drm/panel: Add refcount support

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Allocate panel via reference counting. Add _get() and _put() helper
functions to ensure panel allocations are refcounted. Avoid use after
free by ensuring panel pointer is valid and can be usable till the last
reference is put.

Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Reviewed-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: Anusha Srivatsa <asrivats@redhat.com>
Link: https://lore.kernel.org/r/20250331-b4-panel-refcounting-v4-2-dad50c60c6c9@redhat.com
Signed-off-by: Maxime Ripard <mripard@kernel.org>

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Anusha Srivatsa 2025-03-31 11:15:26 -04:00 • committed by Maxime Ripard

parent ed9c594d49

commit dcba396f69

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2 changed files with 82 additions and 1 deletions

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64

drivers/gpu/drm/drm_panel.c

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19

include/drm/drm_panel.h

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