[PATCH v5 0/5] drm/dp_mst: Improve VCPI helpers, use in nouveau

[PATCH v5 0/5] drm/dp_mst: Improve VCPI helpers, use in nouveau

[Lyude Paul]

This patchset does some cleaning up of the atomic VCPI helpers for MST,
and converts nouveau over to using them. I would have included amdgpu in
this patch as well, but at the moment moving them over to the atomic
helpers is nontrivial.

Cc: Daniel Vetter <daniel@ffwll.ch>

Lyude Paul (5):
  drm/dp_mst: Add some atomic state iterator macros
  drm/dp_mst: Start tracking per-port VCPI allocations
  drm/dp_mst: Check payload count in drm_dp_mst_atomic_check()
  drm/nouveau: Use atomic VCPI helpers for MST
  drm/dp_mst: Stop unsetting mstc->port, check connector registration

 drivers/gpu/drm/drm_dp_mst_topology.c   | 251 ++++++++++++++++++++----
 drivers/gpu/drm/i915/intel_display.c    |   4 +
 drivers/gpu/drm/i915/intel_dp_mst.c     |  31 +--
 drivers/gpu/drm/nouveau/dispnv50/disp.c |  65 ++++--
 include/drm/drm_dp_mst_helper.h         | 101 +++++++++-
 5 files changed, 382 insertions(+), 70 deletions(-)

-- 
2.19.1

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[PATCH v5 1/5] drm/dp_mst: Add some atomic state iterator macros

[Lyude Paul]

Signed-off-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 include/drm/drm_dp_mst_helper.h | 77 +++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)

diff --git a/include/drm/drm_dp_mst_helper.h b/include/drm/drm_dp_mst_helper.h
index 59f005b419cf..3faceb66f5cb 100644
--- a/include/drm/drm_dp_mst_helper.h
+++ b/include/drm/drm_dp_mst_helper.h
@@ -628,4 +628,81 @@ int drm_dp_atomic_release_vcpi_slots(struct drm_atomic_state *state,
 int drm_dp_send_power_updown_phy(struct drm_dp_mst_topology_mgr *mgr,
 				 struct drm_dp_mst_port *port, bool power_up);
 
+extern const struct drm_private_state_funcs drm_dp_mst_topology_state_funcs;
+
+static inline bool
+__drm_dp_mst_state_iter_get(struct drm_atomic_state *state,
+			    struct drm_dp_mst_topology_mgr **mgr,
+			    struct drm_dp_mst_topology_state **old_state,
+			    struct drm_dp_mst_topology_state **new_state,
+			    int i)
+{
+	struct __drm_private_objs_state *objs_state = &state->private_objs[i];
+
+	if (objs_state->ptr->funcs != &drm_dp_mst_topology_state_funcs)
+		return false;
+
+	*mgr = to_dp_mst_topology_mgr(objs_state->ptr);
+	if (old_state)
+		*old_state = to_dp_mst_topology_state(objs_state->old_state);
+	if (new_state)
+		*new_state = to_dp_mst_topology_state(objs_state->new_state);
+
+	return true;
+}
+
+/**
+ * for_each_oldnew_mst_mgr_in_state - iterate over all DP MST topology
+ * managers in an atomic update
+ * @__state: &struct drm_atomic_state pointer
+ * @mgr: &struct drm_dp_mst_topology_mgr iteration cursor
+ * @old_state: &struct drm_dp_mst_topology_state iteration cursor for the old
+ * state
+ * @new_state: &struct drm_dp_mst_topology_state iteration cursor for the new
+ * state
+ * @__i: int iteration cursor, for macro-internal use
+ *
+ * This iterates over all DRM DP MST topology managers in an atomic update,
+ * tracking both old and new state. This is useful in places where the state
+ * delta needs to be considered, for example in atomic check functions.
+ */
+#define for_each_oldnew_mst_mgr_in_state(__state, mgr, old_state, new_state, __i) \
+	for ((__i) = 0; (__i) < (__state)->num_private_objs; (__i)++) \
+		for_each_if(__drm_dp_mst_state_iter_get((__state), &(mgr), &(old_state), &(new_state), (__i)))
+
+/**
+ * for_each_old_mst_mgr_in_state - iterate over all DP MST topology managers
+ * in an atomic update
+ * @__state: &struct drm_atomic_state pointer
+ * @mgr: &struct drm_dp_mst_topology_mgr iteration cursor
+ * @old_state: &struct drm_dp_mst_topology_state iteration cursor for the old
+ * state
+ * @__i: int iteration cursor, for macro-internal use
+ *
+ * This iterates over all DRM DP MST topology managers in an atomic update,
+ * tracking only the old state. This is useful in disable functions, where we
+ * need the old state the hardware is still in.
+ */
+#define for_each_old_mst_mgr_in_state(__state, mgr, old_state, __i) \
+	for ((__i) = 0; (__i) < (__state)->num_private_objs; (__i)++) \
+		for_each_if(__drm_dp_mst_state_iter_get((__state), &(mgr), &(old_state), NULL, (__i)))
+
+/**
+ * for_each_new_mst_mgr_in_state - iterate over all DP MST topology managers
+ * in an atomic update
+ * @__state: &struct drm_atomic_state pointer
+ * @mgr: &struct drm_dp_mst_topology_mgr iteration cursor
+ * @new_state: &struct drm_dp_mst_topology_state iteration cursor for the new
+ * state
+ * @__i: int iteration cursor, for macro-internal use
+ *
+ * This iterates over all DRM DP MST topology managers in an atomic update,
+ * tracking only the new state. This is useful in enable functions, where we
+ * need the new state the hardware should be in when the atomic commit
+ * operation has completed.
+ */
+#define for_each_new_mst_mgr_in_state(__state, mgr, new_state, __i) \
+	for ((__i) = 0; (__i) < (__state)->num_private_objs; (__i)++) \
+		for_each_if(__drm_dp_mst_state_iter_get((__state), &(mgr), NULL, &(new_state), (__i)))
+
 #endif
-- 
2.19.1

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[PATCH v5 2/5] drm/dp_mst: Start tracking per-port VCPI allocations

[Lyude Paul]

There has been a TODO waiting for quite a long time in
drm_dp_mst_topology.c:

	/* We cannot rely on port->vcpi.num_slots to update
	 * topology_state->avail_slots as the port may not exist if the parent
	 * branch device was unplugged. This should be fixed by tracking
	 * per-port slot allocation in drm_dp_mst_topology_state instead of
	 * depending on the caller to tell us how many slots to release.
	 */

That's not the only reason we should fix this: forcing the driver to
track the VCPI allocations throughout a state's atomic check is
error prone, because it means that extra care has to be taken with the
order that drm_dp_atomic_find_vcpi_slots() and
drm_dp_atomic_release_vcpi_slots() are called in in order to ensure
idempotency. Currently the only driver actually using these helpers,
i915, doesn't even do this correctly: multiple ->best_encoder() checks
with i915's current implementation would not be idempotent and would
over-allocate VCPI slots, something I learned trying to implement
fallback retraining in MST.

So: simplify this whole mess, and teach drm_dp_atomic_find_vcpi_slots()
and drm_dp_atomic_release_vcpi_slots() to track the VCPI allocations for
each port. This allows us to ensure idempotency without having to rely
on the driver as much. Additionally: the driver doesn't need to do any
kind of VCPI slot tracking anymore if it doesn't need it for it's own
internal state.

Additionally; this adds a new drm_dp_mst_atomic_check() helper which
must be used by atomic drivers to perform validity checks for the new
VCPI allocations incurred by a state.

Also: update the documentation and make it more obvious that these
/must/ be called by /all/ atomic drivers supporting MST.

Changes since v4:
 - Don't skip the atomic checks for VCPI allocations if no new VCPI
   allocations happen in a state. This makes the next change I'm about
   to list here a lot easier to implement.
 - Don't ignore VCPI allocations on destroyed ports, instead ensure that
   when ports are destroyed and still have VCPI allocations in the
   topology state, the only state changes allowed are releasing said
   ports' VCPI. This prevents a state with a mix of VCPI allocations
   from destroyed ports, and allocations from valid ports.

Changes since v3:
 - Don't release VCPI allocations in the topology state immediately in
   drm_dp_atomic_release_vcpi_slots(), instead mark them as 0 and skip
   over them in drm_dp_mst_duplicate_state(). This makes it so
   drm_dp_atomic_release_vcpi_slots() is still idempotent while also
   throwing warnings if the driver messes up it's book keeping and tries
   to release VCPI slots on a port that doesn't have any pre-existing
   VCPI allocation - danvet
 - Change mst_state/state in some debugging messages to "mst state"

Changes since v2:
 - Use kmemdup() for duplicating MST state - danvet
 - Move port validation out of duplicate state callback - danvet
 - Handle looping through MST topology states in
   drm_dp_mst_atomic_check() so the driver doesn't have to do it
 - Fix documentation in drm_dp_atomic_find_vcpi_slots()
 - Move the atomic check for each individual topology state into it's
   own function, reduces indenting
 - Don't consider "stale" MST ports when calculating the bandwidth
   requirements. This is needed because originally we relied on the
   state duplication functions to prune any stale ports from the new
   state, which would prevent us from incorrectly considering their
   bandwidth requirements alongside legitimate new payloads.
 - Add function references in drm_dp_atomic_release_vcpi_slots() - danvet
 - Annotate atomic VCPI and atomic check functions with __must_check
   - danvet

Changes since v1:
 - Don't use the now-removed ->atomic_check() for private objects hook,
   just give drivers a function to call themselves

Signed-off-by: Lyude Paul <lyude@redhat.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/drm_dp_mst_topology.c | 244 ++++++++++++++++++++++----
 drivers/gpu/drm/i915/intel_display.c  |   4 +
 drivers/gpu/drm/i915/intel_dp_mst.c   |  31 ++--
 include/drm/drm_dp_mst_helper.h       |  24 ++-
 4 files changed, 248 insertions(+), 55 deletions(-)

diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index 8c3cfac437f4..42443275624b 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -2614,21 +2614,34 @@ static int drm_dp_init_vcpi(struct drm_dp_mst_topology_mgr *mgr,
 }
 
 /**
- * drm_dp_atomic_find_vcpi_slots() - Find and add vcpi slots to the state
+ * drm_dp_atomic_find_vcpi_slots() - Find and add VCPI slots to the state
  * @state: global atomic state
  * @mgr: MST topology manager for the port
  * @port: port to find vcpi slots for
  * @pbn: bandwidth required for the mode in PBN
  *
- * RETURNS:
- * Total slots in the atomic state assigned for this port or error
+ * Allocates VCPI slots to @port, replacing any previous VCPI allocations it
+ * may have had. Any atomic drivers which support MST must call this function
+ * in their &drm_encoder_helper_funcs.atomic_check() callback to change the
+ * current VCPI allocation for the new state. The allocations are not checked
+ * against the bandwidth restraints of @mgr until the driver calls
+ * drm_dp_mst_atomic_check().
+ *
+ * See also:
+ * drm_dp_atomic_release_vcpi_slots()
+ * drm_dp_mst_atomic_check()
+ *
+ * Returns:
+ * Total slots in the atomic state assigned for this port, or a negative error
+ * code if the port no longer exists
  */
 int drm_dp_atomic_find_vcpi_slots(struct drm_atomic_state *state,
 				  struct drm_dp_mst_topology_mgr *mgr,
 				  struct drm_dp_mst_port *port, int pbn)
 {
 	struct drm_dp_mst_topology_state *topology_state;
-	int req_slots;
+	struct drm_dp_vcpi_allocation *pos, *vcpi = NULL;
+	int prev_slots, req_slots, ret;
 
 	topology_state = drm_atomic_get_mst_topology_state(state, mgr);
 	if (IS_ERR(topology_state))
@@ -2637,20 +2650,43 @@ int drm_dp_atomic_find_vcpi_slots(struct drm_atomic_state *state,
 	port = drm_dp_get_validated_port_ref(mgr, port);
 	if (port == NULL)
 		return -EINVAL;
-	req_slots = DIV_ROUND_UP(pbn, mgr->pbn_div);
-	DRM_DEBUG_KMS("vcpi slots req=%d, avail=%d\n",
-			req_slots, topology_state->avail_slots);
 
-	if (req_slots > topology_state->avail_slots) {
-		drm_dp_put_port(port);
-		return -ENOSPC;
+	topology_state->vcpi_allocated = true;
+
+	/* Find the current allocation for this port, if any */
+	list_for_each_entry(pos, &topology_state->vcpis, next) {
+		if (pos->port == port) {
+			vcpi = pos;
+			prev_slots = vcpi->vcpi;
+			break;
+		}
 	}
+	if (!vcpi)
+		prev_slots = 0;
+
+	req_slots = DIV_ROUND_UP(pbn, mgr->pbn_div);
 
-	topology_state->avail_slots -= req_slots;
-	DRM_DEBUG_KMS("vcpi slots avail=%d", topology_state->avail_slots);
+	DRM_DEBUG_KMS("[CONNECTOR:%d:%s] [MST PORT:%p] VCPI %d -> %d\n",
+		      port->connector->base.id, port->connector->name, port,
+		      prev_slots, req_slots);
 
+	/* Add the new allocation to the state */
+	if (!vcpi) {
+		vcpi = kzalloc(sizeof(*vcpi), GFP_KERNEL);
+		if (!vcpi) {
+			ret = -ENOMEM;
+			goto out;
+		}
+
+		vcpi->port = port;
+		list_add(&vcpi->next, &topology_state->vcpis);
+	}
+	vcpi->vcpi = req_slots;
+
+	ret = req_slots;
+out:
 	drm_dp_put_port(port);
-	return req_slots;
+	return ret;
 }
 EXPORT_SYMBOL(drm_dp_atomic_find_vcpi_slots);
 
@@ -2658,32 +2694,52 @@ EXPORT_SYMBOL(drm_dp_atomic_find_vcpi_slots);
  * drm_dp_atomic_release_vcpi_slots() - Release allocated vcpi slots
  * @state: global atomic state
  * @mgr: MST topology manager for the port
- * @slots: number of vcpi slots to release
+ * @port: The port to release the VCPI slots from
  *
- * RETURNS:
- * 0 if @slots were added back to &drm_dp_mst_topology_state->avail_slots or
- * negative error code
+ * Releases any VCPI slots that have been allocated to a port in the atomic
+ * state. Any atomic drivers which support MST must call this function in
+ * their &drm_connector_helper_funcs.atomic_check() callback when the
+ * connector will no longer have VCPI allocated (e.g. because it's CRTC was
+ * removed).
+ *
+ * It is OK to call this even if @port has been removed from the system, in
+ * which case it will just amount to a no-op.
+ *
+ * See also:
+ * drm_dp_atomic_find_vcpi_slots()
+ * drm_dp_mst_atomic_check()
+ *
+ * Returns:
+ * 0 if all slots for this port were added back to
+ * &drm_dp_mst_topology_state.avail_slots or negative error code
  */
 int drm_dp_atomic_release_vcpi_slots(struct drm_atomic_state *state,
 				     struct drm_dp_mst_topology_mgr *mgr,
-				     int slots)
+				     struct drm_dp_mst_port *port)
 {
 	struct drm_dp_mst_topology_state *topology_state;
+	struct drm_dp_vcpi_allocation *tmp, *pos;
+	bool found = false;
 
 	topology_state = drm_atomic_get_mst_topology_state(state, mgr);
 	if (IS_ERR(topology_state))
 		return PTR_ERR(topology_state);
 
-	/* We cannot rely on port->vcpi.num_slots to update
-	 * topology_state->avail_slots as the port may not exist if the parent
-	 * branch device was unplugged. This should be fixed by tracking
-	 * per-port slot allocation in drm_dp_mst_topology_state instead of
-	 * depending on the caller to tell us how many slots to release.
-	 */
-	topology_state->avail_slots += slots;
-	DRM_DEBUG_KMS("vcpi slots released=%d, avail=%d\n",
-			slots, topology_state->avail_slots);
+	list_for_each_entry_safe(pos, tmp, &topology_state->vcpis, next) {
+		if (pos->port == port) {
+			found = true;
+			break;
+		}
+	}
+	if (WARN_ON(!found)) {
+		DRM_ERROR("no VCPI for [MST PORT:%p] found in mst state %p\n",
+			  port, &topology_state->base);
+		return -EINVAL;
+	}
 
+	DRM_DEBUG_KMS("[MST PORT:%p] vcpi %d -> 0\n",
+		      port, pos->vcpi);
+	pos->vcpi = 0;
 	return 0;
 }
 EXPORT_SYMBOL(drm_dp_atomic_release_vcpi_slots);
@@ -3112,15 +3168,39 @@ static void drm_dp_destroy_connector_work(struct work_struct *work)
 static struct drm_private_state *
 drm_dp_mst_duplicate_state(struct drm_private_obj *obj)
 {
-	struct drm_dp_mst_topology_state *state;
+	struct drm_dp_mst_topology_state *state, *old_state =
+		to_dp_mst_topology_state(obj->state);
+	struct drm_dp_vcpi_allocation *pos, *vcpi;
 
-	state = kmemdup(obj->state, sizeof(*state), GFP_KERNEL);
+	state = kmemdup(old_state, sizeof(*state), GFP_KERNEL);
 	if (!state)
 		return NULL;
 
 	__drm_atomic_helper_private_obj_duplicate_state(obj, &state->base);
 
+	INIT_LIST_HEAD(&state->vcpis);
+	state->vcpi_allocated = false;
+
+	list_for_each_entry(pos, &old_state->vcpis, next) {
+		/* Prune leftover freed VCPI allocations */
+		if (!pos->vcpi)
+			continue;
+
+		vcpi = kmemdup(pos, sizeof(*vcpi), GFP_KERNEL);
+		if (!vcpi)
+			goto fail_alloc;
+
+		list_add(&vcpi->next, &state->vcpis);
+	}
+
 	return &state->base;
+
+fail_alloc:
+	list_for_each_entry_safe(pos, vcpi, &state->vcpis, next)
+		kfree(pos);
+	kfree(state);
+
+	return NULL;
 }
 
 static void drm_dp_mst_destroy_state(struct drm_private_obj *obj,
@@ -3128,14 +3208,112 @@ static void drm_dp_mst_destroy_state(struct drm_private_obj *obj,
 {
 	struct drm_dp_mst_topology_state *mst_state =
 		to_dp_mst_topology_state(state);
+	struct drm_dp_vcpi_allocation *pos, *tmp;
+
+	list_for_each_entry_safe(pos, tmp, &mst_state->vcpis, next)
+		kfree(pos);
 
 	kfree(mst_state);
 }
 
-static const struct drm_private_state_funcs mst_state_funcs = {
+static inline int
+drm_dp_mst_atomic_check_topology_state(struct drm_dp_mst_topology_mgr *mgr,
+				       struct drm_dp_mst_topology_state *mst_state)
+{
+	struct drm_dp_vcpi_allocation *vcpi;
+	struct drm_dp_mst_port *port;
+	int avail_slots = 63, ret;
+
+	/* There's no possible scenario where releasing VCPI or keeping it the
+	 * same would make the state invalid
+	 */
+	if (!mst_state->vcpi_allocated) {
+		DRM_DEBUG_ATOMIC("[MST MGR:%p] state %p allocates no VCPI, check skipped\n",
+				 mgr, &mst_state->base);
+		return 0;
+	}
+
+	list_for_each_entry(vcpi, &mst_state->vcpis, next) {
+		/* Releasing VCPI is always OK-even if the port is gone */
+		if (!vcpi->vcpi) {
+			DRM_DEBUG_ATOMIC("[MST PORT:%p] releases all VCPI slots\n",
+					 vcpi->port);
+			continue;
+		}
+
+		port = drm_dp_get_validated_port_ref(mgr, vcpi->port);
+		if (!port) {
+			DRM_DEBUG_ATOMIC("[MST PORT:%p] is gone but still has VCPI, cannot add new VCPI\n",
+					 vcpi->port);
+			return -EINVAL;
+		}
+
+		DRM_DEBUG_ATOMIC("[MST PORT:%p] requires %d vcpi slots\n",
+				 vcpi->port, vcpi->vcpi);
+
+		avail_slots -= vcpi->vcpi;
+		if (avail_slots < 0) {
+			DRM_DEBUG_ATOMIC("[MST PORT:%p] not enough VCPI slots in mst state %p (avail=%d)\n",
+					 vcpi->port, mst_state,
+					 avail_slots + vcpi->vcpi);
+			ret = -ENOSPC;
+			goto port_fail;
+		}
+
+		drm_dp_put_port(port);
+	}
+	DRM_DEBUG_ATOMIC("[MST MGR:%p] mst state %p VCPI avail=%d used=%d\n",
+			 mgr, mst_state, avail_slots,
+			 63 - avail_slots);
+
+	return 0;
+port_fail:
+	drm_dp_put_port(port);
+	return ret;
+}
+
+/**
+ * drm_dp_mst_atomic_check - Check that the new state of an MST topology in an
+ * atomic update is valid
+ * @state: Pointer to the new &struct drm_dp_mst_topology_state
+ *
+ * Checks the given topology state for an atomic update to ensure that it's
+ * valid. This includes checking whether there's enough bandwidth to support
+ * the new VCPI allocations in the atomic update.
+ *
+ * Any atomic drivers supporting DP MST must make sure to call this after
+ * checking the rest of their state in their
+ * &drm_mode_config_funcs.atomic_check() callback.
+ *
+ * See also:
+ * drm_dp_atomic_find_vcpi_slots()
+ * drm_dp_atomic_release_vcpi_slots()
+ *
+ * Returns:
+ *
+ * 0 if the new state is valid, negative error code otherwise.
+ */
+int drm_dp_mst_atomic_check(struct drm_atomic_state *state)
+{
+	struct drm_dp_mst_topology_mgr *mgr;
+	struct drm_dp_mst_topology_state *mst_state;
+	int i, ret = 0;
+
+	for_each_new_mst_mgr_in_state(state, mgr, mst_state, i) {
+		ret = drm_dp_mst_atomic_check_topology_state(mgr, mst_state);
+		if (ret)
+			break;
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL(drm_dp_mst_atomic_check);
+
+const struct drm_private_state_funcs drm_dp_mst_topology_state_funcs = {
 	.atomic_duplicate_state = drm_dp_mst_duplicate_state,
 	.atomic_destroy_state = drm_dp_mst_destroy_state,
 };
+EXPORT_SYMBOL(drm_dp_mst_topology_state_funcs);
 
 /**
  * drm_atomic_get_mst_topology_state: get MST topology state
@@ -3213,13 +3391,11 @@ int drm_dp_mst_topology_mgr_init(struct drm_dp_mst_topology_mgr *mgr,
 		return -ENOMEM;
 
 	mst_state->mgr = mgr;
-
-	/* max. time slots - one slot for MTP header */
-	mst_state->avail_slots = 63;
+	INIT_LIST_HEAD(&mst_state->vcpis);
 
 	drm_atomic_private_obj_init(&mgr->base,
 				    &mst_state->base,
-				    &mst_state_funcs);
+				    &drm_dp_mst_topology_state_funcs);
 
 	return 0;
 }
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index ae6d58dbf1ed..c3e0f20d161b 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -12547,6 +12547,10 @@ static int intel_atomic_check(struct drm_device *dev,
 				       "[modeset]" : "[fastset]");
 	}
 
+	ret = drm_dp_mst_atomic_check(state);
+	if (ret)
+		return ret;
+
 	if (any_ms) {
 		ret = intel_modeset_checks(state);
 
diff --git a/drivers/gpu/drm/i915/intel_dp_mst.c b/drivers/gpu/drm/i915/intel_dp_mst.c
index 8cb4093f8bcc..29c47c5f5747 100644
--- a/drivers/gpu/drm/i915/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/intel_dp_mst.c
@@ -114,28 +114,31 @@ static int intel_dp_mst_atomic_check(struct drm_connector *connector,
 	struct drm_connector_state *old_conn_state;
 	struct drm_crtc *old_crtc;
 	struct drm_crtc_state *crtc_state;
-	int slots, ret = 0;
+	struct intel_connector *intel_connector =
+		to_intel_connector(connector);
+	struct drm_dp_mst_topology_mgr *mgr =
+		&intel_connector->mst_port->mst_mgr;
+	struct drm_dp_mst_port *port = intel_connector->port;
+	int ret = 0;
 
 	old_conn_state = drm_atomic_get_old_connector_state(state, connector);
 	old_crtc = old_conn_state->crtc;
 	if (!old_crtc)
 		return ret;
 
-	crtc_state = drm_atomic_get_new_crtc_state(state, old_crtc);
-	slots = to_intel_crtc_state(crtc_state)->dp_m_n.tu;
-	if (drm_atomic_crtc_needs_modeset(crtc_state) && slots > 0) {
-		struct drm_dp_mst_topology_mgr *mgr;
-		struct drm_encoder *old_encoder;
+	/* Free VCPI, since compute_config() won't be run */
+	if (!new_conn_state->crtc) {
+		crtc_state = drm_atomic_get_new_crtc_state(state, old_crtc);
 
-		old_encoder = old_conn_state->best_encoder;
-		mgr = &enc_to_mst(old_encoder)->primary->dp.mst_mgr;
-
-		ret = drm_dp_atomic_release_vcpi_slots(state, mgr, slots);
-		if (ret)
-			DRM_DEBUG_KMS("failed releasing %d vcpi slots:%d\n", slots, ret);
-		else
-			to_intel_crtc_state(crtc_state)->dp_m_n.tu = 0;
+		ret = drm_dp_atomic_release_vcpi_slots(state, mgr, port);
+		if (ret) {
+			DRM_DEBUG_KMS("failed releasing vcpi slots: %d\n",
+				      ret);
+			return ret;
+		}
+		to_intel_crtc_state(crtc_state)->dp_m_n.tu = 0;
 	}
+
 	return ret;
 }
 
diff --git a/include/drm/drm_dp_mst_helper.h b/include/drm/drm_dp_mst_helper.h
index 3faceb66f5cb..2392e12b6bce 100644
--- a/include/drm/drm_dp_mst_helper.h
+++ b/include/drm/drm_dp_mst_helper.h
@@ -406,9 +406,16 @@ struct drm_dp_payload {
 
 #define to_dp_mst_topology_state(x) container_of(x, struct drm_dp_mst_topology_state, base)
 
+struct drm_dp_vcpi_allocation {
+	struct drm_dp_mst_port *port;
+	int vcpi;
+	struct list_head next;
+};
+
 struct drm_dp_mst_topology_state {
 	struct drm_private_state base;
-	int avail_slots;
+	struct list_head vcpis;
+	u8 vcpi_allocated;
 	struct drm_dp_mst_topology_mgr *mgr;
 };
 
@@ -619,14 +626,17 @@ void drm_dp_mst_topology_mgr_suspend(struct drm_dp_mst_topology_mgr *mgr);
 int drm_dp_mst_topology_mgr_resume(struct drm_dp_mst_topology_mgr *mgr);
 struct drm_dp_mst_topology_state *drm_atomic_get_mst_topology_state(struct drm_atomic_state *state,
 								    struct drm_dp_mst_topology_mgr *mgr);
-int drm_dp_atomic_find_vcpi_slots(struct drm_atomic_state *state,
-				  struct drm_dp_mst_topology_mgr *mgr,
-				  struct drm_dp_mst_port *port, int pbn);
-int drm_dp_atomic_release_vcpi_slots(struct drm_atomic_state *state,
-				     struct drm_dp_mst_topology_mgr *mgr,
-				     int slots);
+int __must_check
+drm_dp_atomic_find_vcpi_slots(struct drm_atomic_state *state,
+			      struct drm_dp_mst_topology_mgr *mgr,
+			      struct drm_dp_mst_port *port, int pbn);
+int __must_check
+drm_dp_atomic_release_vcpi_slots(struct drm_atomic_state *state,
+				 struct drm_dp_mst_topology_mgr *mgr,
+				 struct drm_dp_mst_port *port);
 int drm_dp_send_power_updown_phy(struct drm_dp_mst_topology_mgr *mgr,
 				 struct drm_dp_mst_port *port, bool power_up);
+int __must_check drm_dp_mst_atomic_check(struct drm_atomic_state *state);
 
 extern const struct drm_private_state_funcs drm_dp_mst_topology_state_funcs;
 
-- 
2.19.1

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[PATCH v5 3/5] drm/dp_mst: Check payload count in drm_dp_mst_atomic_check()

[Lyude Paul]

It occurred to me that we never actually check this! So let's start
doing that.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/drm_dp_mst_topology.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index 42443275624b..89a6d48314ef 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -3222,7 +3222,7 @@ drm_dp_mst_atomic_check_topology_state(struct drm_dp_mst_topology_mgr *mgr,
 {
 	struct drm_dp_vcpi_allocation *vcpi;
 	struct drm_dp_mst_port *port;
-	int avail_slots = 63, ret;
+	int avail_slots = 63, payload_count = 0, ret;
 
 	/* There's no possible scenario where releasing VCPI or keeping it the
 	 * same would make the state invalid
@@ -3260,6 +3260,13 @@ drm_dp_mst_atomic_check_topology_state(struct drm_dp_mst_topology_mgr *mgr,
 			goto port_fail;
 		}
 
+		if (++payload_count > mgr->max_payloads) {
+			DRM_DEBUG_ATOMIC("[MST MGR:%p] state %p has too many payloads (max=%d)\n",
+					 mgr, mst_state, mgr->max_payloads);
+			ret = -EINVAL;
+			goto port_fail;
+		}
+
 		drm_dp_put_port(port);
 	}
 	DRM_DEBUG_ATOMIC("[MST MGR:%p] mst state %p VCPI avail=%d used=%d\n",
-- 
2.19.1

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[PATCH v5 4/5] drm/nouveau: Use atomic VCPI helpers for MST

[Lyude Paul]

Currently, nouveau uses the yolo method of setting up MST displays: it
uses the old VCPI helpers (drm_dp_find_vcpi_slots()) for computing the
display configuration. These helpers don't take care to make sure they
take a reference to the mstb port that they're checking, and
additionally don't actually check whether or not the topology still has
enough bandwidth to provide the VCPI tokens required.

So, drop usage of the old helpers and move entirely over to the atomic
helpers.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/nouveau/dispnv50/disp.c | 50 +++++++++++++++++++++----
 1 file changed, 43 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c
index 6cbbae3f438b..0469ef9e1a54 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
@@ -747,16 +747,22 @@ nv50_msto_atomic_check(struct drm_encoder *encoder,
 		       struct drm_crtc_state *crtc_state,
 		       struct drm_connector_state *conn_state)
 {
-	struct nv50_mstc *mstc = nv50_mstc(conn_state->connector);
+	struct drm_atomic_state *state = crtc_state->state;
+	struct drm_connector *connector = conn_state->connector;
+	struct nv50_mstc *mstc = nv50_mstc(connector);
 	struct nv50_mstm *mstm = mstc->mstm;
-	int bpp = conn_state->connector->display_info.bpc * 3;
+	int bpp = connector->display_info.bpc * 3;
 	int slots;
 
-	mstc->pbn = drm_dp_calc_pbn_mode(crtc_state->adjusted_mode.clock, bpp);
-
-	slots = drm_dp_find_vcpi_slots(&mstm->mgr, mstc->pbn);
-	if (slots < 0)
-		return slots;
+	mstc->pbn = drm_dp_calc_pbn_mode(crtc_state->adjusted_mode.clock,
+					 bpp);
+	/* Zombies don't need VCPI */
+	if (!drm_connector_is_unregistered(connector)) {
+		slots = drm_dp_atomic_find_vcpi_slots(state, &mstm->mgr,
+						      mstc->port, mstc->pbn);
+		if (slots < 0)
+			return slots;
+	}
 
 	return nv50_outp_atomic_check_view(encoder, crtc_state, conn_state,
 					   mstc->native);
@@ -920,12 +926,38 @@ nv50_mstc_get_modes(struct drm_connector *connector)
 	return ret;
 }
 
+static int
+nv50_mstc_atomic_check(struct drm_connector *connector,
+		       struct drm_connector_state *new_conn_state)
+{
+	struct drm_atomic_state *state = new_conn_state->state;
+	struct nv50_mstc *mstc = nv50_mstc(connector);
+	struct drm_dp_mst_topology_mgr *mgr = &mstc->mstm->mgr;
+	struct drm_connector_state *old_conn_state;
+	struct drm_crtc *old_crtc;
+
+	old_conn_state = drm_atomic_get_old_connector_state(state, connector);
+	old_crtc = old_conn_state->crtc;
+
+	/* We only need to release VCPI here if we're going from having a CRTC
+	 * on this connector, to not having one
+	 */
+	if (!old_crtc || new_conn_state->crtc)
+		return 0;
+
+	/* Release the previous VCPI allocation since the encoder's
+	 * atomic_check() won't be called
+	 */
+	return drm_dp_atomic_release_vcpi_slots(state, mgr, mstc->port);
+}
+
 static const struct drm_connector_helper_funcs
 nv50_mstc_help = {
 	.get_modes = nv50_mstc_get_modes,
 	.mode_valid = nv50_mstc_mode_valid,
 	.best_encoder = nv50_mstc_best_encoder,
 	.atomic_best_encoder = nv50_mstc_atomic_best_encoder,
+	.atomic_check = nv50_mstc_atomic_check,
 };
 
 static enum drm_connector_status
@@ -2109,6 +2141,10 @@ nv50_disp_atomic_check(struct drm_device *dev, struct drm_atomic_state *state)
 			return ret;
 	}
 
+	ret = drm_dp_mst_atomic_check(state);
+	if (ret)
+		return ret;
+
 	return 0;
 }
 
-- 
2.19.1

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[PATCH v5 5/5] drm/dp_mst: Stop unsetting mstc->port, check connector registration

[Lyude Paul]

Same thing we did in i915, but for nouveau now.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
---
 drivers/gpu/drm/nouveau/dispnv50/disp.c | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c
index 0469ef9e1a54..ff04a56b5949 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
@@ -698,8 +698,10 @@ nv50_msto_cleanup(struct nv50_msto *msto)
 	struct nv50_mstm *mstm = mstc->mstm;
 
 	NV_ATOMIC(drm, "%s: msto cleanup\n", msto->encoder.name);
-	if (mstc->port && mstc->port->vcpi.vcpi > 0 && !nv50_msto_payload(msto))
+	if (!drm_connector_is_unregistered(&mstc->connector) &&
+	    mstc->port->vcpi.vcpi > 0 && !nv50_msto_payload(msto))
 		drm_dp_mst_deallocate_vcpi(&mstm->mgr, mstc->port);
+
 	if (msto->disabled) {
 		msto->mstc = NULL;
 		msto->head = NULL;
@@ -725,7 +727,8 @@ nv50_msto_prepare(struct nv50_msto *msto)
 	};
 
 	NV_ATOMIC(drm, "%s: msto prepare\n", msto->encoder.name);
-	if (mstc->port && mstc->port->vcpi.vcpi > 0) {
+	if (!drm_connector_is_unregistered(&mstc->connector) &&
+	    mstc->port->vcpi.vcpi > 0) {
 		struct drm_dp_payload *payload = nv50_msto_payload(msto);
 		if (payload) {
 			args.vcpi.start_slot = payload->start_slot;
@@ -828,7 +831,7 @@ nv50_msto_disable(struct drm_encoder *encoder)
 	struct nv50_mstc *mstc = msto->mstc;
 	struct nv50_mstm *mstm = mstc->mstm;
 
-	if (mstc->port)
+	if (!drm_connector_is_unregistered(&mstc->connector))
 		drm_dp_mst_reset_vcpi_slots(&mstm->mgr, mstc->port);
 
 	mstm->outp->update(mstm->outp, msto->head->base.index, NULL, 0, 0);
@@ -967,7 +970,7 @@ nv50_mstc_detect(struct drm_connector *connector, bool force)
 	enum drm_connector_status conn_status;
 	int ret;
 
-	if (!mstc->port)
+	if (drm_connector_is_unregistered(&mstc->connector))
 		return connector_status_disconnected;
 
 	ret = pm_runtime_get_sync(connector->dev->dev);
@@ -1105,10 +1108,6 @@ nv50_mstm_destroy_connector(struct drm_dp_mst_topology_mgr *mgr,
 
 	drm_fb_helper_remove_one_connector(&drm->fbcon->helper, &mstc->connector);
 
-	drm_modeset_lock(&drm->dev->mode_config.connection_mutex, NULL);
-	mstc->port = NULL;
-	drm_modeset_unlock(&drm->dev->mode_config.connection_mutex);
-
 	drm_connector_put(&mstc->connector);
 }
 
-- 
2.19.1

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✗ Fi.CI.CHECKPATCH: warning for drm/dp_mst: Improve VCPI helpers, use in nouveau (rev5)

[Patchwork]

== Series Details ==

Series: drm/dp_mst: Improve VCPI helpers, use in nouveau (rev5)
URL   : https://patchwork.freedesktop.org/series/51412/
State : warning

== Summary ==

$ dim checkpatch origin/drm-tip
6c1d46966cc3 drm/dp_mst: Add some atomic state iterator macros
-:7: WARNING:COMMIT_MESSAGE: Missing commit description - Add an appropriate one

-:55: CHECK:MACRO_ARG_REUSE: Macro argument reuse '__state' - possible side-effects?
#55: FILE: include/drm/drm_dp_mst_helper.h:669:
+#define for_each_oldnew_mst_mgr_in_state(__state, mgr, old_state, new_state, __i) \
+	for ((__i) = 0; (__i) < (__state)->num_private_objs; (__i)++) \
+		for_each_if(__drm_dp_mst_state_iter_get((__state), &(mgr), &(old_state), &(new_state), (__i)))

-:55: CHECK:MACRO_ARG_REUSE: Macro argument reuse '__i' - possible side-effects?
#55: FILE: include/drm/drm_dp_mst_helper.h:669:
+#define for_each_oldnew_mst_mgr_in_state(__state, mgr, old_state, new_state, __i) \
+	for ((__i) = 0; (__i) < (__state)->num_private_objs; (__i)++) \
+		for_each_if(__drm_dp_mst_state_iter_get((__state), &(mgr), &(old_state), &(new_state), (__i)))

-:57: WARNING:LONG_LINE: line over 100 characters
#57: FILE: include/drm/drm_dp_mst_helper.h:671:
+		for_each_if(__drm_dp_mst_state_iter_get((__state), &(mgr), &(old_state), &(new_state), (__i)))

-:72: CHECK:MACRO_ARG_REUSE: Macro argument reuse '__state' - possible side-effects?
#72: FILE: include/drm/drm_dp_mst_helper.h:686:
+#define for_each_old_mst_mgr_in_state(__state, mgr, old_state, __i) \
+	for ((__i) = 0; (__i) < (__state)->num_private_objs; (__i)++) \
+		for_each_if(__drm_dp_mst_state_iter_get((__state), &(mgr), &(old_state), NULL, (__i)))

-:72: CHECK:MACRO_ARG_REUSE: Macro argument reuse '__i' - possible side-effects?
#72: FILE: include/drm/drm_dp_mst_helper.h:686:
+#define for_each_old_mst_mgr_in_state(__state, mgr, old_state, __i) \
+	for ((__i) = 0; (__i) < (__state)->num_private_objs; (__i)++) \
+		for_each_if(__drm_dp_mst_state_iter_get((__state), &(mgr), &(old_state), NULL, (__i)))

-:74: WARNING:LONG_LINE: line over 100 characters
#74: FILE: include/drm/drm_dp_mst_helper.h:688:
+		for_each_if(__drm_dp_mst_state_iter_get((__state), &(mgr), &(old_state), NULL, (__i)))

-:90: CHECK:MACRO_ARG_REUSE: Macro argument reuse '__state' - possible side-effects?
#90: FILE: include/drm/drm_dp_mst_helper.h:704:
+#define for_each_new_mst_mgr_in_state(__state, mgr, new_state, __i) \
+	for ((__i) = 0; (__i) < (__state)->num_private_objs; (__i)++) \
+		for_each_if(__drm_dp_mst_state_iter_get((__state), &(mgr), NULL, &(new_state), (__i)))

-:90: CHECK:MACRO_ARG_REUSE: Macro argument reuse '__i' - possible side-effects?
#90: FILE: include/drm/drm_dp_mst_helper.h:704:
+#define for_each_new_mst_mgr_in_state(__state, mgr, new_state, __i) \
+	for ((__i) = 0; (__i) < (__state)->num_private_objs; (__i)++) \
+		for_each_if(__drm_dp_mst_state_iter_get((__state), &(mgr), NULL, &(new_state), (__i)))

-:92: WARNING:LONG_LINE: line over 100 characters
#92: FILE: include/drm/drm_dp_mst_helper.h:706:
+		for_each_if(__drm_dp_mst_state_iter_get((__state), &(mgr), NULL, &(new_state), (__i)))

total: 0 errors, 4 warnings, 6 checks, 81 lines checked
8b77df84da92 drm/dp_mst: Start tracking per-port VCPI allocations
33419b2848c1 drm/dp_mst: Check payload count in drm_dp_mst_atomic_check()
db18f4334f3b drm/nouveau: Use atomic VCPI helpers for MST
41e3126c1a83 drm/dp_mst: Stop unsetting mstc->port, check connector registration

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✗ Fi.CI.SPARSE: warning for drm/dp_mst: Improve VCPI helpers, use in nouveau (rev5)

[Patchwork]

== Series Details ==

Series: drm/dp_mst: Improve VCPI helpers, use in nouveau (rev5)
URL   : https://patchwork.freedesktop.org/series/51412/
State : warning

== Summary ==

$ dim sparse origin/drm-tip
Sparse version: v0.5.2
Commit: drm/dp_mst: Add some atomic state iterator macros
Okay!

Commit: drm/dp_mst: Start tracking per-port VCPI allocations
+./include/linux/slab.h:332:43: warning: dubious: x & !y

Commit: drm/dp_mst: Check payload count in drm_dp_mst_atomic_check()
Okay!

Commit: drm/nouveau: Use atomic VCPI helpers for MST
Okay!

Commit: drm/dp_mst: Stop unsetting mstc->port, check connector registration
Okay!

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✗ Fi.CI.BAT: failure for drm/dp_mst: Improve VCPI helpers, use in nouveau (rev5)

[Patchwork]

== Series Details ==

Series: drm/dp_mst: Improve VCPI helpers, use in nouveau (rev5)
URL   : https://patchwork.freedesktop.org/series/51412/
State : failure

== Summary ==

= CI Bug Log - changes from CI_DRM_5107 -> Patchwork_10781 =

== Summary - FAILURE ==

  Serious unknown changes coming with Patchwork_10781 absolutely need to be
  verified manually.
  
  If you think the reported changes have nothing to do with the changes
  introduced in Patchwork_10781, please notify your bug team to allow them
  to document this new failure mode, which will reduce false positives in CI.

  External URL: https://patchwork.freedesktop.org/api/1.0/series/51412/revisions/5/mbox/

== Possible new issues ==

  Here are the unknown changes that may have been introduced in Patchwork_10781:

  === IGT changes ===

    ==== Possible regressions ====

    igt@drv_selftest@live_execlists:
      fi-skl-6700k2:      PASS -> INCOMPLETE

    
== Known issues ==

  Here are the changes found in Patchwork_10781 that come from known issues:

  === IGT changes ===

    ==== Issues hit ====

    igt@gem_ctx_create@basic-files:
      fi-icl-u2:          PASS -> DMESG-WARN (fdo#107724)

    igt@kms_chamelium@common-hpd-after-suspend:
      fi-skl-6700k2:      PASS -> WARN (fdo#108680)

    igt@kms_frontbuffer_tracking@basic:
      fi-byt-clapper:     PASS -> FAIL (fdo#103167)

    igt@kms_pipe_crc_basic@suspend-read-crc-pipe-a:
      fi-icl-u:           PASS -> INCOMPLETE (fdo#107713)

    
    ==== Possible fixes ====

    igt@gem_ctx_create@basic-files:
      fi-bsw-kefka:       FAIL (fdo#108656) -> PASS

    igt@kms_frontbuffer_tracking@basic:
      fi-icl-u2:          FAIL (fdo#103167) -> PASS

    igt@kms_pipe_crc_basic@suspend-read-crc-pipe-a:
      fi-byt-clapper:     FAIL (fdo#103191, fdo#107362) -> PASS +2

    
  fdo#103167 https://bugs.freedesktop.org/show_bug.cgi?id=103167
  fdo#103191 https://bugs.freedesktop.org/show_bug.cgi?id=103191
  fdo#107362 https://bugs.freedesktop.org/show_bug.cgi?id=107362
  fdo#107713 https://bugs.freedesktop.org/show_bug.cgi?id=107713
  fdo#107724 https://bugs.freedesktop.org/show_bug.cgi?id=107724
  fdo#108656 https://bugs.freedesktop.org/show_bug.cgi?id=108656
  fdo#108680 https://bugs.freedesktop.org/show_bug.cgi?id=108680


== Participating hosts (53 -> 47) ==

  Missing    (6): fi-ilk-m540 fi-hsw-4200u fi-byt-squawks fi-bsw-cyan fi-snb-2520m fi-ctg-p8600 


== Build changes ==

    * Linux: CI_DRM_5107 -> Patchwork_10781

  CI_DRM_5107: b07f30fa49a617aa13678e39763bced4bf3a69e4 @ git://anongit.freedesktop.org/gfx-ci/linux
  IGT_4714: cab148ca3ec904a94d0cd43476cf7e1f8663f906 @ git://anongit.freedesktop.org/xorg/app/intel-gpu-tools
  Patchwork_10781: 41e3126c1a838b6b0110e523a0c125c9cff5b215 @ git://anongit.freedesktop.org/gfx-ci/linux


== Linux commits ==

41e3126c1a83 drm/dp_mst: Stop unsetting mstc->port, check connector registration
db18f4334f3b drm/nouveau: Use atomic VCPI helpers for MST
33419b2848c1 drm/dp_mst: Check payload count in drm_dp_mst_atomic_check()
8b77df84da92 drm/dp_mst: Start tracking per-port VCPI allocations
6c1d46966cc3 drm/dp_mst: Add some atomic state iterator macros

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_10781/issues.html
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

✓ Fi.CI.BAT: success for drm/dp_mst: Improve VCPI helpers, use in nouveau (rev5)

[Patchwork]

== Series Details ==

Series: drm/dp_mst: Improve VCPI helpers, use in nouveau (rev5)
URL   : https://patchwork.freedesktop.org/series/51412/
State : success

== Summary ==

= CI Bug Log - changes from CI_DRM_5107 -> Patchwork_10783 =

== Summary - WARNING ==

  Minor unknown changes coming with Patchwork_10783 need to be verified
  manually.
  
  If you think the reported changes have nothing to do with the changes
  introduced in Patchwork_10783, please notify your bug team to allow them
  to document this new failure mode, which will reduce false positives in CI.

  External URL: https://patchwork.freedesktop.org/api/1.0/series/51412/revisions/5/mbox/

== Possible new issues ==

  Here are the unknown changes that may have been introduced in Patchwork_10783:

  === IGT changes ===

    ==== Warnings ====

    igt@drv_selftest@live_guc:
      fi-icl-u:           PASS -> SKIP +2
      fi-skl-iommu:       PASS -> SKIP +1

    
== Known issues ==

  Here are the changes found in Patchwork_10783 that come from known issues:

  === IGT changes ===

    ==== Issues hit ====

    igt@drv_selftest@live_hangcheck:
      fi-skl-iommu:       PASS -> INCOMPLETE (fdo#108602)

    igt@gem_exec_suspend@basic-s3:
      fi-blb-e6850:       PASS -> INCOMPLETE (fdo#107718)

    igt@kms_pipe_crc_basic@nonblocking-crc-pipe-b:
      fi-byt-clapper:     PASS -> FAIL (fdo#107362)

    
    ==== Possible fixes ====

    igt@gem_ctx_create@basic-files:
      fi-bsw-kefka:       FAIL (fdo#108656) -> PASS

    igt@kms_pipe_crc_basic@suspend-read-crc-pipe-a:
      fi-byt-clapper:     FAIL (fdo#103191, fdo#107362) -> PASS +2

    
    ==== Warnings ====

    igt@drv_selftest@live_contexts:
      fi-icl-u:           DMESG-FAIL (fdo#108569) -> INCOMPLETE (fdo#108315)

    
  fdo#103191 https://bugs.freedesktop.org/show_bug.cgi?id=103191
  fdo#107362 https://bugs.freedesktop.org/show_bug.cgi?id=107362
  fdo#107718 https://bugs.freedesktop.org/show_bug.cgi?id=107718
  fdo#108315 https://bugs.freedesktop.org/show_bug.cgi?id=108315
  fdo#108569 https://bugs.freedesktop.org/show_bug.cgi?id=108569
  fdo#108602 https://bugs.freedesktop.org/show_bug.cgi?id=108602
  fdo#108656 https://bugs.freedesktop.org/show_bug.cgi?id=108656


== Participating hosts (53 -> 46) ==

  Missing    (7): fi-ilk-m540 fi-hsw-4200u fi-byt-squawks fi-icl-u2 fi-bsw-cyan fi-snb-2520m fi-ctg-p8600 


== Build changes ==

    * Linux: CI_DRM_5107 -> Patchwork_10783

  CI_DRM_5107: b07f30fa49a617aa13678e39763bced4bf3a69e4 @ git://anongit.freedesktop.org/gfx-ci/linux
  IGT_4714: cab148ca3ec904a94d0cd43476cf7e1f8663f906 @ git://anongit.freedesktop.org/xorg/app/intel-gpu-tools
  Patchwork_10783: c3c450d594f20c61d20237f8b8aa3c5890d755d1 @ git://anongit.freedesktop.org/gfx-ci/linux


== Linux commits ==

c3c450d594f2 drm/dp_mst: Stop unsetting mstc->port, check connector registration
ed680ecba568 drm/nouveau: Use atomic VCPI helpers for MST
556aeeecb2a5 drm/dp_mst: Check payload count in drm_dp_mst_atomic_check()
d5d4f3ebac3f drm/dp_mst: Start tracking per-port VCPI allocations
1085acde6755 drm/dp_mst: Add some atomic state iterator macros

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_10783/issues.html
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

✓ Fi.CI.IGT: success for drm/dp_mst: Improve VCPI helpers, use in nouveau (rev5)

[Patchwork]

== Series Details ==

Series: drm/dp_mst: Improve VCPI helpers, use in nouveau (rev5)
URL   : https://patchwork.freedesktop.org/series/51412/
State : success

== Summary ==

= CI Bug Log - changes from CI_DRM_5107_full -> Patchwork_10783_full =

== Summary - WARNING ==

  Minor unknown changes coming with Patchwork_10783_full need to be verified
  manually.
  
  If you think the reported changes have nothing to do with the changes
  introduced in Patchwork_10783_full, please notify your bug team to allow them
  to document this new failure mode, which will reduce false positives in CI.

  

== Possible new issues ==

  Here are the unknown changes that may have been introduced in Patchwork_10783_full:

  === IGT changes ===

    ==== Warnings ====

    {igt@kms_lease@lease_invalid_connector}:
      shard-snb:          SKIP -> PASS +1

    igt@perf_pmu@rc6:
      shard-kbl:          SKIP -> PASS

    
== Known issues ==

  Here are the changes found in Patchwork_10783_full that come from known issues:

  === IGT changes ===

    ==== Issues hit ====

    igt@drv_suspend@shrink:
      shard-skl:          NOTRUN -> INCOMPLETE (fdo#106886)

    igt@gem_cpu_reloc@full:
      shard-skl:          PASS -> INCOMPLETE (fdo#108073)

    igt@gem_exec_schedule@pi-ringfull-blt:
      shard-skl:          NOTRUN -> FAIL (fdo#103158) +1

    igt@gem_exec_schedule@pi-ringfull-bsd:
      shard-apl:          NOTRUN -> FAIL (fdo#103158)

    igt@gem_exec_whisper@normal:
      shard-skl:          PASS -> TIMEOUT (fdo#108592)

    igt@gem_ppgtt@blt-vs-render-ctxn:
      shard-skl:          NOTRUN -> TIMEOUT (fdo#108039)

    igt@kms_atomic_transition@1x-modeset-transitions-nonblocking:
      shard-skl:          NOTRUN -> FAIL (fdo#108228, fdo#108470)

    igt@kms_busy@extended-modeset-hang-newfb-render-c:
      shard-skl:          NOTRUN -> DMESG-WARN (fdo#107956) +2

    igt@kms_busy@extended-pageflip-modeset-hang-oldfb-render-c:
      shard-glk:          NOTRUN -> DMESG-WARN (fdo#107956)

    igt@kms_ccs@pipe-b-crc-sprite-planes-basic:
      shard-glk:          PASS -> FAIL (fdo#108145)

    igt@kms_chv_cursor_fail@pipe-c-256x256-top-edge:
      shard-skl:          NOTRUN -> FAIL (fdo#104671)

    igt@kms_color@pipe-c-ctm-blue-to-red:
      shard-skl:          NOTRUN -> FAIL (fdo#107201)

    igt@kms_cursor_crc@cursor-64x21-sliding:
      shard-skl:          NOTRUN -> FAIL (fdo#103232) +1

    igt@kms_draw_crc@draw-method-xrgb2101010-mmap-gtt-xtiled:
      shard-skl:          PASS -> FAIL (fdo#103184)

    igt@kms_fbcon_fbt@psr:
      shard-skl:          NOTRUN -> FAIL (fdo#107882)

    igt@kms_frontbuffer_tracking@fbc-1p-pri-indfb-multidraw:
      shard-skl:          NOTRUN -> FAIL (fdo#105682) +1

    igt@kms_frontbuffer_tracking@fbc-1p-primscrn-cur-indfb-draw-pwrite:
      shard-apl:          PASS -> FAIL (fdo#103167)

    igt@kms_frontbuffer_tracking@fbc-stridechange:
      shard-skl:          NOTRUN -> FAIL (fdo#105683)

    igt@kms_frontbuffer_tracking@fbcpsr-1p-rte:
      shard-skl:          PASS -> FAIL (fdo#105682)

    igt@kms_frontbuffer_tracking@psr-1p-primscrn-indfb-msflip-blt:
      shard-skl:          PASS -> FAIL (fdo#103167) +1

    igt@kms_frontbuffer_tracking@psr-1p-primscrn-spr-indfb-draw-pwrite:
      shard-skl:          NOTRUN -> FAIL (fdo#103167) +3

    igt@kms_plane@pixel-format-pipe-b-planes:
      shard-skl:          NOTRUN -> DMESG-WARN (fdo#106885) +2

    igt@kms_plane@plane-panning-bottom-right-suspend-pipe-b-planes:
      shard-skl:          PASS -> INCOMPLETE (fdo#104108)

    igt@kms_plane_alpha_blend@pipe-a-constant-alpha-max:
      shard-skl:          NOTRUN -> FAIL (fdo#108145) +5

    igt@kms_plane_alpha_blend@pipe-a-coverage-7efc:
      shard-skl:          PASS -> FAIL (fdo#108145, fdo#107815)

    igt@kms_plane_alpha_blend@pipe-b-alpha-opaque-fb:
      shard-glk:          NOTRUN -> FAIL (fdo#108145) +1

    igt@kms_plane_alpha_blend@pipe-c-alpha-7efc:
      shard-skl:          NOTRUN -> FAIL (fdo#108145, fdo#107815)

    igt@kms_plane_multiple@atomic-pipe-b-tiling-x:
      shard-apl:          PASS -> FAIL (fdo#103166) +1

    igt@kms_plane_multiple@atomic-pipe-c-tiling-yf:
      shard-glk:          PASS -> FAIL (fdo#103166)

    igt@kms_rotation_crc@primary-rotation-90:
      shard-skl:          NOTRUN -> FAIL (fdo#103925, fdo#107815)

    igt@kms_setmode@basic:
      shard-hsw:          PASS -> FAIL (fdo#99912)

    igt@kms_vblank@pipe-a-query-busy:
      shard-snb:          NOTRUN -> INCOMPLETE (fdo#105411)

    igt@pm_rpm@i2c:
      shard-skl:          PASS -> INCOMPLETE (fdo#107807)

    
    ==== Possible fixes ====

    igt@gem_exec_reuse@baggage:
      shard-apl:          DMESG-WARN (fdo#108690) -> PASS

    igt@gem_wait@write-busy-bsd:
      shard-snb:          INCOMPLETE (fdo#105411) -> PASS

    igt@kms_cursor_crc@cursor-256x256-sliding:
      shard-apl:          FAIL (fdo#103232) -> PASS

    igt@kms_frontbuffer_tracking@fbc-1p-primscrn-cur-indfb-draw-mmap-gtt:
      shard-apl:          FAIL (fdo#103167) -> PASS

    igt@kms_frontbuffer_tracking@fbc-1p-primscrn-spr-indfb-draw-mmap-gtt:
      shard-glk:          FAIL (fdo#103167) -> PASS

    igt@kms_plane@plane-panning-bottom-right-pipe-b-planes:
      shard-skl:          FAIL (fdo#103166) -> PASS

    
    ==== Warnings ====

    igt@kms_cursor_crc@cursor-256x256-suspend:
      shard-apl:          INCOMPLETE (fdo#103927) -> FAIL (fdo#103191, fdo#103232)

    
  {name}: This element is suppressed. This means it is ignored when computing
          the status of the difference (SUCCESS, WARNING, or FAILURE).

  fdo#103158 https://bugs.freedesktop.org/show_bug.cgi?id=103158
  fdo#103166 https://bugs.freedesktop.org/show_bug.cgi?id=103166
  fdo#103167 https://bugs.freedesktop.org/show_bug.cgi?id=103167
  fdo#103184 https://bugs.freedesktop.org/show_bug.cgi?id=103184
  fdo#103191 https://bugs.freedesktop.org/show_bug.cgi?id=103191
  fdo#103232 https://bugs.freedesktop.org/show_bug.cgi?id=103232
  fdo#103925 https://bugs.freedesktop.org/show_bug.cgi?id=103925
  fdo#103927 https://bugs.freedesktop.org/show_bug.cgi?id=103927
  fdo#104108 https://bugs.freedesktop.org/show_bug.cgi?id=104108
  fdo#104671 https://bugs.freedesktop.org/show_bug.cgi?id=104671
  fdo#105411 https://bugs.freedesktop.org/show_bug.cgi?id=105411
  fdo#105682 https://bugs.freedesktop.org/show_bug.cgi?id=105682
  fdo#105683 https://bugs.freedesktop.org/show_bug.cgi?id=105683
  fdo#106885 https://bugs.freedesktop.org/show_bug.cgi?id=106885
  fdo#106886 https://bugs.freedesktop.org/show_bug.cgi?id=106886
  fdo#107201 https://bugs.freedesktop.org/show_bug.cgi?id=107201
  fdo#107807 https://bugs.freedesktop.org/show_bug.cgi?id=107807
  fdo#107815 https://bugs.freedesktop.org/show_bug.cgi?id=107815
  fdo#107882 https://bugs.freedesktop.org/show_bug.cgi?id=107882
  fdo#107956 https://bugs.freedesktop.org/show_bug.cgi?id=107956
  fdo#108039 https://bugs.freedesktop.org/show_bug.cgi?id=108039
  fdo#108073 https://bugs.freedesktop.org/show_bug.cgi?id=108073
  fdo#108145 https://bugs.freedesktop.org/show_bug.cgi?id=108145
  fdo#108228 https://bugs.freedesktop.org/show_bug.cgi?id=108228
  fdo#108470 https://bugs.freedesktop.org/show_bug.cgi?id=108470
  fdo#108592 https://bugs.freedesktop.org/show_bug.cgi?id=108592
  fdo#108690 https://bugs.freedesktop.org/show_bug.cgi?id=108690
  fdo#99912 https://bugs.freedesktop.org/show_bug.cgi?id=99912


== Participating hosts (6 -> 6) ==

  No changes in participating hosts


== Build changes ==

    * Linux: CI_DRM_5107 -> Patchwork_10783

  CI_DRM_5107: b07f30fa49a617aa13678e39763bced4bf3a69e4 @ git://anongit.freedesktop.org/gfx-ci/linux
  IGT_4714: cab148ca3ec904a94d0cd43476cf7e1f8663f906 @ git://anongit.freedesktop.org/xorg/app/intel-gpu-tools
  Patchwork_10783: c3c450d594f20c61d20237f8b8aa3c5890d755d1 @ git://anongit.freedesktop.org/gfx-ci/linux
  piglit_4509: fdc5a4ca11124ab8413c7988896eec4c97336694 @ git://anongit.freedesktop.org/piglit

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_10783/shards.html
_______________________________________________
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Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx