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From 8d6e41fc9b5194fb24523c939de54a2af46b5d07 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Jonas=20=C3=85dahl?= <jadahl@gmail.com>
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Date: Fri, 27 May 2022 18:19:27 +0200
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Subject: [PATCH] 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
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support atomic mode setting, and the way it worked will break night
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light and other gamma related features. This makes things use the gamma
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length; if it is higher than 0, it definitely supports it one way or the
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other, i.e. GAMMA_LUT with the atomic backend, and drmModeCrtcSetGamma()
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with the legacy/simple backend.
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Fixes: 364572b95c8354ac66674064a8058aa98bc0bbef
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Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/2287
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(cherry picked from commit a2ebd10f049d888e451938e23a035ed97e0c8eff)
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Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2452>
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---
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src/backends/native/meta-kms-crtc.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/src/backends/native/meta-kms-crtc.c b/src/backends/native/meta-kms-crtc.c
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index 24f5a2d7400..0513af947c9 100644
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--- a/src/backends/native/meta-kms-crtc.c
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+++ b/src/backends/native/meta-kms-crtc.c
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@@ -96,7 +96,7 @@ meta_kms_crtc_is_active (MetaKmsCrtc *crtc)
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gboolean
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meta_kms_crtc_has_gamma (MetaKmsCrtc *crtc)
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{
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- return !!meta_kms_crtc_get_prop_id (crtc, META_KMS_CRTC_PROP_GAMMA_LUT);
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+ return crtc->current_state.gamma.size > 0;
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}
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static void
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--
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2.36.1
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