Hi my hardware engineers are having a couple issues they are working through and would like if you could help perhaps. Switching modes between SPI and GPIO, without changing the device tree. Activation of the ST7701S(MIPI-DSI) display driver (available in the Linux kernel), but there is no act…

Hi, It does not matter with menuconfig. And it does not matter with DRM. dc.c driver is the entry point of all these things… Your “tegradc tegradc.1” is printed from it. When during probe function, tegradc_probe shall register the the driver mentioned in kernel/nvidia/drivers/video/tegra/dc/pane…

Hi xtianus, [image] xtianus: Switching modes between SPI and GPIO, without changing the device tree. For this use case, you could just modify the pinmux register to desired function (SPI or GPIO) dynamically. [image] xtianus: Activation of the ST7701S(MIPI-DSI) display driver (available…

Hi @KevinFFF , Here is the response from engineer. We have a MIPI DSI panel with ST7701s driver. So, before integrate driver to the kernel, I used make menuconfig to configured mipi. Before I include the option <> NVIDIA Tegra DRM , image could build successfully. I get errors in nvidia code. Howev…

Hi, This is not the correct way to enable MIPI DSI within jetson platform. NVIDIA Tegra DRM is totally not in use on jetson nano. I would suggest you can check posts in TX1 forum for this because we actually seldom enable DSI on Jetson nano platform.

[image] WayneWWW: n check posts in TX1 forum for this because we actually seldom enable DSI on Jetson nano platform Hi Wayne, The jetson Nano is our choice because of 2 reasons Size and Cost. Do you have, or would you suggest that we move on to the Orin SOM? I believe it has similar sizing. W…

Hi Wayne, I am an engineer, who works with this MIPI DSI display. I tried to set up dsi according to your link post. However, I am getting a problem when starting the kernel. Starting kernel ... [ 0.000000] Booting Linux on physical CPU 0x0 [ 0.000000] Linux version 4.9.337-tegra (buildbra…

Use dmesg to check the log instead of uart. Also, check the panel driver to meet your panel requirement. There should be something called panel-a-wxga-8-0.c (or similar file name) under your kernel source (nvidia directory). There is no standard answer for a DSI panel. For example, I am not sure …

I am used example from the arch/arm64/boot/dts/tegra210-p3448-0000-p3449-0000-b00-hdmi-dsi.dts / { nvidia,dtsfilename = __FILE__; host1x { /* DSI mapped to tegradc.1 */ dc@54240000 { status = "okay"; nvidia,dc-or-node = "/host1x/dsi"; nvidia,dc-connector = <&dsi>; /* DSI supplies …

Check the driver code and dmesg. You shall find the driver code (dc.c) uner nvidia directory. Modify the panel driver regulator to meet your hardware design. Check this: [image] Activate dsi on jetson nano som Jetson Nano I have tried to activate the dsi firs…

Are there any mistakes in this code? dc@54240000 { status = "okay"; nvidia,dc-flags = <TEGRA_DC_FLAG_ENABLED>; nvidia,emc-clk-rate = <300000000>; nvidia,fb-bpp = <32>; nvidia,fb-flags = <TEGRA_FB_FLIP_ON_PROBE>; nvidia,dc-or-node = "/host1x/dsi"; nvidia,dc-connector = <&dsi>; …

Help with switching modes between SPI and GPIO and Activation of ST7701S MIPI-DSI

Robotics & Edge Computing Jetson Systems Jetson Nano

WayneWWW August 30, 2023, 1:51am 7

Hi,

Orin and Xaiver totally do not support DSI anymore. So using them does not help.

We have some old posts here. You could refer to the dts tegra210-p3448-0000-p3449-0000-b00-hdmi-dsi.dts to check how to enable “dsi” in our tegradc controller.

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Help with switching modes between SPI and GPIO and Activation of ST7701S MIPI-DSI

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