drm/i915: Amalgamate flushing of display objects

We have three different paths by which userspace wants to flush the
display plane (i.e. objects with obj->pin_display). Use a common helper
to identify those paths and to simplify a later change.

v2: Include the conditional in the name, i915_gem_object_flush_if_display

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170222114049.28456-3-chris@chris-wilson.co.uk

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 312154b..c9ee2a9 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1613,23 +1613,16 @@ i915_gem_sw_finish_ioctl(struct drm_device *dev, void *data,
 {
        struct drm_i915_gem_sw_finish *args = data;
        struct drm_i915_gem_object *obj;
-       int err = 0;
 
        obj = i915_gem_object_lookup(file, args->handle);
        if (!obj)
                return -ENOENT;
 
        /* Pinned buffers may be scanout, so flush the cache */
-       if (READ_ONCE(obj->pin_display)) {
-               err = i915_mutex_lock_interruptible(dev);
-               if (!err) {
-                       i915_gem_object_flush_cpu_write_domain(obj);
-                       mutex_unlock(&dev->struct_mutex);
-               }
-       }
-
+       i915_gem_object_flush_if_display(obj);
        i915_gem_object_put(obj);
-       return err;
+
+       return 0;
 }
 
 /**
@@ -3221,6 +3214,27 @@ i915_gem_object_flush_cpu_write_domain(struct drm_i915_gem_object *obj)
        obj->base.write_domain = 0;
 }
 
+static void __i915_gem_object_flush_for_display(struct drm_i915_gem_object *obj)
+{
+       if (obj->base.write_domain != I915_GEM_DOMAIN_CPU && !obj->cache_dirty)
+               return;
+
+       i915_gem_clflush_object(obj, true);
+       intel_fb_obj_flush(obj, false, ORIGIN_CPU);
+
+       obj->base.write_domain = 0;
+}
+
+void i915_gem_object_flush_if_display(struct drm_i915_gem_object *obj)
+{
+       if (!READ_ONCE(obj->pin_display))
+               return;
+
+       mutex_lock(&obj->base.dev->struct_mutex);
+       __i915_gem_object_flush_for_display(obj);
+       mutex_unlock(&obj->base.dev->struct_mutex);
+}
+
 /**
  * Moves a single object to the GTT read, and possibly write domain.
  * @obj: object to act on
@@ -3575,15 +3589,12 @@ i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj,
        vma->display_alignment = max_t(u64, vma->display_alignment, alignment);
 
        /* Treat this as an end-of-frame, like intel_user_framebuffer_dirty() */
-       if (obj->cache_dirty || obj->base.write_domain == I915_GEM_DOMAIN_CPU) {
-               i915_gem_clflush_object(obj, true);
-               intel_fb_obj_flush(obj, false, ORIGIN_DIRTYFB);
-       }
+       __i915_gem_object_flush_for_display(obj);
+       intel_fb_obj_flush(obj, false, ORIGIN_DIRTYFB);
 
        /* It should now be out of any other write domains, and we can update
         * the domain values for our changes.
         */
-       obj->base.write_domain = 0;
        obj->base.read_domains |= I915_GEM_DOMAIN_GTT;
 
        return vma;

diff --git a/drivers/gpu/drm/i915/i915_gem_object.h b/drivers/gpu/drm/i915/i915_gem_object.h
index ef4893a..2fb30a5 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem_object.h
+++ b/drivers/gpu/drm/i915/i915_gem_object.h
@@ -364,5 +364,7 @@ i915_gem_object_last_write_engine(struct drm_i915_gem_object *obj)
        return engine;
 }
 
+void i915_gem_object_flush_if_display(struct drm_i915_gem_object *obj);
+
 #endif
 

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index e1e828a..4d67cbb 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -14278,15 +14278,10 @@ static int intel_user_framebuffer_dirty(struct drm_framebuffer *fb,
                                        struct drm_clip_rect *clips,
                                        unsigned num_clips)
 {
-       struct drm_device *dev = fb->dev;
-       struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
-       struct drm_i915_gem_object *obj = intel_fb->obj;
+       struct drm_i915_gem_object *obj = intel_fb_obj(fb);
 
-       mutex_lock(&dev->struct_mutex);
-       if (obj->pin_display && obj->cache_dirty)
-               i915_gem_clflush_object(obj, true);
+       i915_gem_object_flush_if_display(obj);
        intel_fb_obj_flush(obj, false, ORIGIN_DIRTYFB);
-       mutex_unlock(&dev->struct_mutex);
 
        return 0;
 }