Merge tag 'v5.0.7' into dev-5.0

This is the 5.0.7 stable release

Signed-off-by: Joel Stanley <joel@jms.id.au>

15 files changed, 147 insertions, 76 deletions

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 636d14a60952..83c8a0407537 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -886,6 +886,7 @@ static void emulated_link_detect(struct dc_link *link)
 		return;
 	}
 
+	/* dc_sink_create returns a new reference */
 	link->local_sink = sink;
 
 	edid_status = dm_helpers_read_local_edid(
@@ -952,6 +953,8 @@ static int dm_resume(void *handle)
 		if (aconnector->fake_enable && aconnector->dc_link->local_sink)
 			aconnector->fake_enable = false;
 
+		if (aconnector->dc_sink)
+			dc_sink_release(aconnector->dc_sink);
 		aconnector->dc_sink = NULL;
 		amdgpu_dm_update_connector_after_detect(aconnector);
 		mutex_unlock(&aconnector->hpd_lock);
@@ -1061,6 +1064,8 @@ amdgpu_dm_update_connector_after_detect(struct amdgpu_dm_connector *aconnector)
 
 
 	sink = aconnector->dc_link->local_sink;
+	if (sink)
+		dc_sink_retain(sink);
 
 	/*
 	 * Edid mgmt connector gets first update only in mode_valid hook and then
@@ -1085,21 +1090,24 @@ amdgpu_dm_update_connector_after_detect(struct amdgpu_dm_connector *aconnector)
 				 * to it anymore after disconnect, so on next crtc to connector
 				 * reshuffle by UMD we will get into unwanted dc_sink release
 				 */
-				if (aconnector->dc_sink != aconnector->dc_em_sink)
-					dc_sink_release(aconnector->dc_sink);
+				dc_sink_release(aconnector->dc_sink);
 			}
 			aconnector->dc_sink = sink;
+			dc_sink_retain(aconnector->dc_sink);
 			amdgpu_dm_update_freesync_caps(connector,
 					aconnector->edid);
 		} else {
 			amdgpu_dm_update_freesync_caps(connector, NULL);
-			if (!aconnector->dc_sink)
+			if (!aconnector->dc_sink) {
 				aconnector->dc_sink = aconnector->dc_em_sink;
-			else if (aconnector->dc_sink != aconnector->dc_em_sink)
 				dc_sink_retain(aconnector->dc_sink);
+			}
 		}
 
 		mutex_unlock(&dev->mode_config.mutex);
+
+		if (sink)
+			dc_sink_release(sink);
 		return;
 	}
 
@@ -1107,8 +1115,10 @@ amdgpu_dm_update_connector_after_detect(struct amdgpu_dm_connector *aconnector)
 	 * TODO: temporary guard to look for proper fix
 	 * if this sink is MST sink, we should not do anything
 	 */
-	if (sink && sink->sink_signal == SIGNAL_TYPE_DISPLAY_PORT_MST)
+	if (sink && sink->sink_signal == SIGNAL_TYPE_DISPLAY_PORT_MST) {
+		dc_sink_release(sink);
 		return;
+	}
 
 	if (aconnector->dc_sink == sink) {
 		/*
@@ -1117,6 +1127,8 @@ amdgpu_dm_update_connector_after_detect(struct amdgpu_dm_connector *aconnector)
 		 */
 		DRM_DEBUG_DRIVER("DCHPD: connector_id=%d: dc_sink didn't change.\n",
 				aconnector->connector_id);
+		if (sink)
+			dc_sink_release(sink);
 		return;
 	}
 
@@ -1138,6 +1150,7 @@ amdgpu_dm_update_connector_after_detect(struct amdgpu_dm_connector *aconnector)
 			amdgpu_dm_update_freesync_caps(connector, NULL);
 
 		aconnector->dc_sink = sink;
+		dc_sink_retain(aconnector->dc_sink);
 		if (sink->dc_edid.length == 0) {
 			aconnector->edid = NULL;
 			drm_dp_cec_unset_edid(&aconnector->dm_dp_aux.aux);
@@ -1158,11 +1171,15 @@ amdgpu_dm_update_connector_after_detect(struct amdgpu_dm_connector *aconnector)
 		amdgpu_dm_update_freesync_caps(connector, NULL);
 		drm_connector_update_edid_property(connector, NULL);
 		aconnector->num_modes = 0;
+		dc_sink_release(aconnector->dc_sink);
 		aconnector->dc_sink = NULL;
 		aconnector->edid = NULL;
 	}
 
 	mutex_unlock(&dev->mode_config.mutex);
+
+	if (sink)
+		dc_sink_release(sink);
 }
 
 static void handle_hpd_irq(void *param)
@@ -2908,6 +2925,7 @@ create_stream_for_sink(struct amdgpu_dm_connector *aconnector,
 		}
 	} else {
 		sink = aconnector->dc_sink;
+		dc_sink_retain(sink);
 	}
 
 	stream = dc_create_stream_for_sink(sink);
@@ -2974,8 +2992,7 @@ create_stream_for_sink(struct amdgpu_dm_connector *aconnector,
 		stream->ignore_msa_timing_param = true;
 
 finish:
-	if (sink && sink->sink_signal == SIGNAL_TYPE_VIRTUAL && aconnector->base.force != DRM_FORCE_ON)
-		dc_sink_release(sink);
+	dc_sink_release(sink);
 
 	return stream;
 }
@@ -3233,6 +3250,14 @@ static void amdgpu_dm_connector_destroy(struct drm_connector *connector)
 		dm->backlight_dev = NULL;
 	}
 #endif
+
+	if (aconnector->dc_em_sink)
+		dc_sink_release(aconnector->dc_em_sink);
+	aconnector->dc_em_sink = NULL;
+	if (aconnector->dc_sink)
+		dc_sink_release(aconnector->dc_sink);
+	aconnector->dc_sink = NULL;
+
 	drm_dp_cec_unregister_connector(&aconnector->dm_dp_aux.aux);
 	drm_connector_unregister(connector);
 	drm_connector_cleanup(connector);
@@ -3330,10 +3355,12 @@ static void create_eml_sink(struct amdgpu_dm_connector *aconnector)
 		(edid->extensions + 1) * EDID_LENGTH,
 		&init_params);
 
-	if (aconnector->base.force == DRM_FORCE_ON)
+	if (aconnector->base.force == DRM_FORCE_ON) {
 		aconnector->dc_sink = aconnector->dc_link->local_sink ?
 		aconnector->dc_link->local_sink :
 		aconnector->dc_em_sink;
+		dc_sink_retain(aconnector->dc_sink);
+	}
 }
 
 static void handle_edid_mgmt(struct amdgpu_dm_connector *aconnector)
@@ -4948,7 +4975,8 @@ static void amdgpu_dm_commit_planes(struct drm_atomic_state *state,
 static void amdgpu_dm_crtc_copy_transient_flags(struct drm_crtc_state *crtc_state,
 						struct dc_stream_state *stream_state)
 {
-	stream_state->mode_changed = crtc_state->mode_changed;
+	stream_state->mode_changed =
+		crtc_state->mode_changed || crtc_state->active_changed;
 }
 
 static int amdgpu_dm_atomic_commit(struct drm_device *dev,
@@ -4969,10 +4997,22 @@ static int amdgpu_dm_atomic_commit(struct drm_device *dev,
 	 */
 	for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
 		struct dm_crtc_state *dm_old_crtc_state = to_dm_crtc_state(old_crtc_state);
+		struct dm_crtc_state *dm_new_crtc_state = to_dm_crtc_state(new_crtc_state);
 		struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
 
-		if (drm_atomic_crtc_needs_modeset(new_crtc_state) && dm_old_crtc_state->stream)
+		if (drm_atomic_crtc_needs_modeset(new_crtc_state)
+		    && dm_old_crtc_state->stream) {
+			/*
+			 * CRC capture was enabled but not disabled.
+			 * Release the vblank reference.
+			 */
+			if (dm_new_crtc_state->crc_enabled) {
+				drm_crtc_vblank_put(crtc);
+				dm_new_crtc_state->crc_enabled = false;
+			}
+
 			manage_dm_interrupts(adev, acrtc, false);
+		}
 	}
 	/*
 	 * Add check here for SoC's that support hardware cursor plane, to
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.c
index f088ac585978..26b651148c67 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.c
@@ -66,6 +66,7 @@ int amdgpu_dm_crtc_set_crc_source(struct drm_crtc *crtc, const char *src_name)
 {
 	struct dm_crtc_state *crtc_state = to_dm_crtc_state(crtc->state);
 	struct dc_stream_state *stream_state = crtc_state->stream;
+	bool enable;
 
 	enum amdgpu_dm_pipe_crc_source source = dm_parse_crc_source(src_name);
 
@@ -80,28 +81,27 @@ int amdgpu_dm_crtc_set_crc_source(struct drm_crtc *crtc, const char *src_name)
 		return -EINVAL;
 	}
 
+	enable = (source == AMDGPU_DM_PIPE_CRC_SOURCE_AUTO);
+
+	if (!dc_stream_configure_crc(stream_state->ctx->dc, stream_state,
+				     enable, enable))
+		return -EINVAL;
+
 	/* When enabling CRC, we should also disable dithering. */
-	if (source == AMDGPU_DM_PIPE_CRC_SOURCE_AUTO) {
-		if (dc_stream_configure_crc(stream_state->ctx->dc,
-					    stream_state,
-					    true, true)) {
-			crtc_state->crc_enabled = true;
-			dc_stream_set_dither_option(stream_state,
-						    DITHER_OPTION_TRUN8);
-		}
-		else
-			return -EINVAL;
-	} else {
-		if (dc_stream_configure_crc(stream_state->ctx->dc,
-					    stream_state,
-					    false, false)) {
-			crtc_state->crc_enabled = false;
-			dc_stream_set_dither_option(stream_state,
-						    DITHER_OPTION_DEFAULT);
-		}
-		else
-			return -EINVAL;
-	}
+	dc_stream_set_dither_option(stream_state,
+				    enable ? DITHER_OPTION_TRUN8
+					   : DITHER_OPTION_DEFAULT);
+
+	/*
+	 * Reading the CRC requires the vblank interrupt handler to be
+	 * enabled. Keep a reference until CRC capture stops.
+	 */
+	if (!crtc_state->crc_enabled && enable)
+		drm_crtc_vblank_get(crtc);
+	else if (crtc_state->crc_enabled && !enable)
+		drm_crtc_vblank_put(crtc);
+
+	crtc_state->crc_enabled = enable;
 
 	/* Reset crc_skipped on dm state */
 	crtc_state->crc_skip_count = 0;
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
index 1b0d209d8367..3b95a637b508 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
@@ -239,6 +239,7 @@ static int dm_dp_mst_get_modes(struct drm_connector *connector)
 			&init_params);
 
 		dc_sink->priv = aconnector;
+		/* dc_link_add_remote_sink returns a new reference */
 		aconnector->dc_sink = dc_sink;
 
 		if (aconnector->dc_sink)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index 5fd52094d459..1f92e7e8e3d3 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -1078,6 +1078,9 @@ static enum dc_status dc_commit_state_no_check(struct dc *dc, struct dc_state *c
 	/* pplib is notified if disp_num changed */
 	dc->hwss.optimize_bandwidth(dc, context);
 
+	for (i = 0; i < context->stream_count; i++)
+		context->streams[i]->mode_changed = false;
+
 	dc_release_state(dc->current_state);
 
 	dc->current_state = context;
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
index b0265dbebd4c..583eb367850f 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -792,6 +792,7 @@ bool dc_link_detect(struct dc_link *link, enum dc_detect_reason reason)
 		sink->dongle_max_pix_clk = sink_caps.max_hdmi_pixel_clock;
 		sink->converter_disable_audio = converter_disable_audio;
 
+		/* dc_sink_create returns a new reference */
 		link->local_sink = sink;
 
 		edid_status = dm_helpers_read_local_edid(
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
index 41883c981789..a684b38332ac 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
@@ -2334,9 +2334,10 @@ static void dcn10_apply_ctx_for_surface(
 			}
 		}
 
-		if (!pipe_ctx->plane_state &&
-			old_pipe_ctx->plane_state &&
-			old_pipe_ctx->stream_res.tg == tg) {
+		if ((!pipe_ctx->plane_state ||
+		     pipe_ctx->stream_res.tg != old_pipe_ctx->stream_res.tg) &&
+		    old_pipe_ctx->plane_state &&
+		    old_pipe_ctx->stream_res.tg == tg) {
 
 			dc->hwss.plane_atomic_disconnect(dc, old_pipe_ctx);
 			removed_pipe[i] = true;
diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index 529414556962..1a244c53252c 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -3286,6 +3286,7 @@ static int drm_dp_mst_i2c_xfer(struct i2c_adapter *adapter, struct i2c_msg *msgs
 		msg.u.i2c_read.transactions[i].i2c_dev_id = msgs[i].addr;
 		msg.u.i2c_read.transactions[i].num_bytes = msgs[i].len;
 		msg.u.i2c_read.transactions[i].bytes = msgs[i].buf;
+		msg.u.i2c_read.transactions[i].no_stop_bit = !(msgs[i].flags & I2C_M_STOP);
 	}
 	msg.u.i2c_read.read_i2c_device_id = msgs[num - 1].addr;
 	msg.u.i2c_read.num_bytes_read = msgs[num - 1].len;
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index 70fc8e356b18..edd8cb497f3b 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -2891,7 +2891,7 @@ int drm_fb_helper_fbdev_setup(struct drm_device *dev,
 	return 0;
 
 err_drm_fb_helper_fini:
-	drm_fb_helper_fini(fb_helper);
+	drm_fb_helper_fbdev_teardown(dev);
 
 	return ret;
 }
diff --git a/drivers/gpu/drm/drm_mode_object.c b/drivers/gpu/drm/drm_mode_object.c
index 004191d01772..15b919f90c5a 100644
--- a/drivers/gpu/drm/drm_mode_object.c
+++ b/drivers/gpu/drm/drm_mode_object.c
@@ -465,6 +465,7 @@ static int set_property_atomic(struct drm_mode_object *obj,
 
 	drm_modeset_acquire_init(&ctx, 0);
 	state->acquire_ctx = &ctx;
+
 retry:
 	if (prop == state->dev->mode_config.dpms_property) {
 		if (obj->type != DRM_MODE_OBJECT_CONNECTOR) {
diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c
index 5f650d8fc66b..4cfb56893b7f 100644
--- a/drivers/gpu/drm/drm_plane.c
+++ b/drivers/gpu/drm/drm_plane.c
@@ -220,6 +220,9 @@ int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane,
 			format_modifier_count++;
 	}
 
+	if (format_modifier_count)
+		config->allow_fb_modifiers = true;
+
 	plane->modifier_count = format_modifier_count;
 	plane->modifiers = kmalloc_array(format_modifier_count,
 					 sizeof(format_modifiers[0]),
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
index cb307a2abf06..7316b4ab1b85 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
@@ -23,11 +23,14 @@ struct dpu_mdss {
 	struct dpu_irq_controller irq_controller;
 };
 
-static irqreturn_t dpu_mdss_irq(int irq, void *arg)
+static void dpu_mdss_irq(struct irq_desc *desc)
 {
-	struct dpu_mdss *dpu_mdss = arg;
+	struct dpu_mdss *dpu_mdss = irq_desc_get_handler_data(desc);
+	struct irq_chip *chip = irq_desc_get_chip(desc);
 	u32 interrupts;
 
+	chained_irq_enter(chip, desc);
+
 	interrupts = readl_relaxed(dpu_mdss->mmio + HW_INTR_STATUS);
 
 	while (interrupts) {
@@ -39,20 +42,20 @@ static irqreturn_t dpu_mdss_irq(int irq, void *arg)
 					   hwirq);
 		if (mapping == 0) {
 			DRM_ERROR("couldn't find irq mapping for %lu\n", hwirq);
-			return IRQ_NONE;
+			break;
 		}
 
 		rc = generic_handle_irq(mapping);
 		if (rc < 0) {
 			DRM_ERROR("handle irq fail: irq=%lu mapping=%u rc=%d\n",
 				  hwirq, mapping, rc);
-			return IRQ_NONE;
+			break;
 		}
 
 		interrupts &= ~(1 << hwirq);
 	}
 
-	return IRQ_HANDLED;
+	chained_irq_exit(chip, desc);
 }
 
 static void dpu_mdss_irq_mask(struct irq_data *irqd)
@@ -83,16 +86,16 @@ static struct irq_chip dpu_mdss_irq_chip = {
 	.irq_unmask = dpu_mdss_irq_unmask,
 };
 
+static struct lock_class_key dpu_mdss_lock_key, dpu_mdss_request_key;
+
 static int dpu_mdss_irqdomain_map(struct irq_domain *domain,
 		unsigned int irq, irq_hw_number_t hwirq)
 {
 	struct dpu_mdss *dpu_mdss = domain->host_data;
-	int ret;
 
+	irq_set_lockdep_class(irq, &dpu_mdss_lock_key, &dpu_mdss_request_key);
 	irq_set_chip_and_handler(irq, &dpu_mdss_irq_chip, handle_level_irq);
-	ret = irq_set_chip_data(irq, dpu_mdss);
-
-	return ret;
+	return irq_set_chip_data(irq, dpu_mdss);
 }
 
 static const struct irq_domain_ops dpu_mdss_irqdomain_ops = {
@@ -159,11 +162,13 @@ static void dpu_mdss_destroy(struct drm_device *dev)
 	struct msm_drm_private *priv = dev->dev_private;
 	struct dpu_mdss *dpu_mdss = to_dpu_mdss(priv->mdss);
 	struct dss_module_power *mp = &dpu_mdss->mp;
+	int irq;
 
 	pm_runtime_suspend(dev->dev);
 	pm_runtime_disable(dev->dev);
 	_dpu_mdss_irq_domain_fini(dpu_mdss);
-	free_irq(platform_get_irq(pdev, 0), dpu_mdss);
+	irq = platform_get_irq(pdev, 0);
+	irq_set_chained_handler_and_data(irq, NULL, NULL);
 	msm_dss_put_clk(mp->clk_config, mp->num_clk);
 	devm_kfree(&pdev->dev, mp->clk_config);
 
@@ -187,6 +192,7 @@ int dpu_mdss_init(struct drm_device *dev)
 	struct dpu_mdss *dpu_mdss;
 	struct dss_module_power *mp;
 	int ret = 0;
+	int irq;
 
 	dpu_mdss = devm_kzalloc(dev->dev, sizeof(*dpu_mdss), GFP_KERNEL);
 	if (!dpu_mdss)
@@ -219,12 +225,12 @@ int dpu_mdss_init(struct drm_device *dev)
 	if (ret)
 		goto irq_domain_error;
 
-	ret = request_irq(platform_get_irq(pdev, 0),
-			dpu_mdss_irq, 0, "dpu_mdss_isr", dpu_mdss);
-	if (ret) {
-		DPU_ERROR("failed to init irq: %d\n", ret);
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
 		goto irq_error;
-	}
+
+	irq_set_chained_handler_and_data(irq, dpu_mdss_irq,
+					 dpu_mdss);
 
 	pm_runtime_enable(dev->dev);
 
diff --git a/drivers/gpu/drm/nouveau/dispnv04/tvnv17.c b/drivers/gpu/drm/nouveau/dispnv04/tvnv17.c
index 6a4ca139cf5d..8fd8124d72ba 100644
--- a/drivers/gpu/drm/nouveau/dispnv04/tvnv17.c
+++ b/drivers/gpu/drm/nouveau/dispnv04/tvnv17.c
@@ -750,7 +750,9 @@ static int nv17_tv_set_property(struct drm_encoder *encoder,
 		/* Disable the crtc to ensure a full modeset is
 		 * performed whenever it's turned on again. */
 		if (crtc)
-			drm_crtc_force_disable(crtc);
+			drm_crtc_helper_set_mode(crtc, &crtc->mode,
+						 crtc->x, crtc->y,
+						 crtc->primary->fb);
 	}
 
 	return 0;
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
index 9c7007d45408..f9a90ff24e6d 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
@@ -331,6 +331,7 @@ static int rcar_du_encoders_init_one(struct rcar_du_device *rcdu,
 		dev_dbg(rcdu->dev,
 			"connected entity %pOF is disabled, skipping\n",
 			entity);
+		of_node_put(entity);
 		return -ENODEV;
 	}
 
@@ -366,6 +367,7 @@ static int rcar_du_encoders_init_one(struct rcar_du_device *rcdu,
 		dev_warn(rcdu->dev,
 			 "no encoder found for endpoint %pOF, skipping\n",
 			 ep->local_node);
+		of_node_put(entity);
 		return -ENODEV;
 	}
 
diff --git a/drivers/gpu/drm/scheduler/sched_entity.c b/drivers/gpu/drm/scheduler/sched_entity.c
index e2942c9a11a7..35ddbec1375a 100644
--- a/drivers/gpu/drm/scheduler/sched_entity.c
+++ b/drivers/gpu/drm/scheduler/sched_entity.c
@@ -52,12 +52,12 @@ int drm_sched_entity_init(struct drm_sched_entity *entity,
 {
 	int i;
 
-	if (!(entity && rq_list && num_rq_list > 0 && rq_list[0]))
+	if (!(entity && rq_list && (num_rq_list == 0 || rq_list[0])))
 		return -EINVAL;
 
 	memset(entity, 0, sizeof(struct drm_sched_entity));
 	INIT_LIST_HEAD(&entity->list);
-	entity->rq = rq_list[0];
+	entity->rq = NULL;
 	entity->guilty = guilty;
 	entity->num_rq_list = num_rq_list;
 	entity->rq_list = kcalloc(num_rq_list, sizeof(struct drm_sched_rq *),
@@ -67,6 +67,10 @@ int drm_sched_entity_init(struct drm_sched_entity *entity,
 
 	for (i = 0; i < num_rq_list; ++i)
 		entity->rq_list[i] = rq_list[i];
+
+	if (num_rq_list)
+		entity->rq = rq_list[0];
+
 	entity->last_scheduled = NULL;
 
 	spin_lock_init(&entity->rq_lock);
@@ -165,6 +169,9 @@ long drm_sched_entity_flush(struct drm_sched_entity *entity, long timeout)
 	struct task_struct *last_user;
 	long ret = timeout;
 
+	if (!entity->rq)
+		return 0;
+
 	sched = entity->rq->sched;
 	/**
 	 * The client will not queue more IBs during this fini, consume existing
@@ -264,20 +271,24 @@ static void drm_sched_entity_kill_jobs(struct drm_sched_entity *entity)
  */
 void drm_sched_entity_fini(struct drm_sched_entity *entity)
 {
-	struct drm_gpu_scheduler *sched;
+	struct drm_gpu_scheduler *sched = NULL;
 
-	sched = entity->rq->sched;
-	drm_sched_rq_remove_entity(entity->rq, entity);
+	if (entity->rq) {
+		sched = entity->rq->sched;
+		drm_sched_rq_remove_entity(entity->rq, entity);
+	}
 
 	/* Consumption of existing IBs wasn't completed. Forcefully
 	 * remove them here.
 	 */
 	if (spsc_queue_peek(&entity->job_queue)) {
-		/* Park the kernel for a moment to make sure it isn't processing
-		 * our enity.
-		 */
-		kthread_park(sched->thread);
-		kthread_unpark(sched->thread);
+		if (sched) {
+			/* Park the kernel for a moment to make sure it isn't processing
+			 * our enity.
+			 */
+			kthread_park(sched->thread);
+			kthread_unpark(sched->thread);
+		}
 		if (entity->dependency) {
 			dma_fence_remove_callback(entity->dependency,
 						  &entity->cb);
@@ -362,9 +373,11 @@ void drm_sched_entity_set_priority(struct drm_sched_entity *entity,
 	for (i = 0; i < entity->num_rq_list; ++i)
 		drm_sched_entity_set_rq_priority(&entity->rq_list[i], priority);
 
-	drm_sched_rq_remove_entity(entity->rq, entity);
-	drm_sched_entity_set_rq_priority(&entity->rq, priority);
-	drm_sched_rq_add_entity(entity->rq, entity);
+	if (entity->rq) {
+		drm_sched_rq_remove_entity(entity->rq, entity);
+		drm_sched_entity_set_rq_priority(&entity->rq, priority);
+		drm_sched_rq_add_entity(entity->rq, entity);
+	}
 
 	spin_unlock(&entity->rq_lock);
 }
diff --git a/drivers/gpu/drm/vkms/vkms_crtc.c b/drivers/gpu/drm/vkms/vkms_crtc.c
index e747a7d16739..1054f535178a 100644
--- a/drivers/gpu/drm/vkms/vkms_crtc.c
+++ b/drivers/gpu/drm/vkms/vkms_crtc.c
@@ -4,13 +4,17 @@
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_crtc_helper.h>
 
-static void _vblank_handle(struct vkms_output *output)
+static enum hrtimer_restart vkms_vblank_simulate(struct hrtimer *timer)
 {
+	struct vkms_output *output = container_of(timer, struct vkms_output,
+						  vblank_hrtimer);
 	struct drm_crtc *crtc = &output->crtc;
 	struct vkms_crtc_state *state = to_vkms_crtc_state(crtc->state);
+	int ret_overrun;
 	bool ret;
 
 	spin_lock(&output->lock);
+
 	ret = drm_crtc_handle_vblank(crtc);
 	if (!ret)
 		DRM_ERROR("vkms failure on handling vblank");
@@ -31,19 +35,9 @@ static void _vblank_handle(struct vkms_output *output)
 			DRM_WARN("failed to queue vkms_crc_work_handle");
 	}
 
-	spin_unlock(&output->lock);
-}
-
-static enum hrtimer_restart vkms_vblank_simulate(struct hrtimer *timer)
-{
-	struct vkms_output *output = container_of(timer, struct vkms_output,
-						  vblank_hrtimer);
-	int ret_overrun;
-
-	_vblank_handle(output);
-
 	ret_overrun = hrtimer_forward_now(&output->vblank_hrtimer,
 					  output->period_ns);
+	spin_unlock(&output->lock);
 
 	return HRTIMER_RESTART;
 }
@@ -81,6 +75,9 @@ bool vkms_get_vblank_timestamp(struct drm_device *dev, unsigned int pipe,
 
 	*vblank_time = output->vblank_hrtimer.node.expires;
 
+	if (!in_vblank_irq)
+		*vblank_time -= output->period_ns;
+
 	return true;
 }