[Intel-gfx] HDMI colour space and depth questions (YCbCr, xvYCC, Deep Colour)

Jesse Barnes jbarnes at virtuousgeek.org
Mon Jan 16 23:12:54 CET 2012

On Mon, 16 Jan 2012 21:50:22 +0000
Andy Burns <xorg.lists at burns.me.uk> wrote:

> Jesse Barnes <jbarnes at virtuousgeek.org> wrote:
> > Andy Burns <xorg.lists at burns.me.uk> wrote:
> >
> >> Similarly is there any setting to indicate an xvYCC gamut, which might
> >> persuade the amp not to clip the colours?
> >
> > There is a way to configure the gamut to be compressed (default) or
> > expanded (up to 255).  But that's not exposed either.
> I see the following from the man page
> "DVI/HDMI outputs. Avaliable common properties include:
> BROADCAST_RGB - method used to set RGB color range(full range 0-255,
> not full range 16-235)
> Adjusting this propertie allows you to set RGB color range on each
> channel in order to match HDTV requirment(default 0 for full range).
> Setting 1 means RGB color range is 16-235, 0 means RGB color range is
> 0-255 on each channel.
> SDVO and DVO TV outputs are not supported by the driver at this time."
> Does that mean I *can* toggle the studio colour range on the fly, or
> is the doc wrong?

Ah maybe we do expose it; I'm out of date.  Yeah that should change the
color range handling...

Jesse Barnes, Intel Open Source Technology Center
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