diff options
Diffstat (limited to 'backend/drm/drm.c')
| -rw-r--r-- | backend/drm/drm.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/backend/drm/drm.c b/backend/drm/drm.c index 18e9a64e..0f118c17 100644 --- a/backend/drm/drm.c +++ b/backend/drm/drm.c @@ -106,6 +106,10 @@ bool check_drm_features(struct wlr_drm_backend *drm) { drm->iface = &atomic_iface; } + if (drm->iface == &legacy_iface) { + drm->supports_tearing_page_flips = drmGetCap(drm->fd, DRM_CAP_ASYNC_PAGE_FLIP, &cap) == 0 && cap == 1; + } + int ret = drmGetCap(drm->fd, DRM_CAP_TIMESTAMP_MONOTONIC, &cap); drm->clock = (ret == 0 && cap == 1) ? CLOCK_MONOTONIC : CLOCK_REALTIME; @@ -650,6 +654,11 @@ static bool drm_connector_test(struct wlr_output *output, if (!drm_connector_state_update_primary_fb(conn, &pending)) { goto out; } + + if (pending.base->tearing_page_flip && !conn->backend->supports_tearing_page_flips) { + wlr_log(WLR_ERROR, "Attempted to submit a tearing page flip to an unsupported backend!"); + goto out; + } } if (state->committed & WLR_OUTPUT_STATE_LAYERS) { if (!drm_connector_set_pending_layer_fbs(conn, pending.base)) { @@ -725,7 +734,7 @@ bool drm_connector_commit_state(struct wlr_drm_connector *conn, // page-flip, either a blocking modeset. When performing a blocking modeset // we'll wait for all queued page-flips to complete, so we don't need this // safeguard. - if (conn->pending_page_flip_crtc && !pending.modeset) { + if (conn->pending_page_flip_crtc && !pending.modeset && !pending.base->tearing_page_flip) { wlr_drm_conn_log(conn, WLR_ERROR, "Failed to page-flip output: " "a page-flip is already pending"); goto out; @@ -748,6 +757,9 @@ bool drm_connector_commit_state(struct wlr_drm_connector *conn, } uint32_t flags = pending.active ? DRM_MODE_PAGE_FLIP_EVENT : 0; + if (pending.base->tearing_page_flip) { + flags |= DRM_MODE_PAGE_FLIP_ASYNC; + } ok = drm_crtc_commit(conn, &pending, flags, false); if (!ok) { |