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From: Qu Wenruo <>
Subject: [PATCH] distro_bootcmd: change the default dtb search path to include default kernel dtbs directory
Date: Fri, 17 Sep 2021 19:02:35 +0800	[thread overview]
Message-ID: <> (raw)

When booting using U-boot -> systemd-boot (EFI payload) -> kernel on
RK3399, systemd-boot by some bug can't execute its "devicetree" key
correctly to load its proper dtb from files.

In that case, it will use fallback dtb from U-boot, which can be
out-of-date, and on RK3399, even the latest U-boot contains out-of-date
dtb which can cause problems like invalid opp tables.

And for systemd-boot, it doesn't provide any board specific dtb, but
completely relies on the EFI environment provided by U-boot, thus if we
can't find a good dtb, the fallback one will be used anyway.

So this patch will workaround the problem by appending common linux dtbs
directory to the existing "efi_dtb_prefixes" so that for systemd-boot it
can use the existing fdt and boot properly.

Signed-off-by: Qu Wenruo <>
 include/config_distro_bootcmd.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/config_distro_bootcmd.h b/include/config_distro_bootcmd.h
index 2627c2a6a541..4ec87483eb65 100644
--- a/include/config_distro_bootcmd.h
+++ b/include/config_distro_bootcmd.h
@@ -151,7 +151,7 @@
 		"load ${devtype} ${devnum}:${distro_bootpart} "           \
 			"${fdt_addr_r} ${prefix}${efi_fdtfile}\0"         \
-	"efi_dtb_prefixes=/ /dtb/ /dtb/current/\0"                        \
+	"efi_dtb_prefixes=/ /dtb/ /dtb/current/ /dtbs/ /dtbs/current/\0"  \
 	"scan_dev_for_efi="                                               \
 		"setenv efi_fdtfile ${fdtfile}; "                         \
 		BOOTENV_EFI_SET_FDTFILE_FALLBACK                          \

             reply	other threads:[~2021-09-17 11:03 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-17 11:02 Qu Wenruo [this message]
2021-09-17 11:34 ` [PATCH] distro_bootcmd: change the default dtb search path to include default kernel dtbs directory Mark Kettenis
2021-09-17 11:42   ` Qu Wenruo
2021-09-17 14:25     ` Mark Kettenis
2021-09-17 14:29       ` Qu Wenruo

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