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backend/drm: require buffer on modeset in drm_connector_test

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When testing a modeset, make sure the caller has also provided a
buffer. This allows df0e75ba05 ("output: try skipping buffer
allocation if the backend allows it") to work as expected with the
DRM backend.

Closes: https://github.com/swaywm/wlroots/issues/3086
This commit is contained in:
Simon Ser 2021-08-04 22:42:36 +02:00 committed by Kenny Levinsen
parent df0e75ba05
commit 1936e136df
1 changed files with 8 additions and 0 deletions
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8
backend/drm/drm.c
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@ -458,6 +458,14 @@ static bool drm_connector_test(struct wlr_output *output) {
}
if (drm_connector_state_active(conn, &output->pending)) {
if ((output->pending.committed &
(WLR_OUTPUT_STATE_ENABLED | WLR_OUTPUT_STATE_MODE)) &&
!(output->pending.committed & WLR_OUTPUT_STATE_BUFFER)) {
wlr_drm_conn_log(conn, WLR_DEBUG,
"Can't enable an output without a buffer");
return false;
}
if (!drm_connector_alloc_crtc(conn)) {
wlr_drm_conn_log(conn, WLR_DEBUG,
"No CRTC available for this connector");