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drm/i915: Clear per-engine fault register as early as possible 

From gen6, the hardware tracks address lookup failures and we should
clear those registers upon startup to prevent false positives. However,
this was happening before we have the engines defined (intel_uncore_init())
and the for_each_engine loop was just a nop. The earliest we can call
this is inside intel_engines_init_mmio().

Suggested-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Michel Thierry <michel.thierry@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20171111004448.12360-1-michel.thierry@intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
hifive-unleashed-5.1
Michel Thierry 2017-11-10 16:44:47 -08:00 committed by Chris Wilson
parent dab9178333
commit ce453b3e42
2 changed files with 2 additions and 2 deletions
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2
drivers/gpu/drm/i915/intel_engine_cs.c
View File

@ -289,6 +289,8 @@ int intel_engines_init_mmio(struct drm_i915_private *dev_priv)
device_info->num_rings = hweight32(mask);
i915_check_and_clear_faults(dev_priv);
return 0;
cleanup:

2
drivers/gpu/drm/i915/intel_uncore.c
View File

@ -1420,8 +1420,6 @@ void intel_uncore_init(struct drm_i915_private *dev_priv)
iosf_mbi_register_pmic_bus_access_notifier(
&dev_priv->uncore.pmic_bus_access_nb);
i915_check_and_clear_faults(dev_priv);
}
void intel_uncore_fini(struct drm_i915_private *dev_priv)