Hi Martin,
What are the JTAG ID you have used for i.MX6qp ?? I am also trying to connect openocd 0.8.0 to imx6qp board, but i am getting below error.
Error: JTAG scan chain interrogation failed: all zeroes
Error: Check JTAG interface, timings, target power, etc.
Error: Trying to use configured scan chain anyway...
Error: imx6.dap: IR capture error; saw 0x00 not 0x01
Warn : Bypassing JTAG setup events due to errors
Warn : Invalid ACK 0 in JTAG-DP transaction
Thanks,
Prathamesh Rahate.