[PATCH v4 13/13] doc: board/qualcomm: Update RDP build instructions

[Varadarajan Narayanan]

Add details about the SPL & U-Boot proper build steps, converting to
flashable images, source URLs for the needed binaries and scripts.

Signed-off-by: Varadarajan Narayanan <varadarajan.narayanan at oss.qualcomm.com>
---
v4: Replace script based image creation with binman based command

v3: Use '-' for sub heading instead of '='
    Add location for template.its and sort the list alphabetically
---
 doc/board/qualcomm/rdp.rst | 83 +++++++++++++++++++++++++++++++++++++-
 1 file changed, 82 insertions(+), 1 deletion(-)

diff --git a/doc/board/qualcomm/rdp.rst b/doc/board/qualcomm/rdp.rst
index 99cf8eba57c..354dc9d06e1 100644
--- a/doc/board/qualcomm/rdp.rst
+++ b/doc/board/qualcomm/rdp.rst
@@ -42,17 +42,98 @@ on your device with::
 
 U-Boot should be running after a reboot (``reset``).
 
+Build steps for IPQ5210 based Qualcomm Dragonwing F8 & N8 Platforms:
+--------------------------------------------------------------------
+
+Please refer to the following URLs for more details about the platforms.
+
+	F8: https://www.qualcomm.com/networking-infrastructure/products/f-series/f8-platform
+
+	N8: https://www.qualcomm.com/networking-infrastructure/products/n-series/n8-platform
+
+1. Since U-Boot SPL is enabled on these platforms, the build command generates
+   both the U-Boot SPL and U-Boot proper images. Assuming ${uboot_dir} is the
+   top of the U-Boot sources and ${out_dir} as the output directory,
+
+	$ cd ${uboot_dir}
+	$ export CROSS_COMPILE=<aarch64 toolchain prefix>
+	$ make -j8 O=${out_dir} qcom_ipq5210_mmc_defconfig
+	$ make -j8 O=${out_dir}
+
+   U-Boot SPL image:	${out_dir}/spl/u-boot-spl.wrap-elf
+   U-Boot image:	${out_dir}/u-boot.elf
+
+2. Convert the SPL image to multi ELF
+
+	$ cd ${out_dir}/spl
+	$ python elftombn.py -f u-boot-spl.wrap-elf -o u-boot-spl.mbn -v7
+	$ python `create_multielf.py` -f u-boot-spl.mbn,tmel-ipq52xx-patch.elf \
+					-o u-boot-spl.melf
+
+   This u-boot-spl.melf should be flashed into 0:SPL partition.
+   Please see below for the location of `tmel-ipq52xx-patch.elf`
+
+3. Convert the U-Boot image to bootloader image
+
+	$ cd ${out_dir}
+	$ python elftombn.py -f u-boot.elf -o u-boot.mbn -v7
+
+   The u-boot.mbn has to be combined with `qc_config.elf`, `QCLib.elf`, `TFA`
+   and `OPTEE`. Please see below for the location for these ELFs. TFA and OPTEE
+   can be built from the sources using the following commands
+
+   TFA:
+	$ make PLAT=ipq52xx QTISECLIB_PATH=path/to/`libqtisec_dbg.a` SPD=opteed
+
+   OPTEE:
+	$ make PLATFORM=qcom-ipq52xx -j16
+
+   These binaries can be combined into a flashable image using binman.
+
+   Assuming all the required binaries are available in ${uboot_dir}/binman
+
+	$ export bm=${uboot_dir}/binman
+	$ cd ${bm}
+	$ ${uboot_dir}/tools/binman/binman			\
+		--toolpath ${uboot_dir}/tools build		\
+		-u						\
+		-d ${out_dir}/u-boot.dtb			\
+		-O ${bm}.out					\
+		-I ${uboot_dir}					\
+		-I ${bm}					\
+		-I ${uboot_dir}/board				\
+		-I ${out_dir}/dts/upstream/src/arm64		\
+		-a of-list="qcom/ipq5210-rdp504"		\
+		-a atf-bl31-path=${bm}/bl31.mbn			\
+		-a tee-os-path=${bm}/tee-pager_v2.mbn		\
+		-a qcom-config-path=${bm}/qc_config.elf		\
+		-a qcom-lib-path=${bm}/QCLib.elf		\
+		-a qcom-appsbl-path=${out_dir}/u-boot.mbn	\
+		-a default-dt="qcom/ipq5210-rdp504"		\
+		-a spl-bss-pad=1				\
+		-a spl-dtb=y					\
+		-a of-spl-remove-props="interrupt-parent interrupts"
+
+   This should be flashed into 0:BOOTLDR partition.
+
 .. WARNING
 	Boards with newer software versions would automatically go the emergency
 	download (EDL) mode if U-Boot is not functioning as expected. If its a
 	runtime failure at Uboot, the system will get reset (due to watchdog)
 	and XBL will try to boot from next bank and if Bank B also doesn't have
 	a functional image and is not booting fine, then the system will enter
-	EDL.  A tool like bkerler's `edl`_ can be used for flashing with the
+	EDL.  A tool like bkerler's `edl` can be used for flashing with the
 	firehose loader binary appropriate for the board.
 
 	Note that the support added is very basic. Restoring the original U-Boot
 	on boards with older version of the software requires a debugger.
 
+.. _create_multielf.py: https://raw.githubusercontent.com/coreboot/coreboot/refs/heads/main/util/qualcomm/create_multielf.py
 .. _elftombn.py: https://git.codelinaro.org/clo/qsdk/oss/system/tools/meta/-/tree/NHSS.QSDK.13.0.5.r2/scripts?ref_type=heads
 .. _edl: https://github.com/bkerler/edl
+.. _libqtisec_dbg.a: https://softwarecenter.qualcomm.com/nexus/generic/product/chip/software-product/IPQ5210.NLQ.14.0/ipq5210.nlq.14.0-qca-oem-qartifact/r00036.1/WIN.TFA.1.0.R4/apss_proc/out/proprietary/qtiseclib/output/ipq52xx/release/libqtisec_dbg.a
+.. _OPTEE: https://git.codelinaro.org/clo/trusted-firmware/optee_os/optee_os/-/tree/win.optee.1.0?ref_type=heads
+.. _qc_config.elf: https://softwarecenter.qualcomm.com/nexus/generic/product/chip/software-product/IPQ5210.NLQ.14.0/ipq5210.nlq.14.0-qca-oem-qartifact/r00036.1/BOOT.MXF.2.3.1.1/boot_images/boot/QcomPkg/SocPkg/Hermosa/Bin/LC/RELEASE/qc_config.elf
+.. _QCLib.elf: https://softwarecenter.qualcomm.com/nexus/generic/product/chip/software-product/IPQ5210.NLQ.14.0/ipq5210.nlq.14.0-qca-oem-qartifact/r00036.1/BOOT.MXF.2.3.1.1/boot_images/boot/QcomPkg/SocPkg/Hermosa/Bin/LC/RELEASE/QCLib.elf
+.. _TFA: https://git.codelinaro.org/clo/trusted-firmware/tf-a/trusted-firmware-a/-/tree/win.tfa.1.0.r4?ref_type=heads
+.. _tmel-ipq52xx-patch.elf: https://softwarecenter.qualcomm.com/nexus/generic/product/chip/software-product/IPQ5210.NLQ.14.0/ipq5210.nlq.14.0-qca-oem-qartifact/r00036.1/TMEL.WNS.2.4/tmel-ipq52xx-patch.elf
-- 
2.34.1