/* * Copyright © 2008-2011 Kristian Høgsberg * Copyright © 2011 Intel Corporation * Copyright © 2017, 2018 Collabora, Ltd. * Copyright © 2017, 2018 General Electric Company * Copyright (c) 2018 DisplayLink (UK) Ltd. * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice (including the * next paragraph) shall be included in all copies or substantial * portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #include "config.h" #include #include #include #include #include #include "drm-internal.h" #include "linux-dmabuf.h" #include "presentation-time-server-protocol.h" enum drm_output_propose_state_mode { DRM_OUTPUT_PROPOSE_STATE_MIXED, /**< mix renderer & planes */ DRM_OUTPUT_PROPOSE_STATE_RENDERER_ONLY, /**< only assign to renderer & cursor */ DRM_OUTPUT_PROPOSE_STATE_PLANES_ONLY, /**< no renderer use, only planes */ }; static const char *const drm_output_propose_state_mode_as_string[] = { [DRM_OUTPUT_PROPOSE_STATE_MIXED] = "mixed state", [DRM_OUTPUT_PROPOSE_STATE_RENDERER_ONLY] = "render-only state", [DRM_OUTPUT_PROPOSE_STATE_PLANES_ONLY] = "plane-only state" }; static const char * drm_propose_state_mode_to_string(enum drm_output_propose_state_mode mode) { if (mode < 0 || mode >= ARRAY_LENGTH(drm_output_propose_state_mode_as_string)) return " unknown compositing mode"; return drm_output_propose_state_mode_as_string[mode]; } static struct drm_plane_state * drm_output_prepare_overlay_view(struct drm_output_state *output_state, struct weston_view *ev, enum drm_output_propose_state_mode mode) { struct drm_output *output = output_state->output; struct weston_compositor *ec = output->base.compositor; struct drm_backend *b = to_drm_backend(ec); struct drm_plane *p; struct drm_plane_state *state = NULL; struct drm_fb *fb; unsigned int i; int ret; enum { NO_PLANES, NO_PLANES_WITH_FORMAT, NO_PLANES_ACCEPTED, PLACED_ON_PLANE, } availability = NO_PLANES; assert(!b->sprites_are_broken); assert(b->atomic_modeset); fb = drm_fb_get_from_view(output_state, ev); if (!fb) { drm_debug(b, "\t\t\t\t[overlay] not placing view %p on overlay: " " couldn't get fb\n", ev); return NULL; } wl_list_for_each(p, &b->plane_list, link) { if (p->type != WDRM_PLANE_TYPE_OVERLAY) continue; if (!drm_plane_is_available(p, output)) continue; state = drm_output_state_get_plane(output_state, p); if (state->fb) { state = NULL; continue; } if (availability == NO_PLANES) availability = NO_PLANES_WITH_FORMAT; /* Check whether the format is supported */ for (i = 0; i < p->count_formats; i++) { unsigned int j; if (p->formats[i].format != fb->format->format) continue; if (fb->modifier == DRM_FORMAT_MOD_INVALID) break; for (j = 0; j < p->formats[i].count_modifiers; j++) { if (p->formats[i].modifiers[j] == fb->modifier) break; } if (j != p->formats[i].count_modifiers) break; } if (i == p->count_formats) { drm_plane_state_put_back(state); state = NULL; continue; } if (availability == NO_PLANES_WITH_FORMAT) availability = NO_PLANES_ACCEPTED; state->ev = ev; state->output = output; if (!drm_plane_state_coords_for_view(state, ev)) { drm_debug(b, "\t\t\t\t[overlay] not placing view %p on overlay: " "unsuitable transform\n", ev); drm_plane_state_put_back(state); state = NULL; continue; } /* If the surface buffer has an in-fence fd, but the plane * doesn't support fences, we can't place the buffer on this * plane. */ if (ev->surface->acquire_fence_fd >= 0 && p->props[WDRM_PLANE_IN_FENCE_FD].prop_id == 0) { drm_debug(b, "\t\t\t\t[overlay] not placing view %p on overlay: " "no in-fence support\n", ev); drm_plane_state_put_back(state); state = NULL; continue; } /* We hold one reference for the lifetime of this function; * from calling drm_fb_get_from_view, to the out label where * we unconditionally drop the reference. So, we take another * reference here to live within the state. */ state->fb = drm_fb_ref(fb); state->in_fence_fd = ev->surface->acquire_fence_fd; /* In planes-only mode, we don't have an incremental state to * test against, so we just hope it'll work. */ if (mode == DRM_OUTPUT_PROPOSE_STATE_PLANES_ONLY) { drm_debug(b, "\t\t\t\t[overlay] provisionally placing " "view %p on overlay %lu in planes-only mode\n", ev, (unsigned long) p->plane_id); availability = PLACED_ON_PLANE; goto out; } ret = drm_pending_state_test(output_state->pending_state); if (ret == 0) { drm_debug(b, "\t\t\t\t[overlay] provisionally placing " "view %p on overlay %d in mixed mode\n", ev, p->plane_id); availability = PLACED_ON_PLANE; goto out; } drm_debug(b, "\t\t\t\t[overlay] not placing view %p on overlay %lu " "in mixed mode: kernel test failed\n", ev, (unsigned long) p->plane_id); drm_plane_state_put_back(state); state = NULL; } switch (availability) { case NO_PLANES: drm_debug(b, "\t\t\t\t[overlay] not placing view %p on overlay: " "no free overlay planes\n", ev); break; case NO_PLANES_WITH_FORMAT: drm_debug(b, "\t\t\t\t[overlay] not placing view %p on overlay: " "no free overlay planes matching format %s (0x%lx) " "modifier 0x%llx\n", ev, fb->format->drm_format_name, (unsigned long) fb->format, (unsigned long long) fb->modifier); break; case NO_PLANES_ACCEPTED: case PLACED_ON_PLANE: break; } out: drm_fb_unref(fb); return state; } /** * Update the image for the current cursor surface * * @param plane_state DRM cursor plane state * @param ev Source view for cursor */ static void cursor_bo_update(struct drm_plane_state *plane_state, struct weston_view *ev) { struct drm_backend *b = plane_state->plane->backend; struct gbm_bo *bo = plane_state->fb->bo; struct weston_buffer *buffer = ev->surface->buffer_ref.buffer; uint32_t buf[b->cursor_width * b->cursor_height]; int32_t stride; uint8_t *s; int i; assert(buffer && buffer->shm_buffer); assert(buffer->shm_buffer == wl_shm_buffer_get(buffer->resource)); assert(buffer->width <= b->cursor_width); assert(buffer->height <= b->cursor_height); memset(buf, 0, sizeof buf); stride = wl_shm_buffer_get_stride(buffer->shm_buffer); s = wl_shm_buffer_get_data(buffer->shm_buffer); wl_shm_buffer_begin_access(buffer->shm_buffer); for (i = 0; i < buffer->height; i++) memcpy(buf + i * b->cursor_width, s + i * stride, buffer->width * 4); wl_shm_buffer_end_access(buffer->shm_buffer); if (gbm_bo_write(bo, buf, sizeof buf) < 0) weston_log("failed update cursor: %s\n", strerror(errno)); } static struct drm_plane_state * drm_output_prepare_cursor_view(struct drm_output_state *output_state, struct weston_view *ev) { struct drm_output *output = output_state->output; struct drm_backend *b = to_drm_backend(output->base.compositor); struct drm_plane *plane = output->cursor_plane; struct drm_plane_state *plane_state; struct wl_shm_buffer *shmbuf; bool needs_update = false; assert(!b->cursors_are_broken); if (!plane) return NULL; if (!plane->state_cur->complete) return NULL; if (plane->state_cur->output && plane->state_cur->output != output) return NULL; /* We use GBM to import SHM buffers. */ if (b->gbm == NULL) return NULL; if (ev->surface->buffer_ref.buffer == NULL) { drm_debug(b, "\t\t\t\t[cursor] not assigning view %p to cursor plane " "(no buffer available)\n", ev); return NULL; } shmbuf = wl_shm_buffer_get(ev->surface->buffer_ref.buffer->resource); if (!shmbuf) { drm_debug(b, "\t\t\t\t[cursor] not assigning view %p to cursor plane " "(buffer isn't SHM)\n", ev); return NULL; } if (wl_shm_buffer_get_format(shmbuf) != WL_SHM_FORMAT_ARGB8888) { drm_debug(b, "\t\t\t\t[cursor] not assigning view %p to cursor plane " "(format 0x%lx unsuitable)\n", ev, (unsigned long) wl_shm_buffer_get_format(shmbuf)); return NULL; } plane_state = drm_output_state_get_plane(output_state, output->cursor_plane); if (plane_state && plane_state->fb) return NULL; /* We can't scale with the legacy API, and we don't try to account for * simple cropping/translation in cursor_bo_update. */ plane_state->output = output; if (!drm_plane_state_coords_for_view(plane_state, ev)) goto err; if (plane_state->src_x != 0 || plane_state->src_y != 0 || plane_state->src_w > (unsigned) b->cursor_width << 16 || plane_state->src_h > (unsigned) b->cursor_height << 16 || plane_state->src_w != plane_state->dest_w << 16 || plane_state->src_h != plane_state->dest_h << 16) { drm_debug(b, "\t\t\t\t[cursor] not assigning view %p to cursor plane " "(positioning requires cropping or scaling)\n", ev); goto err; } /* Since we're setting plane state up front, we need to work out * whether or not we need to upload a new cursor. We can't use the * plane damage, since the planes haven't actually been calculated * yet: instead try to figure it out directly. KMS cursor planes are * pretty unique here, in that they lie partway between a Weston plane * (direct scanout) and a renderer. */ if (ev != output->cursor_view || pixman_region32_not_empty(&ev->surface->damage)) { output->current_cursor++; output->current_cursor = output->current_cursor % ARRAY_LENGTH(output->gbm_cursor_fb); needs_update = true; } output->cursor_view = ev; plane_state->ev = ev; plane_state->fb = drm_fb_ref(output->gbm_cursor_fb[output->current_cursor]); if (needs_update) { drm_debug(b, "\t\t\t\t[cursor] copying new content to cursor BO\n"); cursor_bo_update(plane_state, ev); } /* The cursor API is somewhat special: in cursor_bo_update(), we upload * a buffer which is always cursor_width x cursor_height, even if the * surface we want to promote is actually smaller than this. Manually * mangle the plane state to deal with this. */ plane_state->src_w = b->cursor_width << 16; plane_state->src_h = b->cursor_height << 16; plane_state->dest_w = b->cursor_width; plane_state->dest_h = b->cursor_height; drm_debug(b, "\t\t\t\t[cursor] provisionally assigned view %p to cursor\n", ev); return plane_state; err: drm_plane_state_put_back(plane_state); return NULL; } static struct drm_plane_state * drm_output_prepare_scanout_view(struct drm_output_state *output_state, struct weston_view *ev, enum drm_output_propose_state_mode mode) { struct drm_output *output = output_state->output; struct drm_backend *b = to_drm_backend(output->base.compositor); struct drm_plane *scanout_plane = output->scanout_plane; struct drm_plane_state *state; struct drm_fb *fb; pixman_box32_t *extents; assert(!b->sprites_are_broken); assert(b->atomic_modeset); assert(mode == DRM_OUTPUT_PROPOSE_STATE_PLANES_ONLY); /* Check the view spans exactly the output size, calculated in the * logical co-ordinate space. */ extents = pixman_region32_extents(&ev->transform.boundingbox); if (extents->x1 != output->base.x || extents->y1 != output->base.y || extents->x2 != output->base.x + output->base.width || extents->y2 != output->base.y + output->base.height) return NULL; /* If the surface buffer has an in-fence fd, but the plane doesn't * support fences, we can't place the buffer on this plane. */ if (ev->surface->acquire_fence_fd >= 0 && scanout_plane->props[WDRM_PLANE_IN_FENCE_FD].prop_id == 0) return NULL; fb = drm_fb_get_from_view(output_state, ev); if (!fb) { drm_debug(b, "\t\t\t\t[scanout] not placing view %p on scanout: " " couldn't get fb\n", ev); return NULL; } state = drm_output_state_get_plane(output_state, scanout_plane); /* The only way we can already have a buffer in the scanout plane is * if we are in mixed mode, or if a client buffer has already been * placed into scanout. The former case will never call into here, * and in the latter case, the view must have been marked as occluded, * meaning we should never have ended up here. */ assert(!state->fb); state->fb = fb; state->ev = ev; state->output = output; if (!drm_plane_state_coords_for_view(state, ev)) goto err; if (state->dest_x != 0 || state->dest_y != 0 || state->dest_w != (unsigned) output->base.current_mode->width || state->dest_h != (unsigned) output->base.current_mode->height) goto err; state->in_fence_fd = ev->surface->acquire_fence_fd; /* In plane-only mode, we don't need to test the state now, as we * will only test it once at the end. */ return state; err: drm_plane_state_put_back(state); return NULL; } static struct drm_output_state * drm_output_propose_state(struct weston_output *output_base, struct drm_pending_state *pending_state, enum drm_output_propose_state_mode mode) { struct drm_output *output = to_drm_output(output_base); struct drm_backend *b = to_drm_backend(output->base.compositor); struct drm_output_state *state; struct drm_plane_state *scanout_state = NULL; struct weston_view *ev; pixman_region32_t surface_overlap, renderer_region, occluded_region; bool planes_ok = (mode != DRM_OUTPUT_PROPOSE_STATE_RENDERER_ONLY); bool renderer_ok = (mode != DRM_OUTPUT_PROPOSE_STATE_PLANES_ONLY); int ret; assert(!output->state_last); state = drm_output_state_duplicate(output->state_cur, pending_state, DRM_OUTPUT_STATE_CLEAR_PLANES); /* We implement mixed mode by progressively creating and testing * incremental states, of scanout + overlay + cursor. Since we * walk our views top to bottom, the scanout plane is last, however * we always need it in our scene for the test modeset to be * meaningful. To do this, we steal a reference to the last * renderer framebuffer we have, if we think it's basically * compatible. If we don't have that, then we conservatively fall * back to only using the renderer for this repaint. */ if (mode == DRM_OUTPUT_PROPOSE_STATE_MIXED) { struct drm_plane *plane = output->scanout_plane; struct drm_fb *scanout_fb = plane->state_cur->fb; if (!scanout_fb || (scanout_fb->type != BUFFER_GBM_SURFACE && scanout_fb->type != BUFFER_PIXMAN_DUMB)) { drm_debug(b, "\t\t[state] cannot propose mixed mode: " "for output %s (%lu): no previous renderer " "fb\n", output->base.name, (unsigned long) output->base.id); drm_output_state_free(state); return NULL; } if (scanout_fb->width != output_base->current_mode->width || scanout_fb->height != output_base->current_mode->height) { drm_debug(b, "\t\t[state] cannot propose mixed mode " "for output %s (%lu): previous fb has " "different size\n", output->base.name, (unsigned long) output->base.id); drm_output_state_free(state); return NULL; } scanout_state = drm_plane_state_duplicate(state, plane->state_cur); drm_debug(b, "\t\t[state] using renderer FB ID %lu for mixed " "mode for output %s (%lu)\n", (unsigned long) scanout_fb->fb_id, output->base.name, (unsigned long) output->base.id); } /* * Find a surface for each sprite in the output using some heuristics: * 1) size * 2) frequency of update * 3) opacity (though some hw might support alpha blending) * 4) clipping (this can be fixed with color keys) * * The idea is to save on blitting since this should save power. * If we can get a large video surface on the sprite for example, * the main display surface may not need to update at all, and * the client buffer can be used directly for the sprite surface * as we do for flipping full screen surfaces. */ pixman_region32_init(&renderer_region); pixman_region32_init(&occluded_region); wl_list_for_each(ev, &output_base->compositor->view_list, link) { struct drm_plane_state *ps = NULL; bool force_renderer = false; pixman_region32_t clipped_view; bool totally_occluded = false; bool overlay_occluded = false; drm_debug(b, "\t\t\t[view] evaluating view %p for " "output %s (%lu)\n", ev, output->base.name, (unsigned long) output->base.id); /* If this view doesn't touch our output at all, there's no * reason to do anything with it. */ if (!(ev->output_mask & (1u << output->base.id))) { drm_debug(b, "\t\t\t\t[view] ignoring view %p " "(not on our output)\n", ev); continue; } /* We only assign planes to views which are exclusively present * on our output. */ if (ev->output_mask != (1u << output->base.id)) { drm_debug(b, "\t\t\t\t[view] not assigning view %p to plane " "(on multiple outputs)\n", ev); force_renderer = true; } if (!ev->surface->buffer_ref.buffer) { drm_debug(b, "\t\t\t\t[view] not assigning view %p to plane " "(no buffer available)\n", ev); force_renderer = true; } /* Ignore views we know to be totally occluded. */ pixman_region32_init(&clipped_view); pixman_region32_intersect(&clipped_view, &ev->transform.boundingbox, &output->base.region); pixman_region32_init(&surface_overlap); pixman_region32_subtract(&surface_overlap, &clipped_view, &occluded_region); totally_occluded = !pixman_region32_not_empty(&surface_overlap); if (totally_occluded) { drm_debug(b, "\t\t\t\t[view] ignoring view %p " "(occluded on our output)\n", ev); pixman_region32_fini(&surface_overlap); pixman_region32_fini(&clipped_view); continue; } /* 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_intersect(&surface_overlap, &renderer_region, &clipped_view); if (pixman_region32_not_empty(&surface_overlap)) { drm_debug(b, "\t\t\t\t[view] not assigning view %p to plane " "(occluded by renderer views)\n", ev); force_renderer = true; } /* We do not control the stacking order of overlay planes; * the scanout plane is strictly stacked bottom and the cursor * plane top, but the ordering of overlay planes with respect * to each other is undefined. Make sure we do not have two * planes overlapping each other. */ pixman_region32_intersect(&surface_overlap, &occluded_region, &clipped_view); if (pixman_region32_not_empty(&surface_overlap)) { drm_debug(b, "\t\t\t\t[view] not assigning view %p to plane " "(occluded by other overlay planes)\n", ev); overlay_occluded = true; } pixman_region32_fini(&surface_overlap); /* The cursor plane is 'special' in the sense that we can still * place it in the legacy API, and we gate that with a separate * cursors_are_broken flag. */ if (!force_renderer && !overlay_occluded && !b->cursors_are_broken) ps = drm_output_prepare_cursor_view(state, ev); /* If sprites are disabled or the view is not fully opaque, we * must put the view into the renderer - unless it has already * been placed in the cursor plane, which can handle alpha. */ if (!ps && !planes_ok) { drm_debug(b, "\t\t\t\t[view] not assigning view %p to plane " "(precluded by mode)\n", ev); force_renderer = true; } if (!ps && !weston_view_is_opaque(ev, &clipped_view)) { drm_debug(b, "\t\t\t\t[view] not assigning view %p to plane " "(view not fully opaque)\n", ev); force_renderer = true; } /* Only try to place scanout surfaces in planes-only mode; in * mixed mode, we have already failed to place a view on the * scanout surface, forcing usage of the renderer on the * scanout plane. */ if (!ps && !force_renderer && !renderer_ok) ps = drm_output_prepare_scanout_view(state, ev, mode); if (!ps && !overlay_occluded && !force_renderer) ps = drm_output_prepare_overlay_view(state, ev, mode); if (ps) { /* If we have been assigned to an overlay or scanout * plane, add this area to the occluded region, so * other views are known to be behind it. The cursor * plane, however, is special, in that it blends with * the content underneath it: the area should neither * be added to the renderer region nor the occluded * region. */ if (ps->plane->type != WDRM_PLANE_TYPE_CURSOR) { pixman_region32_union(&occluded_region, &occluded_region, &clipped_view); pixman_region32_fini(&clipped_view); } continue; } /* We have been assigned to the primary (renderer) plane: * check if this is OK, and add ourselves to the renderer * region if so. */ if (!renderer_ok) { drm_debug(b, "\t\t[view] failing state generation: " "placing view %p to renderer not allowed\n", ev); pixman_region32_fini(&clipped_view); goto err_region; } pixman_region32_union(&renderer_region, &renderer_region, &clipped_view); pixman_region32_fini(&clipped_view); } pixman_region32_fini(&renderer_region); pixman_region32_fini(&occluded_region); /* In renderer-only mode, we can't test the state as we don't have a * renderer buffer yet. */ if (mode == DRM_OUTPUT_PROPOSE_STATE_RENDERER_ONLY) return state; /* Check to see if this state will actually work. */ ret = drm_pending_state_test(state->pending_state); if (ret != 0) { drm_debug(b, "\t\t[view] failing state generation: " "atomic test not OK\n"); goto err; } /* Counterpart to duplicating scanout state at the top of this * function: if we have taken a renderer framebuffer and placed it in * the pending state in order to incrementally test overlay planes, * remove it now. */ if (mode == DRM_OUTPUT_PROPOSE_STATE_MIXED) { assert(scanout_state->fb->type == BUFFER_GBM_SURFACE || scanout_state->fb->type == BUFFER_PIXMAN_DUMB); drm_plane_state_put_back(scanout_state); } return state; err_region: pixman_region32_fini(&renderer_region); pixman_region32_fini(&occluded_region); err: drm_output_state_free(state); return NULL; } 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 = NULL; struct drm_plane_state *plane_state; struct weston_view *ev; struct weston_plane *primary = &output_base->compositor->primary_plane; enum drm_output_propose_state_mode mode = DRM_OUTPUT_PROPOSE_STATE_PLANES_ONLY; drm_debug(b, "\t[repaint] preparing state for output %s (%lu)\n", output_base->name, (unsigned long) output_base->id); if (!b->sprites_are_broken && !output->virtual) { drm_debug(b, "\t[repaint] trying planes-only build state\n"); state = drm_output_propose_state(output_base, pending_state, mode); if (!state) { drm_debug(b, "\t[repaint] could not build planes-only " "state, trying mixed\n"); mode = DRM_OUTPUT_PROPOSE_STATE_MIXED; state = drm_output_propose_state(output_base, pending_state, mode); } if (!state) { drm_debug(b, "\t[repaint] could not build mixed-mode " "state, trying renderer-only\n"); } } else { drm_debug(b, "\t[state] no overlay plane support\n"); } if (!state) { mode = DRM_OUTPUT_PROPOSE_STATE_RENDERER_ONLY; state = drm_output_propose_state(output_base, pending_state, mode); } assert(state); drm_debug(b, "\t[repaint] Using %s composition\n", drm_propose_state_mode_to_string(mode)); wl_list_for_each(ev, &output_base->compositor->view_list, link) { struct drm_plane *target_plane = NULL; /* If this view doesn't touch our output at all, there's no * reason to do anything with it. */ if (!(ev->output_mask & (1u << output->base.id))) continue; /* 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) { drm_debug(b, "\t[repaint] view %p on %s plane %lu\n", ev, plane_type_enums[target_plane->type].name, (unsigned long) target_plane->plane_id); weston_view_move_to_plane(ev, &target_plane->base); } else { drm_debug(b, "\t[repaint] view %p using renderer " "composition\n", ev); 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 * single client buffer. */ ev->psf_flags = WP_PRESENTATION_FEEDBACK_KIND_ZERO_COPY; } } /* We rely on output->cursor_view being both an accurate reflection of * the cursor plane's state, but also being maintained across repaints * to avoid unnecessary damage uploads, per the comment in * drm_output_prepare_cursor_view. In the event that we go from having * a cursor view to not having a cursor view, we need to clear it. */ if (output->cursor_view) { plane_state = drm_output_state_get_existing_plane(state, output->cursor_plane); if (!plane_state || !plane_state->fb) output->cursor_view = NULL; } }