Allwinner v3s study notes (3)-u-boot boot logo replacement

1. The picture is processed in BMP format

PS make direct use of a screen pixel size image (for example: 480*272)
or prepare a jpeg image via the command line treatment for the 8bit BMPpicture, namedmylogo.bmp

vim to_bmp.sh
chmod 777 to_bmp.sh
./to_bmp.sh [待处理的JPG图片名] [输出文件名]

to_bmp.sh

#!/bin/sh
#install Netpbm first
jpegtopnm $1 | ppmquant 31 | ppmtobmp -bpp 8 > $2

2. Modify the boot LOGO

• Uboot's boot logo CONFIG_VIDEO_LOGOis the penguin logo by default (only defined ). This is a header file ( include/video_logo.hor bmp_logo.h) that exists in the uboot code . This is a huge structure that holds the color data of each pixel of the picture.
• The bmp files mylogo.bmpinto uboot/tools/logosand modify / tools / underMakefile
• bmp files are tools/bmp_logo.ctools compile the bmp_logomade intoinclude/bmp_logo.h

# Generated LCD/video logo
LOGO_H = $(objtree)/include/bmp_logo.h
LOGO_DATA_H = $(objtree)/include/bmp_logo_data.h
LOGO-$(CONFIG_LCD_LOGO) += $(LOGO_H)
LOGO-$(CONFIG_LCD_LOGO) += $(LOGO_DATA_H)
LOGO-$(CONFIG_VIDEO_LOGO) += $(LOGO_H)
LOGO-$(CONFIG_VIDEO_LOGO) += $(LOGO_DATA_H)

# Generic logo
ifeq ($(LOGO_BMP),)
# LOGO_BMP= $(srctree)/$(src)/logos/denx.bmp
LOGO_BMP= $(srctree)/$(src)/logos/mylogo.bmp	# 修改此处的logo

# Use board logo and fallback to vendor
ifneq ($(wildcard $(srctree)/$(src)/logos/$(BOARD).bmp),)
LOGO_BMP= $(srctree)/$(src)/logos/$(BOARD).bmp
else
ifneq ($(wildcard $(srctree)/$(src)/logos/$(VENDOR).bmp),)
LOGO_BMP= $(srctree)/$(src)/logos/$(VENDOR).bmp
endif
endif

endif # !LOGO_BMP

Add LOGO display configuration:

In include/configs/sun8i.hadding two macro definitions:

/*
 * Include common sunxi configuration where most the settings are
 */
#include <configs/sunxi-common.h>

#define CONFIG_VIDEO_LOGO
#define CONFIG_VIDEO_BMP_LOGO

#endif /* __CONFIG_H */

Custom macros CONFIG_VIDEO_LOGOrelevant to execute code drivers/video/cfb_console.cunder:

#ifdef CONFIG_VIDEO_LOGO
        /* Plot the logo and get start point of console */
        debug("Video: Drawing the logo ...\n");
        video_console_address = video_logo();

Third, the logo is centered

Modify drivers/video/cfb_console.c, modify in the function static void *video_logo(void):

static void *video_logo(void)
{
    
    
...
	splash_get_pos(&video_logo_xpos, &video_logo_ypos);
	/*
	*增加代码，设置图片居中显示
	*/
	if(video_logo_xpos && video_logo_ypos)
	{
    
    
		video_logo_xpos= (VIDEO_VISIBLE_COLS - BMP_LOGO_WIDTH)>>1;
		video_logo_ypos= (VIDEO_VISIBLE_ROWS - BMP_LOGO_HEIGHT)>>1;
	}
 
#ifdef CONFIG_SPLASH_SCREEN

Fourth, the version information of the uboot startup interface is hidden

drivers/video/cfb_console.cComment out #ifndef CONFIG_HIDE_LOGO_VERSIONthe code below to hide the version information of uboot.

#ifndef CONFIG_HIDE_LOGO_VERSION
	// space = (VIDEO_LINE_LEN / 2 - VIDEO_INFO_X) / VIDEO_FONT_WIDTH;
	// len = strlen(info);

	// if (len > space) {
    
    
	// 	video_drawchars(VIDEO_INFO_X, VIDEO_INFO_Y,
	// 			(uchar *) info, space);
	// 	video_drawchars(VIDEO_INFO_X + VIDEO_FONT_WIDTH,
	// 			VIDEO_INFO_Y + VIDEO_FONT_HEIGHT,
	// 			(uchar *) info + space, len - space);
	// 	y_off = 1;
	// } else
	// 	video_drawstring(VIDEO_INFO_X, VIDEO_INFO_Y, (uchar *) info);

#ifdef CONFIG_CONSOLE_EXTRA_INFO