I have a FirePro V5900 (Cayman part from the Northern Islands family) which I run with EXA acceleration on 6.2. H264 video with a resolution of 3840x2160 and 25fps play flawlessly with the OpenGL acceleration in mpv (on a WSXGA+ display). Ostensibly this card can drive UHD monitors at their native refresh rate that support the MST mode (two virtual panels at 1920x2160), while its longer brother, the V7900, can do SST mode.
--
Patrick Harper
paianni@fastmail.com
On Sat, 28 Apr 2018, at 11:00, Joe Gidi wrote:
> > On Wed, Apr 25, 2018 at 10:49:53AM -0400, Joe Gidi wrote:
> >>
> >> > On Wed, Apr 25, 2018 at 09:08:12PM +1000, Jonathan Gray wrote:
> >> >> drivers/gpu/drm/amd in linux has over 1.5 million lines of code.
> >> Which
> >> >> is multiple times larger than the complete OpenBSD kernel source...
> >>
> >> Thanks for this update!
> >>
> >> Just to clarify, before I spend a bunch of money on new hardware, should
> >> I
> >> be able to use a Radeon R7 250 to drive a 4k monitor via DisplayPort
> >> with
> >> this updated driver?
> >>
> >> Thanks again,
> >
> > It appears that 'R7 250' can mean either a cape verde or oland radeon
> > depending on the model. Both are GCN parts.
> >
> > 4k 30Hz should be possible with HDMI, 4k 60Hz on HDMI requires HDMI 2.0
> > Both claim support for displayport 1.2 which should be able to do
> > 4k 60Hz. HDMI 2.0 seems to only be on later hardware with DCE >= 11
> > carrizo (not carrizo-l which is mullins), polaris etc.
> >
> > With the low end radeons displayport is sometimes only available on
> > oem models of cards sold as options for systems marketed as business
> > desktops or workstations.
> >
> > And as mentioned earlier for acceleration you'll currently have to build
> > a different version of Mesa than what OpenBSD releases/snapshots ship
> > with.
>
> Hi Jonathan,
>
> Thanks for the detailed answer!
>
> As best I can tell from wading through the mess of marketing names and
> specifications, accelerated 4k video is currently not an option with
> Radeon cards; the older cards don't support high-enough resolutions, and
> the newer ones don't have acceleration support yet due to the Mesa
> problem. Looks like I might need to buy an Intel machine or wait for the
> Mesa issues to get resolved.
>
> Thanks again,
> Joe
>
>
> --
>
> Joe Gidi
> joe@entropicblur.com
>
> "You cannot buy skill." -- Ross Seyfried
>
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