From: Gustavo Padovan <gustavo.pado...@collabora.co.uk>

Rip out the check from exynos_update_plane() and create
exynos_check_plane() for the check phase enabling use to use
the atomic helpers to call our check and update phases when updating
planes.

Update all users of exynos_update_plane() accordingly to call
exynos_check_plane() before.

Signed-off-by: Gustavo Padovan <gustavo.padovan at collabora.co.uk>
---
 drivers/gpu/drm/exynos/exynos_drm_crtc.c  | 32 +++++++++++++-------------
 drivers/gpu/drm/exynos/exynos_drm_plane.c | 37 ++++++++++++++++++++++---------
 drivers/gpu/drm/exynos/exynos_drm_plane.h |  2 +-
 3 files changed, 43 insertions(+), 28 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c 
b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
index a85c451..74980c5 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
@@ -119,6 +119,7 @@ static int exynos_drm_crtc_mode_set_base(struct drm_crtc 
*crtc, int x, int y,
        struct drm_framebuffer *fb = crtc->primary->fb;
        unsigned int crtc_w;
        unsigned int crtc_h;
+       int ret;

        /* when framebuffer changing is requested, crtc's dpms should be on */
        if (exynos_crtc->dpms > DRM_MODE_DPMS_ON) {
@@ -126,11 +127,16 @@ static int exynos_drm_crtc_mode_set_base(struct drm_crtc 
*crtc, int x, int y,
                return -EPERM;
        }

+       ret = exynos_check_plane(crtc->primary, fb);
+       if (ret)
+               return ret;
+
        crtc_w = fb->width - x;
        crtc_h = fb->height - y;
+       exynos_update_plane(crtc->primary, crtc, fb, 0, 0,
+                           crtc_w, crtc_h, x, y, crtc_w, crtc_h);

-       return exynos_update_plane(crtc->primary, crtc, fb, 0, 0,
-                                  crtc_w, crtc_h, x, y, crtc_w, crtc_h);
+       return 0;
 }

 static void exynos_drm_crtc_disable(struct drm_crtc *crtc)
@@ -168,7 +174,6 @@ static int exynos_drm_crtc_page_flip(struct drm_crtc *crtc,
        struct drm_device *dev = crtc->dev;
        struct exynos_drm_private *dev_priv = dev->dev_private;
        struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
-       struct drm_framebuffer *old_fb = crtc->primary->fb;
        unsigned int crtc_w, crtc_h;
        int ret = -EINVAL;

@@ -181,6 +186,10 @@ static int exynos_drm_crtc_page_flip(struct drm_crtc *crtc,
        mutex_lock(&dev->struct_mutex);

        if (event) {
+               ret = exynos_check_plane(crtc->primary, fb);
+               if (ret)
+                       goto out;
+
                /*
                 * the pipe from user always is 0 so we can set pipe number
                 * of current owner to event.
@@ -203,20 +212,9 @@ static int exynos_drm_crtc_page_flip(struct drm_crtc *crtc,
                crtc->primary->fb = fb;
                crtc_w = fb->width - crtc->x;
                crtc_h = fb->height - crtc->y;
-               ret = exynos_update_plane(crtc->primary, crtc, fb, 0, 0,
-                                         crtc_w, crtc_h, crtc->x, crtc->y,
-                                         crtc_w, crtc_h);
-               if (ret) {
-                       crtc->primary->fb = old_fb;
-
-                       spin_lock_irq(&dev->event_lock);
-                       drm_vblank_put(dev, exynos_crtc->pipe);
-                       list_del(&event->base.link);
-                       atomic_set(&exynos_crtc->pending_flip, 0);
-                       spin_unlock_irq(&dev->event_lock);
-
-                       goto out;
-               }
+               exynos_update_plane(crtc->primary, crtc, fb, 0, 0,
+                                   crtc_w, crtc_h, crtc->x, crtc->y,
+                                   crtc_w, crtc_h);
        }
 out:
        mutex_unlock(&dev->struct_mutex);
diff --git a/drivers/gpu/drm/exynos/exynos_drm_plane.c 
b/drivers/gpu/drm/exynos/exynos_drm_plane.c
index 358cff6..0568589 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_plane.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_plane.c
@@ -171,21 +171,15 @@ void exynos_plane_dpms(struct drm_plane *plane, int mode)
        }
 }

-int
+void
 exynos_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
                     struct drm_framebuffer *fb, int crtc_x, int crtc_y,
                     unsigned int crtc_w, unsigned int crtc_h,
                     uint32_t src_x, uint32_t src_y,
                     uint32_t src_w, uint32_t src_h)
 {
-
        struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
        struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
-       int ret;
-
-       ret = exynos_check_plane(plane, fb);
-       if (ret < 0)
-               return ret;

        exynos_plane_mode_set(plane, crtc, fb, crtc_x, crtc_y,
                              crtc_w, crtc_h, src_x >> 16, src_y >> 16,
@@ -193,8 +187,6 @@ exynos_update_plane(struct drm_plane *plane, struct 
drm_crtc *crtc,

        if (exynos_crtc->ops->win_commit)
                exynos_crtc->ops->win_commit(exynos_crtc, exynos_plane->zpos);
-
-       return 0;
 }

 static int exynos_disable_plane(struct drm_plane *plane)
@@ -230,12 +222,35 @@ static int exynos_plane_set_property(struct drm_plane 
*plane,
 }

 static struct drm_plane_funcs exynos_plane_funcs = {
-       .update_plane   = exynos_update_plane,
+       .update_plane   = drm_plane_helper_update,
        .disable_plane  = exynos_disable_plane,
        .destroy        = exynos_plane_destroy,
        .set_property   = exynos_plane_set_property,
 };

+static int exynos_plane_atomic_check(struct drm_plane *plane,
+                                    struct drm_plane_state *state)
+{
+       return exynos_check_plane(plane, state->fb);
+}
+
+static void exynos_plane_atomic_update(struct drm_plane *plane,
+                                      struct drm_plane_state *old_state)
+{
+       struct drm_plane_state *state = plane->state;
+
+       exynos_update_plane(plane, state->crtc, state->fb,
+                           state->crtc_x, state->crtc_y,
+                           state->crtc_w, state->crtc_h,
+                           state->src_x >> 16, state->src_y >> 16,
+                           state->src_w >> 16, state->src_h >> 16);
+}
+
+static const struct drm_plane_helper_funcs plane_helper_funcs = {
+       .atomic_check = exynos_plane_atomic_check,
+       .atomic_update = exynos_plane_atomic_update,
+};
+
 static void exynos_plane_attach_zpos_property(struct drm_plane *plane)
 {
        struct drm_device *dev = plane->dev;
@@ -275,6 +290,8 @@ struct drm_plane *exynos_plane_init(struct drm_device *dev,
                return ERR_PTR(err);
        }

+       drm_plane_helper_add(&exynos_plane->base, &plane_helper_funcs);
+
        if (type == DRM_PLANE_TYPE_PRIMARY)
                exynos_plane->zpos = DEFAULT_ZPOS;
        else
diff --git a/drivers/gpu/drm/exynos/exynos_drm_plane.h 
b/drivers/gpu/drm/exynos/exynos_drm_plane.h
index 59d4075..2abe827 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_plane.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_plane.h
@@ -15,7 +15,7 @@ void exynos_plane_mode_set(struct drm_plane *plane, struct 
drm_crtc *crtc,
                           unsigned int crtc_w, unsigned int crtc_h,
                           uint32_t src_x, uint32_t src_y,
                           uint32_t src_w, uint32_t src_h);
-int exynos_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
+void exynos_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
                        struct drm_framebuffer *fb, int crtc_x, int crtc_y,
                        unsigned int crtc_w, unsigned int crtc_h,
                        uint32_t src_x, uint32_t src_y,
-- 
1.9.3

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