drm_hwcomposer: CI: Bump-up clang toolchain to v15

Address new clang-tidy findings, in most cases 'misc-const-correctness'
check was addressed by adding 'const' modifier, or in some cases changed
to 'auto' (where it's better for formatting).

Signed-off-by: Roman Stratiienko <r.stratiienko@gmail.com>
diff --git a/drm/DrmAtomicStateManager.cpp b/drm/DrmAtomicStateManager.cpp
index 5d2eebd..3582b82 100644
--- a/drm/DrmAtomicStateManager.cpp
+++ b/drm/DrmAtomicStateManager.cpp
@@ -44,6 +44,7 @@
 
 // NOLINTNEXTLINE (readability-function-cognitive-complexity): Fixme
 auto DrmAtomicStateManager::CommitFrame(AtomicCommitArgs &args) -> int {
+  // NOLINTNEXTLINE(misc-const-correctness)
   ATRACE_CALL();
 
   if (args.active && *args.active == active_frame_state_.crtc_active_state) {
@@ -141,10 +142,11 @@
   }
 
   if (last_present_fence_) {
+    // NOLINTNEXTLINE(misc-const-correctness)
     ATRACE_NAME("WaitPriorFramePresented");
 
     constexpr int kTimeoutMs = 500;
-    int err = sync_wait(last_present_fence_.Get(), kTimeoutMs);
+    const int err = sync_wait(last_present_fence_.Get(), kTimeoutMs);
     if (err != 0) {
       ALOGE("sync_wait(fd=%i) returned: %i (errno: %i)",
             last_present_fence_.Get(), err, errno);
@@ -157,7 +159,7 @@
     flags |= DRM_MODE_ATOMIC_NONBLOCK;
   }
 
-  int err = drmModeAtomicCommit(drm->GetFd(), pset.get(), flags, drm);
+  auto err = drmModeAtomicCommit(drm->GetFd(), pset.get(), flags, drm);
 
   if (err != 0) {
     ALOGE("Failed to commit pset ret=%d\n", err);
@@ -223,9 +225,10 @@
     }
 
     {
+      // NOLINTNEXTLINE(misc-const-correctness)
       ATRACE_NAME("AsyncWaitForBuffersSwap");
       constexpr int kTimeoutMs = 500;
-      int err = sync_wait(present_fence.Get(), kTimeoutMs);
+      auto err = sync_wait(present_fence.Get(), kTimeoutMs);
       if (err != 0) {
         ALOGE("sync_wait(fd=%i) returned: %i (errno: %i)", present_fence.Get(),
               err, errno);
@@ -233,7 +236,7 @@
     }
 
     {
-      std::unique_lock lk(*mutex_);
+      const std::unique_lock lk(*mutex_);
       if (st_man_ == nullptr) {
         break;
       }
@@ -250,6 +253,7 @@
   assert(frames_staged_ - frames_tracked_ == 1);
   assert(last_present_fence_);
 
+  // NOLINTNEXTLINE(misc-const-correctness)
   ATRACE_NAME("CleanupPriorFrameResources");
   frames_tracked_++;
   active_frame_state_ = std::move(staged_frame_state_);
@@ -257,7 +261,7 @@
 }
 
 auto DrmAtomicStateManager::ExecuteAtomicCommit(AtomicCommitArgs &args) -> int {
-  int err = CommitFrame(args);
+  auto err = CommitFrame(args);
 
   if (!args.test_only) {
     if (err != 0) {
diff --git a/drm/DrmConnector.cpp b/drm/DrmConnector.cpp
index 4737316..69d029d 100644
--- a/drm/DrmConnector.cpp
+++ b/drm/DrmConnector.cpp
@@ -177,7 +177,7 @@
     }
 
     if (!exists) {
-      modes_.emplace_back(DrmMode(&connector_->modes[i]));
+      modes_.emplace_back(&connector_->modes[i]);
     }
   }
 
diff --git a/drm/DrmDevice.cpp b/drm/DrmDevice.cpp
index 0f73f1f..33adf2a 100644
--- a/drm/DrmDevice.cpp
+++ b/drm/DrmDevice.cpp
@@ -161,7 +161,7 @@
   // NOLINTNEXTLINE(cppcoreguidelines-pro-type-cstyle-cast)
   create_blob.data = (__u64)data;
 
-  int ret = drmIoctl(GetFd(), DRM_IOCTL_MODE_CREATEPROPBLOB, &create_blob);
+  auto ret = drmIoctl(GetFd(), DRM_IOCTL_MODE_CREATEPROPBLOB, &create_blob);
   if (ret != 0) {
     ALOGE("Failed to create mode property blob %d", ret);
     return {};
@@ -171,8 +171,8 @@
       new uint32_t(create_blob.blob_id), [this](const uint32_t *it) {
         struct drm_mode_destroy_blob destroy_blob {};
         destroy_blob.blob_id = (__u32)*it;
-        int err = drmIoctl(GetFd(), DRM_IOCTL_MODE_DESTROYPROPBLOB,
-                           &destroy_blob);
+        auto err = drmIoctl(GetFd(), DRM_IOCTL_MODE_DESTROYPROPBLOB,
+                            &destroy_blob);
         if (err != 0) {
           ALOGE("Failed to destroy mode property blob %" PRIu32 "/%d", *it,
                 err);
@@ -231,7 +231,7 @@
     return false;
   }
 
-  bool is_kms = res->count_crtcs > 0 && res->count_connectors > 0 &&
+  auto is_kms = res->count_crtcs > 0 && res->count_connectors > 0 &&
                 res->count_encoders > 0;
 
   return is_kms;
diff --git a/drm/DrmDisplayPipeline.cpp b/drm/DrmDisplayPipeline.cpp
index e81544d..7973529 100644
--- a/drm/DrmDisplayPipeline.cpp
+++ b/drm/DrmDisplayPipeline.cpp
@@ -171,9 +171,9 @@
   std::vector<std::shared_ptr<BindingOwner<DrmPlane>>> planes;
   planes.emplace_back(primary_plane);
 
-  static bool use_overlay_planes = ReadUseOverlayProperty();
+  const static bool kUseOverlayPlanes = ReadUseOverlayProperty();
 
-  if (use_overlay_planes) {
+  if (kUseOverlayPlanes) {
     for (const auto &plane : device->GetPlanes()) {
       if (plane->IsCrtcSupported(*crtc->Get())) {
         if (plane->GetType() == DRM_PLANE_TYPE_OVERLAY) {
diff --git a/drm/DrmFbImporter.cpp b/drm/DrmFbImporter.cpp
index 585b789..f0be32f 100644
--- a/drm/DrmFbImporter.cpp
+++ b/drm/DrmFbImporter.cpp
@@ -37,6 +37,7 @@
 auto DrmFbIdHandle::CreateInstance(BufferInfo *bo, GemHandle first_gem_handle,
                                    DrmDevice &drm)
     -> std::shared_ptr<DrmFbIdHandle> {
+  // NOLINTNEXTLINE(misc-const-correctness)
   ATRACE_NAME("Import dmabufs and register FB");
 
   // NOLINTNEXTLINE(cppcoreguidelines-owning-memory): priv. constructor usage
@@ -61,7 +62,7 @@
     }
   }
 
-  bool has_modifiers = bo->modifiers[0] != DRM_FORMAT_MOD_NONE &&
+  auto has_modifiers = bo->modifiers[0] != DRM_FORMAT_MOD_NONE &&
                        bo->modifiers[0] != DRM_FORMAT_MOD_INVALID;
 
   if (!drm.HasAddFb2ModifiersSupport() && has_modifiers) {
@@ -92,6 +93,7 @@
 }
 
 DrmFbIdHandle::~DrmFbIdHandle() {
+  // NOLINTNEXTLINE(misc-const-correctness)
   ATRACE_NAME("Close FB and dmabufs");
 
   /* Destroy framebuffer object */
@@ -116,7 +118,7 @@
       continue;
     }
     gem_close.handle = gem_handles_[i];
-    int32_t err = drmIoctl(drm_->GetFd(), DRM_IOCTL_GEM_CLOSE, &gem_close);
+    auto err = drmIoctl(drm_->GetFd(), DRM_IOCTL_GEM_CLOSE, &gem_close);
     if (err != 0) {
       ALOGE("Failed to close gem handle %d, errno: %d", gem_handles_[i], errno);
     }
@@ -127,8 +129,7 @@
     -> std::shared_ptr<DrmFbIdHandle> {
   /* Lookup DrmFbIdHandle in cache first. First handle serves as a cache key. */
   GemHandle first_handle = 0;
-  int32_t err = drmPrimeFDToHandle(drm_->GetFd(), bo->prime_fds[0],
-                                   &first_handle);
+  auto err = drmPrimeFDToHandle(drm_->GetFd(), bo->prime_fds[0], &first_handle);
 
   if (err != 0) {
     ALOGE("Failed to import prime fd %d ret=%d", bo->prime_fds[0], err);
diff --git a/drm/DrmPlane.cpp b/drm/DrmPlane.cpp
index 5051d35..76a2c6e 100644
--- a/drm/DrmPlane.cpp
+++ b/drm/DrmPlane.cpp
@@ -169,6 +169,11 @@
 }
 
 bool DrmPlane::IsValidForLayer(LayerData *layer) {
+  if (layer == nullptr || !layer->bi) {
+    ALOGE("%s: Invalid parameters", __func__);
+    return false;
+  }
+
   if (!rotation_property_) {
     if (layer->pi.transform != LayerTransform::kIdentity) {
       ALOGV("No rotation property on plane %d", GetId());
@@ -193,7 +198,7 @@
     return false;
   }
 
-  uint32_t format = layer->bi->format;
+  auto format = layer->bi->format;
   if (!IsFormatSupported(format)) {
     ALOGV("Plane %d does not supports %c%c%c%c format", GetId(), format,
           format >> 8, format >> 16, format >> 24);
@@ -241,8 +246,8 @@
 
 auto DrmPlane::AtomicSetState(drmModeAtomicReq &pset, LayerData &layer,
                               uint32_t zpos, uint32_t crtc_id) -> int {
-  if (!layer.fb) {
-    ALOGE("Expected a valid framebuffer for pset");
+  if (!layer.fb || !layer.bi) {
+    ALOGE("%s: Invalid arguments", __func__);
     return -EINVAL;
   }
 
@@ -317,8 +322,8 @@
 
 auto DrmPlane::GetPlaneProperty(const char *prop_name, DrmProperty &property,
                                 Presence presence) -> bool {
-  int err = drm_->GetProperty(GetId(), DRM_MODE_OBJECT_PLANE, prop_name,
-                              &property);
+  auto err = drm_->GetProperty(GetId(), DRM_MODE_OBJECT_PLANE, prop_name,
+                               &property);
   if (err != 0) {
     if (presence == Presence::kMandatory) {
       ALOGE("Could not get mandatory property \"%s\" from plane %d", prop_name,
diff --git a/drm/DrmProperty.cpp b/drm/DrmProperty.cpp
index 32f1c62..e0bf25e 100644
--- a/drm/DrmProperty.cpp
+++ b/drm/DrmProperty.cpp
@@ -50,7 +50,7 @@
     values_.emplace_back(p->values[i]);
 
   for (int i = 0; i < p->count_enums; ++i)
-    enums_.emplace_back(DrmPropertyEnum(&p->enums[i]));
+    enums_.emplace_back(&p->enums[i]);
 
   for (int i = 0; i < p->count_blobs; ++i)
     blob_ids_.emplace_back(p->blob_ids[i]);
diff --git a/drm/ResourceManager.cpp b/drm/ResourceManager.cpp
index dbf0993..fb5c32b 100644
--- a/drm/ResourceManager.cpp
+++ b/drm/ResourceManager.cpp
@@ -54,8 +54,8 @@
   char path_pattern[PROPERTY_VALUE_MAX];
   // Could be a valid path or it can have at the end of it the wildcard %
   // which means that it will try open all devices until an error is met.
-  int path_len = property_get("vendor.hwc.drm.device", path_pattern,
-                              "/dev/dri/card%");
+  auto path_len = property_get("vendor.hwc.drm.device", path_pattern,
+                               "/dev/dri/card%");
   if (path_pattern[path_len - 1] != '%') {
     auto dev = DrmDevice::CreateInstance(path_pattern, this);
     if (dev) {
@@ -123,8 +123,8 @@
 
   for (auto *conn : ordered_connectors) {
     conn->UpdateModes();
-    bool connected = conn->IsConnected();
-    bool attached = attached_pipelines_.count(conn) != 0;
+    auto connected = conn->IsConnected();
+    auto attached = attached_pipelines_.count(conn) != 0;
 
     if (connected != attached) {
       ALOGI("%s connector %s", connected ? "Attaching" : "Detaching",
diff --git a/drm/UEventListener.cpp b/drm/UEventListener.cpp
index b56b8e1..79f23c4 100644
--- a/drm/UEventListener.cpp
+++ b/drm/UEventListener.cpp
@@ -47,8 +47,8 @@
     if (!hotplug_handler_ || !uevent_str)
       continue;
 
-    bool drm_event = uevent_str->find("DEVTYPE=drm_minor") != std::string::npos;
-    bool hotplug_event = uevent_str->find("HOTPLUG=1") != std::string::npos;
+    auto drm_event = uevent_str->find("DEVTYPE=drm_minor") != std::string::npos;
+    auto hotplug_event = uevent_str->find("HOTPLUG=1") != std::string::npos;
 
     if (drm_event && hotplug_event) {
       constexpr useconds_t kDelayAfterUeventUs = 200000;
diff --git a/drm/VSyncWorker.cpp b/drm/VSyncWorker.cpp
index ed41189..7b4fae4 100644
--- a/drm/VSyncWorker.cpp
+++ b/drm/VSyncWorker.cpp
@@ -84,10 +84,10 @@
     refresh = pipe_->connector->Get()->GetActiveMode().v_refresh();
   }
 
-  int64_t phased_timestamp = GetPhasedVSync(kOneSecondNs /
-                                                static_cast<int>(refresh),
-                                            vsync.tv_sec * kOneSecondNs +
-                                                vsync.tv_nsec);
+  auto phased_timestamp = GetPhasedVSync(kOneSecondNs /
+                                             static_cast<int>(refresh),
+                                         vsync.tv_sec * kOneSecondNs +
+                                             vsync.tv_nsec);
   vsync.tv_sec = phased_timestamp / kOneSecondNs;
   vsync.tv_nsec = int(phased_timestamp - (vsync.tv_sec * kOneSecondNs));
   do {
@@ -120,8 +120,8 @@
   drmVBlank vblank{};
 
   if (pipe != nullptr) {
-    uint32_t high_crtc = (pipe->crtc->Get()->GetIndexInResArray()
-                          << DRM_VBLANK_HIGH_CRTC_SHIFT);
+    auto high_crtc = (pipe->crtc->Get()->GetIndexInResArray()
+                      << DRM_VBLANK_HIGH_CRTC_SHIFT);
 
     vblank.request.type = (drmVBlankSeqType)(DRM_VBLANK_RELATIVE |
                                              (high_crtc &