From mboxrd@z Thu Jan 1 00:00:00 1970 From: Minkyu Kang Date: Fri, 25 Mar 2011 09:50:05 +0900 Subject: [U-Boot] [PATCH v3] Don't grab memory for LCD if FB address is defined In-Reply-To: <4D8B576B.3030507@free.fr> References: <4D75B591.3040605@samsung.com> <20110313195021.1B4D4E0CE97@gemini.denx.de> <4D7F24C3.9060006@samsung.com> <4D8B576B.3030507@free.fr> Message-ID: <4D8BE6BD.2090101@samsung.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de If FB address is defined specific address then don't grab memory for LCD Signed-off-by: Minkyu Kang Cc: Albert Aribaud Cc: Wolfgang Denk Cc: Stefan Roese Cc: Kim Phillips Cc: Andy Fleming Cc: Kumar Gala --- v3 fix whitespace errors 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