drm/i915: Extract mode_changed computation out of stage_output_config()

This should make the conversion to atomic easier, by splitting the
initialization of the atomic state from the logic that decides if a
modeset is needed.

Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index b1f5038..3207b0c 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -12607,6 +12607,10 @@ static void
 intel_set_config_compute_mode_changes(struct drm_mode_set *set,
                                      struct intel_set_config *config)
 {
+       struct drm_device *dev = set->crtc->dev;
+       struct intel_connector *connector;
+       struct intel_encoder *encoder;
+       struct intel_crtc *crtc;
 
        /* We should be able to check here if the fb has the same properties
         * and then just flip_or_move it */
@@ -12650,6 +12654,36 @@ intel_set_config_compute_mode_changes(struct drm_mode_set *set,
                config->mode_changed = true;
        }
 
+       for_each_intel_connector(dev, connector) {
+               if (&connector->new_encoder->base == connector->base.encoder)
+                       continue;
+
+               config->mode_changed = true;
+               DRM_DEBUG_KMS("[CONNECTOR:%d:%s] encoder changed, full mode switch\n",
+                             connector->base.base.id,
+                             connector->base.name);
+       }
+
+       for_each_intel_encoder(dev, encoder) {
+               if (&encoder->new_crtc->base == encoder->base.crtc)
+                       continue;
+
+               DRM_DEBUG_KMS("[ENCODER:%d:%s] crtc changed, full mode switch\n",
+                             encoder->base.base.id,
+                             encoder->base.name);
+               config->mode_changed = true;
+       }
+
+       for_each_intel_crtc(dev, crtc) {
+               if (crtc->new_enabled == crtc->base.state->enable)
+                       continue;
+
+               DRM_DEBUG_KMS("[CRTC:%d] %sabled, full mode switch\n",
+                             crtc->base.base.id,
+                             crtc->new_enabled ? "en" : "dis");
+               config->mode_changed = true;
+       }
+
        DRM_DEBUG_KMS("computed changes for [CRTC:%d], mode_changed=%d, fb_changed=%d\n",
                        set->crtc->base.id, config->mode_changed, config->fb_changed);
 }
@@ -12657,7 +12691,6 @@ intel_set_config_compute_mode_changes(struct drm_mode_set *set,
 static int
 intel_modeset_stage_output_state(struct drm_device *dev,
                                 struct drm_mode_set *set,
-                                struct intel_set_config *config,
                                 struct drm_atomic_state *state)
 {
        struct intel_connector *connector;
@@ -12693,14 +12726,6 @@ intel_modeset_stage_output_state(struct drm_device *dev,
                                connector->base.base.id,
                                connector->base.name);
                }
-
-
-               if (&connector->new_encoder->base != connector->base.encoder) {
-                       DRM_DEBUG_KMS("[CONNECTOR:%d:%s] encoder changed, full mode switch\n",
-                                     connector->base.base.id,
-                                     connector->base.name);
-                       config->mode_changed = true;
-               }
        }
        /* connector->new_encoder is now updated for all connectors. */
 
@@ -12753,15 +12778,6 @@ intel_modeset_stage_output_state(struct drm_device *dev,
                        encoder->new_crtc = NULL;
                else if (num_connectors > 1)
                        return -EINVAL;
-
-               /* Only now check for crtc changes so we don't miss encoders
-                * that will be disabled. */
-               if (&encoder->new_crtc->base != encoder->base.crtc) {
-                       DRM_DEBUG_KMS("[ENCODER:%d:%s] crtc changed, full mode switch\n",
-                                     encoder->base.base.id,
-                                     encoder->base.name);
-                       config->mode_changed = true;
-               }
        }
        /* Now we've also updated encoder->new_crtc for all encoders. */
        for_each_intel_connector(dev, connector) {
@@ -12787,13 +12803,6 @@ intel_modeset_stage_output_state(struct drm_device *dev,
                                break;
                        }
                }
-
-               if (crtc->new_enabled != crtc->base.state->enable) {
-                       DRM_DEBUG_KMS("[CRTC:%d] %sabled, full mode switch\n",
-                                     crtc->base.base.id,
-                                     crtc->new_enabled ? "en" : "dis");
-                       config->mode_changed = true;
-               }
        }
 
        return 0;
@@ -12865,12 +12874,6 @@ static int intel_crtc_set_config(struct drm_mode_set *set)
        save_set.y = set->crtc->y;
        save_set.fb = set->crtc->primary->fb;
 
-       /* Compute whether we need a full modeset, only an fb base update or no
-        * change at all. In the future we might also check whether only the
-        * mode changed, e.g. for LVDS where we only change the panel fitter in
-        * such cases. */
-       intel_set_config_compute_mode_changes(set, config);
-
        state = drm_atomic_state_alloc(dev);
        if (!state) {
                ret = -ENOMEM;
@@ -12879,10 +12882,16 @@ static int intel_crtc_set_config(struct drm_mode_set *set)
 
        state->acquire_ctx = dev->mode_config.acquire_ctx;
 
-       ret = intel_modeset_stage_output_state(dev, set, config, state);
+       ret = intel_modeset_stage_output_state(dev, set, state);
        if (ret)
                goto fail;
 
+       /* Compute whether we need a full modeset, only an fb base update or no
+        * change at all. In the future we might also check whether only the
+        * mode changed, e.g. for LVDS where we only change the panel fitter in
+        * such cases. */
+       intel_set_config_compute_mode_changes(set, config);
+
        pipe_config = intel_modeset_compute_config(set->crtc, set->mode,
                                                   state,
                                                   &modeset_pipes,