ESP32-S3 with Octal SPI RAM - Freezes During Boot

[Piziwate]

Describe the bug
When I compile the hello_world example with PSRAM enabled in octal mode, the startup process freezes during initialization. This issue is reproducible on the esp32s3_devkitc/esp32s3/procpu board. Module used: ESP32-S3-DevKitC-1-N32R8V.

The freeze occurs within the HAL at the file modules\hal\espressif\components\esp_psram\esp32s3\esp_psram_impl_octal.c. Specifically, it happens during a call to the method esp_opiflash_set_required_regs(), where the s_chip_func function is NULL and the s_chip_id variable is set to 0.

I don't quite understand the connection between flash initialization and SPI RAM in this case.

To Reproduce

1. west build -b esp32s3_devkitc/esp32s3/procpu ./samples/hello_world/ --pristine -DCONFIG_ESP_SPIRAM=y -DCONFIG_SPIRAM_TYPE_ESPPSRAM64=y -DCONFIG_SPIRAM_MODE_OCT=y -DCONFIG_SPIRAM_SPEED_80M=y -DCONFIG_ESPTOOLPY_FLASHMODE_OPI=y
2. west flash
3. Boot process hangs after outputing (276) MSPI Timing: PSRAM timing tuning index: 5

Expected behavior
The system should boot and display the message:
Hello World! esp32s3_devkitc/esp32s3/procpu

Impact
The good news is that you have a work-around by commenting out the line ((*s_chip_func)->regs_set(s_chip_id)) in the HAL.
But it would be ideal to optimize this case to prevent issues for other users.

Logs and console output
Full boot log : bootlog.txt

Environment (please complete the following information):

• OS: Windows 11
• Zephyr SDK : zephyr-sdk-0.16.8 & zephyr-sdk-0.17.0
• Commit SHA or Version used : main branch

[rftafas]

Can you also paste the boot log info? [edit] saw the link. no need to.

[sylvioalves]

Fixed, will submit it soon.

[sylvioalves]

@Piziwate @tyalie Would you be able to check #83817 ?

[Piziwate]

@sylvioalves I just tested it, and I’m pleased to confirm that everything is in order on my end!

[Piziwate]

@sylvioalves However, I am still encountering a minor issue with the flash in octal mode. When I compile the following example:
west build -b esp32s3_devkitc/esp32s3/procpu samples/subsys/fs/littlefs/ --pristine -DCONFIG_ESP_SPIRAM=y -DCONFIG_SPIRAM_TYPE_ESPPSRAM64=y -DCONFIG_SPIRAM_MODE_OCT=y -DCONFIG_SPIRAM_SPEED_80M=y -DCONFIG_ESPTOOLPY_FLASHMODE_OPI=y
The SPI RAM functions properly and is correctly tested, but it is not possible to access the flash:

W (770) spi_flash: Octal flash chip is using but dio mode is selected, will automatically swich to Octal mode
E (774) spi_flash: failed to get chip size
E: esp_flash_init_default_chip failed 24581
*** Booting Zephyr OS build v4.0.0-3020-g81563c12a25d ***
Sample program to r/w files on littlefs
Area 5 at 0x3c0000 on flash-controller@60002000 for 131072 bytes
I: LittleFS version 2.9, disk version 2.1
I: FS at flash-controller@60002000:0x3c0000 is 32 0x1000-byte blocks with 512 cycle
I: partition sizes: rd 16 ; pr 16 ; ca 64 ; la 32
E: esp_flash_read failed 258
W: can't mount (LFS -5); formatting
E: esp_flash_read failed 258

Should I open an issue for this, or could it be related to something else?

[sylvioalves]

@Piziwate can you, for now, comment the line below before I submit a proper fix to solve this issue?
https://github.com/zephyrproject-rtos/hal_espressif/blob/zephyr/components/spi_flash/esp_flash_spi_init.c#L404

[Piziwate]

Thank you @sylvioalves, the use of the flash is indeed functional with this line commented out!