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drm/i915: Don't disable the GPU for older gen on wedging 

If we issue a device level GPU reset on the older gen, it will disable
key components of the GMCH and the display engine. The purpose of
wedging is to simply prevent further GEM usage without disabling KMS, so
we need to be careful when we do issue the reset on wedging.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20180726085033.4044-3-chris@chris-wilson.co.uk
Reviewed-by: Michał Winiarski <michal.winiarski@intel.com>
This commit is contained in:
Chris Wilson 2018-07-26 09:50:33 +01:00
parent 7ed43df720
commit ec5b65a97c
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/i915/i915_gem.c
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@ -3329,7 +3329,8 @@ void i915_gem_set_wedged(struct drm_i915_private *i915)
i915->caps.scheduler = 0;
/* Even if the GPU reset fails, it should still stop the engines */
intel_gpu_reset(i915, ALL_ENGINES);
if (INTEL_GEN(i915) >= 5)
intel_gpu_reset(i915, ALL_ENGINES);
/*
* Make sure no one is running the old callback before we proceed with