[Bug 67030] [HSW] no modes bigger than 1080p in the parsed EDID for 4k TV on both HDMI/VGA

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=67030

--- Comment #38 from Damien Lespiau <damien.lespiau at gmail.com> ---
Created attachment 83387
  --> https://bugs.freedesktop.org/attachment.cgi?id=83387&action=edit
X server patch to look at the TMDS max frequency field from the EDID

Hi,

With this additional patch to the xserver, I can now see the 4k modes with
xrandr. I cannot actually test the whole chain as I'm faking having the
monitor, but you'll hopefully be able to test it.

So you need in addition of the 2 kernel patches already mentioned:

- This patch to the X server
- The master branch of the DDX driver (a bug fixed in the UXA part of the
driver) http://cgit.freedesktop.org/xorg/driver/xf86-video-intel. Or you can
just cherry-pick "uxa/display: Keep the EDID blob around for the lifetime of an
output"

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