diff options
| author | Thierry Reding <treding@nvidia.com> | 2014-06-27 17:19:24 +0200 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2014-07-08 03:31:28 +0200 |
| commit | 10a231026574f9ec9761b6435394b8830b485e4e (patch) | |
| tree | ae55c7173758db2778f02bb98954e7efceee5ec0 /drivers/gpu/drm/tegra | |
| parent | drm: Constify struct drm_fb_helper_funcs (diff) | |
| download | linux-10a231026574f9ec9761b6435394b8830b485e4e.tar.xz linux-10a231026574f9ec9761b6435394b8830b485e4e.zip | |
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/tegra')
| -rw-r--r-- | drivers/gpu/drm/tegra/fb.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/gpu/drm/tegra/fb.c b/drivers/gpu/drm/tegra/fb.c index f7cf47bf0afb..d5d53aa79ced 100644 --- a/drivers/gpu/drm/tegra/fb.c +++ b/drivers/gpu/drm/tegra/fb.c @@ -276,7 +276,6 @@ static struct tegra_fbdev *tegra_fbdev_create(struct drm_device *drm, unsigned int num_crtc, unsigned int max_connectors) { - struct drm_fb_helper *helper; struct tegra_fbdev *fbdev; int err; @@ -286,8 +285,7 @@ static struct tegra_fbdev *tegra_fbdev_create(struct drm_device *drm, return ERR_PTR(-ENOMEM); } - fbdev->base.funcs = &tegra_fb_helper_funcs; - helper = &fbdev->base; + drm_fb_helper_prepare(drm, &fbdev->base, &tegra_fb_helper_funcs); err = drm_fb_helper_init(drm, &fbdev->base, num_crtc, max_connectors); if (err < 0) { |