commit ad563d42f18fd4f8f99f489fa1b15fd709450025
author Sean Paul <seanpaul@chromium.org> Wed Oct 28 15:56:23 2015 -0400
committer Sean Paul <seanpaul@chromium.org> Wed Oct 28 15:56:23 2015 -0400
tree c48045d7d801dcb1564a546f383da5a3791dec7e
parent 36d7c6e7ddb2e941f8611502ca938189290ff4b2

drm_hwcomposer: Use mode vrefresh if provided

Instead of always calculating the vrefresh from clock + resolution,
use vrefresh from the mode if its provided.

Bug: 25319209
Test: Tested on smaug, refresh reports 60Hz

Change-Id: I963ccb153d1856f5e45e4a1aa6fbd20b105d4a84
Signed-off-by: Sean Paul <seanpaul@chromium.org>

drmmode.cpp

diff --git a/drmmode.cpp b/drmmode.cpp
index 7f8c04d..2b558c9 100644
--- a/drmmode.cpp
+++ b/drmmode.cpp
@@ -36,6 +36,7 @@
       v_sync_end_(m->vsync_end),
       v_total_(m->vtotal),
       v_scan_(m->vscan),
+      v_refresh_(m->vrefresh),
       flags_(m->flags),
       type_(m->type),
       name_(m->name) {
@@ -54,6 +55,7 @@
       v_sync_end_(0),
       v_total_(0),
       v_scan_(0),
+      v_refresh_(0),
       flags_(0),
       type_(0),
       name_("") {
@@ -83,6 +85,7 @@
   m->vsync_end = v_sync_end_;
   m->vtotal = v_total_;
   m->vscan = v_scan_;
+  m->vrefresh = v_refresh_;
   m->flags = flags_;
   m->type = type_;
   strncpy(m->name, name_.c_str(), DRM_DISPLAY_MODE_LEN);
@@ -141,7 +144,8 @@
 }
 
 float DrmMode::v_refresh() const {
-  return clock_ / (float)(v_total_ * h_total_) * 1000.0f;
+  return v_refresh_ ? v_refresh_ * 1.0f :
+                      clock_ / (float)(v_total_ * h_total_) * 1000.0f;
 }
 
 uint32_t DrmMode::flags() const {