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// Copyright 2015 The Chromium Authors
// 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/drm_overlay_validator.h"
#include <memory>
#include <utility>
#include <variant>
#include <vector>
#include "base/metrics/histogram_macros.h"
#include "base/timer/elapsed_timer.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/geometry/rect_conversions.h"
#include "ui/gfx/gpu_fence.h"
#include "ui/gfx/linux/drm_util_linux.h"
#include "ui/gfx/linux/gbm_buffer.h"
#include "ui/gfx/linux/gbm_device.h"
#include "ui/ozone/platform/drm/common/drm_util.h"
#include "ui/ozone/platform/drm/gpu/drm_device.h"
#include "ui/ozone/platform/drm/gpu/drm_framebuffer.h"
#include "ui/ozone/platform/drm/gpu/drm_window.h"
#include "ui/ozone/platform/drm/gpu/gbm_pixmap.h"
#include "ui/ozone/platform/drm/gpu/hardware_display_controller.h"
namespace ui {
namespace {
scoped_refptr<DrmFramebuffer> GetBufferForPageFlipTest(
const DrmWindow* drm_window,
const OverlaySurfaceCandidate& overlay_surface,
std::vector<scoped_refptr<DrmFramebuffer>>* reusable_buffers) {
if (overlay_surface.native_pixmap) {
return static_cast<GbmPixmap*>(overlay_surface.native_pixmap.get())
->framebuffer();
}
uint32_t fourcc_format =
overlay_surface.is_opaque
? GetFourCCFormatForOpaqueFramebuffer(overlay_surface.format)
: GetFourCCFormatFromBufferFormat(overlay_surface.format);
gfx::Size size = overlay_surface.buffer_size;
bool is_0th_plane = !overlay_surface.plane_z_order;
// Force the 0th plane (e.g. primary plane and fullscreen) with the modifiers
// used in existing buffers to keep the test consistent with the subsequent
// flip commits.
std::vector<uint64_t> modifiers =
is_0th_plane
? drm_window->GetController()->GetSupportedModifiers(fourcc_format)
: std::vector<uint64_t>();
// Check if we can re-use existing buffers.
for (const auto& buf : *reusable_buffers) {
if (buf->framebuffer_pixel_format() == fourcc_format &&
buf->size() == size && buf->preferred_modifiers() == modifiers) {
return buf;
}
}
scoped_refptr<DrmDevice> drm_device =
drm_window->GetController()->GetDrmDevice();
std::unique_ptr<GbmBuffer> buffer =
is_0th_plane ? drm_device->gbm_device()->CreateBufferWithModifiers(
fourcc_format, size, GBM_BO_USE_SCANOUT, modifiers)
: drm_device->gbm_device()->CreateBuffer(fourcc_format, size,
GBM_BO_USE_SCANOUT);
if (!buffer)
return nullptr;
constexpr bool kIsOriginalBuffer = false;
scoped_refptr<DrmFramebuffer> drm_framebuffer =
DrmFramebuffer::AddFramebuffer(drm_device, buffer.get(),
buffer->GetSize(), modifiers,
kIsOriginalBuffer);
if (!drm_framebuffer)
return nullptr;
reusable_buffers->push_back(drm_framebuffer);
return drm_framebuffer;
}
} // namespace
DrmOverlayValidator::DrmOverlayValidator(DrmWindow* window) : window_(window) {}
DrmOverlayValidator::~DrmOverlayValidator() = default;
DrmOverlayPlane DrmOverlayValidator::MakeOverlayPlane(
const OverlaySurfaceCandidate& param,
std::vector<scoped_refptr<DrmFramebuffer>>& reusable_buffers) {
scoped_refptr<DrmFramebuffer> buffer =
GetBufferForPageFlipTest(window_, param, &reusable_buffers);
return DrmOverlayPlane(buffer, param.color_space, param.plane_z_order,
std::get<gfx::OverlayTransform>(param.transform),
gfx::ToNearestRect(param.display_rect),
gfx::ToNearestRect(param.display_rect),
param.crop_rect, !param.is_opaque,
/*gpu_fence=*/nullptr);
}
OverlayStatusList DrmOverlayValidator::TestPageFlip(
const OverlaySurfaceCandidateList& params,
const DrmOverlayPlaneList& last_used_planes) {
OverlayStatusList returns(params.size());
HardwareDisplayController* controller = window_->GetController();
if (!controller) {
// The controller is not yet installed.
for (auto& status : returns) {
status = OVERLAY_STATUS_NOT;
}
return returns;
}
DrmOverlayPlaneList test_list;
std::vector<scoped_refptr<DrmFramebuffer>> reusable_buffers;
scoped_refptr<DrmDevice> drm = controller->GetDrmDevice();
for (const auto& plane : last_used_planes) {
reusable_buffers.push_back(plane.buffer);
}
std::vector<size_t> plane_indices;
for (size_t i = 0; i < params.size(); ++i) {
auto& param = params[i];
// Skip candidates that have already been disqualified.
if (!param.overlay_handled) {
returns[i] = OVERLAY_STATUS_NOT;
continue;
}
DrmOverlayPlane plane = MakeOverlayPlane(param, reusable_buffers);
if (!plane.buffer) {
returns[i] = OVERLAY_STATUS_NOT;
continue;
}
test_list.push_back(std::move(plane));
// We need to save the indices because we're skipping some planes.
plane_indices.push_back(i);
}
// Test the whole list, then gradually remove the last plane and retest until
// we have success, or no more planes to test.
while (!test_list.empty()) {
bool test_result = controller->TestPageFlip(test_list);
if (test_result) {
break;
}
// If test failed here, platform cannot support this configuration
// with current combination of layers. This is usually the case when this
// plane has requested post processing capability which needs additional
// hardware resources and they might be already in use by other planes.
// For example this plane has requested scaling capabilities and all
// available scalars are already in use by other planes.
// Drop the last plane from the test list and set it to OVERLAY_STATUS_NOT.
returns[plane_indices.back()] = OVERLAY_STATUS_NOT;
plane_indices.pop_back();
test_list.pop_back();
}
// Set OVERLAY_STATUS_ABLE for all planes left in the test_list.
for (size_t index : plane_indices) {
returns[index] = OVERLAY_STATUS_ABLE;
}
return returns;
}
} // namespace ui
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