Posts by ilmich

Quote from GRegNfo

Hi guys,

I tried to plug my V88-4K (rk3229) box to a monitor (supports touch but whatever) that is capable of:

640 x 480 at 60Hz

800 x 600 at 60Hz

1024 x 768 at 60Hz

1280 x 800 at 60, 60RB Hz

1280 x 960 at 60Hz

1280 x 1024 at 60Hz

1360 x 768 at 60Hz

1366 x 768 at 60, 60RB Hz

I couldn't manage to make it sync so, no image at all... it tries to auto sync to the box with no result.

Do I need to change anything in the SYSTEM image, add some file to my SD card root or folders?

Thanks!!!

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Hi,

try to open file on sdcard first partition extlinux/extlinux.conf and remove/adjust the resolution inside kernel parameter 'video'

Quote from MIKMXIII

Hello friend can you tell me how you did it? thanks

With latest builds it shouldn't be needed anymore. If the ddr3 version not works for you try the ddr2 (alfawise a8 for rk3228 or v88mars for rk3229).

Quote

If you could share your trick the let UHS mode work would be greatly appreciated!

I don't have a fix for UHS.. I've disabled it so my card works slower, but works.

knaerzche has explained this better in older post

Regarding sd card you are right, my fault. But i've started playing with this box a weeks ago, so if you tell me "double check"

Quote

BTW: Would be great if you relase source / write an howto for your slackware attempt like jock2 did it for armbian.

Maybe in my spare time, but substantially starting from your image (for the uboot/trust parts) I've only recompiled kernel (disabling initramfs that load libreelec squashfs filesystem) and followed the README

Quote

Hhhm, the card showed on your pics is a UHS1-Card.

you are right, sorry.

However my aim is to share with other peoples my tests and some coding in order to help development.. But thanks to your hard works, my box with some tricks works even with uhs1 (I've also rebuilt kernel and installed Slackware for fun). Discover what exactly was wrong with your images or what model exactly I've buyed is only for that. If you think are useless I stop spaming

Trust me guys, all rk3229 images not works for me. Now I've tried rk3229 - V88mars but it won't boot (only red led).

Then I've flashed trust.img for rk3228x and boot with blu led but hangs (no sdcard).

Finally I've replaced the dtb with mine (without uhs support for sd card controller) and all works.

Sadly I'm not able to debug via uart (not visible pins on my board) to see why my rk3229 box seems to be another thing.

EDIT: I'm not using uhs cards because I've discovered that my sd controller does not support uhs at all (this is why the controller crash on boot, kernel try to send some commands for uhs supports, but controller never responds) so the only fix is to disabling it.

Hi jock2, I'm a bit confused about what is my real model, but i think it's normal with this chinese boxes.

I've only tried almost all images (also the one for rk3229) and the only that boots is the one for the mx4 4k pro with my modified dtb.

for knaerzche , I've finally discovered what not works on my box with your images. This is my dts coded on top of an rk3228b box dts.

/*
 * Copyright (C) 2020 knaerzche <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

/dts-v1/;

#include "rk3228b-box.dtsi"

/ {
    model = "RK3228b V88 (mx4vr-v01 board)";

    leds {
                compatible = "gpio-leds";

                led_blue {
                        gpios = <&gpio1 RK_PA7 GPIO_ACTIVE_LOW>;
                        default-state = "on";
                };

                led_red {
                        gpios = <&gpio3 RK_PC5 GPIO_ACTIVE_LOW>;
                        default-state = "off";
                        linux,default-trigger = "rc-feedback";
                };
        };

};

&dmc {
    status = "disabled";
};

&sdmmc {
        /delete-property/ sd-uhs-sdr50;
        /delete-property/ sd-uhs-sdr104;
};

I've disabled dmc and some sdmmc commands that hangs the sd controller.

I've a similar board (mine is mx4vr-v01). The image that works for me is the one for "MXQ 4K Pro, RK3228A, DDR3".

Probably you need to replace kernel dtb because in my case the image boots, turn on blue led but freeze with blank screen.

So I've extracted the dtb from my android firmware and used that.

Thanks for the explanation. If I understand correctly Netflix and others, legally allow viewing HD contents on linux. So I lowered the resolution, (to avoid useless upscaling), and the frame dropping disappear.

For me it's better than nothings

After several days of tests and experiments, considering the architecture and the price of the box, the hardware features are excellent.

Some emulators and local streaming are fine.

Paid streaming addons work, but unfortunately, hardware acceleration for DRM content seems to be impossible.(h264 Hardware decoding? · Issue #207 · peak3d/inputstream.adaptive · GitHub)

Hi knaerzche  thanks for your hard work. I've finally run some sort of linux in my box

I'm not sure what is my model but seems to be a Shishion V88 plus with rockchip 3228, 1Gb ram 8Gb rom and ssv6501p wifi card.

Your images for rk3228 works for me only with the dtb extracted from my android firmware, so I'll share the decompiled dtb in case you what to add this device.

I have one question, and some tips

Do you have the source code of trust images for rk3228, or you have found it somewhere!?

Next the tips, with "noop" scheduler and "performance" cpufreq scaling governor (now is interactive by default that is good for smartphones) the box run better.

Thanks

Michele