drm: qxl: Atomic phase 1: convert cursor to universal plane

In preparation for atomic conversion, let's use the transitional atomic
helpers drm_plane_helper_update/disable.

Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170227204328.18761-6-krisman@collabora.co.uk
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

2 files changed, 202 insertions, 244 deletions

diff --git a/drivers/gpu/drm/qxl/qxl_display.c b/drivers/gpu/drm/qxl/qxl_display.c
index 04f021437c25..fef464730c9b 100644
--- a/drivers/gpu/drm/qxl/qxl_display.c
+++ b/drivers/gpu/drm/qxl/qxl_display.c
@@ -30,6 +30,7 @@
 #include "qxl_object.h"
 #include "drm_crtc_helper.h"
 #include <drm/drm_plane_helper.h>
+#include <drm/drm_atomic_helper.h>
 
 static bool qxl_head_enabled(struct qxl_head *head)
 {
@@ -256,7 +257,6 @@ static void qxl_crtc_destroy(struct drm_crtc *crtc)
 	struct qxl_crtc *qxl_crtc = to_qxl_crtc(crtc);
 
 	drm_crtc_cleanup(crtc);
-	qxl_bo_unref(&qxl_crtc->cursor_bo);
 	kfree(qxl_crtc);
 }
 
@@ -304,234 +304,7 @@ static int qxl_crtc_page_flip(struct drm_crtc *crtc,
 	return 0;
 }
 
-static int
-qxl_hide_cursor(struct qxl_device *qdev)
-{
-	struct qxl_release *release;
-	struct qxl_cursor_cmd *cmd;
-	int ret;
-
-	ret = qxl_alloc_release_reserved(qdev, sizeof(*cmd), QXL_RELEASE_CURSOR_CMD,
-					 &release, NULL);
-	if (ret)
-		return ret;
-
-	ret = qxl_release_reserve_list(release, true);
-	if (ret) {
-		qxl_release_free(qdev, release);
-		return ret;
-	}
-
-	cmd = (struct qxl_cursor_cmd *)qxl_release_map(qdev, release);
-	cmd->type = QXL_CURSOR_HIDE;
-	qxl_release_unmap(qdev, release, &cmd->release_info);
-
-	qxl_push_cursor_ring_release(qdev, release, QXL_CMD_CURSOR, false);
-	qxl_release_fence_buffer_objects(release);
-	return 0;
-}
-
-static int qxl_crtc_apply_cursor(struct drm_crtc *crtc)
-{
-	struct qxl_crtc *qcrtc = to_qxl_crtc(crtc);
-	struct drm_device *dev = crtc->dev;
-	struct qxl_device *qdev = dev->dev_private;
-	struct qxl_cursor_cmd *cmd;
-	struct qxl_release *release;
-	int ret = 0;
-
-	if (!qcrtc->cursor_bo)
-		return 0;
-
-	ret = qxl_alloc_release_reserved(qdev, sizeof(*cmd),
-					 QXL_RELEASE_CURSOR_CMD,
-					 &release, NULL);
-	if (ret)
-		return ret;
-
-	ret = qxl_release_list_add(release, qcrtc->cursor_bo);
-	if (ret)
-		goto out_free_release;
-
-	ret = qxl_release_reserve_list(release, false);
-	if (ret)
-		goto out_free_release;
-
-	cmd = (struct qxl_cursor_cmd *)qxl_release_map(qdev, release);
-	cmd->type = QXL_CURSOR_SET;
-	cmd->u.set.position.x = qcrtc->cur_x + qcrtc->hot_spot_x;
-	cmd->u.set.position.y = qcrtc->cur_y + qcrtc->hot_spot_y;
-
-	cmd->u.set.shape = qxl_bo_physical_address(qdev, qcrtc->cursor_bo, 0);
-
-	cmd->u.set.visible = 1;
-	qxl_release_unmap(qdev, release, &cmd->release_info);
-
-	qxl_push_cursor_ring_release(qdev, release, QXL_CMD_CURSOR, false);
-	qxl_release_fence_buffer_objects(release);
-
-	return ret;
-
-out_free_release:
-	qxl_release_free(qdev, release);
-	return ret;
-}
-
-static int qxl_crtc_cursor_set2(struct drm_crtc *crtc,
-				struct drm_file *file_priv,
-				uint32_t handle,
-				uint32_t width,
-				uint32_t height, int32_t hot_x, int32_t hot_y)
-{
-	struct drm_device *dev = crtc->dev;
-	struct qxl_device *qdev = dev->dev_private;
-	struct qxl_crtc *qcrtc = to_qxl_crtc(crtc);
-	struct drm_gem_object *obj;
-	struct qxl_cursor *cursor;
-	struct qxl_cursor_cmd *cmd;
-	struct qxl_bo *cursor_bo, *user_bo;
-	struct qxl_release *release;
-	void *user_ptr;
-
-	int size = 64*64*4;
-	int ret = 0;
-	if (!handle)
-		return qxl_hide_cursor(qdev);
-
-	obj = drm_gem_object_lookup(file_priv, handle);
-	if (!obj) {
-		DRM_ERROR("cannot find cursor object\n");
-		return -ENOENT;
-	}
-
-	user_bo = gem_to_qxl_bo(obj);
-
-	ret = qxl_bo_pin(user_bo, QXL_GEM_DOMAIN_CPU, NULL);
-	if (ret)
-		goto out_unref;
-
-	ret = qxl_bo_kmap(user_bo, &user_ptr);
-	if (ret)
-		goto out_unpin;
-
-	ret = qxl_alloc_release_reserved(qdev, sizeof(*cmd),
-					 QXL_RELEASE_CURSOR_CMD,
-					 &release, NULL);
-	if (ret)
-		goto out_kunmap;
-
-	ret = qxl_alloc_bo_reserved(qdev, release, sizeof(struct qxl_cursor) + size,
-			   &cursor_bo);
-	if (ret)
-		goto out_free_release;
-
-	ret = qxl_release_reserve_list(release, false);
-	if (ret)
-		goto out_free_bo;
-
-	ret = qxl_bo_kmap(cursor_bo, (void **)&cursor);
-	if (ret)
-		goto out_backoff;
-
-	cursor->header.unique = 0;
-	cursor->header.type = SPICE_CURSOR_TYPE_ALPHA;
-	cursor->header.width = 64;
-	cursor->header.height = 64;
-	cursor->header.hot_spot_x = hot_x;
-	cursor->header.hot_spot_y = hot_y;
-	cursor->data_size = size;
-	cursor->chunk.next_chunk = 0;
-	cursor->chunk.prev_chunk = 0;
-	cursor->chunk.data_size = size;
-
-	memcpy(cursor->chunk.data, user_ptr, size);
-
-	qxl_bo_kunmap(cursor_bo);
-
-	qxl_bo_kunmap(user_bo);
-
-	qcrtc->cur_x += qcrtc->hot_spot_x - hot_x;
-	qcrtc->cur_y += qcrtc->hot_spot_y - hot_y;
-	qcrtc->hot_spot_x = hot_x;
-	qcrtc->hot_spot_y = hot_y;
-
-	cmd = (struct qxl_cursor_cmd *)qxl_release_map(qdev, release);
-	cmd->type = QXL_CURSOR_SET;
-	cmd->u.set.position.x = qcrtc->cur_x + qcrtc->hot_spot_x;
-	cmd->u.set.position.y = qcrtc->cur_y + qcrtc->hot_spot_y;
-
-	cmd->u.set.shape = qxl_bo_physical_address(qdev, cursor_bo, 0);
-
-	cmd->u.set.visible = 1;
-	qxl_release_unmap(qdev, release, &cmd->release_info);
-
-	qxl_push_cursor_ring_release(qdev, release, QXL_CMD_CURSOR, false);
-	qxl_release_fence_buffer_objects(release);
-
-	/* finish with the userspace bo */
-	qxl_bo_unpin(user_bo);
-
-	drm_gem_object_unreference_unlocked(obj);
-
-	qxl_bo_unref (&qcrtc->cursor_bo);
-	qcrtc->cursor_bo = cursor_bo;
-
-	return ret;
-
-out_backoff:
-	qxl_release_backoff_reserve_list(release);
-out_free_bo:
-	qxl_bo_unref(&cursor_bo);
-out_free_release:
-	qxl_release_free(qdev, release);
-out_kunmap:
-	qxl_bo_kunmap(user_bo);
-out_unpin:
-	qxl_bo_unpin(user_bo);
-out_unref:
-	drm_gem_object_unreference_unlocked(obj);
-	return ret;
-}
-
-static int qxl_crtc_cursor_move(struct drm_crtc *crtc,
-				int x, int y)
-{
-	struct drm_device *dev = crtc->dev;
-	struct qxl_device *qdev = dev->dev_private;
-	struct qxl_crtc *qcrtc = to_qxl_crtc(crtc);
-	struct qxl_release *release;
-	struct qxl_cursor_cmd *cmd;
-	int ret;
-
-	ret = qxl_alloc_release_reserved(qdev, sizeof(*cmd), QXL_RELEASE_CURSOR_CMD,
-				   &release, NULL);
-	if (ret)
-		return ret;
-
-	ret = qxl_release_reserve_list(release, true);
-	if (ret) {
-		qxl_release_free(qdev, release);
-		return ret;
-	}
-
-	qcrtc->cur_x = x;
-	qcrtc->cur_y = y;
-
-	cmd = (struct qxl_cursor_cmd *)qxl_release_map(qdev, release);
-	cmd->type = QXL_CURSOR_MOVE;
-	cmd->u.position.x = qcrtc->cur_x + qcrtc->hot_spot_x;
-	cmd->u.position.y = qcrtc->cur_y + qcrtc->hot_spot_y;
-	qxl_release_unmap(qdev, release, &cmd->release_info);
-
-	qxl_push_cursor_ring_release(qdev, release, QXL_CMD_CURSOR, false);
-	qxl_release_fence_buffer_objects(release);
-
-	return 0;
-}
-
 static const struct drm_crtc_funcs qxl_crtc_funcs = {
-	.cursor_set2 = qxl_crtc_cursor_set2,
-	.cursor_move = qxl_crtc_cursor_move,
 	.set_config = drm_crtc_helper_set_config,
 	.destroy = qxl_crtc_destroy,
 	.page_flip = qxl_crtc_page_flip,
@@ -723,12 +496,6 @@ static int qxl_crtc_mode_set(struct drm_crtc *crtc,
 			   bo->surf.stride, bo->surf.format);
 		qxl_io_create_primary(qdev, 0, bo);
 		bo->is_primary = true;
-
-		ret = qxl_crtc_apply_cursor(crtc);
-		if (ret) {
-			DRM_ERROR("could not set cursor after modeset");
-			ret = 0;
-		}
 	}
 
 	if (bo->is_primary) {
@@ -788,6 +555,188 @@ static const struct drm_crtc_helper_funcs qxl_crtc_helper_funcs = {
 	.commit = qxl_crtc_commit,
 };
 
+int qxl_plane_atomic_check(struct drm_plane *plane,
+			   struct drm_plane_state *state)
+{
+	return 0;
+}
+
+static void qxl_cursor_atomic_update(struct drm_plane *plane,
+				     struct drm_plane_state *old_state)
+{
+	struct drm_device *dev = plane->dev;
+	struct qxl_device *qdev = dev->dev_private;
+	struct drm_framebuffer *fb = plane->state->fb;
+	struct qxl_release *release;
+	struct qxl_cursor_cmd *cmd;
+	struct qxl_cursor *cursor;
+	struct drm_gem_object *obj;
+	struct qxl_bo *cursor_bo, *user_bo = NULL;
+	int ret;
+	void *user_ptr;
+	int size = 64*64*4;
+
+	ret = qxl_alloc_release_reserved(qdev, sizeof(*cmd),
+					 QXL_RELEASE_CURSOR_CMD,
+					 &release, NULL);
+
+	cmd = (struct qxl_cursor_cmd *) qxl_release_map(qdev, release);
+
+	if (fb != old_state->fb) {
+		obj = to_qxl_framebuffer(fb)->obj;
+		user_bo = gem_to_qxl_bo(obj);
+
+		/* pinning is done in the prepare/cleanup framevbuffer */
+		ret = qxl_bo_kmap(user_bo, &user_ptr);
+		if (ret)
+			goto out_free_release;
+
+		ret = qxl_alloc_bo_reserved(qdev, release,
+					    sizeof(struct qxl_cursor) + size,
+					    &cursor_bo);
+		if (ret)
+			goto out_kunmap;
+
+		ret = qxl_release_reserve_list(release, true);
+		if (ret)
+			goto out_free_bo;
+
+		ret = qxl_bo_kmap(cursor_bo, (void **)&cursor);
+		if (ret)
+			goto out_backoff;
+
+		cursor->header.unique = 0;
+		cursor->header.type = SPICE_CURSOR_TYPE_ALPHA;
+		cursor->header.width = 64;
+		cursor->header.height = 64;
+		cursor->header.hot_spot_x = fb->hot_x;
+		cursor->header.hot_spot_y = fb->hot_y;
+		cursor->data_size = size;
+		cursor->chunk.next_chunk = 0;
+		cursor->chunk.prev_chunk = 0;
+		cursor->chunk.data_size = size;
+		memcpy(cursor->chunk.data, user_ptr, size);
+		qxl_bo_kunmap(cursor_bo);
+		qxl_bo_kunmap(user_bo);
+
+		cmd->u.set.visible = 1;
+		cmd->u.set.shape = qxl_bo_physical_address(qdev,
+							   cursor_bo, 0);
+		cmd->type = QXL_CURSOR_SET;
+	} else {
+
+		ret = qxl_release_reserve_list(release, true);
+		if (ret)
+			goto out_free_release;
+
+		cmd->type = QXL_CURSOR_MOVE;
+	}
+
+	cmd->u.position.x = plane->state->crtc_x + fb->hot_x;
+	cmd->u.position.y = plane->state->crtc_y + fb->hot_y;
+
+	qxl_release_unmap(qdev, release, &cmd->release_info);
+	qxl_push_cursor_ring_release(qdev, release, QXL_CMD_CURSOR, false);
+	qxl_release_fence_buffer_objects(release);
+
+	return;
+
+out_backoff:
+	qxl_release_backoff_reserve_list(release);
+out_free_bo:
+	qxl_bo_unref(&cursor_bo);
+out_kunmap:
+	qxl_bo_kunmap(user_bo);
+out_free_release:
+	qxl_release_free(qdev, release);
+	return;
+
+}
+
+void qxl_cursor_atomic_disable(struct drm_plane *plane,
+			       struct drm_plane_state *old_state)
+{
+	struct qxl_device *qdev = plane->dev->dev_private;
+	struct qxl_release *release;
+	struct qxl_cursor_cmd *cmd;
+	int ret;
+
+	ret = qxl_alloc_release_reserved(qdev, sizeof(*cmd),
+					 QXL_RELEASE_CURSOR_CMD,
+					 &release, NULL);
+	if (ret)
+		return;
+
+	ret = qxl_release_reserve_list(release, true);
+	if (ret) {
+		qxl_release_free(qdev, release);
+		return;
+	}
+
+	cmd = (struct qxl_cursor_cmd *)qxl_release_map(qdev, release);
+	cmd->type = QXL_CURSOR_HIDE;
+	qxl_release_unmap(qdev, release, &cmd->release_info);
+
+	qxl_push_cursor_ring_release(qdev, release, QXL_CMD_CURSOR, false);
+	qxl_release_fence_buffer_objects(release);
+}
+
+int qxl_plane_prepare_fb(struct drm_plane *plane,
+			 struct drm_plane_state *new_state)
+{
+	struct drm_gem_object *obj;
+	struct qxl_bo *user_bo;
+	int ret;
+
+	if (!new_state->fb)
+		return 0;
+
+	obj = to_qxl_framebuffer(new_state->fb)->obj;
+	user_bo = gem_to_qxl_bo(obj);
+
+	ret = qxl_bo_pin(user_bo, QXL_GEM_DOMAIN_CPU, NULL);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static void qxl_plane_cleanup_fb(struct drm_plane *plane,
+				 struct drm_plane_state *old_state)
+{
+	struct drm_gem_object *obj;
+	struct qxl_bo *user_bo;
+
+	if (!plane->state->fb) {
+		/* we never executed prepare_fb, so there's nothing to
+		 * unpin.
+		 */
+		return;
+	}
+
+	obj = to_qxl_framebuffer(plane->state->fb)->obj;
+	user_bo = gem_to_qxl_bo(obj);
+	qxl_bo_unpin(user_bo);
+}
+
+static const uint32_t qxl_cursor_plane_formats[] = {
+	DRM_FORMAT_ARGB8888,
+};
+
+static const struct drm_plane_helper_funcs qxl_cursor_helper_funcs = {
+	.atomic_check = qxl_plane_atomic_check,
+	.atomic_update = qxl_cursor_atomic_update,
+	.atomic_disable = qxl_cursor_atomic_disable,
+	.prepare_fb = qxl_plane_prepare_fb,
+	.cleanup_fb = qxl_plane_cleanup_fb,
+};
+
+static const struct drm_plane_funcs qxl_cursor_plane_funcs = {
+	.update_plane	= drm_plane_helper_update,
+	.disable_plane	= drm_plane_helper_disable,
+	.destroy	= drm_primary_helper_destroy,
+};
+
 static const uint32_t qxl_primary_plane_formats[] = {
 	DRM_FORMAT_XRGB8888,
 	DRM_FORMAT_ARGB8888,
@@ -814,6 +763,11 @@ static struct drm_plane *qxl_create_plane(struct qxl_device *qdev,
 		funcs = &qxl_primary_plane_funcs;
 		formats = qxl_primary_plane_formats;
 		num_formats = ARRAY_SIZE(qxl_primary_plane_formats);
+	} else if (type == DRM_PLANE_TYPE_CURSOR) {
+		funcs = &qxl_cursor_plane_funcs;
+		formats = qxl_cursor_plane_formats;
+		helper_funcs = &qxl_cursor_helper_funcs;
+		num_formats = ARRAY_SIZE(qxl_cursor_plane_formats);
 	} else {
 		return ERR_PTR(-EINVAL);
 	}
@@ -840,7 +794,7 @@ free_plane:
 static int qdev_crtc_init(struct drm_device *dev, int crtc_id)
 {
 	struct qxl_crtc *qxl_crtc;
-	struct drm_plane *primary;
+	struct drm_plane *primary, *cursor;
 	struct qxl_device *qdev = dev->dev_private;
 	int r;
 
@@ -854,15 +808,24 @@ static int qdev_crtc_init(struct drm_device *dev, int crtc_id)
 		goto free_mem;
 	}
 
-	r = drm_crtc_init_with_planes(dev, &qxl_crtc->base, primary, NULL,
+	cursor = qxl_create_plane(qdev, 1 << crtc_id, DRM_PLANE_TYPE_CURSOR);
+	if (IS_ERR(cursor)) {
+		r = -ENOMEM;
+		goto clean_primary;
+	}
+
+	r = drm_crtc_init_with_planes(dev, &qxl_crtc->base, primary, cursor,
 				      &qxl_crtc_funcs, NULL);
 	if (r)
-		goto clean_primary;
+		goto clean_cursor;
 
 	qxl_crtc->index = crtc_id;
 	drm_crtc_helper_add(&qxl_crtc->base, &qxl_crtc_helper_funcs);
 	return 0;
 
+clean_cursor:
+	drm_plane_cleanup(cursor);
+	kfree(cursor);
 clean_primary:
 	drm_plane_cleanup(primary);
 	kfree(primary);
@@ -1213,8 +1176,8 @@ int qxl_modeset_init(struct qxl_device *qdev)
 	qdev->ddev.mode_config.funcs = (void *)&qxl_mode_funcs;
 
 	/* modes will be validated against the framebuffer size */
-	qdev->ddev.mode_config.min_width = 320;
-	qdev->ddev.mode_config.min_height = 200;
+	qdev->ddev.mode_config.min_width = 0;
+	qdev->ddev.mode_config.min_height = 0;
 	qdev->ddev.mode_config.max_width = 8192;
 	qdev->ddev.mode_config.max_height = 8192;
 
diff --git a/drivers/gpu/drm/qxl/qxl_drv.h b/drivers/gpu/drm/qxl/qxl_drv.h
index 647f0926cb50..0c313e563632 100644
--- a/drivers/gpu/drm/qxl/qxl_drv.h
+++ b/drivers/gpu/drm/qxl/qxl_drv.h
@@ -134,11 +134,6 @@ struct qxl_bo_list {
 struct qxl_crtc {
 	struct drm_crtc base;
 	int index;
-	int cur_x;
-	int cur_y;
-	int hot_spot_x;
-	int hot_spot_y;
-	struct qxl_bo *cursor_bo;
 };
 
 struct qxl_output {