CHIP_FEATURE_EMB_PSRAM not set on ESP32-PICO-V3-02 (IDFGH-9938)

[mmrein]

Answers checklist.

• I have read the documentation ESP-IDF Programming Guide and the issue is not addressed there.
• I have updated my IDF branch (master or release) to the latest version and checked that the issue is present there.
• I have searched the issue tracker for a similar issue and not found a similar issue.

General issue report

Quite simply, I would expect the esp_chip_info() to return CHIP_FEATURE_EMB_PSRAM bit set for ESP32-PICO-V3-02 (EFUSE_RD_CHIP_VER_PKG_ESP32PICOV302) as it has 2MB PSRAM included in same package. But this bit is only set for EFUSE_RD_CHIP_VER_PKG_ESP32D0WDR2V3 as we can see here:

esp-idf/components/esp_hw_support/port/esp32/chip_info.c

Lines 31 to 40 in df9310a

	uint32_t package = efuse_ll_get_chip_ver_pkg();
	if (package == EFUSE_RD_CHIP_VER_PKG_ESP32D2WDQ5 ||
	package == EFUSE_RD_CHIP_VER_PKG_ESP32PICOD2 ||
	package == EFUSE_RD_CHIP_VER_PKG_ESP32PICOD4 ||
	package == EFUSE_RD_CHIP_VER_PKG_ESP32PICOV302) {
	out_info->features |= CHIP_FEATURE_EMB_FLASH;
	}
	if(package == EFUSE_RD_CHIP_VER_PKG_ESP32D0WDR2V3) {
	out_info->features |= CHIP_FEATURE_EMB_PSRAM;
	}

In case the Embedded PSRAM feature bit has different meaning then it would be good to clarify that in documentation.

Edit:

The esptool (IDF v4.4.4) does report Embedded PSRAM correctly, so it really seems like the issue in esp_chip_info():

esptool.py v3.3.2
Serial port /dev/ttyUSB1
Connecting....
Chip is ESP32-PICO-V3-02 (revision 3)
Features: WiFi, BT, Dual Core, 240MHz, Embedded Flash, Embedded PSRAM, VRef calibration in efuse, Coding Scheme None
Crystal is 40MHz

in which case I suppose correct if statement would be:

    if(package == EFUSE_RD_CHIP_VER_PKG_ESP32D0WDR2V3 ||
       package == EFUSE_RD_CHIP_VER_PKG_ESP32PICOV302) {
        out_info->features |= CHIP_FEATURE_EMB_PSRAM;
    }

[ESP-Marius]

@mmrein you are right, seems like we might have missed adding it to the list.

We'll fix it, thanks!