[Bug 93885] radeon: allow the user to set a maximum HDMI pixel clock (in MHz) by a kernel parameter

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93885

--- Comment #8 from Roland Scheidegger <sroland at vmware.com> ---
The card has a dual-link DVI port - it should, in theory, be possible to
support 3840x2160 at 30Hz through that (as dual-link DVI has twice the bandwidth
of that HDMI port). For that to work you need of course a monitor which has a
dual-link dvi port (obviously, passive dvi->hdmi adapters won't help).
That is however from a theoretical point of view (that is, such a resolution
should not exceed bandwidth limits) - YMMV.

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