OK3568 4.19.206 Implementing Logo Animation Effects

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Copyright

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Revision History

Date	Version	Revision History
04/08/2022	V1.0	Initial Version

Implementing Logo Animation Effects

Prepare Files: A sequence of images for the boot animation.

If the format is PNG:

pngtopnm logo.png > logo.pnm converted to pnm

IIf the format is BMP:

bmptopnm logo.bmp > logo.pnm converted to pnm

Then execute:

pnmquant 224 logo.pnm > logo224.pnm

pnmtoplainpnm logo224.pnm > logo_linux_clut224.ppm

to generate the required PPM format files.

Copy the generated PPM file to the directory OK3568-linux-source/kernel/drivers/video/logo/

Rename it to end with “_clut224.ppm”.

Modify Makefile.

Modify logo.c.

Modify OK3568-linux-source/kernel/include/linux/linux_logo.h.

Modify OK3568-linux-source/arch/arm64/configs/OK3568-C-linux_defconfig to enable the kernel logo.

diff –git a/arch/arm64/configs/OK3568-C-linux_defconfig b/arch/arm64/configs/OK3568-C-linux_defconfig

index 97d46ceff..d5af9f21d 100644

— a/arch/arm64/configs/OK3568-C-linux_defconfig

@@ -590,3 +590,45 @@ CONFIG_RCU_CPU_STALL_TIMEOUT=60

CONFIG_FUNCTION_TRACER=y

CONFIG_BLK_DEV_IO_TRACE=y

CONFIG_LKDTM=y

+

+#

+# Console display driver support

+#

+CONFIG_FONT_8x8=n

+CONFIG_VGA_CONSOLE=y

+CONFIG_DUMMY_CONSOLE=y

+CONFIG_DUMMY_CONSOLE_COLUMNS=80

+CONFIG_DUMMY_CONSOLE_ROWS=25

+CONFIG_FRAMEBUFFER_CONSOLE=y

+CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y

+# CONFIG_FRAMEBUFFER_CONSOLE_ROTATION is not set

+# CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER is not set

+CONFIG_LOGO=y

+CONFIG_LOGO_LINUX_MONO=n

+CONFIG_LOGO_LINUX_VGA16=n

+CONFIG_LOGO_LINUX_CLUT224=y

+CONFIG_SOUND=y

+CONFIG_SND=y

+CONFIG_SND_TIMER=y

+CONFIG_SND_PCM=y

+CONFIG_SND_PCM_ELD=y

+CONFIG_SND_PCM_IEC958=y

+CONFIG_SND_SEQ_DEVICE=y

+CONFIG_SND_COMPRESS_OFFLOAD=y

+CONFIG_SND_JACK=y

+CONFIG_SND_JACK_INPUT_DEV=y

+# CONFIG_SND_OSSEMUL is not set

+CONFIG_SND_PCM_TIMER=y

+CONFIG_SND_HRTIMER=y

+CONFIG_SND_DYNAMIC_MINORS=y

+CONFIG_SND_MAX_CARDS=32

+# CONFIG_SND_SUPPORT_OLD_API is not set

+CONFIG_SND_PROC_FS=y

+CONFIG_SND_VERBOSE_PROCFS=y

+# CONFIG_SND_VERBOSE_PRINTK is not set

+# CONFIG_SND_DEBUG is not set

+CONFIG_SND_DMA_SGBUF=y

+CONFIG_SND_SEQUENCER=y

+CONFIG_SND_SEQ_DUMMY=y

+CONFIG_SND_SEQ_HRTIMER_DEFAULT=y

+CONFIG_SND_DRIVERS=y

Modify OK3568-linux-source/kernel/drivers/video/fbdev/core/fbcon.c

OK3568-linux-source/kernel/drivers/video/fbdev/core/fbmem.c

Adjust logo position and continuous display

diff –git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c

index bf7959fdf..2607ac9cb 100644

— a/drivers/video/fbdev/core/fbcon.c

@@ -569,6 +569,7 @@ static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,

    if (fb_get_color_depth(&info->var, &info->fix) == 1)

            erase &= ~0x400;

    logo_height = fb_prepare_logo(info, ops->rotate);

  logo_height += (info->var.yres / 2) - (logo_height / 2);
      
  logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
      
  q = (unsigned short *) (vc->vc_origin +
      
                          vc->vc_size_row * rows);

@@ -2037,6 +2038,8 @@ static int fbcon_resize(struct vc_data *vc, unsigned int width,

    return 0;

}

+extern int fb_get_logo(struct fb_info *info, int rotate);

+

static int fbcon_switch(struct vc_data *vc)

{

    struct fb_info *info, *old_info = NULL;

@@ -2158,7 +2161,14 @@ static int fbcon_switch(struct vc_data *vc)

            logo_shown = fg_console;

            /* This is protected above by initmem_freed */

          fb_show_logo(info, ops->rotate);

          //fb_show_logo(info, ops->rotate);

+#if 1

```
          for(i = 0; i < 25; i++){
```

                  fb_get_logo(info, i);

                  fb_show_logo(info, ops->rotate);

                  msleep(50);//Sleep 50 ms as the switching interval for displaying pictures

```
          }
```

+#endif

            update_region(vc,

                          vc->vc_origin + vc->vc_size_row * vc->vc_top,

                          vc->vc_size_row * (vc->vc_bottom -

diff –git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c

index 7a70e7b80..63cfad4c0 100644

— a/drivers/video/fbdev/core/fbmem.c

@@ -509,10 +509,10 @@ static int fb_show_logo_line(struct fb_info *info, int rotate,

            fb_set_logo(info, logo, logo_new, fb_logo.depth);

    }

```
  image.dx = 0;
```

  image.dy = y;
      
  image.width = logo->width;
      
  image.height = logo->height;

  image.dx = (info->var.xres / 2) - (logo->width / 2);

  image.dy = (info->var.yres / 2) - (logo->height / 2);

if (rotate) {
logo_rotate = kmalloc_array(logo->width, logo->height,

@@ -681,12 +681,25 @@ int fb_show_logo(struct fb_info *info, int rotate)

    return y;

}

+

+int fb_get_logo(struct fb_info *info, int num)

+{

  int depth = fb_get_color_depth(&info->var, &info->fix);

```
  depth |= num << 16;
```
```
  fb_logo.logo = fb_find_logo(depth);
```
```
  if(!fb_logo.logo) {
```
```
          return -1;
```
```
  }
```
```
  return 0;
```

+}

#else

int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; }

int fb_show_logo(struct fb_info *info, int rotate) { return 0; }

+int fb_get_logo(struct fb_info *info, int rotate) { return 0; }

#endif /* CONFIG_LOGO */

EXPORT_SYMBOL(fb_prepare_logo);

EXPORT_SYMBOL(fb_show_logo);

+EXPORT_SYMBOL(fb_get_logo);

static void *fb_seq_start(struct seq_file *m, loff_t *pos)

{

Modify Ok3568-linux-source/kernel/drivers/video/fbdev/core/bitblit.c and remove the cursor

iff –git a/drivers/video/fbdev/core/bitblit.c b/drivers/video/fbdev/core/bitblit.c

index 436365efa..e8e874653 100644

— a/drivers/video/fbdev/core/bitblit.c

@@ -373,7 +373,8 @@ static void bit_cursor(struct vc_data *vc, struct fb_info *info, int mode,

    if (info->fbops->fb_cursor)

            err = info->fbops->fb_cursor(info, &cursor);

```
  if (err)
```

```
  //if (err)
```

  if (0)
      
          soft_cursor(info, &cursor);

ops->cursor_reset = 0;

Refer to https://blog.csdn.net/qq_37596943/article/details/127976078