TDA4VM: [TDA4] SPI/SPI_DEV usage issue on on TDA4/J721E

Yongsig Do said:

I applied the patch in the above link and enable CONFIG_SPI_SPIDEV=y explicitly in arch/arm64/configs/tisdk_j7-evm_defconfig.

In the file arch/arm64/configs/tisdk_j7-evm_defconfig

There will be a commented line like below:

#CONFIG_SPI_SPIDEV is not set

Change that to

CONFIG_SPI_SPIDEV=y

Also since you are using the file system in SD card. Do the change below:

Open the file $PSDK/Rules.make

Assign DESTDIr=/media/yongsig/rootfs

Then execute the command:

sudo make linux_install

The above steps will ensure that Image/dtb is directly copied to your rootfs. Let me know if this helps. If it does then click on verify answer.

Best Regards,
Keerthy

Hi Keerthy

I have already changed to CONFIG_SPI_SPIDEV=y in arch/arm64/configs/tisdk_j7-evm_defconfig but It doesn't work.

CONFIG_SPI_SPIDEV is set to y in the deconfig file in the same directory.

After make linux_install, I checked up-to-date files in targetNFS/boot/ directory.

After changing DESDir to /media/yongsig/rootfs, some error occurs as below.

yongsig-vb@yongsigvb-VirtualBox:~/build_server/workspace/TDA4x/psdkla_7.3$ sudo make linux_install
=======================================
Installing the Linux Kernel DTBs
=======================================
install -d /media/yongsig-vb/rootfs/boot
install: cannot stat '/board-support/linux-5.4.106+gitAUTOINC+023faefa70-g023faefa70/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dtb': No such file or directory
install: cannot stat '/board-support/linux-5.4.106+gitAUTOINC+023faefa70-g023faefa70/arch/arm64/boot/dts/ti/k3-j721e-proc-board-tps65917.dtb': No such file or directory
install: cannot stat '/board-support/linux-5.4.106+gitAUTOINC+023faefa70-g023faefa70/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board-infotainment.dtbo': No such file or directory
install: cannot stat '/board-support/linux-5.4.106+gitAUTOINC+023faefa70-g023faefa70/arch/arm64/boot/dts/ti/k3-j721e-pcie-backplane.dtbo': No such file or directory
install: cannot stat '/board-support/linux-5.4.106+gitAUTOINC+023faefa70-g023faefa70/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board-jailhouse.dtbo': No such file or directory
install: cannot stat '/board-support/linux-5.4.106+gitAUTOINC+023faefa70-g023faefa70/arch/arm64/boot/dts/ti/k3-j721e-vision-apps.dtbo': No such file or directory
install: cannot stat '/board-support/linux-5.4.106+gitAUTOINC+023faefa70-g023faefa70/arch/arm64/boot/dts/ti/k3-j721e-pcie-backplane.dtbo': No such file or directory
Makefile:114: recipe for target 'linux-dtbs_install' failed
make: *** [linux-dtbs_install] Error 1

So I went back to the previous definition.

As I mentioned I just copied boot directory to the SD card after make linux_intall.

Please Let me know which files I should copy more.

Best regards

Yongsig

Hi Yongsig,

Can you just make sure that CONFIG_SPI_SPIDEV is present only once in the file arch/arm64/configs/tisdk_j7-evm_defconfig.

cd $PSDK/board-support/linux*

cp arch/arm64/boot/Image arch/arm64/boot/dts/ti/k3-j721-common-proc-board.dtb /media/yongsig/rootfs/boot

Regrads.
Keerthy

Hi Keerthy

Thanks for your reply.

CONFIG_SPI_SPIDEV is set only once /psdkla_7.3/board-support/linux-5.4.106+gitAUTOINC+023faefa70-g023faefa70/arch/arm64/configs/tisdk_j7-evm_defconfig.

After copying arch/arm64/boot/Image again (not archived directory form make linux_install),

It works well. I thought 'make linux_install' updated the new Image to the archived directory.

To the next step.

spi_dev build was failed. Is the CROSS_COMPILE=aarch64-none-linux-gnu- right?

I tried three options to CROSS_COMPILE.

1. make ARCH=arm64 CROSS_COMPILE=aarch64-none-linux-gnu- --> FAIL
2. make ARCH=arm64 CROSS_COMPILE=/home/yongsig/workspace/TDA4x/psdkla_7.3/linux-devkit/sysroots/x86_64-arago-linux/usr/bin/aarch64-none-linux-gnu- --> FAIL
3. make ARCH=arm64 --> SUCCESS

Build logs are below.

yongsig@builder:~/workspace/TDA4x/psdkla_7.3/board-support/linux-5.4.106+gitAUTOINC+023faefa70-g023faefa70/tools/spi$ make ARCH=arm64 CROSS_COMPILE=aarch64-none-linux-gnu-
make -f /home/yongsig/workspace/TDA4x/psdkla_7.3/board-support/linux-5.4.106+gitAUTOINC+023faefa70-g023faefa70/tools/build/Makefile.build dir=. obj=spidev_test
make[1]: Entering directory '/home/yongsig/workspace/TDA4x/psdkla_7.3/board-support/linux-5.4.106+gitAUTOINC+023faefa70-g023faefa70/tools/spi'
  CC       spidev_test.o
/bin/sh: aarch64-none-linux-gnu-gcc: command not found
/home/yongsig/workspace/TDA4x/psdkla_7.3/board-support/linux-5.4.106+gitAUTOINC+023faefa70-g023faefa70/tools/build/Makefile.build:96: recipe for target 'spidev_test.o' failed
make[1]: *** [spidev_test.o] Error 127
make[1]: Leaving directory '/home/yongsig/workspace/TDA4x/psdkla_7.3/board-support/linux-5.4.106+gitAUTOINC+023faefa70-g023faefa70/tools/spi'
Makefile:39: recipe for target 'spidev_test-in.o' failed
make: *** [spidev_test-in.o] Error 2

efa70-g023faefa70/tools/spi$ make ARCH=arm64 CROSS_COMPILE=/home/yongsig/workspace/TDA4x/psdkla_7.3/linux-devkit/sysroots/x86_64-arago-linux/usr/bin/aarch64-none-linux-gnu-
make -f /home/yongsig/workspace/TDA4x/psdkla_7.3/board-support/linux-5.4.106+gitAUTOINC+023faefa70-g023faefa70/tools/build/Makefile.build dir=. obj=spidev_test
make[1]: Entering directory '/home/yongsig/workspace/TDA4x/psdkla_7.3/board-support/linux-5.4.106+gitAUTOINC+023faefa70-g023faefa70/tools/spi'
  CC       spidev_test.o
In file included from spidev_test.c:11:
/home/yongsig/workspace/TDA4x/psdkla_7.3/linux-devkit/sysroots/x86_64-arago-linux/usr/lib/gcc/aarch64-none-linux-gnu/9.2.1/include/stdint.h:9:16: fatal error: stdint.h: No such file or directory
    9 | # include_next <stdint.h>
      |                ^~~~~~~~~~
compilation terminated.
/home/yongsig/workspace/TDA4x/psdkla_7.3/board-support/linux-5.4.106+gitAUTOINC+023faefa70-g023faefa70/tools/build/Makefile.build:96: recipe for target 'spidev_test.o' failed
make[1]: *** [spidev_test.o] Error 1
make[1]: Leaving directory '/home/yongsig/workspace/TDA4x/psdkla_7.3/board-support/linux-5.4.106+gitAUTOINC+023faefa70-g023faefa70/tools/spi'
Makefile:39: recipe for target 'spidev_test-in.o' failed
make: *** [spidev_test-in.o] Error 2

yongsig@builder:~/workspace/TDA4x/psdkla_7.3/board-support/linux-5.4.106+gitAUTOINC+023faefa70-g023faefa70/tools/spi$ make ARCH=arm64
make -f /home/yongsig/workspace/TDA4x/psdkla_7.3/board-support/linux-5.4.106+gitAUTOINC+023faefa70-g023faefa70/tools/build/Makefile.build dir=. obj=spidev_test
make[1]: Entering directory '/home/yongsig/workspace/TDA4x/psdkla_7.3/board-support/linux-5.4.106+gitAUTOINC+023faefa70-g023faefa70/tools/spi'
  CC       spidev_test.o
  LD       spidev_test-in.o
make[1]: Leaving directory '/home/yongsig/workspace/TDA4x/psdkla_7.3/board-support/linux-5.4.106+gitAUTOINC+023faefa70-g023faefa70/tools/spi'
  LINK     spidev_test
make -f /home/yongsig/workspace/TDA4x/psdkla_7.3/board-support/linux-5.4.106+gitAUTOINC+023faefa70-g023faefa70/tools/build/Makefile.build dir=. obj=spidev_fdx
make[1]: Entering directory '/home/yongsig/workspace/TDA4x/psdkla_7.3/board-support/linux-5.4.106+gitAUTOINC+023faefa70-g023faefa70/tools/spi'
  CC       spidev_fdx.o
  LD       spidev_fdx-in.o
make[1]: Leaving directory '/home/yongsig/workspace/TDA4x/psdkla_7.3/board-support/linux-5.4.106+gitAUTOINC+023faefa70-g023faefa70/tools/spi'
  LINK     spidev_fdx

And, running was failed when I executed spidev(generated from 3rd build method) on Linux.

root@j7-evm:~# ls -l /sys/class/spi*
/sys/class/spi_master:
total 0
lrwxrwxrwx 1 root root 0 Apr 10 00:05 spi6 -> ../../devices/platform/bus@100000/2160000.spi/spi_master/spi6
lrwxrwxrwx 1 root root 0 Apr 10 00:05 spi7 -> ../../devices/platform/bus@100000/bus@100000:bus@28380000/47000000.fss/47040000.spi/spi_master/spi7
lrwxrwxrwx 1 root root 0 Apr 10 00:05 spi8 -> ../../devices/platform/bus@100000/bus@100000:bus@28380000/47000000.fss/47050000.spi/spi_master/spi8

/sys/class/spidev:
total 0
lrwxrwxrwx 1 root root 0 Apr 10 00:05 spidev6.0 -> ../../devices/platform/bus@100000/2160000.spi/spi_master/spi6/spi6.0/spidev/spidev6.0
root@j7-evm:~# /spidev_test
-sh: /spidev_test: cannot execute binary file: Exec format error
root@j7-evm:~# /spidev_test -v -D /dev/spidev6.0
-sh: /spidev_test: cannot execute binary file: Exec format error
root@j7-evm:~#

Best regards

Yongsig

Hi Yongsig,

cd $PSDK/board-support/linux-*/tools/spi
make ARCH=arm64 CROSS_COMPILE=aarch64-none-linux-gnu-
cp spidev_test /media/$user/rootfs

The above steps work for me quite well.



Please compile with the CROSS_COMPILE option.

- Keerthy

Thank you for the quick response.

I tried again, but it was failed.

Which one did you use, /bin/ or $(TI_SDK_PATH)/linux-devkit/sysroots/x86_64-arago-linux/usr/bin/aarch64-none-linux-gnu- ?

There isn't aarch64-none-linux-gnu- in /bin/ of my machine.

If I didn't include any CROSS_COMPILE in the command,

I think CROSS_COMPILE is $(TI_SDK_PATH)/linux-devkit/sysroots/x86_64-arago-linux/usr/bin/aarch64-none-linux-gnu- because It was exported in Rules.mak

Right?

Best regards

Yongsig

Hi keerthy

I tried to run a sample application referenced spidev_test on Linux.

So I got the wanted result like this.

 ===============================
TEST Usecase
 ===============================

 x: Exit

 t: SPI Tx Test
 d: Display cpu load on/off


 Enter Choice: t
SPI Transfer Start.
Enter Data: hello world
TX | 68 65 6C 6C 6F 20 77 6F 72 6C 64 20 __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __  |hello world |
RX | FF FF FF FF FF FF FF FF FF FF FF FF __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __  |............|
SPI Transfer Done.

But I was wondering that It could be used for inter-communication with another core such as MCU in mcu-domain.

Also, Do you have an idea to verify, such as tx-rx loopback test?

Best regards

Yongsig.

Hi Yongsig,

Since there are no slave devices we can verify the TX part alone from Linux. Currently the above test is good enough to
validate the SPI master working with TX.

- Keerthy

Hi Keerthy

Thank you for your reply.

I will change the status to resolved after asking one more simple question.

I was wondering If I could use this SPI transfer to communicate with another core in TDA4VM.

Please let me know If this  spidev test is for external(means another board) or internal transfer.

Best regards

Yongsig.

Hi Yongsig,

I am still facing the issue for CROSS_COMPILE.

However, i tried to run " /spidev_test -v -D /dev/spidev6.0" command but its not successful.

I hope you can help me in this point.

Thanks,

Tanvi

Hi Keerthy,

Thanks for the reply.

Used this command to build spidev_test --> "make ARCH=arm64 CROSS_COMPILE=/home/linux/Chetan/ti-processor-sdk-rtos-j721e-evm-07_03_00_07/gcc-arm-9.2-2019.12-x86_64-aarch64-none-linux-gnu/bin/aarch64-none-linux-gnu-"

Thanks & Regards,

Tanvi

That looks alright. What is the error you are facing? Also share the output of:

ls -l /sys/class/spi*

Regards,
Keerthy

Hi Keerthy,

Got the following output -->

/*************************************************

/sys/class/spi_master:
total 0
lrwxrwxrwx 1 root root 0 Nov 19 18:09 spi6 -> ../../devices/platform/bus@100000/2160000.spi/spi_master/spi6
lrwxrwxrwx 1 root root 0 Nov 19 18:09 spi7 -> ../../devices/platform/bus@100000/bus@100000:bus@28380000/47000000.fss/4707
lrwxrwxrwx 1 root root 0 Nov 19 18:09 spi8 -> ../../devices/platform/bus@100000/bus@100000:bus@28380000/47000000.fss/4708

/sys/class/spi_slave:
total 0

/sys/class/spidev:
total 0
lrwxrwxrwx 1 root root 0 Nov 19 18:09 spidev6.0 -> ../../devices/platform/bus@100000/2160000.spi/spi_master/spi6/spi6.0/0

*************************************************/

And than ran the command -->  "/spidev_test -v -D /dev/spidev6.0"

Which gave output -->

/*************************************************

spi mode: 0x0
bits per word: 8
max speed: 500000 Hz (500 KHz)
TX | FF FF FF FF FF FF 40 00 00 00 00 95 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF F0 0D |......@..........|
RX | FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF |.................|

*************************************************/

Thanks & Regards,

Piyush

Can you try: /spidev_test -v -D /dev/spidev6.0 -p "HELLOWORLD"

Best Regards,
Keerthy

Hi Keerthy,

Sorry for the late reply. I followed what you asked and output i got is -->

/*******************************************************************************************************************************************************

root@j7-evm:~# /spidev_test -v -D /dev/spidev6.0 -p "HELLOWORLD"
spi mode: 0x0
bits per word: 8
max speed: 500000 Hz (500 KHz)
TX | 48 45 4C 4C 4F 57 4F 52 4C 44 __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ |HELLOWORLD|
RX | FF FF FF FF FF FF FF FF FF FF __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ |..........|

*******************************************************************************************************************************************************/

Let me know if this is the desired outcome.

Also, can we use this application to try SPI between the cores ?

Please also view this thread and if possible suggest me some answer to the query.

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1079319/tda4vm-building-ipc-spi-profiling-application-to-work-along-with-linux

Thanks  & Regards,

Tanvi