Gamma problem after 4096 LUT entries change

[Môshe van der Sterre]

On 04/16/2018 04:07 PM, Harry Wentland wrote:
> On 2018-04-15 05:37 AM, Môshe van der Sterre wrote:
>> Hello Leo Li,
>>
>> The current mainline has a gamma regression for me, running wayland on a Ryzen 5 2400G (integrated gpu). Colors are much too dark after the following commit:
>> 086247a4b2fb "drm/amd/display: Use 4096 lut entries"
>>
>>  From this commit alone I cannot deduce how to properly address the problem. Reverting restores the correct colors. Unfortunately, I have no other amdgpu hardware to test if this is specific to the integrated gpu or not.
>>
>> I'll gladly test possible fixes or debug a little further if you can point me in the right direction.
>>
> Can you give attached patch a spin. We'll probably merge it or a variant of it soon.
>
> Harry
Thank you Harry. The patch works on my system.