If one of the synced crtcs needs a full modeset, we need
to make sure all the synced crtcs are forced a full
modeset.

v3:
* Remove ~BIT(cpu_trans) which is a nop (Ville)
* use get_new_crtc_state and remove error check (Ville)

v2:
* Add tiles based on cpu_trans check (Ville)

Suggested-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
Cc: Ville Syrjälä <ville.syrj...@linux.intel.com>
Signed-off-by: Manasi Navare <manasi.d.nav...@intel.com>
Reviewed-by:  Ville Syrjälä <ville.syrj...@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c |  85 ------------
 drivers/gpu/drm/i915/display/intel_dp.c      | 136 ++++++++++++++++++-
 2 files changed, 135 insertions(+), 86 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c 
b/drivers/gpu/drm/i915/display/intel_display.c
index c8615f212e8f..8693585d8d88 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -14694,76 +14694,6 @@ static bool intel_cpu_transcoders_need_modeset(struct 
intel_atomic_state *state,
        return false;
 }
 
-static int
-intel_modeset_all_tiles(struct intel_atomic_state *state, int tile_grp_id)
-{
-       struct drm_i915_private *dev_priv = to_i915(state->base.dev);
-       struct drm_connector *connector;
-       struct drm_connector_list_iter conn_iter;
-       int ret = 0;
-
-       drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter);
-       drm_for_each_connector_iter(connector, &conn_iter) {
-               struct drm_connector_state *conn_state;
-               struct drm_crtc_state *crtc_state;
-
-               if (!connector->has_tile ||
-                   connector->tile_group->id != 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;
-
-               crtc_state = drm_atomic_get_crtc_state(&state->base,
-                                                      conn_state->crtc);
-               if (IS_ERR(crtc_state)) {
-                       ret = PTR_ERR(crtc_state);
-                       break;
-               }
-               crtc_state->mode_changed = true;
-               ret = drm_atomic_add_affected_connectors(&state->base,
-                                                        conn_state->crtc);
-               if (ret)
-                       break;
-       }
-       drm_connector_list_iter_end(&conn_iter);
-
-       return ret;
-}
-
-static int
-intel_atomic_check_tiled_conns(struct intel_atomic_state *state)
-{
-       struct drm_i915_private *dev_priv = to_i915(state->base.dev);
-       struct drm_connector *connector;
-       struct drm_connector_state *old_conn_state, *new_conn_state;
-       int i, ret;
-
-       if (INTEL_GEN(dev_priv) < 11)
-               return 0;
-
-       /* Is tiled, mark all other tiled CRTCs as needing a modeset */
-       for_each_oldnew_connector_in_state(&state->base, connector,
-                                          old_conn_state, new_conn_state, i) {
-               if (!connector->has_tile)
-                       continue;
-               if (!intel_connector_needs_modeset(state, connector))
-                       continue;
-
-               ret = intel_modeset_all_tiles(state, connector->tile_group->id);
-               if (ret)
-                       return ret;
-       }
-
-       return 0;
-}
-
 /**
  * intel_atomic_check - validate state object
  * @dev: drm device
@@ -14792,21 +14722,6 @@ static int intel_atomic_check(struct drm_device *dev,
        if (ret)
                goto fail;
 
-       /**
-        * This check adds all the connectors in current state that belong to
-        * the same tile group to a full modeset.
-        * This function directly sets the mode_changed to true and we also call
-        * drm_atomic_add_affected_connectors(). Hence we are not explicitly
-        * calling drm_atomic_helper_check_modeset() after this.
-        *
-        * Fixme: Handle some corner cases where one of the
-        * tiled connectors gets disconnected and tile info is lost but since it
-        * was previously synced to other conn, we need to add that to the 
modeset.
-        */
-       ret = intel_atomic_check_tiled_conns(state);
-       if (ret)
-               goto fail;
-
        for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
                                            new_crtc_state, i) {
                if (!needs_modeset(new_crtc_state)) {
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c 
b/drivers/gpu/drm/i915/display/intel_dp.c
index f4dede6253f8..27ffbaab8296 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -6582,6 +6582,140 @@ void intel_dp_encoder_reset(struct drm_encoder *encoder)
        }
 }
 
+static int intel_modeset_tile_group(struct intel_atomic_state *state,
+                                   int tile_group_id)
+{
+       struct drm_i915_private *dev_priv = to_i915(state->base.dev);
+       struct drm_connector_list_iter conn_iter;
+       struct drm_connector *connector;
+       int ret = 0;
+
+       drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter);
+       drm_for_each_connector_iter(connector, &conn_iter) {
+               struct drm_connector_state *conn_state;
+               struct intel_crtc_state *crtc_state;
+               struct intel_crtc *crtc;
+
+               if (!connector->has_tile ||
+                   connector->tile_group->id != tile_group_id)
+                       continue;
+
+               conn_state = drm_atomic_get_connector_state(&state->base,
+                                                           connector);
+               if (IS_ERR(conn_state)) {
+                       ret = PTR_ERR(conn_state);
+                       break;
+               }
+
+               crtc = to_intel_crtc(conn_state->crtc);
+
+               if (!crtc)
+                       continue;
+
+               crtc_state = intel_atomic_get_new_crtc_state(state, crtc);
+               crtc_state->uapi.mode_changed = true;
+
+               ret = drm_atomic_add_affected_planes(&state->base, &crtc->base);
+               if (ret)
+                       break;
+       }
+       drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter);
+
+       return ret;
+}
+
+static int intel_modeset_affected_transcoders(struct intel_atomic_state 
*state, u8 transcoders)
+{
+       struct drm_i915_private *dev_priv = to_i915(state->base.dev);
+       struct intel_crtc *crtc;
+
+       if (transcoders == 0)
+               return 0;
+
+       for_each_intel_crtc(&dev_priv->drm, crtc) {
+               struct intel_crtc_state *crtc_state;
+               int ret;
+
+               crtc_state = intel_atomic_get_crtc_state(&state->base, crtc);
+               if (IS_ERR(crtc_state))
+                       return PTR_ERR(crtc_state);
+
+               if (!crtc_state->hw.enable)
+                       continue;
+
+               if (!(transcoders & BIT(crtc_state->cpu_transcoder)))
+                       continue;
+
+               crtc_state->uapi.mode_changed = true;
+
+               ret = drm_atomic_add_affected_connectors(&state->base, 
&crtc->base);
+               if (ret)
+                       return ret;
+
+               ret = drm_atomic_add_affected_planes(&state->base, &crtc->base);
+               if (ret)
+                       return ret;
+
+               transcoders &= ~BIT(crtc_state->cpu_transcoder);
+       }
+
+       WARN_ON(transcoders != 0);
+
+       return 0;
+}
+
+static int intel_modeset_synced_crtcs(struct intel_atomic_state *state,
+                                     struct drm_connector *connector)
+{
+       const struct drm_connector_state *old_conn_state =
+               drm_atomic_get_old_connector_state(&state->base, connector);
+       const struct intel_crtc_state *old_crtc_state;
+       struct intel_crtc *crtc;
+       u8 transcoders;
+
+       crtc = to_intel_crtc(old_conn_state->crtc);
+       if (!crtc)
+               return 0;
+
+       old_crtc_state = intel_atomic_get_old_crtc_state(state, crtc);
+
+       if (!old_crtc_state->hw.active)
+               return 0;
+
+       transcoders = old_crtc_state->sync_mode_slaves_mask;
+       if (old_crtc_state->master_transcoder != INVALID_TRANSCODER)
+               transcoders |= BIT(old_crtc_state->master_transcoder);
+
+       return intel_modeset_affected_transcoders(state,
+                                                 transcoders);
+}
+
+static int intel_dp_connector_atomic_check(struct drm_connector *conn,
+                                          struct drm_atomic_state *_state)
+{
+       struct drm_i915_private *dev_priv = to_i915(conn->dev);
+       struct intel_atomic_state *state = to_intel_atomic_state(_state);
+       int ret;
+
+       ret = intel_digital_connector_atomic_check(conn, &state->base);
+       if (ret)
+               return ret;
+
+       if (INTEL_GEN(dev_priv) < 11)
+               return 0;
+
+       if (!intel_connector_needs_modeset(state, conn))
+               return 0;
+
+       if (conn->has_tile) {
+               ret = intel_modeset_tile_group(state, conn->tile_group->id);
+               if (ret)
+                       return ret;
+       }
+
+       return intel_modeset_synced_crtcs(state, conn);
+}
+
 static const struct drm_connector_funcs intel_dp_connector_funcs = {
        .force = intel_dp_force,
        .fill_modes = drm_helper_probe_single_connector_modes,
@@ -6598,7 +6732,7 @@ static const struct drm_connector_helper_funcs 
intel_dp_connector_helper_funcs =
        .detect_ctx = intel_dp_detect,
        .get_modes = intel_dp_get_modes,
        .mode_valid = intel_dp_mode_valid,
-       .atomic_check = intel_digital_connector_atomic_check,
+       .atomic_check = intel_dp_connector_atomic_check,
 };
 
 static const struct drm_encoder_funcs intel_dp_enc_funcs = {
-- 
2.19.1

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