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drm/i915/gen9: flush DMC fw loading work during system suspend 

Currently during system s/r we enable/disable DC6, so before we do so
make sure that the firmware loading is complete.

Note that whether we need to enable DC6 for S3/S4 is still open.  At
least the firmware program is lost during S3 and we need to reprogram it
after resuming. Until this is clarified we keep the current behavior and
enable/disable DC6.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Animesh Manna <animesh.manna@intel.com>
Tested-by: Daniel Stone <daniels@collabora.com> # SKL
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1446069547-24760-13-git-send-email-imre.deak@intel.com
This commit is contained in:
Imre Deak 2015-10-28 23:59:06 +02:00 committed by Jani Nikula
parent 15e72c1fc1
commit f514c2d842
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/i915/i915_drv.c
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@ -693,6 +693,9 @@ static int i915_drm_suspend(struct drm_device *dev)
intel_display_set_init_power(dev_priv, false);
if (HAS_CSR(dev_priv))
flush_work(&dev_priv->csr.work);
return 0;
}