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present: fix msc offset calculation in window mode

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Instead of getting the current msc value from the window, which might be
different to old one directly take the last saved msc value saved in
the window_priv struct.

Signed-off-by: Roman Gilg <subdiff@gmail.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
This commit is contained in:
Roman Gilg
2018-04-20 17:10:06 +02:00
committed by Adam Jackson
parent d7297b0044
commit 22285a6f1c
1 changed files with 1 additions and 6 deletions
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7
present/present_wnmd.c
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@@ -518,8 +518,6 @@ present_wnmd_window_to_crtc_msc(WindowPtr window, RRCrtcPtr crtc, uint64_t windo
present_window_priv_ptr window_priv = present_get_window_priv(window, TRUE);
if (crtc != window_priv->crtc) {
uint64_t old_ust, old_msc;
if (window_priv->crtc == PresentCrtcNeverSet) {
window_priv->msc_offset = 0;
} else {
@@ -527,10 +525,7 @@ present_wnmd_window_to_crtc_msc(WindowPtr window, RRCrtcPtr crtc, uint64_t windo
* we'll just use whatever previous MSC we'd seen from this CRTC
*/
if (present_wnmd_get_ust_msc(window->drawable.pScreen, window, &old_ust, &old_msc) != Success)
old_msc = window_priv->msc;
window_priv->msc_offset += new_msc - old_msc;
window_priv->msc_offset += new_msc - window_priv->msc;
}
window_priv->crtc = crtc;
}