From b7086e0a1dec82bf7e8e96e17738151f0aee82fc Mon Sep 17 00:00:00 2001
From: Philippe Langlais <philippe.langlais@linaro.org>
Date: Fri, 30 Mar 2012 14:10:49 +0200
Subject: Revert "ux500: mcde: Remove unnecessary MCDE fbdev update"

This reverts commit 9bfa8c7f5cf9aff1df84f1761841c8f3e7c84e97.
---
 arch/arm/mach-ux500/board-mop500-mcde.c | 46 +++++++++++++++++++++++++++++++++
 arch/arm/mach-ux500/board-u5500-mcde.c  | 46 +++++++++++++++++++++++++++++++++
 2 files changed, 92 insertions(+)

diff --git a/arch/arm/mach-ux500/board-mop500-mcde.c b/arch/arm/mach-ux500/board-mop500-mcde.c
index e60842c86e8..3d8c8fc4852 100644
--- a/arch/arm/mach-ux500/board-mop500-mcde.c
+++ b/arch/arm/mach-ux500/board-mop500-mcde.c
@@ -415,11 +415,57 @@ static struct notifier_block display_nb = {
 	.notifier_call = display_postregistered_callback,
 };
 
+/*
+* This function is used to refresh the display (lcd, hdmi, tvout) with black
+* when the framebuffer is registered.
+* The main display will not be updated if startup graphics is displayed
+* from u-boot.
+*/
+static int framebuffer_postregistered_callback(struct notifier_block *nb,
+	unsigned long event, void *data)
+{
+	int ret = 0;
+	struct fb_event *event_data = data;
+	struct fb_info *info;
+	struct fb_var_screeninfo var;
+	struct fb_fix_screeninfo fix;
+	struct mcde_fb *mfb;
+
+	if (event != FB_EVENT_FB_REGISTERED)
+		return 0;
+
+	if (!event_data)
+		return 0;
+
+	info = event_data->info;
+	mfb = to_mcde_fb(info);
+	if (mfb->id == 0 && display_initialized_during_boot)
+		goto out;
+
+	var = info->var;
+	fix = info->fix;
+	var.yoffset = var.yoffset ? 0 : var.yres;
+	if (info->fbops->fb_pan_display)
+		ret = info->fbops->fb_pan_display(&var, info);
+out:
+	return ret;
+}
+
+static struct notifier_block framebuffer_nb = {
+	.notifier_call = framebuffer_postregistered_callback,
+};
+
 static int __init init_display_devices(void)
 {
+	int ret;
+
 	if (!cpu_is_u8500())
 		return 0;
 
+	ret = fb_register_client(&framebuffer_nb);
+	if (ret)
+		pr_warning("Failed to register framebuffer notifier\n");
+
 	(void)mcde_dss_register_notifier(&display_nb);
 
 	/* Set powermode to STANDBY if startup graphics is executed */
diff --git a/arch/arm/mach-ux500/board-u5500-mcde.c b/arch/arm/mach-ux500/board-u5500-mcde.c
index d28ee6473df..906b5572229 100644
--- a/arch/arm/mach-ux500/board-u5500-mcde.c
+++ b/arch/arm/mach-ux500/board-u5500-mcde.c
@@ -203,11 +203,57 @@ static struct notifier_block display_nb = {
 	.notifier_call = display_postregistered_callback,
 };
 
+/*
+* This function is used to refresh the display (lcd, hdmi, tvout) with black
+* when the framebuffer is registered.
+* The main display will not be updated if startup graphics is displayed
+* from u-boot.
+*/
+static int framebuffer_postregistered_callback(struct notifier_block *nb,
+	unsigned long event, void *data)
+{
+	int ret = 0;
+	struct fb_event *event_data = data;
+	struct fb_info *info;
+	struct fb_var_screeninfo var;
+	struct fb_fix_screeninfo fix;
+	struct mcde_fb *mfb;
+
+	if (event != FB_EVENT_FB_REGISTERED)
+		return 0;
+
+	if (!event_data)
+		return 0;
+
+	info = event_data->info;
+	mfb = to_mcde_fb(info);
+	if (mfb->id == 0 && display_initialized_during_boot)
+		goto out;
+
+	var = info->var;
+	fix = info->fix;
+	var.yoffset = var.yoffset ? 0 : var.yres;
+	if (info->fbops->fb_pan_display)
+		ret = info->fbops->fb_pan_display(&var, info);
+out:
+	return ret;
+}
+
+static struct notifier_block framebuffer_nb = {
+	.notifier_call = framebuffer_postregistered_callback,
+};
+
 int __init init_u5500_display_devices(void)
 {
+	int ret;
+
 	if (!cpu_is_u5500())
 		return 0;
 
+	ret = fb_register_client(&framebuffer_nb);
+	if (ret)
+		pr_warning("Failed to register framebuffer notifier\n");
+
 	(void)mcde_dss_register_notifier(&display_nb);
 
 	if (display_initialized_during_boot)
-- 
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