[Bug 104139] [CFL] Screen goes blank right after boot.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104139

--- Comment #13 from Kai-Heng Feng <kai.heng.feng at canonical.com> ---
(In reply to Rodrigo Vivi from comment #12)
> [drm:intel_hdmi_init_connector [i915]] Using DDC pin 0x6 for port D (VBT)
> 
> makes me think that you are still missing one patch on your tree:
> 
> 9c3b2689d01f ("drm/i915/cnl: Map VBT DDC Pin to BSpec DDC Pin.")
> 
> could you please double check?

I can confirm it's in the tree.

> 
> Also, is it possible to test with drm-tip branch?
> cgit.freedesktop.org/drm/drm-tip

Sure, I'll use this branch to test again.

> 
> drm-intel-nightly doesn't exist anymore, so I don't know exactly the code
> that your tree there is fetching.

Like my previous comment, the kernel was built against this commit:
commit c4fb60b9aba9f939d3f8575df23fd8d5958ec6ed
(drm-intel/drm-intel-next-queued)
Author: Jani Nikula <jani.nikula at intel.com>
Date:   Thu Jan 18 17:33:10 2018 +0200

    drm/i915/bios: add DP max link rate to VBT child device struct

All three commits you mentioned are included.

The nightly part was to explain how kernel in [1] gets built. It's kinda
irrelevant in this context though.

[1] http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel-nightly/.

> 
> Thanks

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