[Intel-gfx] force yuv 4:2:0 output

[Jani Nikula]

On Wed, 20 Sep 2017, Wolfgang Haupt <haupt.wolfgang at gmail.com> wrote:
> I've tried v4.14-rc1.
> Now I do not have 4k at 60 anymore.

Okay, please file a bug at
https://bugs.freedesktop.org/enter_bug.cgi?product=DRI&component=DRM/Intel

> dmesg with drm.debug:
> http://sprunge.us/TKbO

Attach dmesg all the way from boot to the bug please.

BR,
Jani.

>
>
> Best Regards,
> Wolfgang
>
> Jani Nikula <jani.nikula at linux.intel.com> schrieb am Di., 19. Sep. 2017 um
> 12:08 Uhr:
>
>> On Mon, 18 Sep 2017, Wolfgang Haupt <haupt.wolfgang at gmail.com> wrote:
>> > Hello everyone,
>> >
>> > recently I played around with my kabylake i5 nuc box and found that on
>> some
>> > TV's
>> > the screen stays black as soon as I go to 4k at 60.
>> > The TV only accepts 4k at 60 at yuv 4:2:0 (I also saw hdmi range extenders
>> and
>> > stuff that don't support yuv 4:4:4 on 4k at 60).
>> > I tried to force limited mode through xrandr or by overriding the edid
>> > information, but nothing worked so far.
>> > Now I wonder if there is a way to force yuv 4:2:0 ouptut on the kernel
>> > level.
>> > Thanks.
>>
>> Please try v4.14-rc1.
>>
>> BR,
>> Jani.
>>
>>
>> --
>> Jani Nikula, Intel Open Source Technology Center
>>

-- 
Jani Nikula, Intel Open Source Technology Center