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| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-01-13 17:31:16 +0300 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-01-25 21:35:06 +0300 |
| commit | 09859d2a3c2090ae2452cbf1c8fdde30ba38d934 (patch) | |
| tree | d54c56ec2cda8088d8a2eede8ee51641dd280fde /drivers/gpu | |
| parent | 941a77b078e6127c4d441439ad1669347750288e (diff) | |
| download | linux-09859d2a3c2090ae2452cbf1c8fdde30ba38d934.tar.xz | |
drm/crtc-helper: Add caveat to disable_unused_functions doc
This shouldn't be used by atomic drivers any more, it confuses the
state tracking.
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1452695476-31147-1-git-send-email-daniel.vetter@ffwll.ch
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/drm_crtc_helper.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c index 5d4bc6441d88..9f8b894f4480 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) { |