From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org Subject: [Bug 104509] New: Unable to set "Content Type" bit for HDMI and DisplayPort Date: Fri, 05 Jan 2018 23:07:36 +0000 Message-ID: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0124447252==" Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: nouveau-bounces-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org Sender: "Nouveau" To: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org List-Id: nouveau.vger.kernel.org --===============0124447252== Content-Type: multipart/alternative; boundary="15151936561.2E58a.9356"; charset="UTF-8" --15151936561.2E58a.9356 Date: Fri, 5 Jan 2018 23:07:36 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.freedesktop.org/ Auto-Submitted: auto-generated https://bugs.freedesktop.org/show_bug.cgi?id=3D104509 Bug ID: 104509 Summary: Unable to set "Content Type" bit for HDMI and DisplayPort Product: xorg Version: unspecified Hardware: All OS: Linux (All) Status: NEW Severity: normal Priority: medium Component: Driver/nouveau Assignee: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org Reporter: nw9165-3201-/E1597aS9LQAvxtiuMwx3w@public.gmane.org QA Contact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org Hi, apparently the Intel HD Graphics driver for Windows has a "IT Content" opti= on that can be either enabled or disabled, see following screenshot for exampl= e: https://www.howtogeek.com/wp-content/uploads/2016/12/img_5855c293ac26d.jpg According to a post on the AVS Forum, enabling "IT Content" does the follow= ing: http://www.avsforum.com/forum/26-home-theater-computers/1477460-theory-abou= t-intel-s-hdmi-quantization-range-setting-full-0-255-a-7.html#post24629922 > HDMI specs "IT Content" flag is set On in video stream. >=20 > CEA-861: > "In IT applications (e.g. involving bit mapped text), > each pixel in the source=E2=80=99s frame buffer is most clearly > displayed if it is directly mapped to a light-emitting pixel > on the display device - such that adjacent pixels are > completely independent and do not interact. > The IT content bit indicates when picture content is > composed according to common IT practice (i.e. without > regard to Nyquist criterion) and is unsuitable for > analog reconstruction or filtering. When the IT content bit > is set to 1, downstream processors should pass > pixel data unfiltered and without analog reconstruction." Apparently there is no option for it on the nouveau Linux driver. Can you please add an option to the nouveau Linux driver which allows to en= able the "IT Content" bit? Regards --=20 You are receiving this mail because: You are the assignee for the bug.= --15151936561.2E58a.9356 Date: Fri, 5 Jan 2018 23:07:36 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.freedesktop.org/ Auto-Submitted: auto-generated
Bug ID 104509
Summary Unable to set "Content Type" bit for HDMI and Displ= ayPort
Product xorg
Version unspecified
Hardware All
OS Linux (All)
Status NEW
Severity normal
Priority medium
Component Driver/nouveau
Assignee nouveau@lists.freedesktop.org
Reporter nw9165-3201@yahoo.com
QA Contact xorg-team@lists.x.org 

Hi,

apparently the Intel HD Graphics driver for Windows has a "IT Content&=
quot; option
that can be either enabled or disabled, see following screenshot for exampl=
e:

https://www.howtogeek.com/wp-content/uploads/2016/12/img_5855c2=
93ac26d.jpg

According to a post on the AVS Forum, enabling "IT Content" does =
the following:

http://www.avsforum.com/forum/26-home-theater-computers/1477460=
-theory-about-intel-s-hdmi-quantization-range-setting-full-0-255-a-7.html#p=
ost24629922

> HDMI specs "IT Content" flag is set On=
 in video stream.
>=20
> CEA-861:
> "In IT applications (e.g. involving bit mapped text),
> each pixel in the source=E2=80=99s frame buffer is most clearly
> displayed if it is directly mapped to a light-emitting pixel
> on the display device - such that adjacent pixels are
> completely independent and do not interact.
> The IT content bit indicates when picture content is
> composed according to common IT practice (i.e. without
> regard to Nyquist criterion) and is unsuitable for
> analog reconstruction or filtering. When the IT content bit
> is set to 1, downstream processors should pass
> pixel data unfiltered and without analog reconstruction."

Apparently there is no option for it on the nouveau Linux driver.

Can you please add an option to the nouveau Linux driver which allows to en=
able
the "IT Content" bit?

Regards

You are receiving this mail because:
  • You are the assignee for the bug.
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