CONFIG_BOOTLOADER_SPI_CUSTOM_WP_PIN=n fails with ESP32-U4WDH (IDFGH-4353)

[m-bruck]

• Development Kit: none
• Module or chip used: ESP32-U4WDH
• IDF version: v4.2-rc
• Build System: idf.py
• Compiler version: 2020r3
• Operating System: Windows, ESP Command Prompt
• Using an IDE?: No

The description for CONFIG_BOOTLOADER_SPI_CUSTOM_WP_PIN says "If this config item is set to N (default), the correct WP pin will be automatically used for any Espressif chip or module with integrated flash."

However it does not seem to work for U4WDH in combination with QIO. The bootloader fails when checking the partition table.

[projectgus]

Hi @m-bruck,

I'm really sorry noone got back to you about this for such a long time.

You're totally right, the automatic WP pin selection fails in this case and quad flash modes don't work automatically.

As you probably already know, a manual workaround is to enable CONFIG_BOOTLOADER_SPI_CUSTOM_WP_PIN and keep the default choice (7), and it works.

Will have a fix for this ASAP.