[RK3288] [Android6.0] about Uboot logo related Knowledge point summary "Turn"

This article was reproduced from: http://blog.csdn.net/kris_fei/article/details/76256224

Platform:rockchip
Os:android 6.0
kernel:3.10.92

Met many netizens can not find Uboot logo where, in fact, initially I also subconsciously go to u-boot directory down to find, but later found in the kernel directory

Load Order:
1.uboot boot will first go to the logo partition loading
2. Load failure attempts to load from the resource partition
3. Load failure attempts to load from boot partition

Limitations:
1. Only even resolution can be displayed
2. Can only display a bit deep 8bit bmp picture
3. Input is 24bit picture

Production:
#convert -compress rle -colors 256 src.bmp logo.bmp

Compile:
Replace after compilation in Resource.img or Boot.img (with resource.img in the case)

Code calls:

int Rk_bitmap_from_resource (Unsignedshort* FB) {Constchar* File_path ="Logo.bmp";Return Show_resource_image (File_path)?0:-1;}BOOL Show_resource_image (Constchar* image_path) {BOOL ret =False#ifdef CONFIG_LCD bmp_image_t *bmp = NULL;Const disk_partition_t* PTN = get_disk_partition (logo_name); Resource_content image;memset (&image,0,sizeof (image));snprintf (Image.path,sizeof (Image.path),"%s", image_path);if (PTN) {printf"Find logo from partition%s\n", logo_name);#ifdef Config_direct_logo bmp = Lcd_get_buffer ();#else bmp = (void *) gd->arch.rk_boot_buf_addr;#endif read_storage (Ptn->start, BMP, Config_max_bmp_blocks); Debug"BMP image at 0x%p, sign:%c%c\n", BMP, bmp->header.signature[0], bmp->header.signature[1]); }if (PTN && bmp && bmp->header.signature[0] = =' B ' && bmp->header.signature[1] = =' M ') {debug ("%s:show logo.bmp from Logo partition\n", __func__); Lcd_display_bitmap_center ((uint32_t) (UnsignedLong) BMP); RET =True }else {if (Get_content (0, &image)) {Debug ("%s:show logo from resource or boot partition\n", __func__);int blocks = (image.content_size + block_size-1)/block_size;if (Image.content_size > Config_rk_boot_buffer_size) {fbterr ("Failed to BMP image too large,%d\n", image.content_size);ReturnFalse } #ifdef Config_direct_logo image.load_addr = Lcd_get_buffer ();  #else image.load_addr = (void *) Gd->arch.rk_boot_buf_addr; #endif if (!load_content_data (&image, 0, IMAGE.LOAD_ADDR, blocks)) {return FALSE;} fbtdbg ( "Try to show:%s\n", image_path); Lcd_display_bitmap_center ((uint32_t) (unsigned long) image.load_addr); ret = true;} else {fbterr ( #endif return ret;}       

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Reference:
Rockchip Uboot Development Guide _v3.7

[RK3288] [Android6.0] about Uboot logo related Knowledge point summary "Turn"