fbdev: Add fbset -a support

Add capability to fbdev to listen to the FB_ACTIVATE_ALL flag. If set, it notifies fbcon that all consoles must be set to the current var.

From: Antonino Daplas <[email protected]>

---

drivers/video/console/fbcon.c |   48 ++++++++++++++++++++++++++++++++++++++++++
drivers/video/fbmem.c         |    6 +++--
include/linux/fb.h            |    3 ++
3 files changed, 55 insertions(+), 2 deletions(-)

Index: drivers/video/console/fbcon.c
===================================================================
@@ -2592,6 +2592,51 @@

	}
}

+static void fbcon_set_all_vcs(struct fb_info *info) +{
+ struct fbcon_ops *ops = info->fbcon_par;
+ struct vc_data *vc;
+ struct display *p;
+ int i, rows, cols;
+
+ if (!ops || ops->currcon < 0)
+ return;
+
+ for (i = 0; i < MAX_NR_CONSOLES; i++) {
+ vc = vc_cons[i].d;
+ if (!vc || vc->vc_mode != KD_TEXT ||
+ registered_fb[con2fb_map[i]] != info)
+ continue;
+
+ p = &fb_display[vc->vc_num];
+
+ info->var.xoffset = info->var.yoffset = p->yscroll = 0;
+ var_to_display(p, &info->var, info);
+ cols = info->var.xres / vc->vc_font.width;
+ rows = info->var.yres / vc->vc_font.height;
+ vc_resize(vc, cols, rows);
+
+ if (CON_IS_VISIBLE(vc)) {
+ updatescrollmode(p, info, vc);
+ scrollback_max = 0;
+ scrollback_current = 0;
+ update_var(vc->vc_num, info);
+ fbcon_set_palette(vc, color_table);
+ update_screen(vc);
+ if (softback_buf) {
+ int l = fbcon_softback_size / vc->vc_size_row;
+ if (l > 5)
+ softback_end = softback_buf + l * vc->vc_size_row;
+ else {
+ /* Smaller scrollback makes no sense, and 0
+ would screw the operation totally */
+ softback_top = 0;
+ }
+ }
+ }
+ }
+}
+
static int fbcon_mode_deleted(struct fb_info *info,
struct fb_videomode *mode)
{
@@ -2707,6 +2752,9 @@

	case FB_EVENT_MODE_CHANGE:
		fbcon_modechanged(info);
		break;
+	case FB_EVENT_MODE_CHANGE_ALL:
+		fbcon_set_all_vcs(info);
+		break;
	case FB_EVENT_MODE_DELETE:
		mode = event->data;
		ret = fbcon_mode_deleted(info, mode);

Index: drivers/video/fbmem.c
===================================================================
@@ -682,11 +682,13 @@
 

			if (!err && info->flags & FBINFO_MISC_USEREVENT) {
				struct fb_event event;

+ int evnt = (var->activate & FB_ACTIVATE_ALL) ?
+ FB_EVENT_MODE_CHANGE_ALL :
+ FB_EVENT_MODE_CHANGE;

				info->flags &= ~FBINFO_MISC_USEREVENT;
				event.info = info;
-				notifier_call_chain(&fb_notifier_list,
-						    FB_EVENT_MODE_CHANGE,
+				notifier_call_chain(&fb_notifier_list, evnt,
						    &event);
			}
		}

Index: include/linux/fb.h
===================================================================
@@ -495,6 +495,9 @@

#define FB_EVENT_BLANK 0x08
/* Private modelist is to be replaced */
#define FB_EVENT_NEW_MODELIST 0x09
+/* The resolution of the passed in fb_info about to change and
+ all vc's should be changed */
+#define FB_EVENT_MODE_CHANGE_ALL 0x0A

struct fb_event {
	struct fb_info *info;

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