force yuv 4:2:0 output

force yuv 4:2:0 output

[Wolfgang Haupt]

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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@60.
The TV only accepts 4k@60 at yuv 4:2:0 (I also saw hdmi range extenders and
stuff that don't support yuv 4:4:4 on 4k@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.


Kind Regards,
Wolfgang

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Re: force yuv 4:2:0 output

[Jani Nikula]

On Mon, 18 Sep 2017, Wolfgang Haupt <haupt.wolfgang@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@60.
> The TV only accepts 4k@60 at yuv 4:2:0 (I also saw hdmi range extenders and
> stuff that don't support yuv 4:4:4 on 4k@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
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Re: force yuv 4:2:0 output

[Wolfgang Haupt]

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I've tried v4.14-rc1.
Now I do not have 4k@60 anymore.

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


Best Regards,
Wolfgang

Jani Nikula <jani.nikula@linux.intel.com> schrieb am Di., 19. Sep. 2017 um
12:08 Uhr:

> On Mon, 18 Sep 2017, Wolfgang Haupt <haupt.wolfgang@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@60.
> > The TV only accepts 4k@60 at yuv 4:2:0 (I also saw hdmi range extenders
> and
> > stuff that don't support yuv 4:4:4 on 4k@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
>

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Re: force yuv 4:2:0 output

[Jani Nikula]

On Wed, 20 Sep 2017, Wolfgang Haupt <haupt.wolfgang@gmail.com> wrote:
> I've tried v4.14-rc1.
> Now I do not have 4k@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@linux.intel.com> schrieb am Di., 19. Sep. 2017 um
> 12:08 Uhr:
>
>> On Mon, 18 Sep 2017, Wolfgang Haupt <haupt.wolfgang@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@60.
>> > The TV only accepts 4k@60 at yuv 4:2:0 (I also saw hdmi range extenders
>> and
>> > stuff that don't support yuv 4:4:4 on 4k@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
>>

-- 
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Re: force yuv 4:2:0 output

[Wolfgang Haupt]

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Done.
https://bugs.freedesktop.org/show_bug.cgi?id=102928

Let me know if I miss anything or you need me to do more tests.

BR,
Wolfgang

Jani Nikula <jani.nikula@linux.intel.com> schrieb am Do., 21. Sep. 2017 um
10:14 Uhr:

>
> On Wed, 20 Sep 2017, Wolfgang Haupt <haupt.wolfgang@gmail.com> wrote:
> > I've tried v4.14-rc1.
> > Now I do not have 4k@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@linux.intel.com> schrieb am Di., 19. Sep. 2017
> um
> > 12:08 Uhr:
> >
> >> On Mon, 18 Sep 2017, Wolfgang Haupt <haupt.wolfgang@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@60.
> >> > The TV only accepts 4k@60 at yuv 4:2:0 (I also saw hdmi range
> extenders
> >> and
> >> > stuff that don't support yuv 4:4:4 on 4k@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
>

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