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libweston: intersect all backends' supported presentation clocks

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In preparation for multi-backend support, determine the presentation
clocks that are supported by all backends.

Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
This commit is contained in:
Philipp Zabel 2023-09-25 23:15:19 +02:00 committed by Derek Foreman
parent 183c309b85
commit 3d50069afc
1 changed files with 5 additions and 3 deletions
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8
libweston/compositor.c
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@ -9143,9 +9143,11 @@ weston_compositor_set_presentation_clock(struct weston_compositor *compositor,
WL_EXPORT int
weston_compositor_backends_loaded(struct weston_compositor *compositor)
{
struct weston_backend *backend =
wl_container_of(compositor->backend_list.next, backend, link);
uint32_t supported_clocks = backend->supported_presentation_clocks;
struct weston_backend *backend;
uint32_t supported_clocks = 0xffffffff;
wl_list_for_each(backend, &compositor->backend_list, link)
supported_clocks &= backend->supported_presentation_clocks;
if (weston_compositor_set_presentation_clock(compositor,
supported_clocks) < 0) {