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backend/drm: don't destroy previous DRM master blobs

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On startup, we fetch the previous MODE_ID blob ID so that
compositors can keep using the previous mode if they want to.
However, that blob doesn't belong to us, it belongs to the
previous DRM master. As a result, we get an error when trying to
destroy it.

Fix this by tracking whether the blob belongs to us or not.

Closes: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/3811
This commit is contained in:
Simon Ser 2024-02-21 12:35:52 +01:00 • committed by Alexander Orzechowski
parent d8f4a3d78c
commit 0d9ffef774
4 changed files with 11 additions and 1 deletions
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include/backend/drm/drm.h
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@ -61,6 +61,7 @@ struct wlr_drm_crtc {
struct wl_list layers; // wlr_drm_layer.link
// Atomic modesetting only
bool own_mode_id;
uint32_t mode_id;
uint32_t gamma_lut;