From: Dave Airlie <airlied@redhat.com>
Date: Fri, 17 Feb 2017 02:38:46 +0000 (+1000)
Subject: Revert "drm: Resurrect atomic rmfb code, v3"
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=9ca70356a9260403c1bda40d942935e55d00c11c;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

Revert "drm: Resurrect atomic rmfb code, v3"

This reverts commit 1592364de3912dad264262f4bcc61552984c9523.

This apparantly causes some regressions so pull it out for now.

Signed-off-by: Dave Airlie <airlied@redhat.com>
---

diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index 11f102e7ddfd..c97588a28216 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -2046,112 +2046,6 @@ static void complete_crtc_signaling(struct drm_device *dev,
 	kfree(fence_state);
 }
 
-int drm_atomic_remove_fb(struct drm_framebuffer *fb)
-{
-	struct drm_modeset_acquire_ctx ctx;
-	struct drm_device *dev = fb->dev;
-	struct drm_atomic_state *state;
-	struct drm_plane *plane;
-	struct drm_connector *conn;
-	struct drm_connector_state *conn_state;
-	int i, ret = 0;
-	unsigned plane_mask, disable_crtcs = false;
-
-	state = drm_atomic_state_alloc(dev);
-	if (!state)
-		return -ENOMEM;
-
-	drm_modeset_acquire_init(&ctx, 0);
-	state->acquire_ctx = &ctx;
-
-retry:
-	plane_mask = 0;
-	ret = drm_modeset_lock_all_ctx(dev, &ctx);
-	if (ret)
-		goto unlock;
-
-	drm_for_each_plane(plane, dev) {
-		struct drm_plane_state *plane_state;
-
-		if (plane->state->fb != fb)
-			continue;
-
-		plane_state = drm_atomic_get_plane_state(state, plane);
-		if (IS_ERR(plane_state)) {
-			ret = PTR_ERR(plane_state);
-			goto unlock;
-		}
-
-		/*
-		 * Some drivers do not support keeping crtc active with the
-		 * primary plane disabled. If we fail to commit with -EINVAL
-		 * then we will try to perform the same commit but with all
-		 * crtc's disabled for primary planes as well.
-		 */
-		if (disable_crtcs && plane_state->crtc->primary == plane) {
-			struct drm_crtc_state *crtc_state;
-
-			crtc_state = drm_atomic_get_existing_crtc_state(state, plane_state->crtc);
-
-			ret = drm_atomic_add_affected_connectors(state, plane_state->crtc);
-			if (ret)
-				goto unlock;
-
-			crtc_state->active = false;
-			ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL);
-			if (ret)
-				goto unlock;
-		}
-
-		drm_atomic_set_fb_for_plane(plane_state, NULL);
-		ret = drm_atomic_set_crtc_for_plane(plane_state, NULL);
-		if (ret)
-			goto unlock;
-
-		plane_mask |= BIT(drm_plane_index(plane));
-
-		plane->old_fb = plane->fb;
-	}
-
-	/* This list is only not empty when disable_crtcs is set. */
-	for_each_connector_in_state(state, conn, conn_state, i) {
-		ret = drm_atomic_set_crtc_for_connector(conn_state, NULL);
-
-		if (ret)
-			goto unlock;
-	}
-
-	if (plane_mask)
-		ret = drm_atomic_commit(state);
-
-unlock:
-	if (plane_mask)
-		drm_atomic_clean_old_fb(dev, plane_mask, ret);
-
-	if (ret == -EDEADLK) {
-		drm_modeset_backoff(&ctx);
-		goto retry;
-	}
-
-	drm_atomic_state_put(state);
-
-	if (ret == -EINVAL && !disable_crtcs) {
-		disable_crtcs = true;
-
-		state = drm_atomic_state_alloc(dev);
-		if (state) {
-			state->acquire_ctx = &ctx;
-			goto retry;
-		}
-		ret = -ENOMEM;
-	}
-
-	drm_modeset_drop_locks(&ctx);
-	drm_modeset_acquire_fini(&ctx);
-
-	return ret;
-}
-
 int drm_mode_atomic_ioctl(struct drm_device *dev,
 			  void *data, struct drm_file *file_priv)
 {
diff --git a/drivers/gpu/drm/drm_crtc_internal.h b/drivers/gpu/drm/drm_crtc_internal.h
index e0678f8a51cf..955c5690bf64 100644
--- a/drivers/gpu/drm/drm_crtc_internal.h
+++ b/drivers/gpu/drm/drm_crtc_internal.h
@@ -183,7 +183,6 @@ int drm_atomic_get_property(struct drm_mode_object *obj,
 			    struct drm_property *property, uint64_t *val);
 int drm_mode_atomic_ioctl(struct drm_device *dev,
 			  void *data, struct drm_file *file_priv);
-int drm_atomic_remove_fb(struct drm_framebuffer *fb);
 
 
 /* drm_plane.c */
diff --git a/drivers/gpu/drm/drm_framebuffer.c b/drivers/gpu/drm/drm_framebuffer.c
index c0e593a7f9b4..28a0108a1ab8 100644
--- a/drivers/gpu/drm/drm_framebuffer.c
+++ b/drivers/gpu/drm/drm_framebuffer.c
@@ -773,12 +773,6 @@ void drm_framebuffer_remove(struct drm_framebuffer *fb)
 	 * in this manner.
 	 */
 	if (drm_framebuffer_read_refcount(fb) > 1) {
-		if (drm_drv_uses_atomic_modeset(dev)) {
-			int ret = drm_atomic_remove_fb(fb);
-			WARN(ret, "atomic remove_fb failed with %i\n", ret);
-			goto out;
-		}
-
 		drm_modeset_lock_all(dev);
 		/* remove from any CRTC */
 		drm_for_each_crtc(crtc, dev) {
@@ -796,7 +790,6 @@ void drm_framebuffer_remove(struct drm_framebuffer *fb)
 		drm_modeset_unlock_all(dev);
 	}
 
-out:
 	drm_framebuffer_unreference(fb);
 }
 EXPORT_SYMBOL(drm_framebuffer_remove);