[U-Boot] [PATCH v2] Don't grab memory for LCD if FB address is defined

Minkyu Kang
2011-03-15T08:35:15Z

f FB address is defined specific address then don't grab memory for LCD

Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
Cc: Albert Aribaud <albert.aribaud@free.fr>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Stefan Roese <sr@denx.de>
Cc: Kim Phillips <kim.phillips@freescale.com>
Cc: Andy Fleming <afleming@gmail.com>
Cc: Kumar Gala <kumar.gala@freescale.com>
---
v2
add document

arch/arm/lib/board.c | 4 ++++
arch/m68k/lib/board.c | 4 ++++
arch/powerpc/lib/board.c | 4 ++++
doc/README.fb_addr | 17 +++++++++++++++++
4 files changed, 29 insertions(+), 0 deletions(-)
create mode 100644 doc/README.fb_addr

diff --git a/arch/arm/lib/board.c b/arch/arm/lib/board.c
index c620d2c..5a4d2bd 100644
--- a/arch/arm/lib/board.c
+++ b/arch/arm/lib/board.c
@@ -356,9 +356,13 @@ void board_init_f (ulong bootflag)
#endif /* CONFIG_VFD */

#ifdef CONFIG_LCD
+#ifdef CONFIG_FB_ADDR
+ gd->fb_base = CONFIG_FB_ADDR;
+#else
/* reserve memory for LCD display (always full pages) */
addr = lcd_setmem (addr);
gd->fb_base = addr;
+#endif /* CONFIG_FB_ADDR */
#endif /* CONFIG_LCD */

/*
diff --git a/arch/m68k/lib/board.c b/arch/m68k/lib/board.c
index 7867ba5..a6cd9b8 100644
--- a/arch/m68k/lib/board.c
+++ b/arch/m68k/lib/board.c
@@ -277,9 +277,13 @@ board_init_f (ulong bootflag)
debug ("Top of RAM usable for U-Boot at: %08lx\n", addr);

#ifdef CONFIG_LCD
+#ifdef CONFIG_FB_ADDR
+ gd->fb_base = CONFIG_FB_ADDR;
+#else
/* reserve memory for LCD display (always full pages) */
addr = lcd_setmem (addr);
gd->fb_base = addr;
+#endif /* CONFIG_FB_ADDR */
#endif /* CONFIG_LCD */

/*
diff --git a/arch/powerpc/lib/board.c b/arch/powerpc/lib/board.c
index b88cf6b..09c20e9 100644
--- a/arch/powerpc/lib/board.c
+++ b/arch/powerpc/lib/board.c
@@ -453,9 +453,13 @@ void board_init_f (ulong bootflag)
debug ("Top of RAM usable for U-Boot at: %08lx\n", addr);

#ifdef CONFIG_LCD
+#ifdef CONFIG_FB_ADDR
+ gd->fb_base = CONFIG_FB_ADDR;
+#else
/* reserve memory for LCD display (always full pages) */
addr = lcd_setmem (addr);
gd->fb_base = addr;
+#endif /* CONFIG_FB_ADDR */
#endif /* CONFIG_LCD */

#if defined(CONFIG_VIDEO) && defined(CONFIG_8xx)
diff --git a/doc/README.fb_addr b/doc/README.fb_addr
new file mode 100644
index 0000000..ea8bca6
--- /dev/null
+++ b/doc/README.fb_addr
@@ -0,0 +1,17 @@
+Define CONFIG_FB_ADDR if you want to use specific address for frame buffer.
+Then system will reserve the frame buffer address to defined address instead of
+lcd_setmem (this function grab the memory for frame buffer by panel's size).
+
+Please see below code (in board_init_f function from arch/arm/lib/board.c)
+
+#ifdef CONFIG_FB_ADDR
+ gd->fb_base = CONFIG_FB_ADDR;
+#else
+ /* reserve memory for LCD display (always full pages) */
+ addr = lcd_setmem (addr);
+ gd->fb_base = addr;
+#endif /* CONFIG_FB_ADDR */
+
+If you want this config option then please define it at your board config file
+
+#define CONFIG_FB_ADDR 0x00000000
--
1.7.1