[Bug 103471] HDMI detection fails, i915 Intel HD400

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103471

Ville Syrjala <ville.syrjala at linux.intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |RESOLVED
         Resolution|---                         |FIXED

--- Comment #10 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
(In reply to Pablo from comment #9)
> (In reply to Ville Syrjala from comment #8)
> > (In reply to Pablo from comment #7)
> > > Created attachment 135088 [details]
> > > cat /sys/kernel/debug/dri/0/i915_opregion
> > 
> >         EFP device info:
> >                 Device handle: 0x0040 (EFP 2 (HDMI/DVI/DP))
> >                 ...
> >                 Port: 0x03 (HDMI-D)
> >                 AIM I2C pin: 0x00
> >                 AIM Slave address: 0x00
> >                 DDC pin: 0x04
> > 
> > "i2c-3   i2c             i915 gmbus dpc                          I2C adapter"
> > 
> > Those two pieces of information do suggest that the commit in question
> > should in fact fix this.
> 
> Kernel 4.13.8 fixed the issue! Thanks! Do you know if there is patch for
> Kernel 4.4.0-97 that I could apply using dkms?

No idea about ubuntu kernels. Presumably they will still provide stable kernel
updates, and the patch should eventually percolate down to all stable kernels
(I hope).

Anyways, thanks for reporting the issue and testing the fix.

Marking the bug as fixed:
commit ea850f64c2722278f150dc11de2141baeb24211c (tag:
drm-intel-fixes-2017-10-11)
Author: Jani Nikula <jani.nikula at intel.com>
Date:   Thu Sep 28 11:21:57 2017 +0300

    drm/i915/bios: parse DDI ports also for CHV for HDMI DDC pin and DP AUX
channel

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