2 * Copyright (C) 2015 The Android Open Source Project
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #define LOG_TAG "hwc-drm-display-composition"
19 #include "drmdisplaycomposition.h"
22 #include "drmresources.h"
28 #include <unordered_set>
30 #include <cutils/log.h>
32 #include <sync/sync.h>
33 #include <xf86drmMode.h>
37 DrmDisplayComposition::~DrmDisplayComposition() {
38 if (timeline_fd_ >= 0) {
39 SignalCompositionDone();
44 int DrmDisplayComposition::Init(DrmResources *drm, DrmCrtc *crtc,
45 Importer *importer, Planner *planner,
48 crtc_ = crtc; // Can be NULL if we haven't modeset yet
53 int ret = sw_sync_timeline_create();
55 ALOGE("Failed to create sw sync timeline %d", ret);
62 bool DrmDisplayComposition::validate_composition_type(DrmCompositionType des) {
63 return type_ == DRM_COMPOSITION_TYPE_EMPTY || type_ == des;
66 int DrmDisplayComposition::CreateNextTimelineFence() {
68 return sw_sync_fence_create(timeline_fd_, "hwc drm display composition fence",
72 int DrmDisplayComposition::IncreaseTimelineToPoint(int point) {
73 int timeline_increase = point - timeline_current_;
74 if (timeline_increase <= 0)
77 int ret = sw_sync_timeline_inc(timeline_fd_, timeline_increase);
79 ALOGE("Failed to increment sync timeline %d", ret);
81 timeline_current_ = point;
86 int DrmDisplayComposition::SetLayers(DrmHwcLayer *layers, size_t num_layers,
87 bool geometry_changed) {
88 if (!validate_composition_type(DRM_COMPOSITION_TYPE_FRAME))
91 geometry_changed_ = geometry_changed;
93 for (size_t layer_index = 0; layer_index < num_layers; layer_index++) {
94 layers_.emplace_back(std::move(layers[layer_index]));
97 type_ = DRM_COMPOSITION_TYPE_FRAME;
101 int DrmDisplayComposition::SetDpmsMode(uint32_t dpms_mode) {
102 if (!validate_composition_type(DRM_COMPOSITION_TYPE_DPMS))
104 dpms_mode_ = dpms_mode;
105 type_ = DRM_COMPOSITION_TYPE_DPMS;
109 int DrmDisplayComposition::SetDisplayMode(const DrmMode &display_mode) {
110 if (!validate_composition_type(DRM_COMPOSITION_TYPE_MODESET))
112 display_mode_ = display_mode;
113 dpms_mode_ = DRM_MODE_DPMS_ON;
114 type_ = DRM_COMPOSITION_TYPE_MODESET;
118 int DrmDisplayComposition::AddPlaneDisable(DrmPlane *plane) {
119 composition_planes_.emplace_back(DrmCompositionPlane::Type::kDisable, plane,
124 static std::vector<size_t> SetBitsToVector(
125 uint64_t in, const std::vector<size_t> &index_map) {
126 std::vector<size_t> out;
127 size_t msb = sizeof(in) * 8 - 1;
128 uint64_t mask = (uint64_t)1 << msb;
129 for (size_t i = msb; mask != (uint64_t)0; i--, mask >>= 1)
131 out.push_back(index_map[i]);
135 int DrmDisplayComposition::AddPlaneComposition(DrmCompositionPlane plane) {
136 composition_planes_.emplace_back(std::move(plane));
140 void DrmDisplayComposition::SeparateLayers(DrmHwcRect<int> *exclude_rects,
141 size_t num_exclude_rects) {
142 DrmCompositionPlane *comp = NULL;
143 std::vector<size_t> dedicated_layers;
145 // Go through the composition and find the precomp layer as well as any
146 // layers that have a dedicated plane located below the precomp layer.
147 for (auto &i : composition_planes_) {
148 if (i.type() == DrmCompositionPlane::Type::kLayer) {
149 dedicated_layers.insert(dedicated_layers.end(), i.source_layers().begin(),
150 i.source_layers().end());
151 } else if (i.type() == DrmCompositionPlane::Type::kPrecomp) {
159 const std::vector<size_t> &comp_layers = comp->source_layers();
160 if (comp_layers.size() > 64) {
161 ALOGE("Failed to separate layers because there are more than 64");
165 // Index at which the actual layers begin
166 size_t layer_offset = num_exclude_rects + dedicated_layers.size();
167 if (comp_layers.size() + layer_offset > 64) {
169 "Exclusion rectangles are being truncated to make the rectangle count "
171 num_exclude_rects = 64 - comp_layers.size() - dedicated_layers.size();
174 // We inject all the exclude rects into the rects list. Any resulting rect
175 // that includes ANY of the first num_exclude_rects is rejected. After the
176 // exclude rects, we add the lower layers. The rects that intersect with
177 // these layers will be inspected and only those which are to be composited
178 // above the layer will be included in the composition regions.
179 std::vector<DrmHwcRect<int>> layer_rects(comp_layers.size() + layer_offset);
180 std::copy(exclude_rects, exclude_rects + num_exclude_rects,
181 layer_rects.begin());
183 dedicated_layers.begin(), dedicated_layers.end(),
184 layer_rects.begin() + num_exclude_rects,
185 [=](size_t layer_index) { return layers_[layer_index].display_frame; });
186 std::transform(comp_layers.begin(), comp_layers.end(),
187 layer_rects.begin() + layer_offset, [=](size_t layer_index) {
188 return layers_[layer_index].display_frame;
191 std::vector<separate_rects::RectSet<uint64_t, int>> separate_regions;
192 separate_rects::separate_rects_64(layer_rects, &separate_regions);
193 uint64_t exclude_mask = ((uint64_t)1 << num_exclude_rects) - 1;
194 uint64_t dedicated_mask = (((uint64_t)1 << dedicated_layers.size()) - 1)
195 << num_exclude_rects;
197 for (separate_rects::RectSet<uint64_t, int> ®ion : separate_regions) {
198 if (region.id_set.getBits() & exclude_mask)
201 // If a rect intersects one of the dedicated layers, we need to remove the
202 // layers from the composition region which appear *below* the dedicated
203 // layer. This effectively punches a hole through the composition layer such
204 // that the dedicated layer can be placed below the composition and not
206 uint64_t dedicated_intersect = region.id_set.getBits() & dedicated_mask;
207 for (size_t i = 0; dedicated_intersect && i < dedicated_layers.size();
209 // Only exclude layers if they intersect this particular dedicated layer
210 if (!(dedicated_intersect & (1 << (i + num_exclude_rects))))
213 for (size_t j = 0; j < comp_layers.size(); ++j) {
214 if (comp_layers[j] < dedicated_layers[i])
215 region.id_set.subtract(j + layer_offset);
218 if (!(region.id_set.getBits() >> layer_offset))
221 pre_comp_regions_.emplace_back(DrmCompositionRegion{
223 SetBitsToVector(region.id_set.getBits() >> layer_offset, comp_layers)});
227 int DrmDisplayComposition::CreateAndAssignReleaseFences() {
228 std::unordered_set<DrmHwcLayer *> squash_layers;
229 std::unordered_set<DrmHwcLayer *> pre_comp_layers;
230 std::unordered_set<DrmHwcLayer *> comp_layers;
232 for (const DrmCompositionRegion ®ion : squash_regions_) {
233 for (size_t source_layer_index : region.source_layers) {
234 DrmHwcLayer *source_layer = &layers_[source_layer_index];
235 squash_layers.emplace(source_layer);
239 for (const DrmCompositionRegion ®ion : pre_comp_regions_) {
240 for (size_t source_layer_index : region.source_layers) {
241 DrmHwcLayer *source_layer = &layers_[source_layer_index];
242 pre_comp_layers.emplace(source_layer);
243 squash_layers.erase(source_layer);
247 for (const DrmCompositionPlane &plane : composition_planes_) {
248 if (plane.type() == DrmCompositionPlane::Type::kLayer) {
249 for (auto i : plane.source_layers()) {
250 DrmHwcLayer *source_layer = &layers_[i];
251 comp_layers.emplace(source_layer);
252 pre_comp_layers.erase(source_layer);
257 for (DrmHwcLayer *layer : squash_layers) {
258 if (!layer->release_fence)
260 int ret = layer->release_fence.Set(CreateNextTimelineFence());
262 ALOGE("Failed to set the release fence (squash) %d", ret);
266 timeline_squash_done_ = timeline_;
268 for (DrmHwcLayer *layer : pre_comp_layers) {
269 if (!layer->release_fence)
271 int ret = layer->release_fence.Set(CreateNextTimelineFence());
275 timeline_pre_comp_done_ = timeline_;
277 for (DrmHwcLayer *layer : comp_layers) {
278 if (!layer->release_fence)
280 int ret = layer->release_fence.Set(CreateNextTimelineFence());
282 ALOGE("Failed to set the release fence (comp) %d", ret);
290 int DrmDisplayComposition::Plan(SquashState *squash,
291 std::vector<DrmPlane *> *primary_planes,
292 std::vector<DrmPlane *> *overlay_planes) {
293 if (type_ != DRM_COMPOSITION_TYPE_FRAME)
296 // Used to track which layers should be sent to the planner. We exclude layers
297 // that are entirely squashed so the planner can provision a precomposition
298 // layer as appropriate (ex: if 5 layers are squashed and 1 is not, we don't
299 // want to plan a precomposition layer that will be comprised of the already
301 std::map<size_t, DrmHwcLayer *> to_composite;
303 bool use_squash_framebuffer = false;
304 // Used to determine which layers were entirely squashed
305 std::vector<int> layer_squash_area(layers_.size(), 0);
306 // Used to avoid rerendering regions that were squashed
307 std::vector<DrmHwcRect<int>> exclude_rects;
308 if (squash != NULL) {
309 if (geometry_changed_) {
310 squash->Init(layers_.data(), layers_.size());
312 std::vector<bool> changed_regions;
313 squash->GenerateHistory(layers_.data(), layers_.size(), changed_regions);
315 std::vector<bool> stable_regions;
316 squash->StableRegionsWithMarginalHistory(changed_regions, stable_regions);
318 // Only if SOME region is stable
319 use_squash_framebuffer =
320 std::find(stable_regions.begin(), stable_regions.end(), true) !=
321 stable_regions.end();
323 squash->RecordHistory(layers_.data(), layers_.size(), changed_regions);
325 // Changes in which regions are squashed triggers a rerender via
327 bool render_squash = squash->RecordAndCompareSquashed(stable_regions);
329 for (size_t region_index = 0; region_index < stable_regions.size();
331 const SquashState::Region ®ion = squash->regions()[region_index];
332 if (!stable_regions[region_index])
335 exclude_rects.emplace_back(region.rect);
338 squash_regions_.emplace_back();
339 squash_regions_.back().frame = region.rect;
342 int frame_area = region.rect.area();
343 // Source layers are sorted front to back i.e. top layer has lowest
345 for (size_t layer_index = layers_.size();
346 layer_index-- > 0; // Yes, I double checked this
347 /* See condition */) {
348 if (!region.layer_refs[layer_index])
350 layer_squash_area[layer_index] += frame_area;
352 squash_regions_.back().source_layers.push_back(layer_index);
357 for (size_t i = 0; i < layers_.size(); ++i) {
358 if (layer_squash_area[i] < layers_[i].display_frame.area())
359 to_composite.emplace(std::make_pair(i, &layers_[i]));
362 for (size_t i = 0; i < layers_.size(); ++i)
363 to_composite.emplace(std::make_pair(i, &layers_[i]));
367 std::vector<DrmCompositionPlane> plan;
368 std::tie(ret, composition_planes_) =
369 planner_->ProvisionPlanes(to_composite, use_squash_framebuffer, crtc_,
370 primary_planes, overlay_planes);
372 ALOGE("Planner failed provisioning planes ret=%d", ret);
376 // Remove the planes we used from the pool before returning. This ensures they
377 // won't be reused by another display in the composition.
378 for (auto &i : composition_planes_) {
382 std::vector<DrmPlane *> *container;
383 if (i.plane()->type() == DRM_PLANE_TYPE_PRIMARY)
384 container = primary_planes;
386 container = overlay_planes;
387 for (auto j = container->begin(); j != container->end(); ++j) {
388 if (*j == i.plane()) {
395 return FinalizeComposition(exclude_rects.data(), exclude_rects.size());
398 int DrmDisplayComposition::FinalizeComposition() {
399 return FinalizeComposition(NULL, 0);
402 int DrmDisplayComposition::FinalizeComposition(DrmHwcRect<int> *exclude_rects,
403 size_t num_exclude_rects) {
404 SeparateLayers(exclude_rects, num_exclude_rects);
405 return CreateAndAssignReleaseFences();
408 static const char *DrmCompositionTypeToString(DrmCompositionType type) {
410 case DRM_COMPOSITION_TYPE_EMPTY:
412 case DRM_COMPOSITION_TYPE_FRAME:
414 case DRM_COMPOSITION_TYPE_DPMS:
416 case DRM_COMPOSITION_TYPE_MODESET:
423 static const char *DPMSModeToString(int dpms_mode) {
425 case DRM_MODE_DPMS_ON:
427 case DRM_MODE_DPMS_OFF:
434 static void DumpBuffer(const DrmHwcBuffer &buffer, std::ostringstream *out) {
436 *out << "buffer=<invalid>";
440 *out << "buffer[w/h/format]=";
441 *out << buffer->width << "/" << buffer->height << "/" << buffer->format;
444 static void DumpTransform(uint32_t transform, std::ostringstream *out) {
450 bool separator = false;
451 if (transform & DrmHwcTransform::kFlipH) {
455 if (transform & DrmHwcTransform::kFlipV) {
461 if (transform & DrmHwcTransform::kRotate90) {
467 if (transform & DrmHwcTransform::kRotate180) {
473 if (transform & DrmHwcTransform::kRotate270) {
480 uint32_t valid_bits = DrmHwcTransform::kFlipH | DrmHwcTransform::kFlipH |
481 DrmHwcTransform::kRotate90 |
482 DrmHwcTransform::kRotate180 |
483 DrmHwcTransform::kRotate270;
484 if (transform & ~valid_bits) {
492 static const char *BlendingToString(DrmHwcBlending blending) {
494 case DrmHwcBlending::kNone:
496 case DrmHwcBlending::kPreMult:
498 case DrmHwcBlending::kCoverage:
505 static void DumpRegion(const DrmCompositionRegion ®ion,
506 std::ostringstream *out) {
508 region.frame.Dump(out);
509 *out << " source_layers=(";
511 const std::vector<size_t> &source_layers = region.source_layers;
512 for (size_t i = 0; i < source_layers.size(); i++) {
513 *out << source_layers[i];
514 if (i < source_layers.size() - 1) {
522 void DrmDisplayComposition::Dump(std::ostringstream *out) const {
523 *out << "----DrmDisplayComposition"
524 << " crtc=" << (crtc_ ? crtc_->id() : -1)
525 << " type=" << DrmCompositionTypeToString(type_);
528 case DRM_COMPOSITION_TYPE_DPMS:
529 *out << " dpms_mode=" << DPMSModeToString(dpms_mode_);
531 case DRM_COMPOSITION_TYPE_MODESET:
532 *out << " display_mode=" << display_mode_.h_display() << "x"
533 << display_mode_.v_display();
539 *out << " timeline[current/squash/pre-comp/done]=" << timeline_current_ << "/"
540 << timeline_squash_done_ << "/" << timeline_pre_comp_done_ << "/"
541 << timeline_ << "\n";
543 *out << " Layers: count=" << layers_.size() << "\n";
544 for (size_t i = 0; i < layers_.size(); i++) {
545 const DrmHwcLayer &layer = layers_[i];
546 *out << " [" << i << "] ";
548 DumpBuffer(layer.buffer, out);
550 if (layer.protected_usage())
551 *out << " protected";
553 *out << " transform=";
554 DumpTransform(layer.transform, out);
555 *out << " blending[a=" << (int)layer.alpha
556 << "]=" << BlendingToString(layer.blending) << " source_crop";
557 layer.source_crop.Dump(out);
558 *out << " display_frame";
559 layer.display_frame.Dump(out);
564 *out << " Planes: count=" << composition_planes_.size() << "\n";
565 for (size_t i = 0; i < composition_planes_.size(); i++) {
566 const DrmCompositionPlane &comp_plane = composition_planes_[i];
567 *out << " [" << i << "]"
568 << " plane=" << (comp_plane.plane() ? comp_plane.plane()->id() : -1)
570 switch (comp_plane.type()) {
571 case DrmCompositionPlane::Type::kDisable:
574 case DrmCompositionPlane::Type::kLayer:
577 case DrmCompositionPlane::Type::kPrecomp:
580 case DrmCompositionPlane::Type::kSquash:
588 *out << " source_layer=";
589 for (auto i : comp_plane.source_layers()) {
595 *out << " Squash Regions: count=" << squash_regions_.size() << "\n";
596 for (size_t i = 0; i < squash_regions_.size(); i++) {
597 *out << " [" << i << "] ";
598 DumpRegion(squash_regions_[i], out);
602 *out << " Pre-Comp Regions: count=" << pre_comp_regions_.size() << "\n";
603 for (size_t i = 0; i < pre_comp_regions_.size(); i++) {
604 *out << " [" << i << "] ";
605 DumpRegion(pre_comp_regions_[i], out);