[PATCH] kernel-fit-image.bbclass: Fix operation with KERNEL_DTBVENDORED = "1"

[Marek Vasut <marek.vasut@mailbox.org>]

In the case KERNEL_DTBVENDORED = "1" , the fitImage configuration
subnode names used to contain the vendor prefix in OE 5.0 , e.g.:
"
$ mkimage  -l fitImage
...
 Configuration 0 (conf-freescale_imx8mn-board.dtb)
                       ^^^^^^^^^^
...
"

With OE 6.0 this is no longer the case and KERNEL_DTBVENDORED = "1"
and KERNEL_DTBVENDORED = "0" behave exactly the same way:
"
$ mkimage  -l fitImage
...
 Configuration 0 (conf-imx8mn-board.dtb)
...
"

Users depend on the correct configuration subnode names as those
are used in the U-Boot "bootm" command when booting fitImages.

Fix this by converting each entry in the KERNEL_DEVICETREE list
into the configuration subnode name by replacing all of its path
separators with underscores.

Fixes: 05d0c7342d76 ("kernel-fit-image.bbclass: add a new FIT image implementation")
Signed-off-by: Marek Vasut <marek.vasut@mailbox.org>
---
Cc: Adrian Freihofer <adrian.freihofer@siemens.com>
Cc: Richard Purdie <richard.purdie@linuxfoundation.org>
Cc: Yoann Congal <yoann.congal@smile.fr>
---
NOTE: This should ideally be added into OE 6.0 too
---
 meta/classes-recipe/kernel-fit-image.bbclass | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/meta/classes-recipe/kernel-fit-image.bbclass b/meta/classes-recipe/kernel-fit-image.bbclass
index ae8f3c66883..7bdb367151a 100644
--- a/meta/classes-recipe/kernel-fit-image.bbclass
+++ b/meta/classes-recipe/kernel-fit-image.bbclass
@@ -94,6 +94,13 @@ python do_compile() {
         for dtb in kernel_devicetree.split():
             # In deploy_dir the DTBs are without sub-directories also with KERNEL_DTBVENDORED = "1"
             dtb_name = os.path.basename(dtb)
+            # With vendored DTs, use the DT name as listed in KERNEL_DEVICETREE
+            # and replace any path separators with underscores, this behaves the
+            # same way as KERNEL_DTBVENDORED = "1" did in OE 5.0 and older.
+            if d.getVar('KERNEL_DTBVENDORED') == "1":
+                conf_name = dtb.replace('/', '_')
+            else:
+                conf_name = dtb_name
 
             # Skip DTB if it's also provided in EXTERNAL_KERNEL_DEVICETREE directory
             if external_kernel_devicetree:
@@ -103,7 +110,7 @@ python do_compile() {
 
             # Copy the dtb or dtbo file into the FIT image assembly directory
             shutil.copyfile(os.path.join(kernel_deploydir, dtb_name), dtb_name)
-            root_node.fitimage_emit_section_dtb(dtb_name, dtb_name,
+            root_node.fitimage_emit_section_dtb(conf_name, dtb_name,
                 d.getVar("UBOOT_DTB_LOADADDRESS"), d.getVar("UBOOT_DTBO_LOADADDRESS"))
 
     if external_kernel_devicetree:
-- 
2.53.0