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kms/crtc: Determine gamma support given the gamma length

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The property doesn't necessarily exist when using drivers that doesn't
support atomic mode setting, and the way it worked will break night
light and other gamma related features. This makes things use the gamma
length; if it is higher than 0, it definitely supports it one way or the
other, i.e. GAMMA_LUT with the atomic backend, and drmModeCrtcSetGamma()
with the legacy/simple backend.

Fixes: 364572b95c
Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/2287
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2435>
This commit is contained in:
Jonas Ådahl 2022-05-27 18:19:27 +02:00 committed by Marge Bot
parent 9001fa9717
commit a2ebd10f04
1 changed files with 1 additions and 1 deletions
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src/backends/native/meta-kms-crtc.c
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@ -96,7 +96,7 @@ meta_kms_crtc_is_active (MetaKmsCrtc *crtc)
gboolean
meta_kms_crtc_has_gamma (MetaKmsCrtc *crtc)
{
return !!meta_kms_crtc_get_prop_id (crtc, META_KMS_CRTC_PROP_GAMMA_LUT);
return crtc->current_state.gamma.size > 0;
}
static void