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Buildroot显示uboot logo_buildroot如何配置启动系统带logo图片

作者：运维做开发 | 2024-07-29 14:59:56

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buildroot如何配置启动系统带logo图片

根据之前的开机现象，uboot部分没有开机logo

 1、Makefile配置

查看一下u-boot/tools/Makefile是否都有如下配置

  1. # Enable all the config-independent tools
  2. ifneq ($(HOST_TOOLS_ALL),)
  3. CONFIG_LCD_LOGO = y
  4. CONFIG_CMD_LOADS = y
  5. CONFIG_CMD_NET = y
  6. CONFIG_XWAY_SWAP_BYTES = y
  7. CONFIG_NETCONSOLE = y
  8. CONFIG_SHA1_CHECK_UB_IMG = y
  9. CONFIG_ARCH_SUNXI = y
  10. endif
  1. # Generated LCD/video logo
  2. LOGO_H = $(objtree)/include/bmp_logo.h
  3. LOGO_DATA_H = $(objtree)/include/bmp_logo_data.h
  4. LOGO-$(CONFIG_LCD_LOGO) += $(LOGO_H)
  5. LOGO-$(CONFIG_LCD_LOGO) += $(LOGO_DATA_H)
  6. LOGO-$(CONFIG_VIDEO_LOGO) += $(LOGO_H)
  7. LOGO-$(CONFIG_VIDEO_LOGO) += $(LOGO_DATA_H)
  8.  
  9. # Generic logo
  10. ifeq ($(LOGO_BMP),)
  11. LOGO_BMP= $(srctree)/$(src)/logos/denx.bmp
  12.  
  13. # Use board logo and fallback to vendor
  14. ifneq ($(wildcard $(srctree)/$(src)/logos/$(BOARD).bmp),)
  15. LOGO_BMP= $(srctree)/$(src)/logos/$(BOARD).bmp
  16. else
  17. ifneq ($(wildcard $(srctree)/$(src)/logos/$(VENDOR).bmp),)
  18. LOGO_BMP= $(srctree)/$(src)/logos/$(VENDOR).bmp
  19. endif
  20. endif
  21.  
  22. endif # !LOGO_BMP

 这些都是默认的，并没有修改，而且u-boot显示的logo在kernel/logo.bmp，文件名在kernel的dts配置

2、跑u-boot时没有检测到dsi配置

  1. boot mode: None
  2. Found DTB in boot part
  3. DTB: rk-kernel.dtb
  4. HASH(c): OK
  5. I2c0 speed: 400000Hz
  6. PMIC:  RK808
  7. vdd_center 900000 uV
  8. vdd_cpu_l 900000 uV
  9. vdd_log 1100000 uV
  10. I2c8 speed: 100000Hz
  11. panel_i2c_reg_read fail, i = 0  reg = 80 ret = -121
  12. panel_i2c_reg_read fail, i = 1  reg = 80 ret = -121
  13. panel_i2c_reg_read fail, i = 2  reg = 80 ret = -121
  14. panel_i2c_reg_read fail, i = 3  reg = 80 ret = -121
  15. panel_i2c_reg_read fail, i = 0  reg = 4 ret = -121
  16. panel_i2c_reg_read fail, i = 1  reg = 4 ret = -121
  17. panel_i2c_reg_read fail, i = 2  reg = 4 ret = -121
  18. panel_i2c_reg_read fail, i = 3  reg = 4 ret = -121
  19. rockchip_display_probe rpi_buffer=-121  powertip_buffer=-121
  20. rockchip_display_probe: no dsi panel connected
  21. Could not find baseparameter partition
  22. Model: ASUS Tinker Board 2/2S
  23. read_bmp_header:BMP singature incorrectly 0x9d 0x27load_bmp_logo  42 4d bit_count=8 width=258 height=94 file_size=2d40
  24. Rockchip UBOOT DRM driver version: v1.0.1
  25. hdmi@ff940000 disconnected

 在网上有些源码没有这段代码，先把continue屏蔽一下，继续往下跑

  1. diff --git a/drivers/video/drm/rockchip_display.c b/drivers/video/drm/rockchip_display.c
  2. index 6fcedcdfe6..a70bc02087 100644
  3. --- a/drivers/video/drm/rockchip_display.c
  4. +++ b/drivers/video/drm/rockchip_display.c
  5. @@ -507,6 +507,7 @@ static int display_get_timing_from_dts(struct panel_state *panel_state,
  6.         struct rockchip_panel *panel = panel_state->panel;
  7.         int phandle;
  8.         ofnode timing, native_mode;
  9. +       printf("rpi_panel_connected=%d, powertip_panel_connected=%d\n", rpi_panel_connected, powertip_panel_connected);
  10.  
  11.         timing = dev_read_subnode(panel->dev, "display-timings");
  12.         if (rpi_panel_connected) {
  13. @@ -1776,8 +1777,11 @@ static int rockchip_display_probe(struct udevice *dev)
  14.                 return -ENODEV;
  15.  
  16.         ofnode_for_each_subnode(node, route_node) {
  17. -               if (!ofnode_is_available(node))
  18. +               if (!ofnode_is_available(node)) {
  19. +                       printf("rockchip_display_probe node.np->name=%s is not available\n", node.np->name);
  20.                         continue;
  21. +               }
  22. +               printf("rockchip_display_probe node.np->name=%s\n", node.np->name);
  23.                 if (!strncmp(node.np->name, "route-dsi", 9)) {
  24.                         struct udevice *powertip_dev;
  25.                         struct udevice *rpi_dev;
  26. @@ -1789,7 +1793,7 @@ static int rockchip_display_probe(struct udevice *dev)
  27.  
  28.                         i2c_get_chip_for_busnum(0x8, 0x36, 1, &powertip_dev);//powertip
  29.                         powertip_buffer = panel_i2c_reg_read(powertip_dev, 0x4);
  30. -                       printf("rockchip_display_probe rpi_buffer=%d  powertip_buffer=%d\n",rpi_buffer, powertip_buffer);
  31. +                       printf("rockchip_display_probe rpi_buffer=%x  powertip_buffer=%x\n",rpi_buffer, powertip_buffer);
  32.  
  33.                         if (rpi_buffer == 0xDE  || rpi_buffer == 0xC3) {
  34.                                 rpi_panel_connected = true;
  35. @@ -1799,7 +1803,7 @@ static int rockchip_display_probe(struct udevice *dev)
  36.  
  37.                         if (!powertip_panel_connected && !rpi_panel_connected) {
  38.                                         printf("rockchip_display_probe: no dsi panel connected\n");
  39. -                                       continue;
  40. +                                       //continue;
  41.                         }
  42.                 }
  43.

 3、dw_mipi_dsi.c

  1. rockchip_display_probe node.np->name=route-hdmi
  2. rockchip_display_probe node.np->name=route-dsi
  3. I2c8 speed: 100000Hz
  4. panel_i2c_reg_read fail, i = 0  reg = 80 ret = -121
  5. panel_i2c_reg_read fail, i = 1  reg = 80 ret = -121
  6. panel_i2c_reg_read fail, i = 2  reg = 80 ret = -121
  7. panel_i2c_reg_read fail, i = 3  reg = 80 ret = -121
  8. panel_i2c_reg_read fail, i = 0  reg = 4 ret = -121
  9. panel_i2c_reg_read fail, i = 1  reg = 4 ret = -121
  10. panel_i2c_reg_read fail, i = 2  reg = 4 ret = -121
  11. panel_i2c_reg_read fail, i = 3  reg = 4 ret = -121
  12. rockchip_display_probe rpi_buffer=ffffff87  powertip_buffer=ffffff87
  13. rockchip_display_probe: no dsi panel connected
  14. panel_i2c_reg_read fail, i = 0  reg = 80 ret = -121
  15. panel_i2c_reg_read fail, i = 1  reg = 80 ret = -121
  16. panel_i2c_reg_read fail, i = 2  reg = 80 ret = -121
  17. panel_i2c_reg_read fail, i = 3  reg = 80 ret = -121
  18. panel_i2c_reg_read fail, i = 0  reg = 4 ret = -121
  19. panel_i2c_reg_read fail, i = 1  reg = 4 ret = -121
  20. panel_i2c_reg_read fail, i = 2  reg = 4 ret = -121
  21. panel_i2c_reg_read fail, i = 3  reg = 4 ret = -121
  22.  dw_mipi_dsi_child_pre_probe rpi_buffer=-121  powertip_buffer=-121
  23. rockchip_display_probe node.np->name=route-edp is not available
  24. Could not find baseparameter partition
  25. Model: ASUS Tinker Board 2/2S
  26. read_bmp_header:BMP singature incorrectly 0x9d 0x27load_bmp_logo  42 4d bit_count=8 width=258 height=94 file_size=2d40
  27. Rockchip UBOOT DRM driver version: v1.0.1
  28. hdmi@ff940000 disconnected
  29. rpi_panel_connected=0, powertip_panel_connected=1
  30. Using display timing dts
  31. dsi@ff960000:  detailed mode clock 66800 kHz, flags[a]
  32.     H: 0720 0728 0783 0838
  33.     V: 1280 1288 1308 1328
  34. bus_format: 100e
  35. final DSI-Link bandwidth: 504 Mbps x 2
  36. panel_simple_prepaer

看log跑到了dw_mipi_dsi_child_pre_probe

对powertip_buffer的判断不完整导致获取到的timing参数不对，屏幕显示如下

修改powertip_buffer的判断

  1. diff --git a/drivers/video/drm/dw_mipi_dsi.c b/drivers/video/drm/dw_mipi_dsi.c
  2. index 370948a3c8..2c17939363 100644
  3. --- a/drivers/video/drm/dw_mipi_dsi.c
  4. +++ b/drivers/video/drm/dw_mipi_dsi.c
  5. @@ -1732,7 +1732,7 @@ static int dw_mipi_dsi_child_pre_probe(struct udevice *dev)
  6.                 device->lanes = 1;
  7.                 device->format = MIPI_DSI_FMT_RGB888;
  8.                 device->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |MIPI_DSI_MODE_LPM;
  9. -       } else if ((powertip_buffer & 0xF0) == 0x80) {
  10. +       } else if ((powertip_buffer > 0) && (powertip_buffer & 0xF0) == 0x80) {
  11.                 powertip_panel_connected = true;
  12.                 powertip_id = powertip_buffer;
  13.                 device->lanes = 2;

4、运行正常

buildroot显示uboot logo

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