drm_hwcomposer: Use Planner interface to provision planes
Use the new Planner interface to handle the layer->plane mapping.
This allows us to simplify the Plan() function by offloading the
plane provisioning to the platform specific code.
BUG=b/28117135
TEST=Tested on ryu with a variety of window layouts/workloads
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Change-Id: I75a0c5d87a9096e7a83ecbc848c75fee42ee1131
diff --git a/drmdisplaycomposition.cpp b/drmdisplaycomposition.cpp
index d5450ff..949f4a3 100644
--- a/drmdisplaycomposition.cpp
+++ b/drmdisplaycomposition.cpp
@@ -20,6 +20,7 @@
#include "drmcrtc.h"
#include "drmplane.h"
#include "drmresources.h"
+#include "platform.h"
#include <stdlib.h>
@@ -41,10 +42,12 @@
}
int DrmDisplayComposition::Init(DrmResources *drm, DrmCrtc *crtc,
- Importer *importer, uint64_t frame_no) {
+ Importer *importer, Planner *planner,
+ uint64_t frame_no) {
drm_ = drm;
crtc_ = crtc; // Can be NULL if we haven't modeset yet
importer_ = importer;
+ planner_ = planner;
frame_no_ = frame_no;
int ret = sw_sync_timeline_create();
@@ -118,65 +121,8 @@
return 0;
}
-static size_t CountUsablePlanes(DrmCrtc *crtc,
- std::vector<DrmPlane *> *primary_planes,
- std::vector<DrmPlane *> *overlay_planes) {
- return std::count_if(
- primary_planes->begin(), primary_planes->end(),
- [=](DrmPlane *plane) { return plane->GetCrtcSupported(*crtc); }) +
- std::count_if(
- overlay_planes->begin(), overlay_planes->end(),
- [=](DrmPlane *plane) { return plane->GetCrtcSupported(*crtc); });
-}
-
-static DrmPlane *TakePlane(DrmCrtc *crtc, std::vector<DrmPlane *> *planes) {
- for (auto iter = planes->begin(); iter != planes->end(); ++iter) {
- if ((*iter)->GetCrtcSupported(*crtc)) {
- DrmPlane *plane = *iter;
- planes->erase(iter);
- return plane;
- }
- }
- return NULL;
-}
-
-static DrmPlane *TakePlane(DrmCrtc *crtc,
- std::vector<DrmPlane *> *primary_planes,
- std::vector<DrmPlane *> *overlay_planes) {
- DrmPlane *plane = TakePlane(crtc, primary_planes);
- if (plane)
- return plane;
- return TakePlane(crtc, overlay_planes);
-}
-
-void DrmDisplayComposition::EmplaceCompositionPlane(
- DrmCompositionPlane::Type type, std::vector<DrmPlane *> *primary_planes,
- std::vector<DrmPlane *> *overlay_planes) {
- DrmPlane *plane = TakePlane(crtc_, primary_planes, overlay_planes);
- if (plane == NULL) {
- ALOGE(
- "Failed to add composition plane because there are no planes "
- "remaining");
- return;
- }
- composition_planes_.emplace_back(type, plane, crtc_);
-}
-
-void DrmDisplayComposition::EmplaceCompositionPlane(
- size_t source_layer, std::vector<DrmPlane *> *primary_planes,
- std::vector<DrmPlane *> *overlay_planes) {
- DrmPlane *plane = TakePlane(crtc_, primary_planes, overlay_planes);
- if (plane == NULL) {
- ALOGE(
- "Failed to add composition plane because there are no planes "
- "remaining");
- return;
- }
- composition_planes_.emplace_back(DrmCompositionPlane::Type::kLayer, plane,
- crtc_, source_layer);
-}
-
-static std::vector<size_t> SetBitsToVector(uint64_t in, size_t *index_map) {
+static std::vector<size_t> SetBitsToVector(
+ uint64_t in, const std::vector<size_t> &index_map) {
std::vector<size_t> out;
size_t msb = sizeof(in) * 8 - 1;
uint64_t mask = (uint64_t)1 << msb;
@@ -191,9 +137,7 @@
return 0;
}
-void DrmDisplayComposition::SeparateLayers(size_t *used_layers,
- size_t num_used_layers,
- DrmHwcRect<int> *exclude_rects,
+void DrmDisplayComposition::SeparateLayers(DrmHwcRect<int> *exclude_rects,
size_t num_exclude_rects) {
DrmCompositionPlane *comp = NULL;
std::vector<size_t> dedicated_layers;
@@ -212,18 +156,19 @@
if (!comp)
return;
- if (num_used_layers > 64) {
+ const std::vector<size_t> &comp_layers = comp->source_layers();
+ if (comp_layers.size() > 64) {
ALOGE("Failed to separate layers because there are more than 64");
return;
}
// Index at which the actual layers begin
size_t layer_offset = num_exclude_rects + dedicated_layers.size();
- if (num_used_layers + layer_offset > 64) {
+ if (comp_layers.size() + layer_offset > 64) {
ALOGW(
"Exclusion rectangles are being truncated to make the rectangle count "
"fit into 64");
- num_exclude_rects = 64 - num_used_layers - dedicated_layers.size();
+ num_exclude_rects = 64 - comp_layers.size() - dedicated_layers.size();
}
// We inject all the exclude rects into the rects list. Any resulting rect
@@ -231,14 +176,14 @@
// exclude rects, we add the lower layers. The rects that intersect with
// these layers will be inspected and only those which are to be composited
// above the layer will be included in the composition regions.
- std::vector<DrmHwcRect<int>> layer_rects(num_used_layers + layer_offset);
+ std::vector<DrmHwcRect<int>> layer_rects(comp_layers.size() + layer_offset);
std::copy(exclude_rects, exclude_rects + num_exclude_rects,
layer_rects.begin());
std::transform(
dedicated_layers.begin(), dedicated_layers.end(),
layer_rects.begin() + num_exclude_rects,
[=](size_t layer_index) { return layers_[layer_index].display_frame; });
- std::transform(used_layers, used_layers + num_used_layers,
+ std::transform(comp_layers.begin(), comp_layers.end(),
layer_rects.begin() + layer_offset, [=](size_t layer_index) {
return layers_[layer_index].display_frame;
});
@@ -265,8 +210,8 @@
if (!(dedicated_intersect & (1 << (i + num_exclude_rects))))
continue;
- for (size_t j = 0; j < num_used_layers; ++j) {
- if (used_layers[j] < dedicated_layers[i])
+ for (size_t j = 0; j < comp_layers.size(); ++j) {
+ if (comp_layers[j] < dedicated_layers[i])
region.id_set.subtract(j + layer_offset);
}
}
@@ -275,7 +220,7 @@
pre_comp_regions_.emplace_back(DrmCompositionRegion{
region.rect,
- SetBitsToVector(region.id_set.getBits() >> layer_offset, used_layers)});
+ SetBitsToVector(region.id_set.getBits() >> layer_offset, comp_layers)});
}
}
@@ -344,19 +289,19 @@
if (type_ != DRM_COMPOSITION_TYPE_FRAME)
return 0;
- size_t planes_can_use =
- CountUsablePlanes(crtc_, primary_planes, overlay_planes);
- if (planes_can_use == 0) {
- ALOGE("Display %d has no usable planes", crtc_->display());
- return -ENODEV;
- }
+ // Used to track which layers should be sent to the planner. We exclude layers
+ // that are entirely squashed so the planner can provision a precomposition
+ // layer as appropriate (ex: if 5 layers are squashed and 1 is not, we don't
+ // want to plan a precomposition layer that will be comprised of the already
+ // squashed layers).
+ std::map<size_t, DrmHwcLayer *> to_composite;
bool use_squash_framebuffer = false;
// Used to determine which layers were entirely squashed
std::vector<int> layer_squash_area(layers_.size(), 0);
// Used to avoid rerendering regions that were squashed
std::vector<DrmHwcRect<int>> exclude_rects;
- if (squash != NULL && planes_can_use >= 3) {
+ if (squash != NULL) {
if (geometry_changed_) {
squash->Init(layers_.data(), layers_.size());
} else {
@@ -404,95 +349,55 @@
}
}
}
+
+ for (size_t i = 0; i < layers_.size(); ++i) {
+ if (layer_squash_area[i] < layers_[i].display_frame.area())
+ to_composite.emplace(std::make_pair(i, &layers_[i]));
+ }
+ } else {
+ for (size_t i = 0; i < layers_.size(); ++i)
+ to_composite.emplace(std::make_pair(i, &layers_[i]));
}
- // All protected layers get first usage of planes
- std::vector<size_t> layers_remaining;
- std::vector<size_t> protected_layers;
- for (size_t layer_index = 0; layer_index < layers_.size(); layer_index++) {
- if (!layers_[layer_index].protected_usage() || planes_can_use == 0) {
- layers_remaining.push_back(layer_index);
+ int ret;
+ std::vector<DrmCompositionPlane> plan;
+ std::tie(ret, composition_planes_) =
+ planner_->ProvisionPlanes(to_composite, use_squash_framebuffer, crtc_,
+ primary_planes, overlay_planes);
+ if (ret) {
+ ALOGE("Planner failed provisioning planes ret=%d", ret);
+ return ret;
+ }
+
+ // Remove the planes we used from the pool before returning. This ensures they
+ // won't be reused by another display in the composition.
+ for (auto &i : composition_planes_) {
+ if (!i.plane())
continue;
- }
- protected_layers.push_back(layer_index);
- planes_can_use--;
- }
- if (planes_can_use == 0 && layers_remaining.size() > 0) {
- for (auto i : protected_layers)
- EmplaceCompositionPlane(i, primary_planes, overlay_planes);
-
- ALOGE("Protected layers consumed all hardware planes");
- return CreateAndAssignReleaseFences();
- }
-
- std::vector<size_t> layers_remaining_if_squash;
- for (size_t layer_index : layers_remaining) {
- if (layer_squash_area[layer_index] <
- layers_[layer_index].display_frame.area())
- layers_remaining_if_squash.push_back(layer_index);
- }
-
- if (use_squash_framebuffer) {
- if (planes_can_use > 1 || layers_remaining_if_squash.size() == 0) {
- layers_remaining = std::move(layers_remaining_if_squash);
- planes_can_use--; // Reserve plane for squashing
- } else {
- use_squash_framebuffer = false; // The squash buffer is still rendered
+ std::vector<DrmPlane *> *container;
+ if (i.plane()->type() == DRM_PLANE_TYPE_PRIMARY)
+ container = primary_planes;
+ else
+ container = overlay_planes;
+ for (auto j = container->begin(); j != container->end(); ++j) {
+ if (*j == i.plane()) {
+ container->erase(j);
+ break;
+ }
}
}
- if (layers_remaining.size() > planes_can_use)
- planes_can_use--; // Reserve one for pre-compositing
-
- // Whatever planes that are not reserved get assigned a layer
- size_t last_hw_comp_layer = 0;
- size_t protected_idx = 0;
- while(last_hw_comp_layer < layers_remaining.size() && planes_can_use > 0) {
- size_t idx = layers_remaining[last_hw_comp_layer];
-
- // Put the protected layers into the composition at the right place. We've
- // already reserved them by decrementing planes_can_use, so no need to do
- // that again.
- if (protected_idx < protected_layers.size() &&
- idx > protected_layers[protected_idx]) {
- EmplaceCompositionPlane(protected_layers[protected_idx], primary_planes,
- overlay_planes);
- protected_idx++;
- continue;
- }
-
- EmplaceCompositionPlane(layers_remaining[last_hw_comp_layer],
- primary_planes, overlay_planes);
- last_hw_comp_layer++;
- planes_can_use--;
- }
-
- layers_remaining.erase(layers_remaining.begin(),
- layers_remaining.begin() + last_hw_comp_layer);
-
- // Enqueue the rest of the protected layers (if any) between the hw composited
- // overlay layers and the squash/precomp layers.
- for (size_t i = protected_idx; i < protected_layers.size(); ++i)
- EmplaceCompositionPlane(protected_layers[i], primary_planes,
- overlay_planes);
-
- if (layers_remaining.size() > 0) {
- EmplaceCompositionPlane(DrmCompositionPlane::Type::kPrecomp, primary_planes,
- overlay_planes);
- SeparateLayers(layers_remaining.data(), layers_remaining.size(),
- exclude_rects.data(), exclude_rects.size());
- }
-
- if (use_squash_framebuffer) {
- EmplaceCompositionPlane(DrmCompositionPlane::Type::kSquash, primary_planes,
- overlay_planes);
- }
-
- return FinalizeComposition();
+ return FinalizeComposition(exclude_rects.data(), exclude_rects.size());
}
int DrmDisplayComposition::FinalizeComposition() {
+ return FinalizeComposition(NULL, 0);
+}
+
+int DrmDisplayComposition::FinalizeComposition(DrmHwcRect<int> *exclude_rects,
+ size_t num_exclude_rects) {
+ SeparateLayers(exclude_rects, num_exclude_rects);
return CreateAndAssignReleaseFences();
}