[PATCH 2/2] rpi: set the correct parameter for simple framebuffer node

Meng Li Meng.Li at windriver.com
Wed Jul 26 04:42:35 CEST 2023

When raspberrpi-4b platform  boots up, there are 2 sets of same bootup
log displayed on HDMI monitor screen, it looks like the screen is split
into 2 parts. The root cause is that video format of u-boot is different
from kernel. The fixing "a8r8g8b8" video format is used in u-boot, but
"r5g6b5" video format from framebuffer node is used in kernel image. In
order to avoid weird display status on screen, it needs to set the correct
parameter for simple framebuffer node even if it has existed.

Signed-off-by: Meng Li <Meng.Li at windriver.com>
 board/raspberrypi/rpi/rpi.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/board/raspberrypi/rpi/rpi.c b/board/raspberrypi/rpi/rpi.c
index 1057ebb994..38bcab15cf 100644
--- a/board/raspberrypi/rpi/rpi.c
+++ b/board/raspberrypi/rpi/rpi.c
@@ -561,6 +561,8 @@ int ft_board_setup(void *blob, struct bd_info *bd)
 	node = fdt_node_offset_by_compatible(blob, -1, "simple-framebuffer");
 	if (node < 0)
+	else
+		fdt_simplefb_enable_and_mem_rsv(blob);
 	/* Reserve the spin table */

More information about the U-Boot mailing list