linux-xlnx_2021.1.bb: Setting DT_SEARCH_ARG to look for dtbs only

With fpgamanager distro feature enabled, pl-final.dtbo, pl.dtbo, and
system-top.dtb are created. with recent changes in core, kernel-fitimage
class now considers dtbos when creating the fit image. additionally the
artifacts in EXTERNAL_KERNEL_DEVICETREE are sorted for reproducibility,
so pl-final.dtbo is picked to be the default dtb which causes issues on
bootup of the image.
Note: there is a dtbcount mechanism to be able to manually set a
numbered default, but this is not reliable (as well as raises error:
"Properties must precede subnodes" in our case)

Setting DT_SEARCH_ARG to go back to only processing dtbs when putting
together the fitimage.

Signed-off-by: Jaewon Lee <jaewon.lee@xilinx.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/meta-xilinx-bsp/recipes-kernel/linux/linux-xlnx_2021.1.bb b/meta-xilinx-bsp/recipes-kernel/linux/linux-xlnx_2021.1.bb
index 40fcd0e6..8c888407 100644
--- a/meta-xilinx-bsp/recipes-kernel/linux/linux-xlnx_2021.1.bb
+++ b/meta-xilinx-bsp/recipes-kernel/linux/linux-xlnx_2021.1.bb
@@ -6,6 +6,8 @@ include linux-xlnx.inc
 
 FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
 
+DT_SEARCH_ARG="-name *.dtb"
+
 fitimage_assemble() {
         kernelcount=1
         dtbcount=""