Comment # 5 on bug 939607 from Takashi Iwai

Thanks, now I added myself there.
Meanwhile, can you perform the test Simon suggested there?
  "Can you test a boot with "drm_kms_helper.dp_aux_i2c_transfer_size=1" on the
kernel command line? That will reduce the transfer size back to 1 byte per AUX
read, but leave the rest of my changes in place.

  If that works, I'd be interested in knowing whether transfer_size of 2, 4, or
8 works for you - Windows always uses 16 on Intel Haswell platforms. You have
Broadwell, which I haven't had a chance to test."