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/*
* Copyright © Canonical Ltd.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 or 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "src/platforms/common/server/kms-utils/threaded_drm_event_handler.h"
#include "mir/test/doubles/mock_drm.h"
#include <mutex>
#include <deque>
#include <gtest/gtest.h>
#include <gmock/gmock.h>
namespace mgk = mir::graphics::kms;
namespace mtd = mir::test::doubles;
using namespace testing;
class ThreadedDRMEventHandlerTest : public testing::Test
{
private:
struct EventDetails
{
unsigned int frame_no = {};
unsigned int tv_sec = {};
unsigned int tv_usec = {};
uint32_t crtc_id = {};
void const* userdata = {};
};
public:
ThreadedDRMEventHandlerTest()
: mock_drm_fd{mock_drm.open(device_node, 0)}
{
ON_CALL(mock_drm, drmHandleEvent(static_cast<int>(mock_drm_fd), _))
.WillByDefault(
Invoke(
[this](auto drm_fd, drmEventContextPtr ctx) -> int
{
EXPECT_THAT(ctx->version, Ge(3));
EXPECT_THAT(ctx->page_flip_handler2, NotNull());
if (!ctx->page_flip_handler2)
return -1;
EventDetails event;
{
std::lock_guard lock{event_mutex};
if (expected_events.empty())
{
ADD_FAILURE() << "drmHandleEvent called with no pending event";
return -1;
}
event = expected_events.front();
expected_events.pop_front();
}
ctx->page_flip_handler2(
drm_fd,
event.frame_no,
event.tv_sec,
event.tv_usec,
event.crtc_id,
const_cast<void*>(event.userdata));
mock_drm.consume_event_on(device_node);
return 0;
}));
}
void add_flip_event(
unsigned int frame_no,
unsigned int tv_sec,
unsigned int tv_usec,
uint32_t crtc_id,
void const* userdata)
{
using namespace std::literals::chrono_literals;
std::lock_guard lock{event_mutex};
expected_events.emplace_back(
EventDetails
{
frame_no,
tv_sec,
tv_usec,
crtc_id,
userdata
});
mock_drm.generate_event_on(device_node);
}
::testing::NiceMock<mtd::MockDRM> mock_drm;
char const* const device_node = "/dev/dri/card0";
mir::Fd mock_drm_fd;
private:
std::mutex event_mutex;
std::deque<EventDetails> expected_events;
};
TEST_F(ThreadedDRMEventHandlerTest, flip_completion_handle_becomes_ready_on_flip)
{
using namespace std::literals::chrono_literals;
mgk::ThreadedDRMEventHandler handler{mock_drm_fd};
mgk::ThreadedDRMEventHandler::KMSCrtcId const crtc_id{55};
auto completion_handle = handler.expect_flip_event(crtc_id, [](auto, auto){});
ASSERT_TRUE(completion_handle.valid());
EXPECT_THAT(completion_handle.wait_for(0ms), Not(Eq(std::future_status::ready)));
add_flip_event(0, 0, 0, crtc_id, handler.drm_event_data());
EXPECT_THAT(completion_handle.wait_for(30s), Eq(std::future_status::ready));
}
TEST_F(ThreadedDRMEventHandlerTest, calls_frame_callback_on_flip_completion)
{
using namespace std::literals::chrono_literals;
mgk::ThreadedDRMEventHandler handler{mock_drm_fd};
mgk::ThreadedDRMEventHandler::KMSCrtcId const crtc_id{55};
int constexpr frame_sec{10};
int constexpr frame_usec{400};
unsigned int constexpr expected_frame_no{3441};
auto completion_handle = handler.expect_flip_event(
crtc_id,
[frame_sec, frame_usec](unsigned int frame_no, std::chrono::milliseconds frame_time)
{
EXPECT_THAT(frame_no, Eq(expected_frame_no));
EXPECT_THAT(frame_time, Eq(std::chrono::seconds{frame_sec} + std::chrono::milliseconds{frame_usec}));
});
add_flip_event(expected_frame_no, frame_sec, frame_usec, crtc_id, handler.drm_event_data());
EXPECT_THAT(completion_handle.wait_for(30s), Eq(std::future_status::ready));
}
TEST_F(ThreadedDRMEventHandlerTest, handles_spurious_drm_events)
{
using namespace std::literals::chrono_literals;
mgk::ThreadedDRMEventHandler handler{mock_drm_fd};
mgk::ThreadedDRMEventHandler::KMSCrtcId const crtc_id{55};
int constexpr frame_sec{10};
int constexpr frame_usec{400};
unsigned int constexpr expected_frame_no{3441};
auto completion_handle = handler.expect_flip_event(
crtc_id,
[frame_sec, frame_usec](unsigned int frame_no, std::chrono::milliseconds frame_time)
{
EXPECT_THAT(frame_no, Eq(expected_frame_no));
EXPECT_THAT(frame_time, Eq(std::chrono::seconds{frame_sec} + std::chrono::milliseconds{frame_usec}));
});
add_flip_event(23, 10, 10, 5, handler.drm_event_data());
add_flip_event(33, 20, 0, 10, handler.drm_event_data());
add_flip_event(expected_frame_no, frame_sec, frame_usec, crtc_id, handler.drm_event_data());
EXPECT_THAT(completion_handle.wait_for(30s), Eq(std::future_status::ready));
}
TEST_F(ThreadedDRMEventHandlerTest, dispatches_event_for_correct_crtc)
{
using namespace std::literals::chrono_literals;
mgk::ThreadedDRMEventHandler handler{mock_drm_fd};
mgk::ThreadedDRMEventHandler::KMSCrtcId const crtc_one{55};
mgk::ThreadedDRMEventHandler::KMSCrtcId const crtc_two{44};
std::atomic<bool> first_flip_done{false};
std::atomic<bool> second_flip_done{false};
auto first_handle = handler.expect_flip_event(
crtc_one,
[&first_flip_done](auto, auto){ first_flip_done = true; });
auto second_handle = handler.expect_flip_event(
crtc_two,
[&second_flip_done](auto, auto){ second_flip_done = true; });
add_flip_event(0, 0, 0, crtc_two, handler.drm_event_data());
EXPECT_THAT(second_handle.wait_for(30s), Eq(std::future_status::ready));
EXPECT_TRUE(second_flip_done);
EXPECT_FALSE(first_flip_done);
add_flip_event(0, 0, 0, crtc_one, handler.drm_event_data());
EXPECT_THAT(first_handle.wait_for(30s), Eq(std::future_status::ready));
EXPECT_TRUE(first_flip_done);
}
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