[Bug 172421] radeon: allow to set the TMDS frequency by a special kernel parameter

[bugzilla-daemon at kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=172421

Eduard Bloch (blade at debian.org) changed:

           What    |Removed                     |Added
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                 CC|                            |blade at debian.org

--- Comment #24 from Eduard Bloch (blade at debian.org) ---
Hey guys, I am trying to port this mod to AMDGPU. The intention is, however,
not to unlock the advertised features but to force an APU to accept HDMI clocks
over a DVI port (with DVI-HDMI cable, the monitor expects HDMI signal).

The port itself is easy but it does not work. amdgpu.hdmimhz=... parameter has
apparently no effect, Xorg keeps reporting:

[    16.107] (--) AMDGPU(0): HDMI max TMDS frequency 280000KHz

Does anyone have an idea how to tackle this?

Here is the patch:
https://github.com/Code7R/linux/commits/amdgpu-custom-maxtdmsclock

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