backend: drop wlr_backend_get_presentation_clock()

We can just assume CLOCK_MONOTONIC everywhere.

Simplifies the backend API, and fixes clock mismatches when multiple
backends are used together with different clocks.

1 files changed, 0 insertions, 6 deletions

diff --git a/backend/drm/backend.c b/backend/drm/backend.c
index df02c6b3..4ee79773 100644
--- a/backend/drm/backend.c
+++ b/backend/drm/backend.c
@@ -64,11 +64,6 @@ static void backend_destroy(struct wlr_backend *backend) {
 	free(drm);
 }
 
-static clockid_t backend_get_presentation_clock(struct wlr_backend *backend) {
-	struct wlr_drm_backend *drm = get_drm_backend_from_backend(backend);
-	return drm->clock;
-}
-
 static int backend_get_drm_fd(struct wlr_backend *backend) {
 	struct wlr_drm_backend *drm = get_drm_backend_from_backend(backend);
 
@@ -86,7 +81,6 @@ static uint32_t drm_backend_get_buffer_caps(struct wlr_backend *backend) {
 static const struct wlr_backend_impl backend_impl = {
 	.start = backend_start,
 	.destroy = backend_destroy,
-	.get_presentation_clock = backend_get_presentation_clock,
 	.get_drm_fd = backend_get_drm_fd,
 	.get_buffer_caps = drm_backend_get_buffer_caps,
 };