diff options
| author | Thierry Reding <treding@nvidia.com> | 2014-06-27 17:19:24 +0200 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2014-07-08 11:31:28 +1000 |
| commit | 10a231026574f9ec9761b6435394b8830b485e4e (patch) | |
| tree | ae55c7173758db2778f02bb98954e7efceee5ec0 /drivers/gpu/drm/udl | |
| parent | 3a4938799dec32783759b0c66ee3bb8c82dd9937 (diff) | |
drm: Introduce drm_fb_helper_prepare()
To implement hotplug detection in a race-free manner, drivers must call
drm_kms_helper_poll_init() before hotplug events can be triggered. Such
events can be triggered right after any of the encoders or connectors
are initialized. At the same time, if the drm_fb_helper_hotplug_event()
helper is used by a driver, then the poll helper requires some parts of
the FB helper to be initialized to prevent a crash.
At the same time, drm_fb_helper_init() requires information that is not
necessarily available at such an early stage (number of CRTCs and
connectors), so it cannot be used yet.
Add a new helper, drm_fb_helper_prepare(), that initializes the bare
minimum needed to allow drm_kms_helper_poll_init() to execute and any
subsequent hotplug events to be processed properly.
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/udl')
| -rw-r--r-- | drivers/gpu/drm/udl/udl_fb.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/udl/udl_fb.c b/drivers/gpu/drm/udl/udl_fb.c index 0647c8cc368b..d1da339843ca 100644 --- a/drivers/gpu/drm/udl/udl_fb.c +++ b/drivers/gpu/drm/udl/udl_fb.c @@ -583,7 +583,8 @@ int udl_fbdev_init(struct drm_device *dev) return -ENOMEM; udl->fbdev = ufbdev; - ufbdev->helper.funcs = &udl_fb_helper_funcs; + + drm_fb_helper_prepare(dev, &ufbdev->helper, &udl_fb_helper_funcs); ret = drm_fb_helper_init(dev, &ufbdev->helper, 1, 1); |