VIM3L khadas GPIO and MIPI camera query

rutvij.trivedi · July 27, 2021, 5:09pm

Hi,
I have started working on VIM3L.
For our requirements we are planning to make custom carrier board over 40 pin gpio header.
My queries are as per below,

Are all the 40 PIN in header accessible ? Are they occupied somewhere ?
I tried to access but i was able to access 3 gpios only from 40 PIN headers.
I tried this link.
Which are the MIPI cameras supported/tested with vim3l khadas ?
Any list of part numbers ?

Any help would be appriciable.

–
Thanks

Frank · July 28, 2021, 1:41am

@rutvij.trivedi Most of the pins are multiplexed. If you want to use it as normal IO, you need to turn off the related DTS configuration

rutvij.trivedi · July 28, 2021, 5:53am

Hi @Frank,
Thank you for the quick reply,

If I turn off from DTS will I lose any onboard functionality ?
If Pins are currently being used by some other onboard peripheral and if I turn them off to use them from 40 pin headers , I may lose onboard functionality I believe, please correct me .
OS08A10 is the only MIPI camera that will work ? Any other 2 lane MIPI camera will work ?
I believe if I add kernel drivers for other cameras, it should work ?! please correct me.

Please correct me on my assumptions if they are misleading.

Thanks

Frank · July 28, 2021, 6:07am

@rutvij.trivedi Yes. You can follow our docs to use overlay.

https://docs.khadas.com/zh-cn/vim3/HowToUseDeviceTreeOverlay.html

If you can add drivers to kernel , you can use other cameras

rutvij.trivedi · July 31, 2021, 5:47pm

Hi @Frank,
Apologizing for asking noob questions,

Can these 40 pins be configured in GPIO apart from alternate functionality ?
Any other camera sensor tested with same SBC?

–
Thanks

Frank · August 2, 2021, 1:38am

@rutvij.trivedi

Not all pins are ok

The official only supports this, pinch you can try other cameras, and the driver can be transplanted.

rutvij.trivedi · December 24, 2021, 2:16pm

Hi @Frank,

Apologizing for reopening this.

I have been through the specs of OS08A10 sensor, in this in compatibility list it has been mentioned that it is not compatible with VIM3l but with VIM3.

is my understanding correct ?

So can you suggest any other directly compatible sensor module for VIM3L ?

Appreciate your guidance.

–
Thanks,
Rutvij Trivedi

Frank · December 26, 2021, 1:13am

@rutvij.trivedi VIM3L has no ISP module

rutvij.trivedi · December 26, 2021, 5:33am

Hi @Frank ,

Thanks for reverting, I am aware that it does not have ISP, in the same thread we discussed on that.
What I can not get is, which sensor is tested with VIM3L ?

Initially, we discussed on this thread about OS08A10 but this is not compatible with vim3L(from the specs).

So which sensor I should try first ?
Any 3rd party ? Any khadas supplied ? Any link ?

Can 0v5640 or arducam in 2-lane tested ?

Appreciate your suggestion.

–
Thanks
Rutvij

Frank · December 26, 2021, 7:24am

@rutvij.trivedi

There is no ISP module inside the S905D3 chip.
We have not tested any ISP camera on VIM3L
If you need to test on VIM3L, you need to use a camera with its own ISP.

rutvij.trivedi · December 26, 2021, 9:24am

@Frank , Well from OV5640 datasheet it seems to have ISP and configurable lanes.

And from the source I could see OV5640 driver availability,

github.com

khadas/linux/blob/khadas-vims-4.9.y/drivers/amlogic/media/camera/ov5640.c

/*
 * drivers/amlogic/media/camera/ov5640.c
 *
 * Copyright (C) 2017 Amlogic, Inc. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 */

#include <linux/sizes.h>
#include <linux/module.h>
#include <linux/delay.h>

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And

May we can try this.

–
Thanks,
Rutvij

rutvij.trivedi · December 31, 2021, 6:04am

Hi @Frank
May I expect your expert opinion on the above ?

PS - Happy New year in advance.

–
Thanks,
Rutvij

Frank · December 31, 2021, 6:06am

@rutvij.trivedi Sorry, I don’t have this camera for testing. From your pictures, it seems feasible, but you need to debug it yourself.I’m not sure it will work.

Ps: Happy new year too

rutvij.trivedi · December 31, 2021, 6:34am

@Frank , Thanks , Certainly I have to do it .
I will post updates regarding that.

rutvij.trivedi · February 11, 2022, 10:46am

@Frank ,

Are there any plans to provide support of CSI on mainline?
Is it under WIP? or any plans?

Appreciate your pointers.

rutvij.trivedi · February 28, 2022, 4:25pm

Hi @Frank and @numbqq,

Can you please provide a link to the source code/patch which has OS08A10 functioning on either of any vim hardware (Amlogic)?

Appreciate your help.

Frank · March 1, 2022, 12:40am

@rutvij.trivedi

github.com

khadas/linux/blob/khadas-vims-4.9.y/drivers/amlogic/isp_module/subdev/sensor/src/driver/sensor/OV08a10_drv.c

/*
*
* SPDX-License-Identifier: GPL-2.0
*
* Copyright (C) 2011-2018 ARM or its affiliates
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2.
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/

//-------------------------------------------------------------------------------------

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rutvij.trivedi · March 1, 2022, 5:55am

Hi @Frank,
Thanks for the replay however to utilize this source I believe I will need DTS too.
Can you help with that too?

Thanks

Frank · March 1, 2022, 6:01am

@rutvij.trivedi

github.com

khadas/linux/blob/khadas-vims-4.9.y/arch/arm64/boot/dts/amlogic/kvim3_linux.dts#L816

    
      
          		compatible = "amlogic, cpufreq-meson";
          		status = "okay";
          	};
          
          
    onewire:onewire {
          		compatible = "w1-gpio";
          		gpios = <&gpio GPIOH_6 GPIO_ACTIVE_HIGH>;
          		status = "disabled";
          	};
          
          
	sensor: sensor {
          		compatible = "soc, sensor";
          		status = "disabled";
          		sensor-name = "os08a10"; /*imx290;os08a10;imx227*/
          		pinctrl-names="default";
          		pinctrl-0=<&gen_clk_ee_ao>;
          		clocks = <&clkc CLKID_GEN_CLK>;
          		clock-names = "gen_clk";
          		reset = <&gpio_expander 3 GPIO_ACTIVE_HIGH>;
          		ir_cut_gpio = <&gpio_expander 2 GPIO_ACTIVE_HIGH>;
          	};

rutvij.trivedi · March 1, 2022, 6:21am

Great Thanks @Frank, I will try this out.