In case of tiled connectors if one of the tiled connectors in state
needs a full modeset we add other tiled connectors to the state. Make sure
that the connector has a CRTC before forcing a modeset on that else it fails
committing the state.

Cc: Ville Syrjälä <[email protected]>
Fixes: a603f5bd1691 ("drm/i915/dp: Make sure all tiled connectors get added to 
the state with full modeset")
Closes: https://gitlab.freedesktop.org/drm/intel/issues/516
Signed-off-by: Manasi Navare <[email protected]>
Acked-by: Ville Syrjälä <[email protected]>
---
 drivers/gpu/drm/i915/display/intel_display.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c 
b/drivers/gpu/drm/i915/display/intel_display.c
index 32c6940c9077..81addaea616b 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -13155,11 +13155,12 @@ intel_modeset_pipe_config(struct intel_crtc_state 
*pipe_config)
        }
 
        /* Get total number of tiled connectors in state that belong to
-        * this tile group.
+        * this tile group and that have a CRTC
         */
        for_each_new_connector_in_state(state, connector, connector_state, i) {
                if (connector->has_tile &&
-                   connector->tile_group->id == tile_group_id)
+                   connector->tile_group->id == tile_group_id &&
+                   connector_state->crtc)
                        num_tiled_conns++;
        }
 
@@ -14506,13 +14507,14 @@ intel_modeset_all_tiles(struct intel_atomic_state 
*state, int tile_grp_id)
                        continue;
                conn_state = drm_atomic_get_connector_state(&state->base,
                                                            connector);
+
                if (IS_ERR(conn_state)) {
                        ret =  PTR_ERR(conn_state);
                        break;
                }
 
                if (!conn_state->crtc)
-                       continue;
+                       break;
 
                crtc_state = drm_atomic_get_crtc_state(&state->base,
                                                       conn_state->crtc);
@@ -14549,6 +14551,8 @@ intel_atomic_check_tiled_conns(struct 
intel_atomic_state *state)
                        continue;
                if (!intel_connector_needs_modeset(state, connector))
                        continue;
+               if (!new_conn_state->crtc)
+                       continue;
 
                ret = intel_modeset_all_tiles(state, connector->tile_group->id);
                if (ret)
-- 
2.19.1

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