Linux/PROCESSOR-SDK-AM335X: Touchscreen issue with SDK 5.0

Hello Peter,
What board are you using?

Regards,
Nick

It's the evmsk with a different touchscreen

Hello Peter,

I am checking to see if anything has changed. By "previous SDK", do you mean that touchscreen was working before on Linux SDK 4.3? Or were you referring to a different version of the SDK?

Regards,
Nick

Yes everything is working on 4.3, kernel 4.9.69 if i boot from the old SD.

I see another thing, not sure if it's related

[FAILED] Failed to start Load Kernel Modules.

See 'systemctl status systemd-modules-load.service' for details.

it is because the ftdi_sio.ko is missing in 5.0, /etc/modules-load.d/kobuki.conf includes it?

Hello Peter,

The goodix module is getting loaded and probed but the actual Goodix H/W does not seem to be accessible on the bus as all of the i2c read operation failed (hence the -121 (-EIO) errors).

What does "i2cdetect -y -r 0" show?

Regards,
Nick

0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- 14 -- -- -- 18 -- -- UU -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- UU -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: 50 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

On the working SDK it looks like this,

0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- 18 -- -- UU -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- UU -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: 50 -- -- -- -- -- -- -- -- -- -- -- -- UU -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

I just tried to change the i2c address to 14 in the dts file

GT911 supports two I2C slave addresses: 0xBA/0xBB and 0x28/0x29. The host can select the address by changing the status of Reset and INT pins during the power-on initialization phase. See the diagram below for configuration methods and timings:

but still fails and show up as 5d?

root@am335x-evm:~# modprobe goodix
[ 166.704718] Goodix-TS 0-005d: i2c test failed attempt 1: -121
[ 166.744669] Goodix-TS 0-005d: i2c test failed attempt 2: -121
[ 166.785171] Goodix-TS 0-005d: I2C communication failure: -121
[ 166.791105] Goodix-TS: probe of 0-005d failed with error -121


0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- 18 -- -- UU -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- UU -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: 50 -- -- -- -- -- -- -- -- -- -- -- -- 5d -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

I changed the dts file and got it to work, but there still seems to be some errors ?

And the "[FAILED] Failed to start Load Kernel Modules." error
seems to be a known bug.
PLSDK-2188 am335x-evm, am572x-evm Failure to load ftdi_sio kernel module None

fails before my /etc/modules-load.d/goodix.conf is loaded,
so is there another way to load the goodix module automatically ?



gt911:gt911@14 {
compatible = "goodix,gt911";
reg = <0x14>;
interrupt-parent = <&gpio2>;
interrupts = <0 0>;

irq-gpios = <&gpio2 0 0>;
reset-gpios = <&gpio2 1 0>;
};

/* gt911:gt911@14 {*/
/* compatible = "goodix,gt911";*/
/* reg = <0x14>;*/
/* interrupt-parent = <&gpio2>;*/
/* interrupts = <0 IRQ_TYPE_LEVEL_HIGH>;*/

/* irq-gpios = <&gpio2 0 GPIO_ACTIVE_HIGH>;*/
/* reset-gpios = <&gpio2 1 GPIO_ACTIVE_LOW>;*/
/* };*/

root@am335x-evm:~# i2cdetect -y -r 0
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- 14 -- -- -- 18 -- -- UU -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- UU -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: 50 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
root@am335x-evm:~# [ 140.660651] NET: Registered protocol family 15
[ 140.926308] Initializing XFRM netlink socket

root@am335x-evm:~# modprobe goodix
[ 177.766938] Goodix-TS 0-0014: ID 911, version: 1060
[ 177.772260] Goodix-TS 0-0014: Direct firmware load for goodix_911_cfg.bin failed with error -2
root@am335x-evm:~# [ 177.814570] input: Goodix Capacitive TouchScreen as /devices/platform/ocp/44e0b000.i2c/i2c-0/0-0014/input/input4

root@am335x-evm:~# i2cdetect -y -r 0
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- UU -- -- -- 18 -- -- UU -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- UU -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: 50 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

Hello Peter,

Great. So to restate: Goodix is now working as expected, but it must be manually started with modprobe?

Regards,
Nick

Hello Peter,

I am going to mark this resolved. Please let us know if you have additional questions!

Regards,
Nick