From: Patrick Delaunay <patrick.delaunay@foss.st.com>
Date: Mon, 15 Nov 2021 15:32:23 +0000 (+0100)
Subject: board: stm32mp1: enable simple framebuffer node for splashscreen
X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=8ad37e6f16d5d58128f1ca8eb2038ab89880d23e;p=u-boot.git

board: stm32mp1: enable simple framebuffer node for splashscreen

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>
---

diff --git a/board/st/stm32mp1/stm32mp1.c b/board/st/stm32mp1/stm32mp1.c
index 84592677e4..45f2ca81a6 100644
--- a/board/st/stm32mp1/stm32mp1.c
+++ b/board/st/stm32mp1/stm32mp1.c
@@ -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
diff --git a/configs/stm32mp15_basic_defconfig b/configs/stm32mp15_basic_defconfig
index 2cc26d4066..c9ed2239ca 100644
--- a/configs/stm32mp15_basic_defconfig
+++ b/configs/stm32mp15_basic_defconfig
@@ -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
diff --git a/configs/stm32mp15_defconfig b/configs/stm32mp15_defconfig
index 7b844a3e46..36ebeb4470 100644
--- a/configs/stm32mp15_defconfig
+++ b/configs/stm32mp15_defconfig
@@ -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
diff --git a/configs/stm32mp15_trusted_defconfig b/configs/stm32mp15_trusted_defconfig
index 270cbaa733..63eeb50719 100644
--- a/configs/stm32mp15_trusted_defconfig
+++ b/configs/stm32mp15_trusted_defconfig
@@ -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