Ozone integration.

ui/ozone/platform/drm/gpu/hardware_display_plane_manager.cc

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ui/ozone/platform/drm/gpu/hardware_display_plane_manager.h"
+
+#include <drm.h>
+#include <xf86drm.h>
+
+#include <set>
+
+#include "base/logging.h"
+#include "ui/gfx/geometry/rect.h"
+#include "ui/ozone/platform/drm/gpu/crtc_controller.h"
+#include "ui/ozone/platform/drm/gpu/drm_device.h"
+#include "ui/ozone/platform/drm/gpu/hardware_display_controller.h"
+#include "ui/ozone/platform/drm/gpu/scanout_buffer.h"
+#include "ui/ozone/public/ozone_switches.h"
+
+namespace ui {
+namespace {
+
+const float kFixedPointScaleValue = 65536.0f;
+
+}  // namespace
+
+HardwareDisplayPlaneList::HardwareDisplayPlaneList() {
+#if defined(USE_DRM_ATOMIC)
+  atomic_property_set.reset(drmModePropertySetAlloc());
+#endif  // defined(USE_DRM_ATOMIC)
+}
+
+HardwareDisplayPlaneList::~HardwareDisplayPlaneList() {
+  for (auto* plane : plane_list) {
+    plane->set_in_use(false);
+    plane->set_owning_crtc(0);
+  }
+  for (auto* plane : old_plane_list) {
+    plane->set_in_use(false);
+    plane->set_owning_crtc(0);
+  }
+}
+
+HardwareDisplayPlaneList::PageFlipInfo::PageFlipInfo(uint32_t crtc_id,
+                                                     uint32_t framebuffer,
+                                                     CrtcController* crtc)
+    : crtc_id(crtc_id), framebuffer(framebuffer), crtc(crtc) {
+}
+
+HardwareDisplayPlaneList::PageFlipInfo::~PageFlipInfo() {
+}
+
+HardwareDisplayPlaneList::PageFlipInfo::Plane::Plane(int plane,
+                                                     int framebuffer,
+                                                     const gfx::Rect& bounds,
+                                                     const gfx::Rect& src_rect)
+    : plane(plane),
+      framebuffer(framebuffer),
+      bounds(bounds),
+      src_rect(src_rect) {
+}
+
+HardwareDisplayPlaneList::PageFlipInfo::Plane::~Plane() {
+}
+
+HardwareDisplayPlaneManager::HardwareDisplayPlaneManager() : drm_(nullptr) {
+}
+
+HardwareDisplayPlaneManager::~HardwareDisplayPlaneManager() {
+}
+
+bool HardwareDisplayPlaneManager::Initialize(DrmDevice* drm) {
+  drm_ = drm;
+
+  // Try to get all of the planes if possible, so we don't have to try to
+  // discover hidden primary planes.
+  bool has_universal_planes = false;
+#if defined(DRM_CLIENT_CAP_UNIVERSAL_PLANES)
+  has_universal_planes = drm->SetCapability(DRM_CLIENT_CAP_UNIVERSAL_PLANES, 1);
+#endif  // defined(DRM_CLIENT_CAP_UNIVERSAL_PLANES)
+
+  ScopedDrmResourcesPtr resources(drmModeGetResources(drm->get_fd()));
+  if (!resources) {
+    PLOG(ERROR) << "Failed to get resources";
+    return false;
+  }
+
+  ScopedDrmPlaneResPtr plane_resources(drmModeGetPlaneResources(drm->get_fd()));
+  if (!plane_resources) {
+    PLOG(ERROR) << "Failed to get plane resources";
+    return false;
+  }
+
+  crtcs_.clear();
+  for (int i = 0; i < resources->count_crtcs; ++i) {
+    crtcs_.push_back(resources->crtcs[i]);
+  }
+
+  uint32_t num_planes = plane_resources->count_planes;
+  std::set<uint32_t> plane_ids;
+  for (uint32_t i = 0; i < num_planes; ++i) {
+    ScopedDrmPlanePtr drm_plane(
+        drmModeGetPlane(drm->get_fd(), plane_resources->planes[i]));
+    if (!drm_plane) {
+      PLOG(ERROR) << "Failed to get plane " << i;
+      return false;
+    }
+    plane_ids.insert(drm_plane->plane_id);
+    scoped_ptr<HardwareDisplayPlane> plane(
+        CreatePlane(drm_plane->plane_id, drm_plane->possible_crtcs));
+    if (plane->Initialize(drm))
+      planes_.push_back(plane.Pass());
+  }
+
+  // crbug.com/464085: if driver reports no primary planes for a crtc, create a
+  // dummy plane for which we can assign exactly one overlay.
+  // TODO(dnicoara): refactor this to simplify AssignOverlayPlanes and move
+  // this workaround into HardwareDisplayPlaneLegacy.
+  if (!has_universal_planes) {
+    for (int i = 0; i < resources->count_crtcs; ++i) {
+      if (plane_ids.find(resources->crtcs[i] - 1) == plane_ids.end()) {
+        scoped_ptr<HardwareDisplayPlane> dummy_plane(
+            CreatePlane(resources->crtcs[i] - 1, (1 << i)));
+        dummy_plane->set_is_dummy(true);
+        if (dummy_plane->Initialize(drm))
+          planes_.push_back(dummy_plane.Pass());
+      }
+    }
+  }
+
+  std::sort(planes_.begin(), planes_.end(),
+            [](HardwareDisplayPlane* l, HardwareDisplayPlane* r) {
+              return l->plane_id() < r->plane_id();
+            });
+  return true;
+}
+
+scoped_ptr<HardwareDisplayPlane> HardwareDisplayPlaneManager::CreatePlane(
+    uint32_t plane_id,
+    uint32_t possible_crtcs) {
+  return scoped_ptr<HardwareDisplayPlane>(
+      new HardwareDisplayPlane(plane_id, possible_crtcs));
+}
+
+HardwareDisplayPlane* HardwareDisplayPlaneManager::FindNextUnusedPlane(
+    size_t* index,
+    uint32_t crtc_index) {
+  for (size_t i = *index; i < planes_.size(); ++i) {
+    auto plane = planes_[i];
+    if (!plane->in_use() && plane->CanUseForCrtc(crtc_index)) {
+      *index = i + 1;
+      return plane;
+    }
+  }
+  return nullptr;
+}
+
+int HardwareDisplayPlaneManager::LookupCrtcIndex(uint32_t crtc_id) {
+  for (size_t i = 0; i < crtcs_.size(); ++i)
+    if (crtcs_[i] == crtc_id)
+      return i;
+  return -1;
+}
+
+void HardwareDisplayPlaneManager::BeginFrame(
+    HardwareDisplayPlaneList* plane_list) {
+  for (auto* plane : plane_list->old_plane_list) {
+    plane->set_in_use(false);
+  }
+}
+
+bool HardwareDisplayPlaneManager::AssignOverlayPlanes(
+    HardwareDisplayPlaneList* plane_list,
+    const OverlayPlaneList& overlay_list,
+    uint32_t crtc_id,
+    CrtcController* crtc) {
+  int crtc_index = LookupCrtcIndex(crtc_id);
+  if (crtc_index < 0) {
+    LOG(ERROR) << "Cannot find crtc " << crtc_id;
+    return false;
+  }
+
+  size_t plane_idx = 0;
+  for (const auto& plane : overlay_list) {
+    HardwareDisplayPlane* hw_plane =
+        FindNextUnusedPlane(&plane_idx, crtc_index);
+    if (!hw_plane) {
+      LOG(ERROR) << "Failed to find a free plane for crtc " << crtc_id;
+      return false;
+    }
+
+    gfx::Rect fixed_point_rect;
+    if (!hw_plane->is_dummy()) {
+      const gfx::Size& size = plane.buffer->GetSize();
+      gfx::RectF crop_rect = plane.crop_rect;
+      crop_rect.Scale(size.width(), size.height());
+
+      // This returns a number in 16.16 fixed point, required by the DRM overlay
+      // APIs.
+      auto to_fixed_point =
+          [](double v) -> uint32_t { return v * kFixedPointScaleValue; };
+      fixed_point_rect = gfx::Rect(to_fixed_point(crop_rect.x()),
+                                   to_fixed_point(crop_rect.y()),
+                                   to_fixed_point(crop_rect.width()),
+                                   to_fixed_point(crop_rect.height()));
+    }
+
+    plane_list->plane_list.push_back(hw_plane);
+    hw_plane->set_owning_crtc(crtc_id);
+    if (SetPlaneData(plane_list, hw_plane, plane, crtc_id, fixed_point_rect,
+                     crtc)) {
+      hw_plane->set_in_use(true);
+    } else {
+      return false;
+    }
+  }
+  return true;
+}
+
+void HardwareDisplayPlaneManager::ResetPlanes(
+    HardwareDisplayPlaneList* plane_list,
+    uint32_t crtc_id) {
+  std::vector<HardwareDisplayPlane*> planes;
+  planes.swap(plane_list->old_plane_list);
+  for (auto* plane : planes) {
+    if (plane->owning_crtc() == crtc_id) {
+      plane->set_owning_crtc(0);
+      plane->set_in_use(false);
+    } else {
+      plane_list->old_plane_list.push_back(plane);
+    }
+  }
+}
+
+}  // namespace ui