[PATCH v14 32/41] compositor-drm: Split drm_assign_planes in two
Daniel Stone
daniels at collabora.com
Wed Dec 20 12:26:49 UTC 2017
Move drm_assign_planes into two functions: one which proposes a plane
configuration, and another which applies that state to the Weston
internal structures. This will be used to try multiple configurations
and see which is supported.
Signed-off-by: Daniel Stone <daniels at collabora.com>
---
libweston/compositor-drm.c | 109 ++++++++++++++++++++++++++++++---------------
1 file changed, 74 insertions(+), 35 deletions(-)
diff --git a/libweston/compositor-drm.c b/libweston/compositor-drm.c
index 3ff06c01c..049c80932 100644
--- a/libweston/compositor-drm.c
+++ b/libweston/compositor-drm.c
@@ -357,6 +357,8 @@ struct drm_plane_state {
struct drm_fb *fb;
+ struct weston_view *ev; /**< maintained for drm_assign_planes only */
+
int32_t src_x, src_y;
uint32_t src_w, src_h;
int32_t dest_x, dest_y;
@@ -1798,6 +1800,7 @@ drm_output_prepare_scanout_view(struct drm_output_state *output_state,
}
state->fb = fb;
+ state->ev = ev;
state->output = output;
drm_plane_state_coords_for_view(state, ev);
@@ -2847,6 +2850,7 @@ drm_output_prepare_overlay_view(struct drm_output_state *output_state,
}
state->fb = fb;
+ state->ev = ev;
state->output = output;
drm_plane_state_coords_for_view(state, ev);
@@ -2983,6 +2987,7 @@ drm_output_prepare_cursor_view(struct drm_output_state *output_state,
}
output->cursor_view = ev;
+ plane_state->ev = ev;
plane_state->fb =
drm_fb_ref(output->gbm_cursor_fb[output->current_cursor]);
@@ -3050,17 +3055,15 @@ err:
drmModeSetCursor(b->drm.fd, output->crtc_id, 0, 0, 0);
}
-static void
-drm_assign_planes(struct weston_output *output_base, void *repaint_data)
+static struct drm_output_state *
+drm_output_propose_state(struct weston_output *output_base,
+ struct drm_pending_state *pending_state)
{
- struct drm_backend *b = to_drm_backend(output_base->compositor);
- struct drm_pending_state *pending_state = repaint_data;
struct drm_output *output = to_drm_output(output_base);
struct drm_output_state *state;
- struct drm_plane_state *plane_state;
struct weston_view *ev;
pixman_region32_t surface_overlap, renderer_region;
- struct weston_plane *primary, *next_plane;
+ struct weston_plane *primary = &output_base->compositor->primary_plane;
assert(!output->state_last);
state = drm_output_state_duplicate(output->state_cur,
@@ -3081,35 +3084,21 @@ drm_assign_planes(struct weston_output *output_base, void *repaint_data)
* as we do for flipping full screen surfaces.
*/
pixman_region32_init(&renderer_region);
- primary = &output_base->compositor->primary_plane;
wl_list_for_each(ev, &output_base->compositor->view_list, link) {
- struct weston_surface *es = ev->surface;
-
- /* Test whether this buffer can ever go into a plane:
- * non-shm, or small enough to be a cursor.
- *
- * Also, keep a reference when using the pixman renderer.
- * That makes it possible to do a seamless switch to the GL
- * renderer and since the pixman renderer keeps a reference
- * to the buffer anyway, there is no side effects.
- */
- if (b->use_pixman ||
- (es->buffer_ref.buffer &&
- (!wl_shm_buffer_get(es->buffer_ref.buffer->resource) ||
- (ev->surface->width <= b->cursor_width &&
- ev->surface->height <= b->cursor_height))))
- es->keep_buffer = true;
- else
- es->keep_buffer = false;
+ struct weston_plane *next_plane = NULL;
+ /* Since we process views from top to bottom, we know that if
+ * the view intersects the calculated renderer region, it must
+ * be part of, or occluded by, it, and cannot go on a plane. */
pixman_region32_init(&surface_overlap);
pixman_region32_intersect(&surface_overlap, &renderer_region,
&ev->transform.boundingbox);
- next_plane = NULL;
if (pixman_region32_not_empty(&surface_overlap))
next_plane = primary;
+ pixman_region32_fini(&surface_overlap);
+
if (next_plane == NULL)
next_plane = drm_output_prepare_cursor_view(state, ev);
@@ -3122,17 +3111,70 @@ drm_assign_planes(struct weston_output *output_base, void *repaint_data)
if (next_plane == NULL)
next_plane = primary;
- weston_view_move_to_plane(ev, next_plane);
-
if (next_plane == primary)
pixman_region32_union(&renderer_region,
&renderer_region,
&ev->transform.boundingbox);
+ }
+ pixman_region32_fini(&renderer_region);
+
+ return state;
+}
+
+static void
+drm_assign_planes(struct weston_output *output_base, void *repaint_data)
+{
+ struct drm_backend *b = to_drm_backend(output_base->compositor);
+ struct drm_pending_state *pending_state = repaint_data;
+ struct drm_output *output = to_drm_output(output_base);
+ struct drm_output_state *state;
+ struct drm_plane_state *plane_state;
+ struct weston_view *ev;
+ struct weston_plane *primary = &output_base->compositor->primary_plane;
+
+ state = drm_output_propose_state(output_base, pending_state);
- if (next_plane == primary ||
- (output->cursor_plane &&
- next_plane == &output->cursor_plane->base)) {
- /* cursor plane involves a copy */
+ wl_list_for_each(ev, &output_base->compositor->view_list, link) {
+ struct drm_plane *target_plane = NULL;
+
+ /* Test whether this buffer can ever go into a plane:
+ * non-shm, or small enough to be a cursor.
+ *
+ * Also, keep a reference when using the pixman renderer.
+ * That makes it possible to do a seamless switch to the GL
+ * renderer and since the pixman renderer keeps a reference
+ * to the buffer anyway, there is no side effects.
+ */
+ if (b->use_pixman ||
+ (ev->surface->buffer_ref.buffer &&
+ (!wl_shm_buffer_get(ev->surface->buffer_ref.buffer->resource) ||
+ (ev->surface->width <= b->cursor_width &&
+ ev->surface->height <= b->cursor_height))))
+ ev->surface->keep_buffer = true;
+ else
+ ev->surface->keep_buffer = false;
+
+ /* This is a bit unpleasant, but lacking a temporary place to
+ * hang a plane off the view, we have to do a nested walk.
+ * Our first-order iteration has to be planes rather than
+ * views, because otherwise we won't reset views which were
+ * previously on planes to being on the primary plane. */
+ wl_list_for_each(plane_state, &state->plane_list, link) {
+ if (plane_state->ev == ev) {
+ plane_state->ev = NULL;
+ target_plane = plane_state->plane;
+ break;
+ }
+ }
+
+ if (target_plane)
+ weston_view_move_to_plane(ev, &target_plane->base);
+ else
+ weston_view_move_to_plane(ev, primary);
+
+ if (!target_plane ||
+ target_plane->type == WDRM_PLANE_TYPE_CURSOR) {
+ /* cursor plane & renderer involve a copy */
ev->psf_flags = 0;
} else {
/* All other planes are a direct scanout of a
@@ -3140,10 +3182,7 @@ drm_assign_planes(struct weston_output *output_base, void *repaint_data)
*/
ev->psf_flags = WP_PRESENTATION_FEEDBACK_KIND_ZERO_COPY;
}
-
- pixman_region32_fini(&surface_overlap);
}
- pixman_region32_fini(&renderer_region);
/* We rely on output->cursor_view being both an accurate reflection of
* the cursor plane's state, but also being maintained across repaints
--
2.14.3
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