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| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2017-02-07 17:10:49 +0300 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2017-02-07 23:35:54 +0300 |
| commit | ed84e2542d2278bf1eff14b6bbd60ba74c8a5602 (patch) | |
| tree | 6b2fb30b69718919708f05735d9334bcfae920bb /drivers/gpu/drm/drm_fb_helper.c | |
| parent | 0e70dad08393b218c08c4b741585d25e51b6f0c3 (diff) | |
| download | linux-ed84e2542d2278bf1eff14b6bbd60ba74c8a5602.tar.xz | |
drm/fb-helper: Explain unload sequence a bit better
While reviewing Chris' patches to properly cancel our async workers I
checked that this happens after the fbdev is already unregistered.
That's the case, but I found a small gap in our docs, fill that in.
Note that I don't explain what release_fbi does, because that function
will disappear in the next patch ...
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170207141050.1129-1-daniel.vetter@ffwll.ch
Diffstat (limited to 'drivers/gpu/drm/drm_fb_helper.c')
| -rw-r--r-- | drivers/gpu/drm/drm_fb_helper.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index a30c645035de..d207ea376c0a 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -63,7 +63,8 @@ static DEFINE_MUTEX(kernel_fb_helper_lock); * drm_fb_helper_init(), drm_fb_helper_single_add_all_connectors() and * drm_fb_helper_initial_config(). Drivers with fancier requirements than the * default behaviour can override the third step with their own code. - * Teardown is done with drm_fb_helper_fini(). + * Teardown is done with drm_fb_helper_fini() after the fbdev device is + * unregisters using drm_fb_helper_unregister_fbi(). * * At runtime drivers should restore the fbdev console by calling * drm_fb_helper_restore_fbdev_mode_unlocked() from their &drm_driver.lastclose @@ -709,7 +710,7 @@ void drm_fb_helper_prepare(struct drm_device *dev, struct drm_fb_helper *helper, EXPORT_SYMBOL(drm_fb_helper_prepare); /** - * drm_fb_helper_init - initialize a drm_fb_helper structure + * drm_fb_helper_init - initialize a &struct drm_fb_helper * @dev: drm device * @fb_helper: driver-allocated fbdev helper structure to initialize * @max_conn_count: max connector count @@ -823,7 +824,8 @@ EXPORT_SYMBOL(drm_fb_helper_alloc_fbi); * @fb_helper: driver-allocated fbdev helper * * A wrapper around unregister_framebuffer, to release the fb_info - * framebuffer device + * framebuffer device. This must be called before releasing all resources for + * @fb_helper by calling drm_fb_helper_fini(). */ void drm_fb_helper_unregister_fbi(struct drm_fb_helper *fb_helper) { @@ -855,6 +857,13 @@ void drm_fb_helper_release_fbi(struct drm_fb_helper *fb_helper) } EXPORT_SYMBOL(drm_fb_helper_release_fbi); +/** + * drm_fb_helper_fini - finialize a &struct drm_fb_helper + * @fb_helper: driver-allocated fbdev helper + * + * This cleans up all remaining resources associated with @fb_helper. Must be + * called after drm_fb_helper_unlink_fbi() was called. + */ void drm_fb_helper_fini(struct drm_fb_helper *fb_helper) { if (!drm_fbdev_emulation) |