most: apply conditional backport patch for kernels older than 4.13

This patch makes the recipe apply a backport patch on systems
running a kernel older than 4.13.
It is needed to avoid build errors due to API changes.

v2 (jsmoeller): rewrite as KERNEL_VERSION is not available at parsing stage
                This requires quite some plumbing and the maxkver (and minkver) should
                probably go upstream.
                For now we draft this up here as a bbappend.

Change-Id: I48f75f6e98c7b6b4e92b6e43bc3743a5ec3fbbf7
Signed-off-by: Christian Gromm <christian.gromm@microchip.com>
Signed-off-by: Jan-Simon Möller <jsmoeller@linuxfoundation.org>

diff --git a/meta-agl-profile-core/recipes-kernel/most/most.bbappend b/meta-agl-profile-core/recipes-kernel/most/most.bbappend
index d85565f..4ebcba8 100644 (file)
--- a/meta-agl-profile-core/recipes-kernel/most/most.bbappend
+++ b/meta-agl-profile-core/recipes-kernel/most/most.bbappend
@@ -1,7 +1,21 @@
 FILESEXTRAPATHS_prepend := "${THISDIR}/files:"
 
+def prep_version (d) :
+       KV = d.getVar('KERNEL_VERSION', True)
+       if not KV :
+               return "4.12"
+       else:
+               return KV
+
+ORIG_KERN_VER = "${@prep_version(d)}"
+
+VANILLA_KERNEL_VERSION = "${@str(ORIG_KERN_VER.split("-")[0].split(".")[0]+ORIG_KERN_VER.split("-")[0].split(".")[1])}"
+
+APPLY = "${@str('no' if ${VANILLA_KERNEL_VERSION} > 412 else 'yes')}"
+
 SRC_URI_append = " \
-           file://0002-src-most-add-auto-conf-feature.patch \ 
+           file://0001-most-aim-network-backport-Kernel-API.patch;apply=${APPLY} \
+           file://0002-src-most-add-auto-conf-feature.patch \
            file://0003-core-remove-kernel-log-for-MBO-status.patch \
            file://0004-most-video-set-device_caps.patch \
            file://0005-most-video-set-V4L2_CAP_DEVICE_CAPS-flag.patch \
@@ -10,3 +24,5 @@ SRC_URI_append = " \
            file://0008-dim2-read-clock-speed-from-the-device-tree.patch \
            file://0009-dim2-use-device-for-coherent-memory-allocation.patch \
           "
+# Make sure we can expose KERNEL_VERSION ...
+do_patch[depends] = "virtual/kernel:do_populate_sysroot"