drm/exynos: atomic phase 3: convert page flips

PageFlips now use the atomic helper to work through the atomic modesetting
API. Async page flips are not supported yet.

v2: Add .atomic_begin() step to handle the vblank part we removed from
exynos page_flip code.

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: Joonyoung Shim <jy0922.shim@samsung.com>
Tested-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

2 files changed, 25 insertions, 63 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
index dd1ee7f383cd..a13779915cde 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
@@ -101,75 +101,30 @@ static void exynos_drm_crtc_disable(struct drm_crtc *crtc)
         }
 }
 
+static void exynos_crtc_atomic_begin(struct drm_crtc *crtc)
+{
+        struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
+
+        if (crtc->state->event) {
+                WARN_ON(drm_crtc_vblank_get(crtc) != 0);
+                exynos_crtc->event = crtc->state->event;
+        }
+}
+
+static void exynos_crtc_atomic_flush(struct drm_crtc *crtc)
+{
+}
+
 static struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
         .dpms           = exynos_drm_crtc_dpms,
         .commit         = exynos_drm_crtc_commit,
         .mode_fixup     = exynos_drm_crtc_mode_fixup,
         .mode_set_nofb  = exynos_drm_crtc_mode_set_nofb,
         .disable        = exynos_drm_crtc_disable,
+        .atomic_begin   = exynos_crtc_atomic_begin,
+        .atomic_flush   = exynos_crtc_atomic_flush,
 };
 
-static int exynos_drm_crtc_page_flip(struct drm_crtc *crtc,
-                                     struct drm_framebuffer *fb,
-                                     struct drm_pending_vblank_event *event,
-                                     uint32_t page_flip_flags)
-{
-        struct drm_device *dev = crtc->dev;
-        struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
-        unsigned int crtc_w, crtc_h;
-        int ret;
-
-        /* when the page flip is requested, crtc's dpms should be on */
-        if (exynos_crtc->dpms > DRM_MODE_DPMS_ON) {
-                DRM_ERROR("failed page flip request.\n");
-                return -EINVAL;
-        }
-
-        if (!event)
-                return -EINVAL;
-
-        spin_lock_irq(&dev->event_lock);
-        if (exynos_crtc->event) {
-                ret = -EBUSY;
-                goto out;
-        }
-
-        ret = exynos_check_plane(crtc->primary, fb);
-        if (ret)
-                goto out;
-
-        ret = drm_vblank_get(dev, exynos_crtc->pipe);
-        if (ret) {
-                DRM_DEBUG("failed to acquire vblank counter\n");
-                goto out;
-        }
-
-        exynos_crtc->event = event;
-        spin_unlock_irq(&dev->event_lock);
-
-        /*
-         * the pipe from user always is 0 so we can set pipe number
-         * of current owner to event.
-         */
-        event->pipe = exynos_crtc->pipe;
-
-        crtc->primary->fb = fb;
-        crtc_w = fb->width - crtc->x;
-        crtc_h = fb->height - crtc->y;
-        exynos_update_plane(crtc->primary, crtc, fb, 0, 0,
-                            crtc_w, crtc_h, crtc->x << 16, crtc->y << 16,
-                            crtc_w << 16, crtc_h << 16);
-
-        if (crtc->primary->state)
-                drm_atomic_set_fb_for_plane(crtc->primary->state, fb);
-
-        return 0;
-
-out:
-        spin_unlock_irq(&dev->event_lock);
-        return ret;
-}
-
 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc)
 {
         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
@@ -183,7 +138,7 @@ static void exynos_drm_crtc_destroy(struct drm_crtc *crtc)
 
 static struct drm_crtc_funcs exynos_crtc_funcs = {
         .set_config     = drm_atomic_helper_set_config,
-        .page_flip      = exynos_drm_crtc_page_flip,
+        .page_flip      = drm_atomic_helper_page_flip,
         .destroy        = exynos_drm_crtc_destroy,
         .reset = drm_atomic_helper_crtc_reset,
         .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fb.c b/drivers/gpu/drm/exynos/exynos_drm_fb.c
index 19c06429fc45..05d229c1629a 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fb.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fb.c
@@ -266,11 +266,18 @@ static void exynos_drm_output_poll_changed(struct drm_device *dev)
                 exynos_drm_fbdev_init(dev);
 }
 
+static int exynos_atomic_commit(struct drm_device *dev,
+                                struct drm_atomic_state *state,
+                                bool async)
+{
+        return drm_atomic_helper_commit(dev, state, false);
+}
+
 static const struct drm_mode_config_funcs exynos_drm_mode_config_funcs = {
         .fb_create = exynos_user_fb_create,
         .output_poll_changed = exynos_drm_output_poll_changed,
         .atomic_check = drm_atomic_helper_check,
-        .atomic_commit = drm_atomic_helper_commit,
+        .atomic_commit = exynos_atomic_commit,
 };
 
 void exynos_drm_mode_config_init(struct drm_device *dev)