From 8e1cb32d515bc6b691782104b00d9056a33127c8 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Thu, 20 Sep 2018 17:13:43 +0100 Subject: [PATCH] drm/i915: Park the GPU on module load 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 Cc: Tvrtko Ursulin Reviewed-by: Tvrtko Ursulin Link: https://patchwork.freedesktop.org/patch/msgid/20180920161343.1117-1-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/i915_gem.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index b79362bbd97b..db9688d14912 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -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; -- 2.11.0