drm: Allow drivers to indicate the damage helpers to ignore damage clips

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It allows drivers to set a struct drm_plane_state .ignore_damage_clips in
their plane's .atomic_check callback, as an indication to damage helpers
such as drm_atomic_helper_damage_iter_init() that the damage clips should
be ignored.

To be used by drivers that do per-buffer (e.g: virtio-gpu) uploads (rather
than per-plane uploads), since these type of drivers need to handle buffer
damages instead of frame damages.

That way, these drivers could force a full plane update if the framebuffer
attached to a plane's state has changed since the last update (page-flip).

Fixes: 01f05940a9 ("drm/virtio: Enable fb damage clips property for the primary plane")
Cc: <stable@vger.kernel.org> # v6.4+
Reported-by: nerdopolis <bluescreen_avenger@verizon.net>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218115
Suggested-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Zack Rusin <zackr@vmware.com>
Acked-by: Sima Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20231123221315.3579454-2-javierm@redhat.com

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Javier Martinez Canillas 2023-11-23 23:13:00 +01:00

parent 4653f9d014

commit 35ed38d582

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2

Documentation/gpu/drm-kms.rst

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3

drivers/gpu/drm/drm_damage_helper.c

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10

include/drm/drm_plane.h

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