[Nouveau] NV130 - gtx 1050 ti

[Karl Schmidt]

On 05/06/2017 12:38 PM, Ilia Mirkin wrote:
> The information comes from the EDID blob supplied by the monitor.
> Presumably hwinfo has a primitive EDID parser, which is where that
> information comes from. A more complete EDID parser is available at
>
> https://cgit.freedesktop.org/xorg/app/edid-decode/
>
> For example,
>
> $ ./src/edid-decode/edid-decode /sys/class/drm/card0-DVI-D-1/edid

Thanks for you useful reply. That did the trick - I got quite different information than I did with 
hwinfo or get-edid but more important - different than what I see in the Xorg.0.log.  ( I think 
deid-decode is the most complete).

So I'm guessing that nouveau computes the modelines from the combination of what the card and edid 
claim they support.


> It's quite likely that nouveau doesn't support using YUV outputs
> though (which I'm guessing is what the 4:4:4 thing is referring to...
> I always get confused by such notation),

Sadly, it is a throw back to 'Chroma subsampling' (my days designing with NTSC editing hardware 
still haunt me.)  They reduce the color information so there is less bandwidth in the cable. (thus 
displayport and thunderbolt3 are headed to 40G (need 18G+overhead or 20G for 12bit 3840x2160 60hz 
RGB or only 12G+ for 8bit(24))

> only RGB. Also there's no
> HDMI 2.0 support in nouveau as yet, mostly due to lack of interest and
> hardware. However you should still see a 4k at 30 mode exposed
> (probably).

HDMI2 does support RGB - see:
http://www.hdmi.org/manufacturer/hdmi_2_0/hdmi_2_0_faq.aspx#146

The main wiki page probably ought to say what subsets of HDMI nouveau supports.  Some of the chip 
sets from back in the 900 series support hdmi2.0 - so to say nouveau supports that chip sort of 
implies that it does hdmi2.0.  Anyway - 4k monitors/TVs are getting cheaper and really helpful for 
someone coding - soon will be common.  I've got another card coming that I can test with.



--------------------------------------------------------------------------------

Karl Schmidt                                  EMail Karl at xtronics.com
                                               WEB https://secure.transtronics.com
3209 West 9th Street                             Ph (785) 841-3089
Lawrence, KS 66049                              FAX (785) 841-3089

The government can print money  - they can't print wealth. kps
--------------------------------------------------------------------------------