drm/i915: Only run idle processing from i915_gem_retire_requests_worker

When adding the fb idle detection to mark-inactive, it was forgotten
that userspace can drive the processing of retire-requests. We assumed
that it would be principally driven by the retire requests worker,
running once every second whilst active and so we would get the deferred
timer for free. Instead we spend too many CPU cycles reclocking the LVDS
preventing real work from being done.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reported-and-tested-by: Alexander Lam <lambchop468@gmail.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=58843
Cc: stable@vger.kernel.org
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 801f77ece72e5586e842b176a8d0daaec4e7440c..d7461771be2ddf3355b3421732865bb340d5021a 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1899,9 +1899,6 @@ i915_gem_object_move_to_inactive(struct drm_i915_gem_object *obj)
        BUG_ON(obj->base.write_domain & ~I915_GEM_GPU_DOMAINS);
        BUG_ON(!obj->active);
 
-       if (obj->pin_count) /* are we a framebuffer? */
-               intel_mark_fb_idle(obj);
-
        list_move_tail(&obj->mm_list, &dev_priv->mm.inactive_list);
 
        list_del_init(&obj->ring_list);

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 56c51ddf54ecfa714897e329b0a633fdfe1781de..0d45487040d256b6d780a9c9eb855a2a9ba1fe3f 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6725,11 +6725,6 @@ void intel_mark_busy(struct drm_device *dev)
 
 void intel_mark_idle(struct drm_device *dev)
 {
-}
-
-void intel_mark_fb_busy(struct drm_i915_gem_object *obj)
-{
-       struct drm_device *dev = obj->base.dev;
        struct drm_crtc *crtc;
 
        if (!i915_powersave)
@@ -6739,12 +6734,11 @@ void intel_mark_fb_busy(struct drm_i915_gem_object *obj)
                if (!crtc->fb)
                        continue;
 
-               if (to_intel_framebuffer(crtc->fb)->obj == obj)
-                       intel_increase_pllclock(crtc);
+               intel_decrease_pllclock(crtc);
        }
 }
 
-void intel_mark_fb_idle(struct drm_i915_gem_object *obj)
+void intel_mark_fb_busy(struct drm_i915_gem_object *obj)
 {
        struct drm_device *dev = obj->base.dev;
        struct drm_crtc *crtc;
@@ -6757,7 +6751,7 @@ void intel_mark_fb_idle(struct drm_i915_gem_object *obj)
                        continue;
 
                if (to_intel_framebuffer(crtc->fb)->obj == obj)
-                       intel_decrease_pllclock(crtc);
+                       intel_increase_pllclock(crtc);
        }
 }
 

diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index fcdfe42e434c3c29755d7ec0f753f90382cef120..13afb37d8deccb6c7f8b0a01556a7bde0053ea47 100644 (file)
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -452,9 +452,8 @@ extern bool intel_sdvo_init(struct drm_device *dev, uint32_t sdvo_reg,
 extern void intel_dvo_init(struct drm_device *dev);
 extern void intel_tv_init(struct drm_device *dev);
 extern void intel_mark_busy(struct drm_device *dev);
-extern void intel_mark_idle(struct drm_device *dev);
 extern void intel_mark_fb_busy(struct drm_i915_gem_object *obj);
-extern void intel_mark_fb_idle(struct drm_i915_gem_object *obj);
+extern void intel_mark_idle(struct drm_device *dev);
 extern bool intel_lvds_init(struct drm_device *dev);
 extern bool intel_is_dual_link_lvds(struct drm_device *dev);
 extern void intel_dp_init(struct drm_device *dev, int output_reg,