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

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/ozone/platform/drm/gpu/hardware_display_plane_manager_legacy.h"
   6
   7 #include "base/bind.h"
   8 #include "ui/ozone/platform/drm/gpu/crtc_controller.h"
   9 #include "ui/ozone/platform/drm/gpu/drm_device.h"
  10 #include "ui/ozone/platform/drm/gpu/scanout_buffer.h"
  11
  12 namespace ui {
  13
  14 HardwareDisplayPlaneManagerLegacy::HardwareDisplayPlaneManagerLegacy() {
  15 }
  16
  17 HardwareDisplayPlaneManagerLegacy::~HardwareDisplayPlaneManagerLegacy() {
  18 }
  19
  20 bool HardwareDisplayPlaneManagerLegacy::Commit(
  21     HardwareDisplayPlaneList* plane_list,
  22     bool test_only) {
  23   if (test_only) {
  24     for (HardwareDisplayPlane* plane : plane_list->plane_list) {
  25       plane->set_in_use(false);
  26     }
  27     plane_list->plane_list.clear();
  28     plane_list->legacy_page_flips.clear();
  29     return true;
  30   }
  31   if (plane_list->plane_list.empty())  // No assigned planes, nothing to do.
  32     return true;
  33   bool ret = true;
  34   // The order of operations here (set new planes, pageflip, clear old planes)
  35   // is designed to minimze the chance of a significant artifact occurring.
  36   // The planes must be updated first because the main plane no longer contains
  37   // their content. The old planes are removed last because the previous primary
  38   // plane used them as overlays and thus didn't contain their content, so we
  39   // must first flip to the new primary plane, which does. The error here will
  40   // be the delta of (new contents, old contents), but it should be barely
  41   // noticeable.
  42   for (const auto& flip : plane_list->legacy_page_flips) {
  43     // Permission Denied is a legitimate error
  44     for (const auto& plane : flip.planes) {
  45       if (!drm_->PageFlipOverlay(flip.crtc_id, plane.framebuffer, plane.bounds,
  46                                  plane.src_rect, plane.plane)) {
  47         PLOG(ERROR) << "Cannot display plane on overlay: crtc=" << flip.crtc
  48                     << " plane=" << plane.plane;
  49         ret = false;
  50         flip.crtc->PageFlipFailed();
  51         break;
  52       }
  53     }
  54     if (!drm_->PageFlip(flip.crtc_id, flip.framebuffer,
  55                         base::Bind(&CrtcController::OnPageFlipEvent,
  56                                    flip.crtc->AsWeakPtr()))) {
  57       if (errno != EACCES) {
  58         PLOG(ERROR) << "Cannot page flip: crtc=" << flip.crtc_id
  59                     << " framebuffer=" << flip.framebuffer;
  60         ret = false;
  61       }
  62       flip.crtc->PageFlipFailed();
  63     }
  64   }
  65   // For each element in |old_plane_list|, if it hasn't been reclaimed (by
  66   // this or any other HDPL), clear the overlay contents.
  67   for (HardwareDisplayPlane* plane : plane_list->old_plane_list) {
  68     if (!plane->in_use() && (plane->type() != HardwareDisplayPlane::kDummy)) {
  69       // This plane is being released, so we need to zero it.
  70       if (!drm_->PageFlipOverlay(plane->owning_crtc(), 0, gfx::Rect(),
  71                                  gfx::Rect(), plane->plane_id())) {
  72         PLOG(ERROR) << "Cannot free overlay: crtc=" << plane->owning_crtc()
  73                     << " plane=" << plane->plane_id();
  74         ret = false;
  75         break;
  76       }
  77     }
  78   }
  79   plane_list->plane_list.swap(plane_list->old_plane_list);
  80   plane_list->plane_list.clear();
  81   plane_list->legacy_page_flips.clear();
  82   return ret;
  83 }
  84
  85 bool HardwareDisplayPlaneManagerLegacy::SetPlaneData(
  86     HardwareDisplayPlaneList* plane_list,
  87     HardwareDisplayPlane* hw_plane,
  88     const OverlayPlane& overlay,
  89     uint32_t crtc_id,
  90     const gfx::Rect& src_rect,
  91     CrtcController* crtc) {
  92   if ((hw_plane->type() == HardwareDisplayPlane::kDummy) ||
  93       plane_list->legacy_page_flips.empty() ||
  94       plane_list->legacy_page_flips.back().crtc_id != crtc_id) {
  95     plane_list->legacy_page_flips.push_back(
  96         HardwareDisplayPlaneList::PageFlipInfo(
  97             crtc_id, overlay.buffer->GetFramebufferId(), crtc));
  98   } else {
  99     plane_list->legacy_page_flips.back().planes.push_back(
 100         HardwareDisplayPlaneList::PageFlipInfo::Plane(
 101             hw_plane->plane_id(), overlay.buffer->GetFramebufferId(),
 102             overlay.display_bounds, src_rect));
 103   }
 104   return true;
 105 }
 106
 107 }  // namespace ui