disp: msm: sde: remove all preclose logic

The DRM framework only calls the driver's preclose callback
function if the LEGACY driver feature is enabled. Therefore
strip out this logic as it never gets executed since LEGACY
is not supported for msm_drm driver.

Change-Id: I95474cd5424423ef194faae12f1241698f3e467e
Signed-off-by: Steve Cohen <cohens@codeaurora.org>

msm/msm_drv.c

@@ -907,15 +907,6 @@ static void context_close(struct msm_file_private *ctx)
 	kfree(ctx);
 }
 
-static void msm_preclose(struct drm_device *dev, struct drm_file *file)
-{
-	struct msm_drm_private *priv = dev->dev_private;
-	struct msm_kms *kms = priv->kms;
-
-	if (kms && kms->funcs && kms->funcs->preclose)
-		kms->funcs->preclose(kms, file);
-}
-
 static void msm_postclose(struct drm_device *dev, struct drm_file *file)
 {
 	struct msm_drm_private *priv = dev->dev_private;
@@ -1564,7 +1555,6 @@ static struct drm_driver msm_driver = {
 				DRIVER_ATOMIC |
 				DRIVER_MODESET,
 	.open               = msm_open,
-	.preclose           = msm_preclose,
 	.postclose          = msm_postclose,
 	.lastclose          = msm_lastclose,
 	.irq_handler        = msm_irq,

msm/msm_kms.h

@@ -93,7 +93,6 @@ struct msm_kms_funcs {
 			struct drm_encoder *slave_encoder,
 			bool is_cmd_mode);
 	void (*postopen)(struct msm_kms *kms, struct drm_file *file);
-	void (*preclose)(struct msm_kms *kms, struct drm_file *file);
 	void (*postclose)(struct msm_kms *kms, struct drm_file *file);
 	void (*lastclose)(struct msm_kms *kms);
 	int (*register_events)(struct msm_kms *kms,

msm/sde/sde_kms.c

@@ -1863,141 +1863,6 @@ static void sde_kms_destroy(struct msm_kms *kms)
 	kfree(sde_kms);
 }
 
-static void _sde_kms_plane_force_remove(struct drm_plane *plane,
-			struct drm_atomic_state *state)
-{
-	struct drm_plane_state *plane_state;
-	int ret = 0;
-
-	plane_state = drm_atomic_get_plane_state(state, plane);
-	if (IS_ERR(plane_state)) {
-		ret = PTR_ERR(plane_state);
-		SDE_ERROR("error %d getting plane %d state\n",
-				ret, plane->base.id);
-		return;
-	}
-
-	plane->old_fb = plane->fb;
-
-	SDE_DEBUG("disabling plane %d\n", plane->base.id);
-
-	ret = __drm_atomic_helper_disable_plane(plane, plane_state);
-	if (ret != 0)
-		SDE_ERROR("error %d disabling plane %d\n", ret,
-				plane->base.id);
-}
-
-static int _sde_kms_remove_fbs(struct sde_kms *sde_kms, struct drm_file *file,
-		struct drm_atomic_state *state)
-{
-	struct drm_device *dev = sde_kms->dev;
-	struct drm_framebuffer *fb, *tfb;
-	struct list_head fbs;
-	struct drm_plane *plane;
-	int ret = 0;
-	u32 plane_mask = 0;
-
-	INIT_LIST_HEAD(&fbs);
-
-	list_for_each_entry_safe(fb, tfb, &file->fbs, filp_head) {
-		if (drm_framebuffer_read_refcount(fb) > 1) {
-			list_move_tail(&fb->filp_head, &fbs);
-
-			drm_for_each_plane(plane, dev) {
-				if (plane->fb == fb) {
-					plane_mask |=
-						1 << drm_plane_index(plane);
-					 _sde_kms_plane_force_remove(
-								plane, state);
-				}
-			}
-		} else {
-			list_del_init(&fb->filp_head);
-			drm_framebuffer_put(fb);
-		}
-	}
-
-	if (list_empty(&fbs)) {
-		SDE_DEBUG("skip commit as no fb(s)\n");
-		drm_atomic_state_put(state);
-		return 0;
-	}
-
-	SDE_DEBUG("committing after removing all the pipes\n");
-	ret = drm_atomic_commit(state);
-
-	if (ret) {
-		/*
-		 * move the fbs back to original list, so it would be
-		 * handled during drm_release
-		 */
-		list_for_each_entry_safe(fb, tfb, &fbs, filp_head)
-			list_move_tail(&fb->filp_head, &file->fbs);
-
-		SDE_ERROR("atomic commit failed in preclose, ret:%d\n", ret);
-		goto end;
-	}
-
-	while (!list_empty(&fbs)) {
-		fb = list_first_entry(&fbs, typeof(*fb), filp_head);
-
-		list_del_init(&fb->filp_head);
-		drm_framebuffer_put(fb);
-	}
-
-end:
-	return ret;
-}
-
-static void sde_kms_preclose(struct msm_kms *kms, struct drm_file *file)
-{
-	struct sde_kms *sde_kms = to_sde_kms(kms);
-	struct drm_device *dev = sde_kms->dev;
-	struct msm_drm_private *priv = dev->dev_private;
-	unsigned int i;
-	struct drm_atomic_state *state = NULL;
-	struct drm_modeset_acquire_ctx ctx;
-	int ret = 0;
-
-	/* cancel pending flip event */
-	for (i = 0; i < priv->num_crtcs; i++)
-		sde_crtc_complete_flip(priv->crtcs[i], file);
-
-	drm_modeset_acquire_init(&ctx, 0);
-retry:
-	ret = drm_modeset_lock_all_ctx(dev, &ctx);
-	if (ret == -EDEADLK) {
-		drm_modeset_backoff(&ctx);
-		goto retry;
-	} else if (WARN_ON(ret)) {
-		goto end;
-	}
-
-	state = drm_atomic_state_alloc(dev);
-	if (!state) {
-		ret = -ENOMEM;
-		goto end;
-	}
-
-	state->acquire_ctx = &ctx;
-
-	for (i = 0; i < TEARDOWN_DEADLOCK_RETRY_MAX; i++) {
-		ret = _sde_kms_remove_fbs(sde_kms, file, state);
-		if (ret != -EDEADLK)
-			break;
-		drm_atomic_state_clear(state);
-		drm_modeset_backoff(&ctx);
-	}
-
-end:
-	if (state)
-		drm_atomic_state_put(state);
-
-	SDE_DEBUG("sde preclose done, ret:%d\n", ret);
-	drm_modeset_drop_locks(&ctx);
-	drm_modeset_acquire_fini(&ctx);
-}
-
 static int _sde_kms_helper_reset_custom_properties(struct sde_kms *sde_kms,
 		struct drm_atomic_state *state)
 {
@@ -2895,7 +2760,6 @@ static const struct msm_kms_funcs kms_funcs = {
 	.irq_postinstall = sde_irq_postinstall,
 	.irq_uninstall   = sde_irq_uninstall,
 	.irq             = sde_irq,
-	.preclose        = sde_kms_preclose,
 	.lastclose       = sde_kms_lastclose,
 	.prepare_fence   = sde_kms_prepare_fence,
 	.prepare_commit  = sde_kms_prepare_commit,