rockchip: drm: analogix_dp-rockchip would stock the kernel

rockchip: drm: analogix_dp-rockchip would stock the kernel

[ayaka]

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])
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

Re: rockchip: drm: analogix_dp-rockchip would stock the kernel

[Mark yao]

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.

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.
     https://patchwork.kernel.org/patch/9374135

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
>
>
>


-- 
Ｍark Yao


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Re: rockchip: drm: analogix_dp-rockchip would stock the kernel

[Randy Li]

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.
>     https://patchwork.kernel.org/patch/9374135
>
> 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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