[u-boot] logo background color setting

此logo背景色在圖中所使用比例最高
再由 bmp_logo_bitmap 判定0x24為背景色
在對應至 bmp_logo_palette 可得知0x24 is 0x0FFF

out/uboot/include/bmp_logo_data.h

unsigned short bmp_logo_palette[] = {

 0x0000,  0x0FFF,  0x0666,  0x0666,  0x0FFF,  0x0666,  0x0666,  0x0F00,

 0x0F00,  0x0FFF,  0x0FFF,  0x0F00,  0x0666,  0x0666,  0x0000,  0x0F00,

 0x0666,  0x0666,  0x0E11,  0x0F00,  0x0FFF,  0x0FFF,  0x0F00,  0x0FFF,

 ...

 }

unsigned char bmp_logo_bitmap[] = {

 0x24, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24,

 0x24, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24,

 0x24, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24,

 ...

 }

經過下列運算,可得知背景色為 0xf0

uboot-imx/drivers/video/cfb_console.c

for (i = 0; i < VIDEO_LOGO_COLORS; i++) {

 logo_red[i] = (bmp_logo_palette[i] & 0x0f00) >> 4;

 logo_green[i] = (bmp_logo_palette[i] & 0x00f0);

 logo_blue[i] = (bmp_logo_palette[i] & 0x000f) << 4;

}

在此處如果 *CONFIG_SYS_CONSOLE_FG_COL* & *CONFIG_SYS_CONSOLE_BG_COL*
皆有定義,則會使用所定義之 背景/前景 顏色填入

uboot-imx/include/video_fb.h

#if defined(CONFIG_SYS_CONSOLE_FG_COL) && defined(CONFIG_SYS_CONSOLE_BG_COL)

#define CONSOLE_BG_COL            CONFIG_SYS_CONSOLE_BG_COL

#define CONSOLE_FG_COL            CONFIG_SYS_CONSOLE_FG_COL

#else

#define CONSOLE_BG_COL            0x00

#define CONSOLE_FG_COL            0xa0

#endif

因此我在project.h加入下方的定義,來完成背景色的填充

#define CONFIG_SYS_CONSOLE_FG_COL 0xa0
#define CONFIG_SYS_CONSOLE_BG_COL 0xf0