imx-vpu-hantro: fix build issue

The source code uses LINUX_VERSION_CODE at many places which constraints
the package to be built with a toolchain whose headers match the kernel.

This is a far from ideal solution, especially if one wants to use a
prebuilt toolchain (with unknown kernel header version).

So change the CFLAGS to consider the kernel build folder so that the
Linux version test actually matches the kernel built.

Signed-off-by: Gary Bisson <gary.bisson@boundarydevices.com>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>

2 files changed, 48 insertions, 1 deletions

diff --git a/recipes-bsp/imx-vpu-hantro/imx-vpu-hantro/0002-Fix-version.h-inclusion-to-be-from-kernel-build-fold.patch b/recipes-bsp/imx-vpu-hantro/imx-vpu-hantro/0002-Fix-version.h-inclusion-to-be-from-kernel-build-fold.patch
new file mode 100644
index 00000000..e9bf9257
--- /dev/null
+++ b/recipes-bsp/imx-vpu-hantro/imx-vpu-hantro/0002-Fix-version.h-inclusion-to-be-from-kernel-build-fold.patch
@@ -0,0 +1,44 @@
+From 1d7b7046c8f735e150e92aeace3fe6d0686b9bc9 Mon Sep 17 00:00:00 2001
+From: Gary Bisson <gary.bisson@boundarydevices.com>
+Date: Wed, 3 Oct 2018 10:52:29 +0200
+Subject: [PATCH] Fix version.h inclusion to be from kernel build folder
+
+Instead of relying on Toolchain headers which can be from newer kernel.
+
+Signed-off-by: Gary Bisson <gary.bisson@boundarydevices.com>
+---
+ Makefile_G1G2 | 3 +++
+ Makefile_H1   | 3 +++
+ 2 files changed, 6 insertions(+)
+
+diff --git a/Makefile_G1G2 b/Makefile_G1G2
+index 29866a4..c473bcb 100755
+--- a/Makefile_G1G2
++++ b/Makefile_G1G2
+@@ -16,6 +16,9 @@ INCLUDE_HEADERS += -I$(LINUX_KERNEL_ROOT)/include/uapi -I$(LINUX_KERNEL_ROOT)/in
+ # ION header location
+ INCLUDE_HEADERS += -I$(LINUX_KERNEL_ROOT)/drivers/staging/android/uapi
+ 
++# LINUX_VERSION_CODE from kernel build folder instead of toolchain headers
++INCLUDE_HEADERS += -I$(LINUX_KERNEL_BUILD)/include/generated/uapi
++
+ CFLAGS += -DDEC_MODULE_PATH=\"/dev/mxc_hantro\" -DUSE_FAKE_RFC_TABLE -DFIFO_DATATYPE=void* -DNDEBUG -DDOWN_SCALER \
+            -DUSE_EXTERNAL_BUFFER -DUSE_FAST_EC -DUSE_VP9_EC -DGET_FREE_BUFFER_NON_BLOCK \
+            -DDEC_X170_OUTPUT_FORMAT=0 -DDEC_X170_TIMEOUT_LENGTH=-1 -DENABLE_HEVC_SUPPORT \
+diff --git a/Makefile_H1 b/Makefile_H1
+index 56b4332..0be43ce 100755
+--- a/Makefile_H1
++++ b/Makefile_H1
+@@ -23,6 +23,9 @@ ENV += -I$(SDKTARGETSYSROOT)/usr/imx/include
+ # ION header location
+ ENV += -I$(LINUX_KERNEL_ROOT)/drivers/staging/android/uapi
+ 
++# LINUX_VERSION_CODE from kernel build folder instead of toolchain headers
++INCLUDE_HEADERS += -I$(LINUX_KERNEL_BUILD)/include/generated/uapi
++
+ LIBENCNAME = libcodec_enc
+ LIBSENC = -L./ -lhantro_h1 -lpthread
+ 
+-- 
+2.19.0
+
diff --git a/recipes-bsp/imx-vpu-hantro/imx-vpu-hantro_1.8.0.bb b/recipes-bsp/imx-vpu-hantro/imx-vpu-hantro_1.8.0.bb
index 243f1f35..b5fc8468 100644
--- a/recipes-bsp/imx-vpu-hantro/imx-vpu-hantro_1.8.0.bb
+++ b/recipes-bsp/imx-vpu-hantro/imx-vpu-hantro_1.8.0.bb
@@ -12,6 +12,7 @@ PROVIDES = "virtual/imxvpu"
 SRC_URI = " \
     ${FSL_MIRROR}/${PN}-${PV}.bin;fsl-eula=true \
     file://0001-Fix-ion.h-header-inclusion-to-be-standard.patch \
+    file://0002-Fix-version.h-inclusion-to-be-from-kernel-build-fold.patch \
 "
 SRC_URI[md5sum] = "140796ddd6f1be47cffb7e5e2bfe0fb6"
 SRC_URI[sha256sum] = "c092a5b0f8897bae54154f58e47b6d2de033da01ee231a8cd779a51bbe962606"
@@ -24,7 +25,9 @@ PLATFORM_mx8mm = "IMX8MM"
 PLATFORM_mx8mq = "IMX8MQ"
 
 do_compile () {
-    oe_runmake CROSS_COMPILE="${HOST_PREFIX}" LINUX_KERNEL_ROOT="${STAGING_KERNEL_DIR}" SDKTARGETSYSROOT="${STAGING_DIR_TARGET}" PLATFORM="${PLATFORM}" all
+    oe_runmake CROSS_COMPILE="${HOST_PREFIX}" LINUX_KERNEL_BUILD="${STAGING_KERNEL_BUILDDIR}" \
+        LINUX_KERNEL_ROOT="${STAGING_KERNEL_DIR}" SDKTARGETSYSROOT="${STAGING_DIR_TARGET}" \
+        PLATFORM="${PLATFORM}" all
 }
 
 do_install () {