[Bug 107585] Wrong max TMDS clock rate on ThinkPad W541 mini-DisplayPort output

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107585

--- Comment #7 from Jani Nikula <jani.nikula at intel.com> ---
Please keep the communication on the bug, thanks.

On Thu, 16 Aug 2018, Simon Ruggier <simon80 at gmail.com> wrote:
> Should I bother booting with drm-tip? I never attached a dmesg from
> 4.18, so it's missing either way, but from your responses, I'm
> guessing there's nothing in drm-tip that fixes this.

I don't recall any fixes between v4.18 and drm-tip that would address
this. It might prove useful to attach the dmesg. But based on the
snippets you've included so far it looks like you have a type 1 dual
mode adaptor, and we limit it to 165 MHz.

IIUC whether clocks higher than 165 MHz work on type 1 adapters is pure luck,
and depend on the electrical characteristics of the adapter and the cable.
Since they were designed with max 165 MHz in mind, all bets are off.

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