rk3399 u-boot修改开机logo以及开机动画和开机视频
首先分析了一下uboot启动流程中的一部分代码，如下
第一部分：开机logo（下面代码分析排版有点乱，可以忽略）
1.
board_late_init //rk33xx.c
board/rockchip/rk33xx/rk33xx.c:238: board_fbt_preboot();
board_late_init
board_fbt_preboot(); //fastboot.c
1. if (gd->fdt_blob) {
int node = fdt_path_offset(gd->fdt_blob, "/display-subsystem");//找到display-subsystem这个noded,在rk3399-android.dtsi中指定为有效。
if (!fdt_device_is_available(gd->fdt_blob, node) || node < 0) {
#if defined(CONFIG_LCD)
g_is_new_display = 0;
node = fdt_path_offset(gd->fdt_blob, "/fb");
g_logo_on_state = fdtdec_get_int(gd->fdt_blob, node, "rockchip,uboot-logo-on", 0);
if (g_logo_on_state != 0) {
lcd_enable_logo(true);
drv_lcd_init();//drv_lcd_init
}
#else
drv_lcd_init：
drv_lcd_init();//drv_lcd_init //lcd.c
lcd_init(lcd_base); //lcd.c
lcd_ctrl_init(lcdbase);//rockchip_fb.c
rk_lcdc_init(panel_info.lcdc_id);
rk_lcdc_load_screen(&panel_info);
........
vop_config_timing(vop_dev, screen);//vop
h_total = hsync_len + left_margin + x_res + right_margin;
v_total = vsync_len + upper_margin + y_res + lower_margin;
val = V_DSP_HS_END(hsync_len) | V_DSP_HTOTAL(h_total);
vop_msk_reg(vop_dev, DSP_HTOTAL_HS_END, val);
val = V_DSP_HACT_END(hsync_len + left_margin + x_res) |
V_DSP_HACT_ST(hsync_len + left_margin);
vop_msk_reg(vop_dev, DSP_HACT_ST_END, val);
if (screen->mode.vmode & FB_VMODE_INTERLACED) {
/* First Field Timing */
val = V_DSP_VS_END(vsync_len) |
V_DSP_VTOTAL(2 * (vsync_len + upper_margin +
lower_margin) + y_res + 1);
vop_msk_reg(vop_dev, DSP_VTOTAL_VS_END, val);
val = V_DSP_VACT_END(vsync_len + upper_margin + y_res / 2) |
V_DSP_VACT_ST(vsync_len + upper_margin);
vop_msk_reg(vop_dev, DSP_VACT_ST_END, val);
/* Second Field Timing */
vs_st_f1 = vsync_len + upper_margin + y_res / 2 + lower_margin;
vs_end_f1 = 2 * vsync_len + upper_margin + y_res / 2 +
lower_margin;
val = V_DSP_VS_ST_F1(vs_st_f1) | V_DSP_VS_END_F1(vs_end_f1);
vop_msk_reg(vop_dev, DSP_VS_ST_END_F1, val);
vact_end_f1 = 2 * (vsync_len + upper_margin) + y_res +
lower_margin + 1;
vact_st_f1 = 2 * (vsync_len + upper_margin) + y_res / 2 +
lower_margin + 1;
val = V_DSP_VACT_END_F1(vact_end_f1) |
V_DSP_VACT_ST_F1(vact_st_f1);
vop_msk_reg(vop_dev, DSP_VACT_ST_END_F1, val);
vop_msk_reg(vop_dev, DSP_CTRL0,
V_DSP_INTERLACE(1) | V_DSP_FIELD_POL(0));
val = V_DSP_LINE_FLAG_NUM_0(lower_margin ?
vact_end_f1 : vact_end_f1 - 1);
val |= V_DSP_LINE_FLAG_NUM_1(lower_margin ?
vact_end_f1 : vact_end_f1 - 1);
vop_msk_reg(vop_dev, LINE_FLAG, val);
}else
...........
vop_vop_post_cfg(vop_dev, screen);
.........
post_dsp_vact_st = screen->post_dsp_sty / 2 +
screen->mode.vsync_len +
screen->mode.upper_margin;
post_dsp_vact_end = post_dsp_vact_st +
screen->post_ysize / 2;
.........
val = V_DSP_HACT_END_POST(post_dsp_hact_end) |
V_DSP_HACT_ST_POST(post_dsp_hact_st);
vop_msk_reg(vop_dev, POST_DSP_HACT_INFO, val);
val = V_DSP_VACT_END_POST(post_dsp_vact_end) |
V_DSP_VACT_ST_POST(post_dsp_vact_st);
........
lcd_clear();
lcd_enable();2.
2. rockchip_display_init()
fdt_path_offset(blob, "/display-subsystem/route"); //寻找route node.
fdt_device_is_available //查看route是否是okay的
init_display_buffer //获取fb地址
fdt_for_each_subnode //依次解析route下的子节点，当前用的edp，所以只解析route_edp节点。
fdt_node_offset_by_phandle //获取connect node.
find_crtc_node//获取对应的ctrl node.
rockchip_get_crtc //根据ctrl node从g_crtc数组中找到具体的元素，这里compatible是"rockchip,rk3399-vop-big"，在rk3399.dtsi中定义
find_connector_node //获取对应的connector node
rockchip_get_connector //根据connector node从g_connector数组中找到具体的元素，这里compatible是"rockchip,rk3399-edp"，在rk3399.dtsi中定义
malloc(sizeof(*s)); //display相关信息都放在struct display_state *s中
fdt_get_string(blob, child, "logo,uboot", &s->ulogo_name); //分别获取uboot/kernel中的logo name以及模式
fdt_get_string(blob, child, "logo,kernel", &s->klogo_name);
fdt_get_string(blob, child, "logo,mode", &name);
connector_phy_init //无phy node，3368平台需要配置。
connector_panel_init ->
get_panel_node //获取edp panel node
rockchip_get_panel //根据panel node从g_panel数组中找到具体型号panel，因此要添加一块新panel，那么对应timing信息需要添加到此数组中
connector_pclist_parse_dt //解析电源控制节点power_ctr，即lcd的enable以及reset gpio.
rockchip_panel_init ->
panel->funcs->init ->
panel_simple_init ->
panel_simple_parse_dt -> //此函数参数解析针对mipi屏
gpio_direction_output(enable_gpio->gpio, !!(enable_gpio->flags & OF_GPIO_ACTIVE_LOW)); //初始化之前先关屏
rk_pwm_bl_config(0); //关背光3.
3. rockchip_show_logo();
list_for_each_entry(s, &rockchip_display_list, head) {
s->logo.mode = s->logo_mode;
if (load_bmp_logo(&s->logo, s->ulogo_name))//获取图片，提取bpp、width、height这些信息
printf("failed to display uboot logo\n");
else
display_logo(s);//display_logo
if (load_bmp_logo(&s->logo, s->klogo_name))
printf("failed to display kernel logo\n");
}
display_logo(s);//display_logo
........
display_init(state);
display_get_timing(state);
printf("Using display timing dts\n");
........
display_set_plane(state);
display_enable(state);4.
4. lcd_standby(0);//使能
if (enable == 0) {
rk32_dsi_enable();5.
5. rk_pwm_bl_config(-1);//背光6.修改：找一张bmp格式的图片，替换kernel下的logo.bmp图片即可
第二部分：开机动画，先看一个函数，文件位置：源码目录下\frameworks\base\cmds\bootanimation\bootanimation.cpp
bool BootAnimation::threadLoop()
{
bool r;
//add for boot video function
mStartbootanimaTime = 0;
mBootVideoTime = -1;
if (mVideoAnimation){
r = video();
} else {
// We have no bootanimation file, so we use the stock android logo
// animation.
if (mZipFileName.isEmpty()) {
r = android();//这个地方显示动画，其实我也不是很懂这个东西，这个是framework那一层的东西，不过我试验过后发现就是这个地方对开机动画的处理
} else {
r = movie();
}
}
eglMakeCurrent(mDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
eglDestroyContext(mDisplay, mContext);
eglDestroySurface(mDisplay, mSurface);
mFlingerSurface.clear();
mFlingerSurfaceControl.clear();
eglTerminate(mDisplay);
IPCThreadState::self()->stopProcess();
return r;
}接下来在该文件顶部可以看到这么一段代码
namespace android {
static const char OEM_BOOTANIMATION_FILE[] = "/oem/media/bootanimation.zip";
static const char SYSTEM_BOOTANIMATION_FILE[] = "/system/media/bootanimation.zip";//经试验，上面这两个是和开机动画相关的东西
static const char SYSTEM_SHUTDOWNANIMATION_FILE[] = "/system/media/shutdownanimation.zip";
static const char SYSTEM_ENCRYPTED_BOOTANIMATION_FILE[] = "/system/media/bootanimation-encrypted.zip";
//support boot video
static const char DATA_BOOTVIDEO_FILE[] = "/data/local/bootanimation.ts";
static const char SYSTEM_BOOTVIDEO_FILE[] = "/system/media/bootanimation.ts";
static const char SYSTEM_DATA_DIR_PATH[] = "/data/system";
static const char SYSTEM_TIME_DIR_NAME[] = "time";
static const char SYSTEM_TIME_DIR_PATH[] = "/data/system/time";
static const char CLOCK_FONT_ASSET[] = "images/clock_font.png";
static const char CLOCK_FONT_ZIP_NAME[] = "clock_font.png";
static const char LAST_TIME_CHANGED_FILE_NAME[] = "last_time_change";
static const char LAST_TIME_CHANGED_FILE_PATH[] = "/data/system/time/last_time_change";
static const char ACCURATE_TIME_FLAG_FILE_NAME[] = "time_is_accurate";
static const char ACCURATE_TIME_FLAG_FILE_PATH[] = "/data/system/time/time_is_accurate";
static const char TIME_FORMAT_12_HOUR_FLAG_FILE_PATH[] = "/data/system/time/time_format_12_hour";
// Java timestamp format. Don't show the clock if the date is before 2000-01-01 00:00:00.
static const long long ACCURATE_TIME_EPOCH = 946684800000;
static constexpr char FONT_BEGIN_CHAR = ' ';
static constexpr char FONT_END_CHAR = '~' + 1;
static constexpr size_t FONT_NUM_CHARS = FONT_END_CHAR - FONT_BEGIN_CHAR + 1;
static constexpr size_t FONT_NUM_COLS = 16;
static constexpr size_t FONT_NUM_ROWS = FONT_NUM_CHARS / FONT_NUM_COLS;
static const int TEXT_CENTER_VALUE = INT_MAX;
static const int TEXT_MISSING_VALUE = INT_MIN;
static const char EXIT_PROP_NAME[] = "service.bootanim.exit";
static const char LOOP_COMPLETED_PROP_NAME[] = "sys.anim_loop.completed";
static const char PLAY_SOUND_PROP_NAME[] = "persist.sys.bootanim.play_sound";
static const int ANIM_ENTRY_NAME_MAX = 256;
static constexpr size_t TEXT_POS_LEN_MAX = 16;
static const char BOOT_COMPLETED_PROP_NAME[] = "sys.boot_completed";
static const char BOOTREASON_PROP_NAME[] = "ro.boot.bootreason";
// bootreasons list in "system/core/bootstat/bootstat.cpp".
static const std::vector PLAY_SOUND_BOOTREASON_BLACKLIST {
"kernel_panic",
"Panic",
"Watchdog",
}; 上面的代码里边注意这么一句：
static const char SYSTEM_BOOTANIMATION_FILE[] = "/system/media/bootanimation.zip";这里的/system/media/bootanimation.zip就是开机动画相关的文件，下面我以bootanimation.zip这个为例，里边有几个文件夹：part0、part1........很多个文件，这里边是一个动画的每一帧对应的图片，所谓开机动画，不过就是把这些图片连续的显示出来，该文件夹下面还有一个文件很重要，desc.txt，内容如下：
580 152 60//580 152 是分辨率，60是指每秒播放帧数
c 1 30 part0//c 1 30 part0 1表示part0循环一次，0表示无限循环 30是时间间隔
c 1 0 part1
c 0 0 part2
c 1 64 part3
c 1 15 part4
关于这个文件可以参考一下这篇文章：https://www.cnblogs.com/lialong1st/p/8984586.html
接下来，找一个能够被编译进系统的 .mk文件，增加一点内容：如下
PRODUCT_COPY_FILES += \
device/rockchip/rk3399/rk3399_64/ddr_config.xml:system/etc/ddr_config.xml \
device/rockchip/rk3399/rk3399_64/video_status:system/etc/video_status \
device/rockchip/rk3399/g3399/gslX680.idc:system/usr/idc/gslX680.idc \
device/rockchip/rk3399/bootanimation.zip:system/media/bootanimation.zip\ //追加的内容冒号前边是.zip的路径，.zip文件与.mk文件在同一目录下边，这里我的.mk文件就是device/rockchip/rk3399/g3399.mk
device/rockchip/rk3399/g3399/libquectel-ril.so:/system/lib64/libquectel-ril.so
这里新增的内容就是把：前面的文件拷贝到后面的文件里
如此，编译好，烧写到开发板就ok,关于bootanimation就自行百度吧，上面的图片格式是有所要求的，大小不能太大，这个是试验时发现的问题，还是建议用视频开机动画，方便又省事。
开机视频这部分需要修改/device/rockchip/rk3399_mid/system.prop，如果不行的话，找一下其他文件夹里边的system.prop ，我这儿懒得验证，于是在同目录下的g3399下的system.prop下也添加了同样的内容
#enable bootvideo
persist.sys.bootvideo.enable=true
persist.sys.bootvideo.showtime=10原因：
bool BootAnimation::threadLoop()
{
bool r;
//add for boot video function
mStartbootanimaTime = 0;
mBootVideoTime = -1;
if (mVideoAnimation){
r = video();//播放视频
} else {
// We have no bootanimation file, so we use the stock android logo
// animation.
if (mZipFileName.isEmpty()) {
r = android();
} else {
r = movie();
}
}
eglMakeCurrent(mDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
eglDestroyContext(mDisplay, mContext);
eglDestroySurface(mDisplay, mSurface);
mFlingerSurface.clear();
mFlingerSurfaceControl.clear();
eglTerminate(mDisplay);
IPCThreadState::self()->stopProcess();
return r;
}video：
property_get("persist.sys.bootvideo.enable",decrypt, "false");//这儿就是为什么要添加上边的内容的原因
char value[PROPERTY_VALUE_MAX];
property_get("persist.sys.bootvideo.showtime", value, "-1");
if(mVideoFile != NULL && !strcmp(decrypt, "true") &&(atoi(value)!=0)) {
mVideoAnimation = true;
}else{
ALOGD("bootvideo:No boot video animation,EXIT_VIDEO_NAME:%s,bootvideo.showtime:%s\n",decrypt,value);
}
参考文章：https://blog.csdn.net/ooonebook/article/details/53206623（uboot阶段对dts的处理 fdt_xxx_xxx等函数说明）
https://blog.csdn.net/kris_fei/article/details/79003925
http://dev.t-firefly.com/thread-185-1-1.html