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drm/nouveau/kms/nv50-: Assert we hold nv50_disp->lock in nv50_head_flush_*

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Now that we've had one bug that occurred in nouveau as the result of
nv50_head_flush_* being called without the appropriate locks, let's add
some lockdep asserts to make sure this doesn't happen in the future.

Reviewed-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Lyude Paul <lyude@redhat.com>
Link: https://patch.msgid.link/20251219215344.170852-3-lyude@redhat.com
This commit is contained in:
Lyude Paul 2025-12-19 16:52:03 -05:00
parent 9e9bc6be0f
commit 456c4f5ff0
1 changed files with 5 additions and 0 deletions
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5
drivers/gpu/drm/nouveau/dispnv50/head.c
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@ -43,6 +43,9 @@ nv50_head_flush_clr(struct nv50_head *head,
union nv50_head_atom_mask clr = {
.mask = asyh->clr.mask & ~(flush ? 0 : asyh->set.mask),
};
lockdep_assert_held(&head->disp->mutex);
if (clr.crc) nv50_crc_atomic_clr(head);
if (clr.olut) head->func->olut_clr(head);
if (clr.core) head->func->core_clr(head);
@ -65,6 +68,8 @@ nv50_head_flush_set_wndw(struct nv50_head *head, struct nv50_head_atom *asyh)
void
nv50_head_flush_set(struct nv50_head *head, struct nv50_head_atom *asyh)
{
lockdep_assert_held(&head->disp->mutex);
if (asyh->set.view ) head->func->view (head, asyh);
if (asyh->set.mode ) head->func->mode (head, asyh);
if (asyh->set.core ) head->func->core_set(head, asyh);