kmstest: fix --sync mode

DRM sends page flips for each crtc in a commit. kmstest expected to get
a single flip event for a single commit, which caused --sync not to work
with two displays.

Fix this by making kmstest skip the first flip event.

diff --git a/utils/kmstest.cpp b/utils/kmstest.cpp
index f9486a4da4871320357f2711a996f1f2c05dbe0d..ba7d7906d7955d511a42838e00b612887168f91a 100644 (file)
--- a/utils/kmstest.cpp
+++ b/utils/kmstest.cpp
@@ -851,6 +851,13 @@ public:
 private:
        void handle_page_flip(uint32_t frame, double time)
        {
+               /*
+                * We get flip event for each crtc in this flipstate. We can commit the next frames
+                * only after we've gotten the flip event for all crtcs
+                */
+               if (++m_flip_count < m_outputs.size())
+                       return;
+
                m_frame_num++;
                if (s_max_flips && m_frame_num >= s_max_flips)
                        max_flips_reached = true;
@@ -942,6 +949,8 @@ private:
 
        void queue_next()
        {
+               m_flip_count = 0;
+
                if (m_card.has_atomic()) {
                        AtomicReq req(m_card);
 
@@ -961,6 +970,7 @@ private:
        string m_name;
        vector<const OutputInfo*> m_outputs;
        unsigned m_frame_num;
+       unsigned m_flip_count;
 
        chrono::steady_clock::time_point m_prev_print;
        chrono::steady_clock::time_point m_prev_frame;