[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 #18 from Elmar Stellnberger <estellnb at elstel.org> ---
Unfortunately making radeon_dig_monitor_is_duallink return true under all or
certain circumstances produces distortions of otherwise working modes while it
can not enable a single mode that would not have worked before. Besides this I
heavily doubt that a true-return for dual-link would be necessary at all for a
hdmimhz of 225 and modes like 3840x2160_23.00. Is there anything else I could
try? - or was it neXus mobile who has betrayed me claiming a card 4K ready
which definitely isn`t?

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