drm: omapdrm: Use DRM core's atomic commit helper

The DRM core atomic helper now supports asynchronous commits natively.
The custom omapdrm implementation isn't needed anymore, remove it.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

1 files changed, 14 insertions, 98 deletions

diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
index 663e930a7b0f..b4ef3025e3e3 100644
--- a/drivers/gpu/drm/omapdrm/omap_drv.c
+++ b/drivers/gpu/drm/omapdrm/omap_drv.c
@@ -17,8 +17,6 @@
  * this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include <linux/wait.h>
-
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_crtc_helper.h>
@@ -54,13 +52,6 @@ static void omap_fb_output_poll_changed(struct drm_device *dev)
                 drm_fb_helper_hotplug_event(priv->fbdev);
 }
 
-struct omap_atomic_state_commit {
-        struct work_struct work;
-        struct drm_device *dev;
-        struct drm_atomic_state *state;
-        u32 crtcs;
-};
-
 static void omap_atomic_wait_for_completion(struct drm_device *dev,
                                             struct drm_atomic_state *old_state)
 {
@@ -81,15 +72,14 @@ static void omap_atomic_wait_for_completion(struct drm_device *dev,
         }
 }
 
-static void omap_atomic_complete(struct omap_atomic_state_commit *commit)
+static void omap_atomic_commit_tail(struct drm_atomic_state *old_state)
 {
-        struct drm_device *dev = commit->dev;
+        struct drm_device *dev = old_state->dev;
         struct omap_drm_private *priv = dev->dev_private;
-        struct drm_atomic_state *old_state = commit->state;
 
-        /* Apply the atomic update. */
         priv->dispc_ops->runtime_get();
 
+        /* Apply the atomic update. */
         drm_atomic_helper_commit_modeset_disables(dev, old_state);
 
         /* With the current dss dispc implementation we have to enable
@@ -108,101 +98,28 @@ static void omap_atomic_complete(struct omap_atomic_state_commit *commit)
 
         drm_atomic_helper_commit_planes(dev, old_state, 0);
 
+        drm_atomic_helper_commit_hw_done(old_state);
+
+        /*
+         * Wait for completion of the page flips to ensure that old buffers
+         * can't be touched by the hardware anymore before cleaning up planes.
+         */
         omap_atomic_wait_for_completion(dev, old_state);
 
         drm_atomic_helper_cleanup_planes(dev, old_state);
 
         priv->dispc_ops->runtime_put();
-
-        drm_atomic_state_put(old_state);
-
-        /* Complete the commit, wake up any waiter. */
-        spin_lock(&priv->commit.lock);
-        priv->commit.pending &= ~commit->crtcs;
-        spin_unlock(&priv->commit.lock);
-
-        wake_up_all(&priv->commit.wait);
-
-        kfree(commit);
-}
-
-static void omap_atomic_work(struct work_struct *work)
-{
-        struct omap_atomic_state_commit *commit =
-                container_of(work, struct omap_atomic_state_commit, work);
-
-        omap_atomic_complete(commit);
 }
 
-static bool omap_atomic_is_pending(struct omap_drm_private *priv,
-                                   struct omap_atomic_state_commit *commit)
-{
-        bool pending;
-
-        spin_lock(&priv->commit.lock);
-        pending = priv->commit.pending & commit->crtcs;
-        spin_unlock(&priv->commit.lock);
-
-        return pending;
-}
-
-static int omap_atomic_commit(struct drm_device *dev,
-                              struct drm_atomic_state *state, bool nonblock)
-{
-        struct omap_drm_private *priv = dev->dev_private;
-        struct omap_atomic_state_commit *commit;
-        struct drm_crtc *crtc;
-        struct drm_crtc_state *crtc_state;
-        int i, ret;
-
-        ret = drm_atomic_helper_prepare_planes(dev, state);
-        if (ret)
-                return ret;
-
-        /* Allocate the commit object. */
-        commit = kzalloc(sizeof(*commit), GFP_KERNEL);
-        if (commit == NULL) {
-                ret = -ENOMEM;
-                goto error;
-        }
-
-        INIT_WORK(&commit->work, omap_atomic_work);
-        commit->dev = dev;
-        commit->state = state;
-
-        /* Wait until all affected CRTCs have completed previous commits and
-         * mark them as pending.
-         */
-        for_each_crtc_in_state(state, crtc, crtc_state, i)
-                commit->crtcs |= drm_crtc_mask(crtc);
-
-        wait_event(priv->commit.wait, !omap_atomic_is_pending(priv, commit));
-
-        spin_lock(&priv->commit.lock);
-        priv->commit.pending |= commit->crtcs;
-        spin_unlock(&priv->commit.lock);
-
-        /* Swap the state, this is the point of no return. */
-        drm_atomic_helper_swap_state(state, true);
-
-        drm_atomic_state_get(state);
-        if (nonblock)
-                schedule_work(&commit->work);
-        else
-                omap_atomic_complete(commit);
-
-        return 0;
-
-error:
-        drm_atomic_helper_cleanup_planes(dev, state);
-        return ret;
-}
+static const struct drm_mode_config_helper_funcs omap_mode_config_helper_funcs = {
+        .atomic_commit_tail = omap_atomic_commit_tail,
+};
 
 static const struct drm_mode_config_funcs omap_mode_config_funcs = {
         .fb_create = omap_framebuffer_create,
         .output_poll_changed = omap_fb_output_poll_changed,
         .atomic_check = drm_atomic_helper_check,
-        .atomic_commit = omap_atomic_commit,
+        .atomic_commit = drm_atomic_helper_commit,
 };
 
 static int get_connector_type(struct omap_dss_device *dssdev)
@@ -385,6 +302,7 @@ static int omap_modeset_init(struct drm_device *dev)
         dev->mode_config.max_height = 2048;
 
         dev->mode_config.funcs = &omap_mode_config_funcs;
+        dev->mode_config.helper_private = &omap_mode_config_helper_funcs;
 
         drm_mode_config_reset(dev);
 
@@ -674,8 +592,6 @@ static int pdev_probe(struct platform_device *pdev)
         priv->omaprev = pdata->omaprev;
         priv->wq = alloc_ordered_workqueue("omapdrm", 0);
 
-        init_waitqueue_head(&priv->commit.wait);
-        spin_lock_init(&priv->commit.lock);
         spin_lock_init(&priv->list_lock);
         INIT_LIST_HEAD(&priv->obj_list);