Add a reset interface

Takashi Iwai tiwai at
Mon Jan 24 08:28:24 PST 2011

At Mon, 24 Jan 2011 15:55:27 +0000,
Chris Wilson wrote:
> For i915 there is a need to invalidate some cached state after resuming or
> reseting the GPU. This is not quite the same as simply restoring saved
> state (i.e. the standard suspend resume method), so do not seem to merit
> reusing the save|restore vfuncs.  Instead I propose a
>    drm_mode_config_reset(struct drm_device *);
> routine to iterate over all the attached CRTCs, encoders and connectors
> and call any supplied reset vfunc.
> This is required to fix some modesetting regressions across resume in
> 2.6.38:

I quickly tried these patches.  After adding the missing EXPORT_SYMBOL,
it seems working fine.  Tested on a SNB laptop and a PineView laptop.

Put my tag to all patches:
  Tested-by: Takashi Iwai <tiwai at>



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