[OpenOCD-user] Advice on Snapdragon 820

[Sergei A. <sa...@gm...>]

Hello!
I'd like to use OpenOCD with a development board containing a Qualcomm
Snapdragon 820 (APQ8096) processor, its architecture is AArch64. Here
is the scanned JTAG chain:

Info : JTAG tap: auto0.tap tap/device found: 0x5ba00477 (mfg: 0x23b
(ARM Ltd.), part: 0xba00, ver: 0x5)
Info : JTAG tap: auto1.tap tap/device found: 0x000016dd (mfg: 0x36e
(Certicom Corporation), part: 0x0001, ver: 0x0)
Info : JTAG tap: auto2.tap tap/device found: 0x4003e0e1 (mfg: 0x070
(Qualcomm), part: 0x003e, ver: 0x4)

I suppose, I can debug device 0x5ba00477 as aarch64 target using
development source code. What repo/branch of OpenOCD should I use?
On Gerrit there are lots of patches for aarch64, I'm confused about
what exactly is state-of-the-art or has best chances to work on my
hardware.