This removes the need to separately track fb changes i915.
    
Changes since v1:
- Add dri-devel to cc.
- Fix a check in intel's prepare and cleanup fb to take rotation
  into account.
    
Cc: dri-de...@lists.freedesktop.org
Signed-off-by: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
---
diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c 
b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c
index be9fa8220499..36fda86b3518 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c
@@ -712,11 +712,13 @@ static int atmel_hlcdc_plane_atomic_check(struct 
drm_plane *p,
 }
 
 static int atmel_hlcdc_plane_prepare_fb(struct drm_plane *p,
-                                       struct drm_framebuffer *fb,
                                        const struct drm_plane_state *new_state)
 {
        struct atmel_hlcdc_plane *plane = drm_plane_to_atmel_hlcdc_plane(p);
 
+       if (!new_state->fb)
+               return 0;
+
        return atmel_hlcdc_layer_update_start(&plane->layer);
 }
 
diff --git a/drivers/gpu/drm/drm_atomic_helper.c 
b/drivers/gpu/drm/drm_atomic_helper.c
index 0898afbc9e23..e52dfc828e60 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -1063,17 +1063,14 @@ int drm_atomic_helper_prepare_planes(struct drm_device 
*dev,
                const struct drm_plane_helper_funcs *funcs;
                struct drm_plane *plane = state->planes[i];
                struct drm_plane_state *plane_state = state->plane_states[i];
-               struct drm_framebuffer *fb;
 
                if (!plane)
                        continue;
 
                funcs = plane->helper_private;
 
-               fb = plane_state->fb;
-
-               if (fb && funcs->prepare_fb) {
-                       ret = funcs->prepare_fb(plane, fb, plane_state);
+               if (funcs->prepare_fb) {
+                       ret = funcs->prepare_fb(plane, plane_state);
                        if (ret)
                                goto fail;
                }
@@ -1086,17 +1083,14 @@ fail:
                const struct drm_plane_helper_funcs *funcs;
                struct drm_plane *plane = state->planes[i];
                struct drm_plane_state *plane_state = state->plane_states[i];
-               struct drm_framebuffer *fb;
 
                if (!plane)
                        continue;
 
                funcs = plane->helper_private;
 
-               fb = state->plane_states[i]->fb;
-
-               if (fb && funcs->cleanup_fb)
-                       funcs->cleanup_fb(plane, fb, plane_state);
+               if (funcs->cleanup_fb)
+                       funcs->cleanup_fb(plane, plane_state);
 
        }
 
@@ -1252,14 +1246,11 @@ void drm_atomic_helper_cleanup_planes(struct drm_device 
*dev,
 
        for_each_plane_in_state(old_state, plane, plane_state, i) {
                const struct drm_plane_helper_funcs *funcs;
-               struct drm_framebuffer *old_fb;
 
                funcs = plane->helper_private;
 
-               old_fb = plane_state->fb;
-
-               if (old_fb && funcs->cleanup_fb)
-                       funcs->cleanup_fb(plane, old_fb, plane_state);
+               if (funcs->cleanup_fb)
+                       funcs->cleanup_fb(plane, plane_state);
        }
 }
 EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes);
diff --git a/drivers/gpu/drm/drm_plane_helper.c 
b/drivers/gpu/drm/drm_plane_helper.c
index b07a213f5655..03b7afe455e6 100644
--- a/drivers/gpu/drm/drm_plane_helper.c
+++ b/drivers/gpu/drm/drm_plane_helper.c
@@ -425,7 +425,7 @@ int drm_plane_helper_commit(struct drm_plane *plane,
 
        if (plane_funcs->prepare_fb && plane_state->fb &&
            plane_state->fb != old_fb) {
-               ret = plane_funcs->prepare_fb(plane, plane_state->fb,
+               ret = plane_funcs->prepare_fb(plane,
                                              plane_state);
                if (ret)
                        goto out;
@@ -478,8 +478,8 @@ int drm_plane_helper_commit(struct drm_plane *plane,
                ret = 0;
        }
 
-       if (plane_funcs->cleanup_fb && old_fb)
-               plane_funcs->cleanup_fb(plane, old_fb, plane_state);
+       if (plane_funcs->cleanup_fb)
+               plane_funcs->cleanup_fb(plane, plane_state);
 out:
        if (plane_state) {
                if (plane->funcs->atomic_destroy_state)
diff --git a/drivers/gpu/drm/i915/intel_display.c 
b/drivers/gpu/drm/i915/intel_display.c
index 7dbfeacf0f38..b3990264e137 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4775,17 +4775,6 @@ static void intel_pre_plane_update(struct intel_crtc 
*crtc)
        struct drm_device *dev = crtc->base.dev;
        struct drm_i915_private *dev_priv = dev->dev_private;
        struct intel_crtc_atomic_commit *atomic = &crtc->atomic;
-       struct drm_plane *p;
-
-       /* Track fb's for any planes being disabled */
-       drm_for_each_plane_mask(p, dev, atomic->disabled_planes) {
-               struct intel_plane *plane = to_intel_plane(p);
-
-               mutex_lock(&dev->struct_mutex);
-               i915_gem_track_fb(intel_fb_obj(plane->base.fb), NULL,
-                                 plane->frontbuffer_bit);
-               mutex_unlock(&dev->struct_mutex);
-       }
 
        if (atomic->wait_for_flips)
                intel_crtc_wait_for_pending_flips(&crtc->base);
@@ -11668,14 +11657,6 @@ int intel_plane_atomic_calc_changes(struct 
drm_crtc_state *crtc_state,
                        return ret;
        }
 
-       /*
-        * Disabling a plane is always okay; we just need to update
-        * fb tracking in a special way since cleanup_fb() won't
-        * get called by the plane helpers.
-        */
-       if (old_plane_state->base.fb && !fb)
-               intel_crtc->atomic.disabled_planes |= 1 << i;
-
        was_visible = old_plane_state->visible;
        visible = to_intel_plane_state(plane_state)->visible;
 
@@ -13479,21 +13460,26 @@ static void intel_shared_dpll_init(struct drm_device 
*dev)
  */
 int
 intel_prepare_plane_fb(struct drm_plane *plane,
-                      struct drm_framebuffer *fb,
                       const struct drm_plane_state *new_state)
 {
        struct drm_device *dev = plane->dev;
+       struct drm_framebuffer *fb = new_state->fb;
        struct intel_plane *intel_plane = to_intel_plane(plane);
        struct drm_i915_gem_object *obj = intel_fb_obj(fb);
-       struct drm_i915_gem_object *old_obj = intel_fb_obj(plane->fb);
+       struct drm_i915_gem_object *old_obj = intel_fb_obj(plane->state->fb);
        int ret = 0;
 
-       if (!obj)
+       if (!obj && !old_obj)
+               return 0;
+
+       if (obj == old_obj && new_state->rotation == plane->state->rotation)
                return 0;
 
        mutex_lock(&dev->struct_mutex);
 
-       if (plane->type == DRM_PLANE_TYPE_CURSOR &&
+       if (!obj) {
+               ret = 0;
+       } else if (plane->type == DRM_PLANE_TYPE_CURSOR &&
            INTEL_INFO(dev)->cursor_needs_physical) {
                int align = IS_I830(dev) ? 16 * 1024 : 256;
                ret = i915_gem_object_attach_phys(obj, align);
@@ -13520,21 +13506,29 @@ intel_prepare_plane_fb(struct drm_plane *plane,
  */
 void
 intel_cleanup_plane_fb(struct drm_plane *plane,
-                      struct drm_framebuffer *fb,
                       const struct drm_plane_state *old_state)
 {
        struct drm_device *dev = plane->dev;
-       struct drm_i915_gem_object *obj = intel_fb_obj(fb);
+       struct intel_plane *intel_plane = to_intel_plane(plane);
+       struct drm_i915_gem_object *old_obj = intel_fb_obj(old_state->fb);
+       struct drm_i915_gem_object *obj = intel_fb_obj(plane->fb);
 
-       if (WARN_ON(!obj))
+       if (!obj && !old_obj)
                return;
 
-       if (plane->type != DRM_PLANE_TYPE_CURSOR ||
-           !INTEL_INFO(dev)->cursor_needs_physical) {
-               mutex_lock(&dev->struct_mutex);
-               intel_unpin_fb_obj(fb, old_state);
-               mutex_unlock(&dev->struct_mutex);
-       }
+       if (obj == old_obj && old_state->rotation == plane->state->rotation)
+               return;
+
+       mutex_lock(&dev->struct_mutex);
+       if (old_obj && (plane->type != DRM_PLANE_TYPE_CURSOR ||
+           !INTEL_INFO(dev)->cursor_needs_physical))
+               intel_unpin_fb_obj(old_state->fb, old_state);
+
+       /* prepare_fb aborted? */
+       if ((old_obj && (old_obj->frontbuffer_bits & 
intel_plane->frontbuffer_bit)) ||
+           (obj && !(obj->frontbuffer_bits & intel_plane->frontbuffer_bit)))
+               i915_gem_track_fb(old_obj, obj, intel_plane->frontbuffer_bit);
+       mutex_unlock(&dev->struct_mutex);
 }
 
 int
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 3b00d00c0bc0..bee8a9669482 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -497,7 +497,6 @@ struct intel_crtc_atomic_commit {
        bool disable_cxsr;
        bool pre_disable_primary;
        bool update_wm_pre, update_wm_post;
-       unsigned disabled_planes;
 
        /* Sleepable operations to perform after commit */
        unsigned fb_bits;
@@ -1039,10 +1038,8 @@ void intel_finish_page_flip(struct drm_device *dev, int 
pipe);
 void intel_finish_page_flip_plane(struct drm_device *dev, int plane);
 void intel_check_page_flip(struct drm_device *dev, int pipe);
 int intel_prepare_plane_fb(struct drm_plane *plane,
-                          struct drm_framebuffer *fb,
                           const struct drm_plane_state *new_state);
 void intel_cleanup_plane_fb(struct drm_plane *plane,
-                           struct drm_framebuffer *fb,
                            const struct drm_plane_state *old_state);
 int intel_plane_atomic_get_property(struct drm_plane *plane,
                                    const struct drm_plane_state *state,
diff --git a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_plane.c 
b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_plane.c
index 0d1dbb737933..60e83c3765c2 100644
--- a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_plane.c
+++ b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_plane.c
@@ -98,22 +98,28 @@ static const struct drm_plane_funcs mdp4_plane_funcs = {
 };
 
 static int mdp4_plane_prepare_fb(struct drm_plane *plane,
-               struct drm_framebuffer *fb,
                const struct drm_plane_state *new_state)
 {
        struct mdp4_plane *mdp4_plane = to_mdp4_plane(plane);
        struct mdp4_kms *mdp4_kms = get_kms(plane);
+       struct drm_framebuffer *fb = new_state->fb;
+
+       if (!fb)
+               return 0;
 
        DBG("%s: prepare: FB[%u]", mdp4_plane->name, fb->base.id);
        return msm_framebuffer_prepare(fb, mdp4_kms->id);
 }
 
 static void mdp4_plane_cleanup_fb(struct drm_plane *plane,
-               struct drm_framebuffer *fb,
                const struct drm_plane_state *old_state)
 {
        struct mdp4_plane *mdp4_plane = to_mdp4_plane(plane);
        struct mdp4_kms *mdp4_kms = get_kms(plane);
+       struct drm_framebuffer *fb = old_state->fb;
+
+       if (!fb)
+               return;
 
        DBG("%s: cleanup: FB[%u]", mdp4_plane->name, fb->base.id);
        msm_framebuffer_cleanup(fb, mdp4_kms->id);
diff --git a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c 
b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c
index 57b8f56ae9d0..d0f627b962f3 100644
--- a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c
+++ b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c
@@ -156,11 +156,14 @@ static const struct drm_plane_funcs mdp5_plane_funcs = {
 };
 
 static int mdp5_plane_prepare_fb(struct drm_plane *plane,
-               struct drm_framebuffer *fb,
                const struct drm_plane_state *new_state)
 {
        struct mdp5_plane *mdp5_plane = to_mdp5_plane(plane);
        struct mdp5_kms *mdp5_kms = get_kms(plane);
+       struct drm_framebuffer *fb = new_state->fb;
+
+       if (!new_state->fb)
+               return 0;
 
        DBG("%s: prepare: FB[%u]", mdp5_plane->name, fb->base.id);
        return msm_framebuffer_prepare(fb, mdp5_kms->id);
@@ -172,6 +175,10 @@ static void mdp5_plane_cleanup_fb(struct drm_plane *plane,
 {
        struct mdp5_plane *mdp5_plane = to_mdp5_plane(plane);
        struct mdp5_kms *mdp5_kms = get_kms(plane);
+       struct drm_framebuffer *fb = old_state->fb;
+
+       if (!fb)
+               return;
 
        DBG("%s: cleanup: FB[%u]", mdp5_plane->name, fb->base.id);
        msm_framebuffer_cleanup(fb, mdp5_kms->id);
diff --git a/drivers/gpu/drm/omapdrm/omap_plane.c 
b/drivers/gpu/drm/omapdrm/omap_plane.c
index 098904696a5c..09e363bb55f2 100644
--- a/drivers/gpu/drm/omapdrm/omap_plane.c
+++ b/drivers/gpu/drm/omapdrm/omap_plane.c
@@ -60,17 +60,19 @@ to_omap_plane_state(struct drm_plane_state *state)
 }
 
 static int omap_plane_prepare_fb(struct drm_plane *plane,
-                                struct drm_framebuffer *fb,
                                 const struct drm_plane_state *new_state)
 {
-       return omap_framebuffer_pin(fb);
+       if (!new_state->fb)
+               return 0;
+
+       return omap_framebuffer_pin(new_state->fb);
 }
 
 static void omap_plane_cleanup_fb(struct drm_plane *plane,
-                                 struct drm_framebuffer *fb,
                                  const struct drm_plane_state *old_state)
 {
-       omap_framebuffer_unpin(fb);
+       if (old_state->fb)
+               omap_framebuffer_unpin(old_state->fb);
 }
 
 static void omap_plane_atomic_update(struct drm_plane *plane,
diff --git a/drivers/gpu/drm/sti/sti_drm_plane.c 
b/drivers/gpu/drm/sti/sti_drm_plane.c
index 64d4ed43dda3..f3717292e748 100644
--- a/drivers/gpu/drm/sti/sti_drm_plane.c
+++ b/drivers/gpu/drm/sti/sti_drm_plane.c
@@ -147,14 +147,12 @@ static struct drm_plane_funcs sti_drm_plane_funcs = {
 };
 
 static int sti_drm_plane_prepare_fb(struct drm_plane *plane,
-                                 struct drm_framebuffer *fb,
                                  const struct drm_plane_state *new_state)
 {
        return 0;
 }
 
 static void sti_drm_plane_cleanup_fb(struct drm_plane *plane,
-                                  struct drm_framebuffer *fb,
                                   const struct drm_plane_state *old_fb)
 {
 }
diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
index a287e4fec865..d447701173e6 100644
--- a/drivers/gpu/drm/tegra/dc.c
+++ b/drivers/gpu/drm/tegra/dc.c
@@ -472,14 +472,12 @@ static const struct drm_plane_funcs 
tegra_primary_plane_funcs = {
 };
 
 static int tegra_plane_prepare_fb(struct drm_plane *plane,
-                                 struct drm_framebuffer *fb,
                                  const struct drm_plane_state *new_state)
 {
        return 0;
 }
 
 static void tegra_plane_cleanup_fb(struct drm_plane *plane,
-                                  struct drm_framebuffer *fb,
                                   const struct drm_plane_state *old_fb)
 {
 }
diff --git a/include/drm/drm_plane_helper.h b/include/drm/drm_plane_helper.h
index 96e16283afb9..5ffca4e51e40 100644
--- a/include/drm/drm_plane_helper.h
+++ b/include/drm/drm_plane_helper.h
@@ -59,10 +59,8 @@ extern int drm_crtc_init(struct drm_device *dev,
  */
 struct drm_plane_helper_funcs {
        int (*prepare_fb)(struct drm_plane *plane,
-                         struct drm_framebuffer *fb,
                          const struct drm_plane_state *new_state);
        void (*cleanup_fb)(struct drm_plane *plane,
-                          struct drm_framebuffer *fb,
                           const struct drm_plane_state *old_state);
 
        int (*atomic_check)(struct drm_plane *plane,

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