spi_t bus(display.sclk, display.mosi, display.mosi, display.dc);
+      bus.init();
+      std::uint32_t keys[4] = {};
+      const auto variant = detail::identify_panel_variant(bus, display.cs, keys, 1);
+      detail::log_panel_variant(variant, keys);
+      if (variant == detail::panel_variant_t::e)
+      {
+        result.option |= generated_options::cores3::lcd_e;
+      }
+      const std::int8_t signals[] = {
+        display.dc, display.sclk, display.mosi, display.miso
+      };
+      ctx.transaction->restore_start(signals);
+      return true;
+    }
+
     bool refine(board_result_t& result, const prepare_ctx_t& ctx)
     {
       const bool capacitance_said_se = result.desc == &desc_cores3se;
@@ -106,7 +137,7 @@
           if (capacitance_said_se || release_was_unavailable)
           {
             if (release_was_unavailable) { result.assign(&desc_cores3se); }
-            return true;
+            return refine_panel(result, ctx);
           }
           ESP_LOGW("M5GFX", "[Autodetect] CoreS3 capacitance indicated camera family, but camera ID was unavailable");
         }
@@ -127,7 +158,7 @@
 #endif
       result.assign(has_ioe && firmware >= specs::stackchan::i2c_stackchan_ioe::firmware_min
                   ? &desc_stackchan : &desc_cores3);
-      return true;
+      return refine_panel(result, ctx);
     }
   }
 
diff --git a/src/board_detect/m5/esp32s3/cores3_setup.inl b/src/board_detect/m5/esp32s3/cores3_setup.inl
index 349c21c..3b211f7 100644
--- a/src/board_detect/m5/esp32s3/cores3_setup.inl
+++ b/src/board_detect/m5/esp32s3/cores3_setup.inl
@@ -15,40 +15,16 @@ namespace m5
                  wiring::cores3::display_miso, wiring::cores3::display_dc)
       .with_three_wire(specs::cores3::bus_three_wire)
       .with_dma_channel(SPI_DMA_CH_AUTO);
-  static constexpr std::uint32_t cores3_legacy_panel_id_freq = 8000000;
-  static constexpr spi_bus_desc_t bus_cores3_panel_id =
-    bus_cores3.with_freq(cores3_legacy_panel_id_freq, cores3_legacy_panel_id_freq);
   static constexpr panel_desc_t panel_cores3 = panel();
 
-  construct_status_t construct_cores3(const board_result_t&, display_parts_t* parts)
+  construct_status_t construct_cores3(const board_result_t& result, display_parts_t* parts)
   {
 #if defined(M5GFX_AUTODETECT_TEST_FAIL_CORES3_SETUP)
     return construct_status_t::failed;
 #else
     display_parts_owner_t out;
-    out.bus.reset(make_spi_bus(bus_cores3_panel_id));
-    auto spi = static_cast<lgfx::Bus_SPI*>(out.bus.get());
-    if (!spi->init()) { return construct_status_t::failed; }
-    const auto panel_id = _read_panel_id(spi, wiring::cores3::display_cs);
-    if ((panel_id & specs::cores3::probe_ili9342c::mask)
-        != specs::cores3::probe_ili9342c::values[0])
-    {
-      ESP_LOGW(LIBRARY_NAME, "[Autodetect] CoreS3 panel ID mismatch: 0x%08x",
-               static_cast<unsigned>(panel_id));
-    }
-    // The legacy path read RDDID at the S3 default 8/8 MHz, then switched to
-    // the panel's normal 40/16 MHz before the C/E register probe.
-    auto bus_cfg = spi->config();
-    bus_cfg.freq_write = bus_cores3.freq_write;
-    bus_cfg.freq_read = bus_cores3.freq_read;
-    spi->config(bus_cfg);
-
-    std::uint32_t keys[4] = {};
-    Panel_M5StackCoreS3 panel_probe;
-    panel_probe.bus(spi);
-    const auto variant = _identify_ili9342(&panel_probe, keys, 1);
-    _log_ili9342_variant(variant, keys);
-    if (variant == ili9342_variant_t::e)
+    out.bus.reset(make_spi_bus(bus_cores3));
+    if (result.option & generated_options::cores3::lcd_e)
     {
       auto target = make_panel<Panel_M5StackCoreS3E>(panel_cores3, out.bus.get());
       _set_ili9342e_read(static_cast<lgfx::Panel_ILI9342*>(target), bus_cores3.freq_read);
diff --git a/src/board_detect/m5/generated/esp32s3_wiring.hpp b/src/board_detect/m5/generated/esp32s3_wiring.hpp
index 412ddfb..e3806ae 100644
--- a/src/board_detect/m5/generated/esp32s3_wiring.hpp
+++ b/src/board_detect/m5/generated/esp32s3_wiring.hpp
@@ -382,15 +382,20 @@ namespace generated_options {
 namespace cores3 {
   constexpr std::uint32_t vbus_5v = 1u << 0;
   constexpr std::uint32_t internal_camera_confirmed = 1u << 1;
-  static const char* const names[] = { "vbus_5v", "internal_camera_confirmed" };
+  constexpr std::uint32_t lcd_e = 1u << 2;
+  static const char* const names[] = { "vbus_5v", "internal_camera_confirmed", "lcd_e" };
 } // namespace cores3
 namespace cores3se {
   constexpr std::uint32_t vbus_5v = 1u << 0;
-  static const char* const names[] = { "vbus_5v" };
+  constexpr std::uint32_t reserved = 1u << 1;
+  constexpr std::uint32_t lcd_e = 1u << 2;
+  static const char* const names[] = { "vbus_5v", "reserved", "lcd_e" };
 } // namespace cores3se
 namespace stackchan {
   constexpr std::uint32_t vbus_5v = 1u << 0;
-  static const char* const names[] = { "vbus_5v" };
+  constexpr std::uint32_t reserved = 1u << 1;
+  constexpr std::uint32_t lcd_e = 1u << 2;
+  static const char* const names[] = { "vbus_5v", "reserved", "lcd_e" };
 } // namespace stackchan
 namespace atoms3 {
   constexpr std::uint32_t gc9107 = 1u << 0;