[PATCH 0/1] [Intrepid SRU] LP#276943 -- fix resume for intel GM965/GM45

[Andy Whitcroft]

Systems with Intel graphics, specifically those with GM965/GM45 arrays,
suffer from resume hangs.  These systems reliably lock up with a black
screen, showing a cursor and often the background of the unlock window.
Reume is always unsuccessful.  This seems to be caused by a lack of state save over suspend/resume for these chipsets.

Following this email is a patch for this issue.  This saves this additional
GPU state during suspend.  This is a GPU specific modification only
triggering where the hardware is detected.  Two community testers, plus
myself, report this as fixing their resume problems.

Proposing this for SRU to Intrepid.

-apw

Andy Whitcroft (1):
  i915: Save/restore MCHBAR_RENDER_STANDBY on GM965/GM45

 drivers/gpu/drm/i915/i915_drv.c |    9 +++++++++
 drivers/gpu/drm/i915/i915_drv.h |    4 ++++
 2 files changed, 13 insertions(+), 0 deletions(-)