topic Re: iMX6Q - splash screen issue in u-boot in i.MX Processors

iMX6Q - splash screen issue in u-boot

rickchu — Wed, 02 Oct 2013 03:34:59 GMT

Hi,

I have enabled splash screen support in u-boot. The splash screen can display correct on my LCD (LVDS interface based), but it looks like have fog over image (reference with attach picture).

Is it possible caused by IPU setting? Any advise is appreciated.

Rick

Re: iMX6Q - splash screen issue in u-boot

SergioSolis — Wed, 02 Oct 2013 15:44:51 GMT

Hello Rick,

Are you using a Freescale i.MX6 board?, right after the splash screen are you able to see the OS correctly, or is it still foggy?

Re: iMX6Q - splash screen issue in u-boot

rickchu — Thu, 03 Oct 2013 00:50:10 GMT

Its our hardware platform not SABRESD board; and the screen become normal after jump to kernel image.

In u-boot, I modify panel configuration same as kernel and then enable splash screen support, but got foggy screen in u-boot.

Have no idea why this issue happened?

----> mx6q_sabresd.c

static struct fb_videomode lvds_wxga = {

"WXGA", // *name

60, // refresh

1024, 600, // xres, yres

19531, // pixclock

160, // left_margin

160, // right_margin

18, // upper_margin

18, // lower_margin

160, // hsync_len

18, // vsync_len

FB_SYNC_EXT, // sync

FB_VMODE_NONINTERLACED, // vmode

0, // flag

};

ret = ipuv3_fb_init(&lvds_wxga, di, IPU_PIX_FMT_RGB24,

DI_PCLK_LDB, 65000000);

----> mx6q_sabresd.h

#define CONFIG_SPLASH_SCREEN

#ifdef CONFIG_SPLASH_SCREEN

* Framebuffer and LCD

#define CONFIG_LCD

#define CONFIG_IPU_V3H

#define CONFIG_VIDEO_MX5

#define CONFIG_IPU_CLKRATE 260000000

#define CONFIG_SYS_CONSOLE_ENV_OVERWRITE

#define CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE

#define CONFIG_SYS_CONSOLE_IS_IN_ENV

#define LCD_BPP LCD_COLOR16

#define CONFIG_CMD_BMP

#define CONFIG_BMP_8BPP

// #define CONFIG_BMP_16BPP

// #define CONFIG_BMP_24BPP

#define CONFIG_FB_BASE (TEXT_BASE + 0x300000)

#define CONFIG_SPLASH_SCREEN_ALIGN

#define CONFIG_SYS_WHITE_ON_BLACK

#define CONFIG_IMX_PWM

#define IMX_PWM1_BASE PWM1_BASE_ADDR

#define IMX_PWM2_BASE PWM2_BASE_ADDR

#endif

----> mx6q_sabresd_android.h

#define	CONFIG_EXTRA_ENV_SETTINGS		\
		"netdev=eth0\0"			\
		"ethprime=FEC0\0"		\
		"splashimage=0x30000000\0"	\
		"splashpos=m,m\0"		\
		"lvds_num=0\0"

#endif

Re: iMX6Q - splash screen issue in u-boot

fabio_estevam — Thu, 03 Oct 2013 13:04:52 GMT

I would suggest you to try the mainline U-boot. It does provide support for splash via HDMI or LVDS on sabresd boards.

Re: iMX6Q - splash screen issue in u-boot

Babu — Tue, 24 Jun 2014 10:03:09 GMT

Hello Rick,

can you post complete procedure how you have enabled splash screen in u-boot including frame buffer driver . i am using imx6q sabreauto board.

Thank you

Babu A

Re: iMX6Q - splash screen issue in u-boot

rickchu — Wed, 25 Jun 2014 01:01:59 GMT

Hi Babu,

Our hardware was referenced with iMX6Q Sabresd board; and splash screen with LVDS has included with original u-boot source codes.

I just changed LVDS output port and different LCD parameters to accord our hardware.

I didn't know what's different between Sabresd and Sabreauto borad, you may need to create an new topic in freescale discuss forum for help.

Rick

Re: iMX6Q - splash screen issue in u-boot

oppoman — Fri, 18 Dec 2015 18:50:49 GMT

I know this is a shot in the dark, but were ever you able to figure this out? I'm running into the exact same scenario...

Re: iMX6Q - splash screen issue in u-boot

oppoman — Mon, 04 Jan 2016 18:34:53 GMT

I figured out my problem. It was due to the wrong color space being used for the display initialization, I was using 16bit instead of 24.

Basically the alpha channels were getting screwed up during display.