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drm: drm_plane_force_disable is not for atomic drivers 

This way I can explain why it'll be fine to pass a NULL acquire ctx
here in the next patch.

Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170322215058.8671-4-daniel.vetter@ffwll.ch
This commit is contained in:
Daniel Vetter 2017-03-22 22:50:42 +01:00
parent 34a2ab5e06
commit 5fbef3ee4a
1 changed files with 8 additions and 0 deletions
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8
drivers/gpu/drm/drm_plane.c
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@ -277,6 +277,12 @@ EXPORT_SYMBOL(drm_plane_from_index);
*
* Used when the plane's current framebuffer is destroyed,
* and when restoring fbdev mode.
*
* Note that this function is not suitable for atomic drivers, since it doesn't
* wire through the lock acquisition context properly and hence can't handle
* retries or driver private locks. You probably want to use
* drm_atomic_helper_disable_plane() or
* drm_atomic_helper_disable_planes_on_crtc() instead.
*/
void drm_plane_force_disable(struct drm_plane *plane)
{
@ -285,6 +291,8 @@ void drm_plane_force_disable(struct drm_plane *plane)
if (!plane->fb)
return;
WARN_ON(drm_drv_uses_atomic_modeset(plane->dev));
plane->old_fb = plane->fb;
ret = plane->funcs->disable_plane(plane);
if (ret) {