On Wed, Jan 13, 2016 at 03:31:16PM +0100, Daniel Vetter wrote:
> This shouldn't be used by atomic drivers any more, it confuses the
> state tracking.
>
> Cc: Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx>
> Cc: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> Acked-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
Applied this one to drm-misc.
-Daniel
> ---
> drivers/gpu/drm/drm_crtc_helper.c | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c
> index a02a7f9a6a9d..a278fbbe23e0 100644
> --- a/drivers/gpu/drm/drm_crtc_helper.c
> +++ b/drivers/gpu/drm/drm_crtc_helper.c
> @@ -220,6 +220,15 @@ static void __drm_helper_disable_unused_functions(struct drm_device *dev)
> * disconnected connectors. Then it will disable all unused encoders and CRTCs
> * either by calling their disable callback if available or by calling their
> * dpms callback with DRM_MODE_DPMS_OFF.
> + *
> + * NOTE:
> + *
> + * This function is part of the legacy modeset helper library and will cause
> + * major confusion with atomic drivers. This is because atomic helpers guarantee
> + * to never call ->disable() hooks on a disabled function, or ->enable() hooks
> + * on an enabled functions. drm_helper_disable_unused_functions() on the other
> + * hand throws such guarantees into the wind and calls disable hooks
> + * unconditionally on unused functions.
> */
> void drm_helper_disable_unused_functions(struct drm_device *dev)
> {
> --
> 2.7.0.rc3
>
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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