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video: mxc_ipuv3_fb: stash frame buffer pointer in global data.

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This patch updates the i.MX video driver to store the
frame-buffer address in the fb_base field of the global
data structure *gd.

By doing this, you can find the frame buffer address
using the 'bdinfo' command:

	U-Boot > bdinfo
	arch_number = 0x00000EB9
	...
	FB base     = 0x4F35F1C0

This is very useful when debugging display connections.

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
Acked-by: Otavio Salvador <otavio@ossystems.com.br>
Acked-by: Marek Vasut <marex@denx.de>
This commit is contained in:
Eric Nelson 2014-04-29 14:37:56 -07:00 committed by Anatolij Gustschin
parent a405764c1e
commit a69214dc71
1 changed files with 5 additions and 0 deletions
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5
drivers/video/mxc_ipuv3_fb.c
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@ -13,6 +13,7 @@
#include <common.h>
#include <asm/errno.h>
#include <asm/global_data.h>
#include <linux/string.h>
#include <linux/list.h>
#include <linux/fb.h>
@ -24,6 +25,8 @@
#include "mxcfb.h"
#include "ipu_regs.h"
DECLARE_GLOBAL_DATA_PTR;
static int mxcfb_map_video_memory(struct fb_info *fbi);
static int mxcfb_unmap_video_memory(struct fb_info *fbi);
@ -415,6 +418,8 @@ static int mxcfb_map_video_memory(struct fb_info *fbi)
fbi->screen_size = fbi->fix.smem_len;
gd->fb_base = fbi->fix.smem_start;
/* Clear the screen */
memset((char *)fbi->screen_base, 0, fbi->fix.smem_len);