rockchip: drm: analogix_dp-rockchip would stock the kernel

Randy Li at
Sun Oct 16 18:12:50 PDT 2016

On 10/17/2016 08:57 AM, Mark yao wrote:
> On 2016年10月16日 02:03, ayaka wrote:
>> Hello:
>>    I meet a problem with eDP in rk3288 with the linux next 20161006,
>> it is just like the early stage of 4.4
>> kernel.  I have added a eDP panel entry in the firefly reload board,
>> once the kernel loaded analogix_dp-rockchip.ko, after printed the
>> following two lines, the kernel stop working.
>> rockchip-drm display-subsystem: bound ff940000.vop (ops
>> vop_component_ops [rockchipdrm])
>> rockchip-drm display-subsystem: bound ff930000.vop (ops
>> vop_component_ops [rockchipdrm])
> Hi ayaka
> This log seems no problem.
I found the problem, it is the eDP_AVDD_1V0 and eDP_AVDD_1V8 must have a 
proper power supply. I would submit a patch to enable the regulator at 
DP driver.
> How about tested it with build-in? we had test it with build-in.
> Maybe this patch can help you, you can have a try.
> Thanks.
>> In the early June of the 4.4 kernel, I meet the same problem with
>> rk3288 evb board with different error message, I have to disable the
>> display system that time.
>>   In the today test, I meet the same problem with rk3399 evb board in
>> 4.4.
>>   I have no idea what caused that, and it is a little hard to debug as
>> kernel still would never kill that task.
>>                                                             Randy Li

Randy Li
The third produce department
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