The RB5 board has preinstalled Yocto OS (kernel 4.19.125). The UFS storage device works in gear 4 with version (see the attachment #1). After switching to AOSP (the AOSP project is compiled and flashed using device/linaro/dragonboard/installer/rv5/flash-all-aosp.sh), the storage is limited to gear 3 (see the attachment #2).
With UFS protocol analyzer we’d discovered that gear limitation comes from the UFS controller
I’ve recompiled the kernel, but it doesn’t help (and I couldn’t find any UFS controller gear limitations in DTS anyway)
How can I solve this problem?