drm_hwcomposer: Create mode blob on modeset queue

Instead of creating the mode blob right before doing the modeset,
create it as soon as the modeset is queued. This will allow us to
use the blob for both atomic test as well as commit.

In addition to keeping the blob around, store the blob's id while
the mode is active so we don't need to look it up when/if the next
modeset comes in.

Bug: 25379136
Test: Tested on smaug

Change-Id: I60e6f83310ea0601388bb31b63d25c6fd7b8fc4d
Signed-off-by: Sean Paul <seanpaul@chromium.org>

1 files changed, 42 insertions, 44 deletions

diff --git a/drmdisplaycompositor.cpp b/drmdisplaycompositor.cpp
index 773b696..bcd1a14 100644
--- a/drmdisplaycompositor.cpp
+++ b/drmdisplaycompositor.cpp
@@ -241,7 +241,6 @@ DrmDisplayCompositor::DrmDisplayCompositor()
       frame_worker_(this),
       initialized_(false),
       active_(false),
-      needs_modeset_(false),
       framebuffer_index_(0),
       squash_framebuffer_index_(0),
       dump_frames_composited_(0),
@@ -263,6 +262,11 @@ DrmDisplayCompositor::~DrmDisplayCompositor() {
   if (ret)
     ALOGE("Failed to acquire compositor lock %d", ret);
 
+  if (mode_.blob_id)
+    drm_->DestroyPropertyBlob(mode_.blob_id);
+  if (mode_.old_blob_id)
+    drm_->DestroyPropertyBlob(mode_.old_blob_id);
+
   while (!composite_queue_.empty()) {
     composite_queue_.front().reset();
     composite_queue_.pop();
@@ -619,44 +623,14 @@ int DrmDisplayCompositor::CommitFrame(DrmDisplayComposition *display_comp) {
     return -ENOMEM;
   }
 
-  uint32_t blob_id = 0;
-  uint64_t old_blob_id;
-  if (needs_modeset_) {
-    DrmProperty old_mode;
-    ret = drm_->GetCrtcProperty(*crtc, crtc->mode_property().name().c_str(),
-                                &old_mode);
-    if (ret) {
-      ALOGE("Failed to get old mode property from crtc %d", crtc->id());
-      drmModePropertySetFree(pset);
-      return ret;
-    }
-    ret = old_mode.value(&old_blob_id);
-    if (ret) {
-      ALOGE("Could not get old blob id value %d", ret);
-      drmModePropertySetFree(pset);
-      return ret;
-    }
-
-    struct drm_mode_modeinfo drm_mode;
-    memset(&drm_mode, 0, sizeof(drm_mode));
-    next_mode_.ToDrmModeModeInfo(&drm_mode);
-
-    ret = drm_->CreatePropertyBlob(&drm_mode, sizeof(struct drm_mode_modeinfo),
-                                   &blob_id);
-    if (ret) {
-      ALOGE("Failed to create mode property blob %d", ret);
-      drmModePropertySetFree(pset);
-      return ret;
-    }
-
+  if (mode_.needs_modeset) {
     ret = drmModePropertySetAdd(pset, crtc->id(), crtc->mode_property().id(),
-                                blob_id) ||
+                                mode_.blob_id) ||
           drmModePropertySetAdd(pset, connector->id(),
                                 connector->crtc_id_property().id(), crtc->id());
     if (ret) {
-      ALOGE("Failed to add blob %d to pset", blob_id);
+      ALOGE("Failed to add blob %d to pset", mode_.blob_id);
       drmModePropertySetFree(pset);
-      drm_->DestroyPropertyBlob(blob_id);
       return ret;
     }
   }
@@ -819,19 +793,17 @@ out:
     if (ret) {
       ALOGE("Failed to commit pset ret=%d\n", ret);
       drmModePropertySetFree(pset);
-      if (needs_modeset_)
-        drm_->DestroyPropertyBlob(blob_id);
       return ret;
     }
   }
   if (pset)
     drmModePropertySetFree(pset);
 
-  if (needs_modeset_) {
-    ret = drm_->DestroyPropertyBlob(old_blob_id);
+  if (mode_.needs_modeset) {
+    ret = drm_->DestroyPropertyBlob(mode_.old_blob_id);
     if (ret) {
-      ALOGE("Failed to destroy old mode property blob %lld/%d", old_blob_id,
-            ret);
+      ALOGE("Failed to destroy old mode property blob %lld/%d",
+            mode_.old_blob_id, ret);
       return ret;
     }
 
@@ -842,8 +814,10 @@ out:
       return ret;
     }
 
-    connector->set_active_mode(next_mode_);
-    needs_modeset_ = false;
+    connector->set_active_mode(mode_.mode);
+    mode_.old_blob_id = mode_.blob_id;
+    mode_.blob_id = 0;
+    mode_.needs_modeset = false;
   }
 
   return ret;
@@ -866,6 +840,23 @@ int DrmDisplayCompositor::ApplyDpms(DrmDisplayComposition *display_comp) {
   return 0;
 }
 
+std::tuple<int, uint32_t> DrmDisplayCompositor::CreateModeBlob(
+    const DrmMode &mode) {
+  struct drm_mode_modeinfo drm_mode;
+  memset(&drm_mode, 0, sizeof(drm_mode));
+  mode.ToDrmModeModeInfo(&drm_mode);
+
+  uint32_t id = 0;
+  int ret = drm_->CreatePropertyBlob(&drm_mode,
+                                     sizeof(struct drm_mode_modeinfo), &id);
+  if (ret) {
+    ALOGE("Failed to create mode property blob %d", ret);
+    return std::make_tuple(ret, 0);
+  }
+  ALOGE("Create blob_id %ld\n", id);
+  return std::make_tuple(ret, id);
+}
+
 void DrmDisplayCompositor::ApplyFrame(
     std::unique_ptr<DrmDisplayComposition> composition, int status) {
   int ret = status;
@@ -944,8 +935,15 @@ int DrmDisplayCompositor::Composite() {
         ALOGE("Failed to apply dpms for display %d", display_);
       return ret;
     case DRM_COMPOSITION_TYPE_MODESET:
-      next_mode_ = composition->display_mode();
-      needs_modeset_ = true;
+      mode_.mode = composition->display_mode();
+      if (mode_.blob_id)
+        drm_->DestroyPropertyBlob(mode_.blob_id);
+      std::tie(ret, mode_.blob_id) = CreateModeBlob(mode_.mode);
+      if (ret) {
+        ALOGE("Failed to create mode blob for display %d", display_);
+        return ret;
+      }
+      mode_.needs_modeset = true;
       return 0;
     default:
       ALOGE("Unknown composition type %d", composition->type());