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The tidss_crtc_reset() function will (rightfully) destroy any pre-existing state. However, the tidss CRTC driver has its own CRTC state structure that subclasses drm_crtc_state, and yet will destroy the previous state by calling __drm_atomic_helper_crtc_destroy_state() and kfree() on its drm_crtc_state pointer. It works only because the drm_crtc_state is the first field in the structure, and thus its offset is 0. It's incredibly fragile however, so let's call our destroy implementation in such a case to deal with it properly. Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de> Link: https://lore.kernel.org/r/20250902-drm-state-readout-v1-22-14ad5315da3f@kernel.org Signed-off-by: Maxime Ripard <mripard@kernel.org> Link: https://lore.kernel.org/r/20250902-drm-state-readout-v1-22-14ad5315da3f@kernel.org