From 5f8e17ce158894b46acb25b975c579fae2350523 Mon Sep 17 00:00:00 2001
From: Eric Nelson <eric.nelson@boundarydevices.com>
Date: Sun, 23 Sep 2012 07:30:54 +0000
Subject: [PATCH] i.MX: mxc_ipuv3_fb: add ipuv3_fb_shutdown() routine to stop
 IPU frame buffer

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
Tested-by: Fabio Estevam <fabio.estevam@freescale.com>
---
 drivers/video/mxc_ipuv3_fb.c | 20 ++++++++++++++++++++
 include/ipu_pixfmt.h         |  1 +
 2 files changed, 21 insertions(+)

diff --git a/drivers/video/mxc_ipuv3_fb.c b/drivers/video/mxc_ipuv3_fb.c
index c38e22de1f..47b336e7aa 100644
--- a/drivers/video/mxc_ipuv3_fb.c
+++ b/drivers/video/mxc_ipuv3_fb.c
@@ -38,6 +38,7 @@
 #include "videomodes.h"
 #include "ipu.h"
 #include "mxcfb.h"
+#include "ipu_regs.h"
 
 static int mxcfb_map_video_memory(struct fb_info *fbi);
 static int mxcfb_unmap_video_memory(struct fb_info *fbi);
@@ -576,6 +577,25 @@ err0:
 	return ret;
 }
 
+void ipuv3_fb_shutdown(void)
+{
+	int i;
+	struct ipu_stat *stat = (struct ipu_stat *)IPU_STAT;
+
+	for (i = 0; i < ARRAY_SIZE(mxcfb_info); i++) {
+		struct fb_info *fbi = mxcfb_info[i];
+		if (fbi) {
+			struct mxcfb_info *mxc_fbi = fbi->par;
+			ipu_disable_channel(mxc_fbi->ipu_ch);
+			ipu_uninit_channel(mxc_fbi->ipu_ch);
+		}
+	}
+	for (i = 0; i < ARRAY_SIZE(stat->int_stat); i++) {
+		__raw_writel(__raw_readl(&stat->int_stat[i]),
+			     &stat->int_stat[i]);
+	}
+}
+
 void *video_hw_init(void)
 {
 	int ret;
diff --git a/include/ipu_pixfmt.h b/include/ipu_pixfmt.h
index 0019898d51..4baa71187d 100644
--- a/include/ipu_pixfmt.h
+++ b/include/ipu_pixfmt.h
@@ -77,5 +77,6 @@
 #define IPU_PIX_FMT_YUV422P fourcc('4', '2', '2', 'P')	/*< 16 YUV 4:2:2 */
 
 int ipuv3_fb_init(struct fb_videomode *mode, uint8_t disp, uint32_t pixfmt);
+void ipuv3_fb_shutdown(void);
 
 #endif