Merge tag 'drm-intel-fixes-2017-02-09' of git://anongit.freedesktop.org/git/drm-intel into drm-fixes

Hopefully final fixes for v4.10, about half of them stable material.

* tag 'drm-intel-fixes-2017-02-09' of git://anongit.freedesktop.org/git/drm-intel:
  drm/i915: Always convert incoming exec offsets to non-canonical
  drm/i915: Remove overzealous fence warn on runtime suspend
  drm/i915/bxt: Add MST support when do DPLL calculation
  drm/i915: don't warn about Skylake CPU - KabyPoint PCH combo
  drm/i915: fix i915 running as dom0 under Xen
  drm/i915: Flush untouched framebuffers before display on !llc
  drm/i915: fix use-after-free in page_flip_completed()

Author: airlied

drivers/gpu/drm/i915/i915_drv.c

@@ -213,7 +213,8 @@ static void intel_detect_pch(struct drm_device *dev)
 			} else if (id == INTEL_PCH_KBP_DEVICE_ID_TYPE) {
 				dev_priv->pch_type = PCH_KBP;
 				DRM_DEBUG_KMS("Found KabyPoint PCH\n");
-				WARN_ON(!IS_KABYLAKE(dev_priv));
+				WARN_ON(!IS_SKYLAKE(dev_priv) &&
+					!IS_KABYLAKE(dev_priv));
 			} else if ((id == INTEL_PCH_P2X_DEVICE_ID_TYPE) ||
 				   (id == INTEL_PCH_P3X_DEVICE_ID_TYPE) ||
 				   ((id == INTEL_PCH_QEMU_DEVICE_ID_TYPE) &&
@@ -2427,6 +2428,7 @@ static int intel_runtime_resume(struct device *kdev)
 	 * we can do is to hope that things will still work (and disable RPM).
 	 */
 	i915_gem_init_swizzling(dev_priv);
+	i915_gem_restore_fences(dev_priv);
 
 	intel_runtime_pm_enable_interrupts(dev_priv);
 

drivers/gpu/drm/i915/i915_gem.c

@@ -2010,8 +2010,16 @@ void i915_gem_runtime_suspend(struct drm_i915_private *dev_priv)
 	for (i = 0; i < dev_priv->num_fence_regs; i++) {
 		struct drm_i915_fence_reg *reg = &dev_priv->fence_regs[i];
 
-		if (WARN_ON(reg->pin_count))
-			continue;
+		/* Ideally we want to assert that the fence register is not
+		 * live at this point (i.e. that no piece of code will be
+		 * trying to write through fence + GTT, as that both violates
+		 * our tracking of activity and associated locking/barriers,
+		 * but also is illegal given that the hw is powered down).
+		 *
+		 * Previously we used reg->pin_count as a "liveness" indicator.
+		 * That is not sufficient, and we need a more fine-grained
+		 * tool if we want to have a sanity check here.
+		 */
 
 		if (!reg->vma)
 			continue;
@@ -3478,7 +3486,7 @@ 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) {
+	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);
 	}

drivers/gpu/drm/i915/i915_gem_execbuffer.c

@@ -1181,14 +1181,14 @@ validate_exec_list(struct drm_device *dev,
 			if (exec[i].offset !=
 			    gen8_canonical_addr(exec[i].offset & PAGE_MASK))
 				return -EINVAL;
-
-			/* From drm_mm perspective address space is continuous,
-			 * so from this point we're always using non-canonical
-			 * form internally.
-			 */
-			exec[i].offset = gen8_noncanonical_addr(exec[i].offset);
 		}
 
+		/* From drm_mm perspective address space is continuous,
+		 * so from this point we're always using non-canonical
+		 * form internally.
+		 */
+		exec[i].offset = gen8_noncanonical_addr(exec[i].offset);
+
 		if (exec[i].alignment && !is_power_of_2(exec[i].alignment))
 			return -EINVAL;
 

drivers/gpu/drm/i915/i915_gem_internal.c

@@ -66,8 +66,16 @@ i915_gem_object_get_pages_internal(struct drm_i915_gem_object *obj)
 
 	max_order = MAX_ORDER;
 #ifdef CONFIG_SWIOTLB
-	if (swiotlb_nr_tbl()) /* minimum max swiotlb size is IO_TLB_SEGSIZE */
-		max_order = min(max_order, ilog2(IO_TLB_SEGPAGES));
+	if (swiotlb_nr_tbl()) {
+		unsigned int max_segment;
+
+		max_segment = swiotlb_max_segment();
+		if (max_segment) {
+			max_segment = max_t(unsigned int, max_segment,
+					    PAGE_SIZE) >> PAGE_SHIFT;
+			max_order = min(max_order, ilog2(max_segment));
+		}
+	}
 #endif
 
 	gfp = GFP_KERNEL | __GFP_HIGHMEM | __GFP_RECLAIMABLE;

drivers/gpu/drm/i915/intel_display.c

@@ -4262,10 +4262,10 @@ static void page_flip_completed(struct intel_crtc *intel_crtc)
 	drm_crtc_vblank_put(&intel_crtc->base);
 
 	wake_up_all(&dev_priv->pending_flip_queue);
-	queue_work(dev_priv->wq, &work->unpin_work);
-
 	trace_i915_flip_complete(intel_crtc->plane,
 				 work->pending_flip_obj);
+
+	queue_work(dev_priv->wq, &work->unpin_work);
 }
 
 static int intel_crtc_wait_for_pending_flips(struct drm_crtc *crtc)

drivers/gpu/drm/i915/intel_dpll_mgr.c

@@ -1730,7 +1730,8 @@ bxt_get_dpll(struct intel_crtc *crtc,
 		return NULL;
 
 	if ((encoder->type == INTEL_OUTPUT_DP ||
-	     encoder->type == INTEL_OUTPUT_EDP) &&
+	     encoder->type == INTEL_OUTPUT_EDP ||
+	     encoder->type == INTEL_OUTPUT_DP_MST) &&
 	    !bxt_ddi_dp_set_dpll_hw_state(clock, &dpll_hw_state))
 		return NULL;