Created attachment 115838 [details]
dmesg with debug patches from comments 88, 93, 95, 97 & 99 applied, without
set_rx_power_state

(In reply to Alex Deucher from comment #99)
> Created attachment 115786 [details] [review] [review]
> more debugging
> 
> Does this patch help?  Please include all the radeon related output.  The
> pointers are fine.  The problem seems to be that the panel returns all 0s
> for the dpcd unless the panel is in D0 state.

When I tried applying this patch, my laptop freeze (network gets unresponsive).
It worked only when *radeon_dp_set_rx_power_state(&radeon_connector->base,
DP_SET_POWER_D0);* was commented out in radeon_dp_getdpcd().

Patches from #101 & #102 also didnt help.