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Revert "backlight/fbcon: Add FB_EVENT_CONBLANK"

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This reverts commit 994efacdf9.

The justification is that if hw blanking fails (i.e. fbops->fb_blank)
fails, then we still want to shut down the backlight. Which is exactly
_not_ what fb_blank() does and so rather inconsistent if we end up
with different behaviour between fbcon and direct fbdev usage. Given
that the entire notifier maze is getting in the way anyway I figured
it's simplest to revert this not well justified commit.

v2: Add static inline to the dummy version.

Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Acked-by: Daniel Thompson <daniel.thompson@linaro.org>
Cc: Lee Jones <lee.jones@linaro.org>
Cc: Daniel Thompson <daniel.thompson@linaro.org>
Cc: Jingoo Han <jingoohan1@gmail.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Yisheng Xie <ysxie@foxmail.com>
Cc: linux-fbdev@vger.kernel.org
Link: https://patchwork.freedesktop.org/patch/msgid/20190528090304.9388-25-daniel.vetter@ffwll.ch
This commit is contained in:
Daniel Vetter 2019-05-28 11:02:55 +02:00
parent 0526c2239a
commit 7a625549ea
5 changed files with 6 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/video/backlight/backlight.c
View File

@ -47,7 +47,7 @@ static int fb_notifier_callback(struct notifier_block *self,
int fb_blank = 0;
/* If we aren't interested in this event, skip it immediately ... */
if (event != FB_EVENT_BLANK && event != FB_EVENT_CONBLANK)
if (event != FB_EVENT_BLANK)
return 0;
bd = container_of(self, struct backlight_device, fb_notif);

14
drivers/video/fbdev/core/fbcon.c
View File

@ -2350,8 +2350,6 @@ static int fbcon_switch(struct vc_data *vc)
static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
int blank)
{
struct fb_event event;
if (blank) {
unsigned short charmask = vc->vc_hi_font_mask ?
0x1ff : 0xff;
@ -2362,13 +2360,6 @@ static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
vc->vc_video_erase_char = oldc;
}
lock_fb_info(info);
event.info = info;
event.data = &blank;
fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
unlock_fb_info(info);
}
static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
@ -3240,7 +3231,7 @@ int fbcon_fb_registered(struct fb_info *info)
return ret;
}
static void fbcon_fb_blanked(struct fb_info *info, int blank)
void fbcon_fb_blanked(struct fb_info *info, int blank)
{
struct fbcon_ops *ops = info->fbcon_par;
struct vc_data *vc;
@ -3344,9 +3335,6 @@ static int fbcon_event_notify(struct notifier_block *self,
con2fb = event->data;
con2fb->framebuffer = con2fb_map[con2fb->console - 1];
break;
case FB_EVENT_BLANK:
fbcon_fb_blanked(info, *(int *)event->data);
break;
case FB_EVENT_REMAP_ALL_CONSOLE:
idx = info->node;
fbcon_remap_all(idx);

1
drivers/video/fbdev/core/fbmem.c
View File

@ -1068,6 +1068,7 @@ fb_blank(struct fb_info *info, int blank)
event.data = &blank;
early_ret = fb_notifier_call_chain(FB_EARLY_EVENT_BLANK, &event);
fbcon_fb_blanked(info, blank);
if (info->fbops->fb_blank)
ret = info->fbops->fb_blank(blank, info);

4
include/linux/fb.h
View File

@ -137,12 +137,10 @@ struct fb_cursor_user {
#define FB_EVENT_GET_CONSOLE_MAP 0x07
/* CONSOLE-SPECIFIC: set console to framebuffer mapping */
#define FB_EVENT_SET_CONSOLE_MAP 0x08
/* A hardware display blank change occurred */
/* A display blank is requested */
#define FB_EVENT_BLANK 0x09
/* Private modelist is to be replaced */
#define FB_EVENT_MODE_CHANGE_ALL 0x0B
/* A software display blank change occurred */
#define FB_EVENT_CONBLANK 0x0C
/* CONSOLE-SPECIFIC: remap all consoles to new fb - for vga_switcheroo */
#define FB_EVENT_REMAP_ALL_CONSOLE 0x0F
/* A hardware display blank early change occurred */

2
include/linux/fbcon.h
View File

@ -14,6 +14,7 @@ int fbcon_mode_deleted(struct fb_info *info,
void fbcon_new_modelist(struct fb_info *info);
void fbcon_get_requirement(struct fb_info *info,
struct fb_blit_caps *caps);
void fbcon_fb_blanked(struct fb_info *info, int blank);
#else
static inline void fb_console_init(void) {}
static inline void fb_console_exit(void) {}
@ -27,6 +28,7 @@ static inline int fbcon_mode_deleted(struct fb_info *info,
static inline void fbcon_new_modelist(struct fb_info *info) {}
static inline void fbcon_get_requirement(struct fb_info *info,
struct fb_blit_caps *caps) {}
static inline void fbcon_fb_blanked(struct fb_info *info, int blank) {}
#endif
#endif /* _LINUX_FBCON_H */