[Intel-gfx] [PATCH] drm/i915: Init power domains early in driver load

Meelis Roos mroos at linux.ee
Thu Jan 7 11:41:45 PST 2016

> commit ac9b8236551d1177fd07b56aef9b565d1864420d
> Author: Ville Syrjälä <ville.syrjala at linux.intel.com>
> Date:   Fri Nov 27 18:55:26 2015 +0200
>     drm/i915: Introduce a gmbus power domain
> gmbus also needs the power domain infrastructure right from the start,
> since as soon as we register the i2c controllers someone can use them.
> v2: Adjust cleanup paths too (Chris).
> v3: Rebase onto -nightly (totally bogus tree I had lying around) and
> also move dpio init head (Ville).
> v4: Ville instead suggested to move gmbus setup later in the sequence,
> since it's only needed by the modeset code.
> v5: Move even close to the actual user, right next to the comment that
> states where we really need gmbus (and interrupts!).
> Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
> Cc: Patrik Jakobsson <patrik.jakobsson at linux.intel.com>
> Cc: Imre Deak <imre.deak at intel.com>
> Cc: Jani Nikula <jani.nikula at intel.com>
> Cc: Meelis Roos <mroos at linux.ee>
> Cc: Chris Wilson <chris at chris-wilson.co.uk>
> Fixes: ac9b8236551d ("drm/i915: Introduce a gmbus power domain")
> Cc: stable at vger.kernel.org
> References: http://www.spinics.net/lists/intel-gfx/msg83075.html
> Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
> ---
> Meelis, can you pls retest this one?

I also confirmed that my 865G chipset computer was suffering from the 
same problem and the patch also helps on D865GLC mainboard with my 
userspace that autoloads eeprom driver.

Meelis Roos (mroos at linux.ee)

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