backend/drm: refuse to enable an output without a mode
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@ -422,6 +422,15 @@ static bool test_buffer(struct wlr_drm_connector *conn,
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static bool drm_connector_test(struct wlr_output *output) {
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struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
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if ((output->pending.committed & WLR_OUTPUT_STATE_ENABLED) &&
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output->pending.enabled) {
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if (output->current_mode == NULL &&
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!(output->pending.committed & WLR_OUTPUT_STATE_MODE)) {
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wlr_log(WLR_DEBUG, "Can't enable an output without a mode");
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return false;
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}
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}
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if ((output->pending.committed & WLR_OUTPUT_STATE_BUFFER) &&
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output->pending.buffer_type == WLR_OUTPUT_STATE_BUFFER_SCANOUT) {
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if (!test_buffer(conn, output->pending.buffer)) {
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