[U-Boot] [PATCH v4] Don't grab memory for LCD if FB address is defined

Minkyu Kang
2011-04-25T08:22:34Z

If 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>
---
v4
move the document
v3
fix whitespace errors
v2
add document

README | 14 ++++++++++++++
arch/arm/lib/board.c | 4 ++++
arch/m68k/lib/board.c | 4 ++++
arch/powerpc/lib/board.c | 4 ++++
4 files changed, 26 insertions(+), 0 deletions(-)

diff --git a/README b/README
index beb1cbb..c5533b4 100644
--- a/README
+++ b/README
@@ -2009,6 +2009,20 @@ The following options need to be configured:
thus overwriting the architecutre dependent default
settings.

+- Frame Buffer Address:
+ CONFIG_FB_ADDR
+
+ 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 board_init_f function.
+
+ If you want this config option then,
+ please define it at your board config file
+
Legacy uImage format:

Arg Where When
diff --git a/arch/arm/lib/board.c b/arch/arm/lib/board.c
index dc46e21..db13ad1 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 f824b34..6a892db 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 83fb074..aaa5add 100644
--- a/arch/powerpc/lib/board.c
+++ b/arch/powerpc/lib/board.c
@@ -459,9 +459,13 @@ 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)
--
1.7.1