drm/i915: Pass atomic states to fbc update functions.

This is required to let fbc updates run async. It has a lot of
checks whether certain locks are taken, which can be removed when
the relevant states are passed in as pointers.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1463490484-19540-17-git-send-email-maarten.lankhorst@linux.intel.com
Reviewed-by: Patrik Jakobsson <patrik.jakobsson@linux.intel.com>

3 files changed, 29 insertions, 26 deletions

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 11f427f48466..39493f15843e 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4589,7 +4589,7 @@ static void intel_pre_plane_update(struct intel_crtc_state *old_crtc_state)
                 struct intel_plane_state *old_primary_state =
                         to_intel_plane_state(old_pri_state);
 
-                intel_fbc_pre_update(crtc);
+                intel_fbc_pre_update(crtc, pipe_config, primary_state);
 
                 if (old_primary_state->visible &&
                     (modeset || !primary_state->visible))
@@ -11169,7 +11169,9 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
         if (obj->base.dma_buf)
                 work->old_plane_state[0]->base.fence = intel_get_excl_fence(obj);
 
-        intel_fbc_pre_update(intel_crtc);
+        intel_fbc_pre_update(intel_crtc,
+                             to_intel_crtc_state(new_crtc_state),
+                             to_intel_plane_state(new_state));
 
         schedule_work(&work->mmio_work);
 
@@ -13126,7 +13128,7 @@ static int intel_atomic_commit(struct drm_device *dev,
 
                 if (crtc->state->active &&
                     drm_atomic_get_existing_plane_state(state, crtc->primary))
-                        intel_fbc_enable(intel_crtc);
+                        intel_fbc_enable(intel_crtc, pipe_config, to_intel_plane_state(crtc->primary->state));
 
                 if (crtc->state->active &&
                     (crtc->state->planes_changed || update_pipe))
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 3eb1f2f01ba3..dae78f410a80 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1420,11 +1420,15 @@ static inline void intel_fbdev_restore_mode(struct drm_device *dev)
 void intel_fbc_choose_crtc(struct drm_i915_private *dev_priv,
                            struct drm_atomic_state *state);
 bool intel_fbc_is_active(struct drm_i915_private *dev_priv);
-void intel_fbc_pre_update(struct intel_crtc *crtc);
+void intel_fbc_pre_update(struct intel_crtc *crtc,
+                          struct intel_crtc_state *crtc_state,
+                          struct intel_plane_state *plane_state);
 void intel_fbc_post_update(struct intel_crtc *crtc);
 void intel_fbc_init(struct drm_i915_private *dev_priv);
 void intel_fbc_init_pipe_state(struct drm_i915_private *dev_priv);
-void intel_fbc_enable(struct intel_crtc *crtc);
+void intel_fbc_enable(struct intel_crtc *crtc,
+                      struct intel_crtc_state *crtc_state,
+                      struct intel_plane_state *plane_state);
 void intel_fbc_disable(struct intel_crtc *crtc);
 void intel_fbc_global_disable(struct drm_i915_private *dev_priv);
 void intel_fbc_invalidate(struct drm_i915_private *dev_priv,
diff --git a/drivers/gpu/drm/i915/intel_fbc.c b/drivers/gpu/drm/i915/intel_fbc.c
index 0dea5fbcd8aa..d2b0269b2fe4 100644
--- a/drivers/gpu/drm/i915/intel_fbc.c
+++ b/drivers/gpu/drm/i915/intel_fbc.c
@@ -480,10 +480,10 @@ static void intel_fbc_deactivate(struct drm_i915_private *dev_priv)
                 intel_fbc_hw_deactivate(dev_priv);
 }
 
-static bool multiple_pipes_ok(struct intel_crtc *crtc)
+static bool multiple_pipes_ok(struct intel_crtc *crtc,
+                              struct intel_plane_state *plane_state)
 {
-        struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
-        struct drm_plane *primary = crtc->base.primary;
+        struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
         struct intel_fbc *fbc = &dev_priv->fbc;
         enum pipe pipe = crtc->pipe;
 
@@ -491,9 +491,7 @@ static bool multiple_pipes_ok(struct intel_crtc *crtc)
         if (!no_fbc_on_multiple_pipes(dev_priv))
                 return true;
 
-        WARN_ON(!drm_modeset_is_locked(&primary->mutex));
-
-        if (to_intel_plane_state(primary->state)->visible)
+        if (plane_state->visible)
                 fbc->visible_pipes_mask |= (1 << pipe);
         else
                 fbc->visible_pipes_mask &= ~(1 << pipe);
@@ -708,21 +706,16 @@ static bool intel_fbc_hw_tracking_covers_screen(struct intel_crtc *crtc)
         return effective_w <= max_w && effective_h <= max_h;
 }
 
-static void intel_fbc_update_state_cache(struct intel_crtc *crtc)
+static void intel_fbc_update_state_cache(struct intel_crtc *crtc,
+                                         struct intel_crtc_state *crtc_state,
+                                         struct intel_plane_state *plane_state)
 {
         struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
         struct intel_fbc *fbc = &dev_priv->fbc;
         struct intel_fbc_state_cache *cache = &fbc->state_cache;
-        struct intel_crtc_state *crtc_state =
-                to_intel_crtc_state(crtc->base.state);
-        struct intel_plane_state *plane_state =
-                to_intel_plane_state(crtc->base.primary->state);
         struct drm_framebuffer *fb = plane_state->base.fb;
         struct drm_i915_gem_object *obj;
 
-        WARN_ON(!drm_modeset_is_locked(&crtc->base.mutex));
-        WARN_ON(!drm_modeset_is_locked(&crtc->base.primary->mutex));
-
         cache->crtc.mode_flags = crtc_state->base.adjusted_mode.flags;
         if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
                 cache->crtc.hsw_bdw_pixel_rate =
@@ -887,7 +880,9 @@ static bool intel_fbc_reg_params_equal(struct intel_fbc_reg_params *params1,
         return memcmp(params1, params2, sizeof(*params1)) == 0;
 }
 
-void intel_fbc_pre_update(struct intel_crtc *crtc)
+void intel_fbc_pre_update(struct intel_crtc *crtc,
+                          struct intel_crtc_state *crtc_state,
+                          struct intel_plane_state *plane_state)
 {
         struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
         struct intel_fbc *fbc = &dev_priv->fbc;
@@ -897,7 +892,7 @@ void intel_fbc_pre_update(struct intel_crtc *crtc)
 
         mutex_lock(&fbc->lock);
 
-        if (!multiple_pipes_ok(crtc)) {
+        if (!multiple_pipes_ok(crtc, plane_state)) {
                 fbc->no_fbc_reason = "more than one pipe active";
                 goto deactivate;
         }
@@ -905,7 +900,7 @@ void intel_fbc_pre_update(struct intel_crtc *crtc)
         if (!fbc->enabled || fbc->crtc != crtc)
                 goto unlock;
 
-        intel_fbc_update_state_cache(crtc);
+        intel_fbc_update_state_cache(crtc, crtc_state, plane_state);
 
 deactivate:
         intel_fbc_deactivate(dev_priv);
@@ -1089,7 +1084,9 @@ out:
  * intel_fbc_enable multiple times for the same pipe without an
  * intel_fbc_disable in the middle, as long as it is deactivated.
  */
-void intel_fbc_enable(struct intel_crtc *crtc)
+void intel_fbc_enable(struct intel_crtc *crtc,
+                      struct intel_crtc_state *crtc_state,
+                      struct intel_plane_state *plane_state)
 {
         struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
         struct intel_fbc *fbc = &dev_priv->fbc;
@@ -1102,19 +1099,19 @@ void intel_fbc_enable(struct intel_crtc *crtc)
         if (fbc->enabled) {
                 WARN_ON(fbc->crtc == NULL);
                 if (fbc->crtc == crtc) {
-                        WARN_ON(!crtc->config->enable_fbc);
+                        WARN_ON(!crtc_state->enable_fbc);
                         WARN_ON(fbc->active);
                 }
                 goto out;
         }
 
-        if (!crtc->config->enable_fbc)
+        if (!crtc_state->enable_fbc)
                 goto out;
 
         WARN_ON(fbc->active);
         WARN_ON(fbc->crtc != NULL);
 
-        intel_fbc_update_state_cache(crtc);
+        intel_fbc_update_state_cache(crtc, crtc_state, plane_state);
         if (intel_fbc_alloc_cfb(crtc)) {
                 fbc->no_fbc_reason = "not enough stolen memory";
                 goto out;