You cannot fix this with a kernel tweak. You must flash the ADSP firmware from 14.0.8 or newer, which includes a patch named "Audio_PM_qos_restore" in the Hexagon linker script. 5. Extracting and Inspecting the Firmware Stop relying on TWRP flashable ZIPs. Do it manually.
Here is the technical nuance that burned many early adopters: The Xiaomi 12’s PBL (Primary Bootloader) burns an anti-rollback fuse for the partition. If you flash firmware from an older build (e.g., rolling back from Android 14 firmware to Android 13 firmware), the tz version number decreases. The PBL detects this and hard bricks the device—no Fastboot, no EDL without an authorized Mi account. Firmware XIAOMI 12
Do you have a Cupid that died after a firmware flash? Drop your EDL log errors in the comments. You cannot fix this with a kernel tweak
# Unpack the official fastboot ROM fastboot update cupid_images_V14.0.8.0.TLCEUXM.zip unzip firmware-update.zip strings xbl.elf | grep -i "cupid" Extracting and Inspecting the Firmware Stop relying on
Every custom ROM requires you to be on the "latest firmware" from HyperOS. Why? Because the vendor.img from Xiaomi contains shim libraries that talk to the tz and hyp firmware. If the shim expects a syscall in the TrustZone applet that only exists in firmware version 14.0.9, the camera halts.
In the Xiaomi ecosystem, "Firmware" is a misused term. To a casual user, it’s a ZIP file they flash via TWRP. To a developer, it’s the bridge between Linux (Android) and the ARM Cortex cores. For the Xiaomi 12 (codenamed Cupid ), the firmware story is particularly volatile due to Qualcomm’s aggressive scheduling and Xiaomi’s regional segmentation.