https://bugs.freedesktop.org/show_bug.cgi?id=104508
Bug ID: 104508
Summary: Unable to set "IT Content" bit for HDMI and
DisplayPort
Product: DRI
Version: unspecified
Hardware: All
OS: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: DRM/Radeon
Assignee: dri-devel@lists.freedesktop.org
Reporter: nw9165-3...@yahoo.com
Hi,
apparently the Intel HD Graphics driver for Windows has a "IT Content" option
that can be either enabled or disabled, see following screenshot for example:
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 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#post24629922
> HDMI specs "IT Content" flag is set On in video stream.
>
> CEA-861:
> "In IT applications (e.g. involving bit mapped text),
> each pixel in the source’s 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 RADEON Linux driver.
Can you please add an option to the RADEON Linux driver which allows to enable
the "IT Content" bit?
Regards
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