The fdt_simplefb.c APIs rely on video-uclass APIs and structures to fill/update framebuffer information, so compile it only when VIDEO Kconfig is enabled, as otherwise below warning can be seen if VIDEO Kconfig is disabled:

"boot/fdt_simplefb.c:96:12: warning: fdt_simplefb_enable_existing_node defined but not used [-Wunused-function] 96 | static int fdt_simplefb_enable_existing_node(void *blob)"

Reported-by: Mattijs Korpershoek mkorpershoek@baylibre.com Signed-off-by: Devarsh Thakkar devarsht@ti.com Reviewed-by: Mattijs Korpershoek mkorpershoek@baylibre.com --- boot/Kconfig | 1 + 1 file changed, 1 insertion(+)

diff --git a/boot/Kconfig b/boot/Kconfig index de277d2ba50d..56f2bb59a1e5 100644 --- a/boot/Kconfig +++ b/boot/Kconfig @@ -1583,6 +1583,7 @@ config FDT_FIXUP_PARTITIONS

config FDT_SIMPLEFB bool "FDT tools for simplefb support" + depends on VIDEO help Enable the fdt tools to manage the simple fb nodes in device tree. These functions can be used by board to indicate to the OS

Update simple-framebuffer device-tree node by enumerating framebuffer related information in existing simple-framebuffer node in Linux device-tree file and enabling it.

In case there is no simple-framebuffer stub detected in Linux kernel device-tree and video is still active, then update the device-tree to reserve the framebuffer region for the active splash screen.

This helps preserve the splash screen till the display server takes over after OS is booted.

Signed-off-by: Devarsh Thakkar devarsht@ti.com --- board/ti/am62x/evm.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+)

diff --git a/board/ti/am62x/evm.c b/board/ti/am62x/evm.c index 9bdd0223cdb6..be0447f6e9ea 100644 --- a/board/ti/am62x/evm.c +++ b/board/ti/am62x/evm.c @@ -16,6 +16,7 @@ #include <cpu_func.h> #include <k3-ddrss.h> #include <fdt_support.h> +#include <fdt_simplefb.h> #include <asm/io.h> #include <asm/arch/hardware.h> #include <dm/uclass.h> @@ -162,3 +163,23 @@ void spl_perform_fixups(struct spl_image_info *spl_image) #endif } #endif + +#if defined(CONFIG_OF_BOARD_SETUP) +int ft_board_setup(void *blob, struct bd_info *bd) +{ + int ret = -1; + + if (IS_ENABLED(CONFIG_FDT_SIMPLEFB)) + ret = fdt_simplefb_enable_and_mem_rsv(blob); + + /* If simplefb is not enabled and video is active, then at least reserve + * the framebuffer region to preserve the splash screen while OS is booting + */ + if (IS_ENABLED(CONFIG_VIDEO) && IS_ENABLED(CONFIG_OF_LIBFDT)) { + if (ret && video_is_active()) + return fdt_add_fb_mem_rsv(blob); + } + + return 0; +} +#endif