Merge tag 'drm-intel-fixes-2017-11-01' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

Fixes for Stable:

- Fix KBL Blank Screen (Jani)
- Fix FIFO Underrun on SNB (Maarten)

Other fixes:

- Fix GPU Hang on i915gm (Chris)
- Fix gem_tiled_pread_pwrite IGT case (Chris)
- Cancel modeset retry work during modeset clean-up (Manasi)

* tag 'drm-intel-fixes-2017-11-01' of git://anongit.freedesktop.org/drm/drm-intel:
  drm/i915: Check incoming alignment for unfenced buffers (on i915gm)
  drm/i915: Hold rcu_read_lock when iterating over the radixtree (vma idr)
  drm/i915: Hold rcu_read_lock when iterating over the radixtree (objects)
  drm/i915/edp: read edp display control registers unconditionally
  drm/i915: Do not rely on wm preservation for ILK watermarks
  drm/i915: Cancel the modeset retry work during modeset cleanup

drivers/gpu/drm/i915/i915_gem.c

@@ -2214,8 +2214,10 @@ static void __i915_gem_object_reset_page_iter(struct drm_i915_gem_object *obj)
 	struct radix_tree_iter iter;
 	void __rcu **slot;
 
+	rcu_read_lock();
 	radix_tree_for_each_slot(slot, &obj->mm.get_page.radix, &iter, 0)
 		radix_tree_delete(&obj->mm.get_page.radix, iter.index);
+	rcu_read_unlock();
 }
 
 void __i915_gem_object_put_pages(struct drm_i915_gem_object *obj,

drivers/gpu/drm/i915/i915_gem_context.c

@@ -104,6 +104,7 @@ static void lut_close(struct i915_gem_context *ctx)
 		kmem_cache_free(ctx->i915->luts, lut);
 	}
 
+	rcu_read_lock();
 	radix_tree_for_each_slot(slot, &ctx->handles_vma, &iter, 0) {
 		struct i915_vma *vma = rcu_dereference_raw(*slot);
 		struct drm_i915_gem_object *obj = vma->obj;
@@ -115,6 +116,7 @@ static void lut_close(struct i915_gem_context *ctx)
 
 		__i915_gem_object_release_unless_active(obj);
 	}
+	rcu_read_unlock();
 }
 
 static void i915_gem_context_free(struct i915_gem_context *ctx)

drivers/gpu/drm/i915/i915_gem_execbuffer.c

@@ -337,6 +337,10 @@ eb_vma_misplaced(const struct drm_i915_gem_exec_object2 *entry,
 	    (vma->node.start + vma->node.size - 1) >> 32)
 		return true;
 
+	if (flags & __EXEC_OBJECT_NEEDS_MAP &&
+	    !i915_vma_is_map_and_fenceable(vma))
+		return true;
+
 	return false;
 }
 

drivers/gpu/drm/i915/intel_display.c

@@ -15227,6 +15227,23 @@ void intel_connector_unregister(struct drm_connector *connector)
 	intel_panel_destroy_backlight(connector);
 }
 
+static void intel_hpd_poll_fini(struct drm_device *dev)
+{
+	struct intel_connector *connector;
+	struct drm_connector_list_iter conn_iter;
+
+	/* First disable polling... */
+	drm_kms_helper_poll_fini(dev);
+
+	/* Then kill the work that may have been queued by hpd. */
+	drm_connector_list_iter_begin(dev, &conn_iter);
+	for_each_intel_connector_iter(connector, &conn_iter) {
+		if (connector->modeset_retry_work.func)
+			cancel_work_sync(&connector->modeset_retry_work);
+	}
+	drm_connector_list_iter_end(&conn_iter);
+}
+
 void intel_modeset_cleanup(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = to_i915(dev);
@@ -15247,7 +15264,7 @@ void intel_modeset_cleanup(struct drm_device *dev)
 	 * Due to the hpd irq storm handling the hotplug work can re-arm the
 	 * poll handlers. Hence disable polling after hpd handling is shut down.
 	 */
-	drm_kms_helper_poll_fini(dev);
+	intel_hpd_poll_fini(dev);
 
 	/* poll work can call into fbdev, hence clean that up afterwards */
 	intel_fbdev_fini(dev_priv);

drivers/gpu/drm/i915/intel_dp.c

@@ -3731,9 +3731,16 @@ intel_edp_init_dpcd(struct intel_dp *intel_dp)
 
 	}
 
-	/* Read the eDP Display control capabilities registers */
-	if ((intel_dp->dpcd[DP_EDP_CONFIGURATION_CAP] & DP_DPCD_DISPLAY_CONTROL_CAPABLE) &&
-	    drm_dp_dpcd_read(&intel_dp->aux, DP_EDP_DPCD_REV,
+	/*
+	 * Read the eDP display control registers.
+	 *
+	 * Do this independent of DP_DPCD_DISPLAY_CONTROL_CAPABLE bit in
+	 * DP_EDP_CONFIGURATION_CAP, because some buggy displays do not have it
+	 * set, but require eDP 1.4+ detection (e.g. for supported link rates
+	 * method). The display control registers should read zero if they're
+	 * not supported anyway.
+	 */
+	if (drm_dp_dpcd_read(&intel_dp->aux, DP_EDP_DPCD_REV,
 			     intel_dp->edp_dpcd, sizeof(intel_dp->edp_dpcd)) ==
 			     sizeof(intel_dp->edp_dpcd))
 		DRM_DEBUG_KMS("EDP DPCD : %*ph\n", (int) sizeof(intel_dp->edp_dpcd),

drivers/gpu/drm/i915/intel_drv.h

@@ -496,7 +496,6 @@ struct intel_crtc_scaler_state {
 
 struct intel_pipe_wm {
 	struct intel_wm_level wm[5];
-	struct intel_wm_level raw_wm[5];
 	uint32_t linetime;
 	bool fbc_wm_enabled;
 	bool pipe_enabled;

drivers/gpu/drm/i915/intel_pm.c

@@ -2716,9 +2716,9 @@ static void ilk_compute_wm_level(const struct drm_i915_private *dev_priv,
 				 const struct intel_crtc *intel_crtc,
 				 int level,
 				 struct intel_crtc_state *cstate,
-				 struct intel_plane_state *pristate,
-				 struct intel_plane_state *sprstate,
-				 struct intel_plane_state *curstate,
+				 const struct intel_plane_state *pristate,
+				 const struct intel_plane_state *sprstate,
+				 const struct intel_plane_state *curstate,
 				 struct intel_wm_level *result)
 {
 	uint16_t pri_latency = dev_priv->wm.pri_latency[level];
@@ -3038,28 +3038,24 @@ static int ilk_compute_pipe_wm(struct intel_crtc_state *cstate)
 	struct intel_pipe_wm *pipe_wm;
 	struct drm_device *dev = state->dev;
 	const struct drm_i915_private *dev_priv = to_i915(dev);
-	struct intel_plane *intel_plane;
-	struct intel_plane_state *pristate = NULL;
-	struct intel_plane_state *sprstate = NULL;
-	struct intel_plane_state *curstate = NULL;
+	struct drm_plane *plane;
+	const struct drm_plane_state *plane_state;
+	const struct intel_plane_state *pristate = NULL;
+	const struct intel_plane_state *sprstate = NULL;
+	const struct intel_plane_state *curstate = NULL;
 	int level, max_level = ilk_wm_max_level(dev_priv), usable_level;
 	struct ilk_wm_maximums max;
 
 	pipe_wm = &cstate->wm.ilk.optimal;
 
-	for_each_intel_plane_on_crtc(dev, intel_crtc, intel_plane) {
-		struct intel_plane_state *ps;
+	drm_atomic_crtc_state_for_each_plane_state(plane, plane_state, &cstate->base) {
+		const struct intel_plane_state *ps = to_intel_plane_state(plane_state);
 
-		ps = intel_atomic_get_existing_plane_state(state,
-							   intel_plane);
-		if (!ps)
-			continue;
-
-		if (intel_plane->base.type == DRM_PLANE_TYPE_PRIMARY)
+		if (plane->type == DRM_PLANE_TYPE_PRIMARY)
 			pristate = ps;
-		else if (intel_plane->base.type == DRM_PLANE_TYPE_OVERLAY)
+		else if (plane->type == DRM_PLANE_TYPE_OVERLAY)
 			sprstate = ps;
-		else if (intel_plane->base.type == DRM_PLANE_TYPE_CURSOR)
+		else if (plane->type == DRM_PLANE_TYPE_CURSOR)
 			curstate = ps;
 	}
 
@@ -3081,11 +3077,9 @@ static int ilk_compute_pipe_wm(struct intel_crtc_state *cstate)
 	if (pipe_wm->sprites_scaled)
 		usable_level = 0;
 
-	ilk_compute_wm_level(dev_priv, intel_crtc, 0, cstate,
-			     pristate, sprstate, curstate, &pipe_wm->raw_wm[0]);
-
 	memset(&pipe_wm->wm, 0, sizeof(pipe_wm->wm));
-	pipe_wm->wm[0] = pipe_wm->raw_wm[0];
+	ilk_compute_wm_level(dev_priv, intel_crtc, 0, cstate,
+			     pristate, sprstate, curstate, &pipe_wm->wm[0]);
 
 	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
 		pipe_wm->linetime = hsw_compute_linetime_wm(cstate);
@@ -3095,8 +3089,8 @@ static int ilk_compute_pipe_wm(struct intel_crtc_state *cstate)
 
 	ilk_compute_wm_reg_maximums(dev_priv, 1, &max);
 
-	for (level = 1; level <= max_level; level++) {
-		struct intel_wm_level *wm = &pipe_wm->raw_wm[level];
+	for (level = 1; level <= usable_level; level++) {
+		struct intel_wm_level *wm = &pipe_wm->wm[level];
 
 		ilk_compute_wm_level(dev_priv, intel_crtc, level, cstate,
 				     pristate, sprstate, curstate, wm);
@@ -3106,13 +3100,10 @@ static int ilk_compute_pipe_wm(struct intel_crtc_state *cstate)
 		 * register maximums since such watermarks are
 		 * always invalid.
 		 */
-		if (level > usable_level)
-			continue;
-
-		if (ilk_validate_wm_level(level, &max, wm))
-			pipe_wm->wm[level] = *wm;
-		else
-			usable_level = level;
+		if (!ilk_validate_wm_level(level, &max, wm)) {
+			memset(wm, 0, sizeof(*wm));
+			break;
+		}
 	}
 
 	return 0;