[Ozone-Drm] More LOG cleanup

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

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // 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_util.h"
 
 #include <fcntl.h>
 #include <stdint.h>
 #include <stdlib.h>
 #include <sys/mman.h>
@@ skipping 111 matching lines @@
   if (*pixels == MAP_FAILED) {
     VPLOG(2) << "Cannot mmap dumb buffer";
     return false;
   }
 
   return true;
 }
 
 void ForceInitializationOfPrimaryDisplay(const scoped_refptr<DrmDevice>& drm,
                                          ScreenManager* screen_manager) {
-  LOG(WARNING) << "Forcing initialization of primary display.";
+  VLOG(2) << "Forcing initialization of primary display.";
   ScopedVector<HardwareDisplayControllerInfo> displays =
       GetAvailableDisplayControllerInfos(drm->get_fd());
 
   if (displays.empty())
     return;
 
   ScopedDrmPropertyPtr dpms(drm->GetProperty(displays[0]->connector(), "DPMS"));
 
   screen_manager->AddDisplayController(drm, displays[0]->crtc()->crtc_id,
                                        displays[0]->connector()->connector_id);
   if (screen_manager->ConfigureDisplayController(
           drm, displays[0]->crtc()->crtc_id,
           displays[0]->connector()->connector_id, gfx::Point(),
           displays[0]->connector()->modes[0])) {
     if (dpms)
       drm->SetProperty(displays[0]->connector()->connector_id, dpms->prop_id,
                        DRM_MODE_DPMS_ON);
   }
 }
 
 base::FilePath GetPrimaryDisplayCardPath() {
   struct drm_mode_card_res res;
   for (int i = 0; /* end on first card# that does not exist */; i++) {
     std::string card_path = base::StringPrintf(kDefaultGraphicsCardPattern, i);
 
     if (access(card_path.c_str(), F_OK) != 0)
       break;
 
     int fd = open(card_path.c_str(), O_RDWR | O_CLOEXEC);
-    if (fd < 0)
+    if (fd < 0) {
+      VPLOG(1) << "Failed to open '" << card_path << "'";
       continue;
+    }
 
     memset(&res, 0, sizeof(struct drm_mode_card_res));
     int ret = drmIoctl(fd, DRM_IOCTL_MODE_GETRESOURCES, &res);
     close(fd);
     if (ret == 0 && res.count_crtcs > 0) {
       return base::FilePath(card_path);
     }
+
+    VPLOG_IF(1, ret) << "Failed to get DRM resources for '" << card_path << "'";
   }
 
   return base::FilePath();
 }
 
 }  // namespace ui