Hi, On Fri, 19 Apr 2013 21:29:33 +0530 Bhargav A K <[email protected]> wrote:
> Hi All, > > I have enabled the following configurations. > in my board's config header > > #define CONFIG_VGA_AS_SINGLE_DEVICE > #define CONFIG_VIDEO > #define CONFIG_CFB_CONSOLE > > video_hw_init() returns a pointer to GraphicsDevice structure. > > It does the following > ----------------------------------------------------- > omap4_GD.winSizeX = 480; //__raw_readl() > omap4_GD.winSizeY = 800; > omap4_GD.gdfBytesPP = 4; > omap4_GD.gdfIndex = GDF_32BIT_X888RGB; > > __raw_writel(0xA5000000, DISPC_GFX_BA0); > omap4_GD.frameAdrs = __raw_readl(DISPC_GFX_BA0); Why are you using 0xA5000000 address here as the frame buffer base address? Are you sure that this is a valid memory address? Can you see changes on the display if you write data to this address by U-Boot "mw" command (i.e. "mw a5000000 ffffffff 100") ? Which frame buffer base address did you use before for working splashscreen? > initDisplay(); // Do all other clocks, GPIOs, OMAP4 registers specific for > LCD(DSI, DISPC, DSS). > ------------------------------------------------------ > > board_video_init() is just a dummy call. > > I did a console_assign() to redirect stderr and stdout to vga. > All the printf's doesn't come on the serial console or the LCD. > > I tried using the video_drawstring(10, 20, "hello world"), > after resetting the stdout to serial. I see all the "printf's" on the > serial console, but the string from video_drawstring()(hello world) > won't come on the LCD even after syncing LCD pipelines (GO_LCD in OMAP4470). Probably the frame buffer or display controller configuration is wrong then. Is the display backlight enabled? > Then I just exported the lcd_drawchars() function into my LCD code, > tried to write characters to the LCD, nothing came onto the screen. lcd_drawchars() will not help since you do not use the lcd driver. Thanks, Anatolij _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
