Hi,
On Fri, 19 Apr 2013 21:29:33 +0530 Bhargav A K bhargav.ak@sasken.com 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