As suggested in [0], add a note indicating that drm_atomic_helper_reset_crtc() can be a no-op in some cases.
[0]:https://lore.kernel.org/all/[email protected]/ Signed-off-by: Herve Codina <[email protected]> --- This patch applies on top of the following commit available in drm-misc ab83b7f6a0c1 ("drm/atomic-helper: Introduce drm_atomic_helper_reset_crtc()") drivers/gpu/drm/drm_atomic_helper.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index 0a636c398578..1f93b0a855de 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -3371,6 +3371,10 @@ EXPORT_SYMBOL(drm_atomic_helper_disable_all); * This implies a reset of all active components available between the CRTC and * connectors. * + * NOTE: This relies on resetting &drm_crtc_state.connectors_changed. + * For drivers which optimize out unnecessary modesets this will result in + * a no-op commit, achieving nothing. + * * Returns: * 0 on success or a negative error code on failure. */ -- 2.48.1
