[PATCH 01/18] fbcon: Add ability to save/restore graphics state

[PATCH 01/18] fbcon: Add ability to save/restore graphics state

[Antonino A. Daplas]

Add hooks to save and restore the graphics state.  These hooks are called
in fbcon_blank() when entering/leaving KD_GRAPHICS mode.  This is needed
by savagefb at least so it can cooperate with savage_dri and by cyblafb.

State save/restoration can be full or partial.

Signed-off-by: Antonino Daplas <adaplas@pol.net>
---

 drivers/video/console/fbcon.c |    5 ++++-
 include/linux/fb.h            |    6 ++++++
 2 files changed, 10 insertions(+), 1 deletions(-)

diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c
index 1a8f0ea..9678045 100644
--- a/drivers/video/console/fbcon.c
+++ b/drivers/video/console/fbcon.c
@@ -2181,11 +2181,14 @@ static int fbcon_blank(struct vc_data *v
 		ops->graphics = 1;
 
 		if (!blank) {
+			if (info->fbops->fb_save_state)
+				info->fbops->fb_save_state(info);
 			var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
 			fb_set_var(info, &var);
 			ops->graphics = 0;
 			ops->var = info->var;
-		}
+		} else if (info->fbops->fb_restore_state)
+			info->fbops->fb_restore_state(info);
 	}
 
  	if (!fbcon_is_inactive(vc, info)) {
diff --git a/include/linux/fb.h b/include/linux/fb.h
index 58e6c21..7d6d970 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -617,6 +617,12 @@ struct fb_ops {
 
 	/* perform fb specific mmap */
 	int (*fb_mmap)(struct fb_info *info, struct file *file, struct vm_area_struct *vma);
+
+	/* save current hardware state */
+	void (*fb_save_state)(struct fb_info *info);
+
+	/* restore saved state */
+	void (*fb_restore_state)(struct fb_info *info);
 };
 
 #ifdef CONFIG_FB_TILEBLITTING




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