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drm/i915: Park the GPU on module load

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Once we have flushed the first request through the system to both load a
context and record the default state; tell the GPU to park and idle
itself, putting itself immediately (hopefully at least) into a
powersaving state, and allowing ourselves to start from known state
after setting up all our bookkeeping.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180920161343.1117-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2018-09-20 17:13:43 +01:00
parent b8bdd9cc60
commit 8e1cb32d51
1 changed files with 8 additions and 0 deletions
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8
drivers/gpu/drm/i915/i915_gem.c
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@ -5419,6 +5419,14 @@ static int __intel_engines_record_defaults(struct drm_i915_private *i915)
assert_kernel_context_is_current(i915);
/*
* Immediately park the GPU so that we enable powersaving and
* treat it as idle. The next time we issue a request, we will
* unpark and start using the engine->pinned_default_state, otherwise
* it is in limbo and an early reset may fail.
*/
__i915_gem_park(i915);
for_each_engine(engine, i915, id) {
struct i915_vma *state;
void *vaddr;