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authorSebastian Wick <sebastian.wick@redhat.com>2024-04-10 14:20:06 +0200
committerMaxime Ripard <mripard@kernel.org>2024-04-15 09:10:50 +0200
commitf99885b15b2d230d2d1d75e5e542ecaacd29733f (patch)
tree80e2c5a6a81d52033a3161e9ca61ca5b7f3d8a73 /Documentation/gpu
parentb27a838f923ad29f03d968c3b8ae6303c3a509b7 (diff)
drm: Document requirements for driver-specific KMS props in new drivers
When extending support for a driver-specific KMS property to additional drivers, we should apply all the requirements for new properties and make sure the semantics are the same and documented. v2: devs of the driver which introduced property shall help and ack Signed-off-by: Sebastian Wick <sebastian.wick@redhat.com> Acked-by: Maxime Ripard <mripard@kernel.org> Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Maxime Ripard <mripard@kernel.org> Link: https://patchwork.freedesktop.org/patch/msgid/20240410122008.38207-1-sebastian.wick@redhat.com
Diffstat (limited to 'Documentation/gpu')
-rw-r--r--Documentation/gpu/drm-kms.rst7
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/gpu/drm-kms.rst b/Documentation/gpu/drm-kms.rst
index 13d3627d8bc0..b98b98359c90 100644
--- a/Documentation/gpu/drm-kms.rst
+++ b/Documentation/gpu/drm-kms.rst
@@ -496,6 +496,13 @@ addition to the one mentioned above:
* An IGT test must be submitted where reasonable.
+For historical reasons, non-standard, driver-specific properties exist. If a KMS
+driver wants to add support for one of those properties, the requirements for
+new properties apply where possible. Additionally, the documented behavior must
+match the de facto semantics of the existing property to ensure compatibility.
+Developers of the driver that first added the property should help with those
+tasks and must ACK the documented behavior if possible.
+
Property Types and Blob Property Support
----------------------------------------