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| author | Thomas Zimmermann <tzimmermann@suse.de> | 2025-03-21 12:53:55 +0300 |
|---|---|---|
| committer | Lee Jones <lee@kernel.org> | 2025-04-10 12:38:57 +0300 |
| commit | 7e3711eb87c584ed224a7ad7000eba36e6fa3a51 (patch) | |
| tree | 5ab939c5f2b4bb0df5c5ea31ef0c227ff570033e /include/linux | |
| parent | 93e41f968d7c6ea1cedc6b365917cbb787ef08f6 (diff) | |
| download | linux-7e3711eb87c584ed224a7ad7000eba36e6fa3a51.tar.xz | |
fbdev: Track display blanking state
Store the display's blank status in struct fb_info.blank and track
it in fb_blank(). As an extra, the status is now available from the
sysfs blank attribute.
Support for blanking is optional. Therefore framebuffer_alloc()
initializes the state to FB_BLANK_UNBLANK (i.e., the display is
on). If the fb_blank callback has been set, register_framebuffer()
sets the state to FB_BLANK_POWERDOWN. On the first modeset, the
call to fb_blank() will update it to _UNBLANK. This is important,
as listeners to FB_EVENT_BLANK will now see the display being
switched on.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Simona Vetter <simona.vetter@ffwll.ch>
Link: https://lore.kernel.org/r/20250321095517.313713-3-tzimmermann@suse.de
Signed-off-by: Lee Jones <lee@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/fb.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/fb.h b/include/linux/fb.h index cd653862ab99..348aa2e146e2 100644 --- a/include/linux/fb.h +++ b/include/linux/fb.h @@ -472,6 +472,8 @@ struct fb_info { struct list_head modelist; /* mode list */ struct fb_videomode *mode; /* current mode */ + int blank; /* current blanking; see FB_BLANK_ constants */ + #if IS_ENABLED(CONFIG_FB_BACKLIGHT) /* assigned backlight device */ /* set before framebuffer registration, |