Toshiba TC358743 Linux driver for Tegra X1

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TC358743 features

Reference: Toshiba TC358743 bridge chip

The Toshiba TC358743 is an HDMI 1.4 to MIPI CSI-2 1.01 bridge chip capable of handling video data up to 1080P at 60 fps.

* Tested resolutions are 640x480, 720x480, 1280x720, 1920x1080. Tested format is UYVY.
* The TC358743 driver supports 2 and 4 lanes configuration for the given resolutions.

Source code

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Build Driver

Build kernel using Jetpack 2.3.1

1. In a browser, navigate to:, Locate and download the L4T Sources (L4T Sources 24.2.1 2016/11/21). Also, you can use wget command:


2. Copy L4T kernel sources into DEVDIR.

cp sources_r24.2.1.tbz2 $DEVDIR

3. Expand tarball file.

tar -vxjf sources_r24.2.1.tbz2
# Decompress kernel
cd sources/
tar -xjf kernel_src.tbz2
cd ..

4. Download tc358743-r24.2.1-j106.tar.gz file and apply the patches.

tar -xzvf tc358743-r24.2.1-j106.tar.gz
quilt push -a

5. Compile the kernel. Specify the path to the toolchain and architecture: (see

export CROSS_COMPILE=/opt/linaro/gcc-linaro-5.3-2016.02-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu-
export CROSS32CC=/opt/linaro/gcc-linaro-5.3-2016.02-x86_64_arm-linux-gnueabihf/bin/arm-linux-gnueabihf-gcc
export ARCH=arm64

6. Define and create destination directories.

export TEGRA_KERNEL_OUT=/home/$USER/JetPack-L4T-2.3.1/64_TX1/Linux_for_Tegra_64_tx1/sources_tc358743/images
export TEGRA_MODULES_OUT=/home/$USER/JetPack-L4T-2.3.1/64_TX1/Linux_for_Tegra_64_tx1/sources_tc358743/modules

7. Configure your kernel

make -C kernel_source O=$TEGRA_KERNEL_OUT tegra21_defconfig
make -C kernel_source menuconfig

8. Configure your kernel

make -C kernel_source O=$TEGRA_KERNEL_OUT tegra21_defconfig

8. Enable driver

make -C kernel_source O=$TEGRA_KERNEL_OUT menuconfig

Select the driver. The menu option is located:

-> Device Drivers
  -> Multimedia support (MEDIA_SUPPORT [=y])
    -> Encoders, decoders, sensors and other helper chips
       <*> Toshiba TC358743 decoder

9. Compile kernel, device tree and modules. To speed up compilation on multiprocessor systems, use -j n, this option tells make to execute many recipes simultaneously.

make -C kernel_source O=$TEGRA_KERNEL_OUT zImage
make -C kernel_source O=$TEGRA_KERNEL_OUT dtbs
make -C kernel_source O=$TEGRA_KERNEL_OUT modules
make -C kernel_source O=$TEGRA_KERNEL_OUT modules_install INSTALL_MOD_PATH=$TEGRA_MODULES_OUT

Test your Kernel image using Jetpack 2.3.1 root file system

1. Go to Linux_for_Tegra_64_tx1 directory. Let's call $JETPACKDIR the path where you installed your development directory or Jetpack.

cd $JETPACKDIR/64_TX1/Linux_for_Tegra_64_tx1/

2. Put the board into force USB Recovery Mode:

1. Power down the device. If connected, remove the AC adapter from the device. The device must be
powered OFF, and not in a suspend or sleep state.
2. Connect the Micro-B plug on the USB cable to the Recovery (USB Micro-B) Port on the device and
the other end to an available USB port on the host PC.
3. Connect the power adapter to the device.
4. Press POWER button
5. Press and hold the RECOVERY FORCE (REC) button.
6. While pressing the RECOVERY FORCE button, press and release the RESET button.
7. Wait 2 seconds and release the RECOVERY FORCE button

3. Use ./ in order to configure TX1 board, Also this script configures jetpack rootfs to be used as SD filesystem. Execute the script as follows:

sudo ./ jetson-tx1 mmcblk1p1

4. Create ext4 partition called "rootfs".

 sudo mkfs.ext4 /dev/mmcblk0p1 -L "rootfs"

5. Copy rootfs from jetpack 2.3.1

sudo cp -a $JETPACKDIR/64_TX1/Linux_for_Tegra_tx1/rootfs/* /media/$USER/rootfs/

6. Copy kernel image, device tree, and modules.

sudo cp -a arch/arm64/boot/Image /media/$USER/rootfs/boot/Image 
sudo cp -a arch/arm64/boot/dts/tegra210-jetson-tx1-p2597-2180-a01-devkit.dtb /media/$USER/rootfs/boot/tegra210-jetson-tx1-p2597-2180-a01-devkit.dtb
sudo cp -a lib/* /media/$USER/rootfs/lib/

7. Unmount the device and Put the SD into the TX1 board, and boot the board.

umount /media/$USER/rootfs 

8. Check kernel version. At this moment you can test the image created in order to see the new kernel is working correctly. You have to see a new kernel version:

uname -a
Linux tegra-ubuntu 3.10.96+ #1 SMP PREEMPT Tue May 2 14:08:05 CST 2017 aarch64 aarch64 aarch64 GNU/Linux


You can see that the driver is proved, execute the line: dmesg | grep "(Tegra I2C adapter)"

Expected output:

ubuntu@tegra-ubuntu:~$ dmesg | grep "(Tegra I2C adapter)"
[    4.554634] tc358743 0-000f: tc358743 found @ 0xf (Tegra I2C adapter)
[    4.665076] tc358743 2-000f: tc358743 found @ 0xf (Tegra I2C adapter)
[    4.727283] tc358743 2-000d: tc358743 found @ 0xd (Tegra I2C adapter)
[    4.843073] tc358743 6-000f: tc358743 found @ 0xf (Tegra I2C adapter)
[    4.907802] tc358743 6-000d: tc358743 found @ 0xd (Tegra I2C adapter)

NoteIn this case, I have connected 5 devices in J106 ports. The output varies slightly when 6 devices are connected.

I have 5 video devices created:

ls /dev/video*
/dev/video0  /dev/video2  /dev/video3  /dev/video4  /dev/video5



Yavta (Yet Another V4L2 Test Application) can be used for testing the driver, according to the input video resolution:

./yavta /dev/video0 -c1 -n1 -s640x480 -Ftest1.raw
./yavta /dev/video0 -c1 -n1 -s1280x720 -Ftest2.raw
./yavta /dev/video0 -c1 -n1 -s1920x1080 -Ftest3.raw

Also Raw pixels can be used for visualizing the captured frame.


720p@60 autovideosink

gst-launch-1.0 v4l2src device=/dev/video0 ! 'video/x-raw,format=I420,width=1280,height=720' ! \
perf !  nvvidconv ! autovideosink sync=false

720p@30 autovideosink

gst-launch-1.0 v4l2src device=/dev/video0 ! 'video/x-raw,format=I420,width=1280,height=720' ! perf !  nvvidconv ! autovideosink sync=false


gst-launch-1.0 v4l2src device=/dev/video0 ! 'video/x-raw,format=I420,width=1920,height=1080' ! \
perf print-arm-load=yes ! \
nvvidconv ! \
omxh264enc bitrate=8000000 ! 'video/x-h264, stream-format=(string)byte-stream' ! \
filesink location=test.h264 -e

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