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// Copyright 2022 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/test/integration_test_helpers.h"
#include <fcntl.h>
#include <unistd.h>
#include <string>
#include <utility>
#include "base/files/file_path.h"
#include "base/logging.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "third_party/libdrm/src/xf86drm.h"
#include "ui/ozone/platform/drm/common/scoped_drm_types.h"
namespace ui::test {
PathAndFd FindDrmDriverOrDie(std::string name) {
constexpr char kDefaultGraphicsCardPattern[] = "/dev/dri/card%d";
std::vector<std::string> seen_drivers;
// Loop over all cards until we find a VKMS driver, or die when we run out of
// things to look at. Drivers may be in any order.
for (int i = 0;; i++) {
std::string card_path = base::StringPrintf(kDefaultGraphicsCardPattern, i);
if (access(card_path.c_str(), F_OK) != 0)
LOG(FATAL) << "Unable to find a suitable " << name
<< " driver. Saw: " << base::JoinString(seen_drivers, ", ");
base::ScopedFD fd(open(card_path.c_str(), O_RDWR | O_CLOEXEC));
if (!fd.is_valid())
continue;
ui::ScopedDrmVersionPtr version(drmGetVersion(fd.get()));
auto driver_name = std::string(version->name, version->name_len);
if (driver_name != name) {
seen_drivers.push_back(driver_name);
continue;
}
return {base::FilePath(card_path), std::move(fd)};
}
}
} // namespace ui::test
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