From acb87dfb4b847de1de1134e3e767e9a773d6454e Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Thu, 3 May 2012 15:47:57 +0100 Subject: [PATCH] drm/i915: Limit calling mark-busy only for potential scanouts The principle of intel_mark_busy() is that we want to spot the transition of when the display engine is being used in order to bump powersaving modes and increase display clocks. As such it is only important when the display is changing, i.e. when rendering to the scanout or other sprite/plane, and these are characterised by being pinned. v2: Mark the whole device as busy on execbuffer and pageflips as well and rebase against dinq for the minor bug fix to be immediately applicable. Signed-off-by: Chris Wilson [danvet: fix compile fail.] Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_gem_execbuffer.c | 5 ++++- drivers/gpu/drm/i915/intel_display.c | 4 ++++ 2 files changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c index 206b9bb..21fc11d 100644 --- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c +++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c @@ -967,11 +967,14 @@ i915_gem_execbuffer_move_to_active(struct list_head *objects, obj->pending_gpu_write = true; list_move_tail(&obj->gpu_write_list, &ring->gpu_write_list); - intel_mark_busy(ring->dev, obj); + if (obj->pin_count) /* check for potential scanout */ + intel_mark_busy(ring->dev, obj); } trace_i915_gem_object_change_domain(obj, old_read, old_write); } + + intel_mark_busy(ring->dev, NULL); } static void diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index b322bde..1cbe268 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -5558,6 +5558,9 @@ void intel_mark_busy(struct drm_device *dev, struct drm_i915_gem_object *obj) mod_timer(&dev_priv->idle_timer, jiffies + msecs_to_jiffies(GPU_IDLE_TIMEOUT)); + if (obj == NULL) + return; + list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { if (!crtc->fb) continue; @@ -6007,6 +6010,7 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc, goto cleanup_pending; intel_disable_fbc(dev); + intel_mark_busy(dev, obj); mutex_unlock(&dev->struct_mutex); trace_i915_flip_request(intel_crtc->plane, obj); -- 2.7.4