fbcon: replace FB_EVENT_MODE_CHANGE/_ALL with direct calls

Create a new wrapper function for this, feels like there's some
refactoring room here between the two modes.

v2: backlight notifier is also interested in the mode change event,
it calls lcd->set_mode, of which there are 3 implementations. Thanks
to Maarten for spotting this. So we keep that. We can ditch the differentiation
between mode change and all mode changes (because backlight notifier
doesn't care), and we can drop the FBINFO_MISC_USEREVENT stuff too,
because that's just to prevent recursion between fbmem.c and fbcon.c.

While at it flatten the control flow a bit.

v3: Need to add a static inline to the dummy function.

v4: Add missing #include <fbcon.h> to sh_mob (Sam).

Cc: Sam Ravnborg <sam@ravnborg.org>
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: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
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: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Peter Rosin <peda@axentia.se>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: linux-fbdev@vger.kernel.org
Link: https://patchwork.freedesktop.org/patch/msgid/20190528090304.9388-29-daniel.vetter@ffwll.ch

2 files changed, 19 insertions, 17 deletions

diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index 4afbc7d8c68c..1837985e1ffb 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -3009,6 +3009,15 @@ static void fbcon_set_all_vcs(struct fb_info *info)
 		fbcon_modechanged(info);
 }
 
+
+void fbcon_update_vcs(struct fb_info *info, bool all)
+{
+	if (all)
+		fbcon_set_all_vcs(info);
+	else
+		fbcon_modechanged(info);
+}
+
 int fbcon_mode_deleted(struct fb_info *info,
 		       struct fb_videomode *mode)
 {
@@ -3318,12 +3327,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 	int idx, ret = 0;
 
 	switch(action) {
-	case FB_EVENT_MODE_CHANGE:
-		fbcon_modechanged(info);
-		break;
-	case FB_EVENT_MODE_CHANGE_ALL:
-		fbcon_set_all_vcs(info);
-		break;
 	case FB_EVENT_SET_CONSOLE_MAP:
 		/* called with console lock held */
 		con2fb = event->data;
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 96805fe85332..dd1a708df1a7 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -957,6 +957,7 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
 	u32 activate;
 	struct fb_var_screeninfo old_var;
 	struct fb_videomode mode;
+	struct fb_event event;
 
 	if (var->activate & FB_ACTIVATE_INV_MODE) {
 		struct fb_videomode mode1, mode2;
@@ -1039,19 +1040,17 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
 	    !list_empty(&info->modelist))
 		ret = fb_add_videomode(&mode, &info->modelist);
 
-	if (!ret && (flags & FBINFO_MISC_USEREVENT)) {
-		struct fb_event event;
-		int evnt = (activate & FB_ACTIVATE_ALL) ?
-			FB_EVENT_MODE_CHANGE_ALL :
-			FB_EVENT_MODE_CHANGE;
+	if (ret)
+		return ret;
 
-		info->flags &= ~FBINFO_MISC_USEREVENT;
-		event.info = info;
-		event.data = &mode;
-		fb_notifier_call_chain(evnt, &event);
-	}
+	event.info = info;
+	event.data = &mode;
+	fb_notifier_call_chain(FB_EVENT_MODE_CHANGE, &event);
 
-	return ret;
+	if (flags & FBINFO_MISC_USEREVENT)
+		fbcon_update_vcs(info, activate & FB_ACTIVATE_ALL);
+
+	return 0;
 }
 EXPORT_SYMBOL(fb_set_var);