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board: stm32mp1: enable simple framebuffer node for splashscreen

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Enable an existing simple framebuffer node in the Linux kernel device
tree and the add the associated reserved memory node to preserved the
resources (clock, memory) used by the stm32 video driver to display
the splashscreen = background in exlinux.conf file.

These resources will be released by the Linux driver only when the
associated driver is ready to avoid transition issues during the Linux
kernel initialization between U-Boot splash screen and the final display.

See Linux documentation for details:
Documentation/devicetree/bindings/display/simple-framebuffer.yaml

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
This commit is contained in:
Patrick Delaunay 2021-11-15 16:32:23 +01:00 committed by Patrice Chotard
parent 6cdeb323b8
commit 8ad37e6f16
4 changed files with 7 additions and 0 deletions
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4
board/st/stm32mp1/stm32mp1.c
View file

@ -13,6 +13,7 @@
#include <dm.h>
#include <env.h>
#include <env_internal.h>
#include <fdt_simplefb.h>
#include <fdt_support.h>
#include <g_dnl.h>
#include <generic-phy.h>
@ -914,6 +915,9 @@ int ft_board_setup(void *blob, struct bd_info *bd)
if (IS_ENABLED(CONFIG_FDT_FIXUP_PARTITIONS))
fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
if (CONFIG_IS_ENABLED(FDT_SIMPLEFB))
fdt_simplefb_enable_and_mem_rsv(blob);
return 0;
}
#endif

1
configs/stm32mp15_basic_defconfig
View file

@ -34,6 +34,7 @@ CONFIG_SPL_DM_SPI_FLASH=y
CONFIG_SPL_POWER=y
CONFIG_SPL_SPI_FLASH_MTD=y
CONFIG_SYS_SPI_U_BOOT_OFFS=0x80000
CONFIG_FDT_SIMPLEFB=y
CONFIG_SYS_PROMPT="STM32MP> "
CONFIG_CMD_ADTIMG=y
CONFIG_CMD_ERASEENV=y

1
configs/stm32mp15_defconfig
View file

@ -19,6 +19,7 @@ CONFIG_SYS_LOAD_ADDR=0xc2000000
CONFIG_FIT=y
CONFIG_BOOTDELAY=1
CONFIG_BOOTCOMMAND="run bootcmd_stm32mp"
CONFIG_FDT_SIMPLEFB=y
CONFIG_SYS_PROMPT="STM32MP> "
CONFIG_CMD_ADTIMG=y
CONFIG_CMD_ERASEENV=y

1
configs/stm32mp15_trusted_defconfig
View file

@ -20,6 +20,7 @@ CONFIG_SYS_LOAD_ADDR=0xc2000000
CONFIG_FIT=y
CONFIG_BOOTDELAY=1
CONFIG_BOOTCOMMAND="run bootcmd_stm32mp"
CONFIG_FDT_SIMPLEFB=y
CONFIG_SYS_PROMPT="STM32MP> "
CONFIG_CMD_ADTIMG=y
CONFIG_CMD_ERASEENV=y