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drm/nouveau/kms: Only allow enabling atomic modesetting on nv50+

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Atomic modesetting support was never added for pre-nv50 chipsets, so make
sure we don't allow it to be forced on. Additionally, print a small warning
when it's not supported.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Link: https://patch.msgid.link/20260813204803.2097176-5-lyude@redhat.com
This commit is contained in:
Lyude Paul 2026-08-13 16:46:50 -04:00
parent 830b2e55df
commit 69facd615b
1 changed files with 10 additions and 3 deletions
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13
drivers/gpu/drm/nouveau/nouveau_drm.c
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@ -739,10 +739,17 @@ nouveau_drm_device_new(struct device *parent, struct nvkm_device *device)
struct nouveau_drm *drm;
int ret;
if (nouveau_atomic)
driver = &driver_atomic_kms;
else
if (device->card_type >= NV_50) {
if (nouveau_atomic)
driver = &driver_atomic_kms;
else
driver = &driver_legacy_kms;
} else {
if (nouveau_atomic)
dev_warn(parent, "Atomic modesetting not supported (needs nv50+)\n");
driver = &driver_legacy_kms;
}
drm = kzalloc_obj(*drm);
if (!drm)