SC20 | Integrating GT911 touch

richucj · November 6, 2019, 1:42pm

Hi All,
I’m trying to integrate GT911 TP to SC20.
and I’m getting ARB _LOST in i2c i don’t know why .
please help me to sort out the issue.

3.659813] Goodix-TS 5-005d: +++++++++++++++++for debug++++++++++
[ 3.659881] Goodix-TS 5-005d: ++++power gpio [944]!
[ 3.659890] Goodix-TS 5-005d: ++++IO power_en gpio [923]successfully
[ 3.659925] Goodix-TS 5-005d: Regulator get failed avdd ret=-19
[ 3.659935] Goodix-TS 5-005d: Regulator get failed vdd ret=-19
[ 3.660411] Goodix-TS 5-005d: ++++set sleep power_gpio on
[ 3.660771] Goodix-TS 5-005d: Can not lookup pmx_ts_release pinstate -19
[ 3.797508] i2c-msm-v2 78b9000.i2c: msm_bus_scale_register_client(mstr-id:86):0x8 (ok)
[ 3.842175] i2c-msm-v2 78b9000.i2c: ARB_LOST: msgs(n:1 cur:0 tx) bc(rx:0 tx:4) mode:FIFO slv_addr:0x5d MSTR_STS:0x081321d0 OPER:0x00000090
[ 3.868847] i2c-msm-v2 78b9000.i2c: ARB_LOST: msgs(n:1 cur:0 tx) bc(rx:0 tx:4) mode:FIFO slv_addr:0x5d MSTR_STS:0x081321d0 OPER:0x00000090
[ 3.891717] i2c-msm-v2 78b9000.i2c: ARB_LOST: msgs(n:1 cur:0 tx) bc(rx:0 tx:4) mode:FIFO slv_addr:0x5d MSTR_STS:0x081321d0 OPER:0x00000090
[ 3.916733] i2c-msm-v2 78b9000.i2c: ARB_LOST: msgs(n:1 cur:0 tx) bc(rx:0 tx:4) mode:FIFO slv_addr:0x5d MSTR_STS:0x081321d0 OPER:0x00000090
[ 3.936997] i2c-msm-v2 78b9000.i2c: ARB_LOST: msgs(n:1 cur:0 tx) bc(rx:0 tx:4) mode:FIFO slv_addr:0x5d MSTR_STS:0x081321d0 OPER:0x00000090
[ 3.948424] Goodix-TS 5-005d: init external watchdog failed!
[ 3.962812] i2c-msm-v2 78b9000.i2c: ARB_LOST: msgs(n:2 cur:0 tx) bc(rx:1 tx:2) mode:FIFO slv_addr:0x5d MSTR_STS:0x081321d0 OPER:0x00000010
[ 3.974241] Goodix-TS 5-005d: I2C retry: 1
[ 3.990489] i2c-msm-v2 78b9000.i2c: ARB_LOST: msgs(n:2 cur:0 tx) bc(rx:1 tx:2) mode:FIFO slv_addr:0x5d MSTR_STS:0x081321d0 OPER:0x00000010
[ 4.001918] Goodix-TS 5-005d: I2C retry: 2
[ 4.020626] i2c-msm-v2 78b9000.i2c: ARB_LOST: msgs(n:2 cur:0 tx) bc(rx:1 tx:2) mode:FIFO slv_addr:0x5d MSTR_STS:0x081321d0 OPER:0x00000010
[ 4.032055] Goodix-TS 5-005d: I2C retry: 3
[ 4.045156] i2c-msm-v2 78b9000.i2c: ARB_LOST: msgs(n:2 cur:0 tx) bc(rx:1 tx:2) mode:FIFO slv_addr:0x5d MSTR_STS:0x081321d0 OPER:0x00000010
[ 4.056584] Goodix-TS 5-005d: I2C retry: 4
[ 4.068997] i2c-msm-v2 78b9000.i2c: ARB_LOST: msgs(n:2 cur:0 tx) bc(rx:1 tx:2) mode:FIFO slv_addr:0x5d MSTR_STS:0x081321d0 OPER:0x00000010
[ 4.080429] Goodix-TS 5-005d: I2C retry: 5

jax.zhang · November 7, 2019, 1:23am

hi richuci:
we have iintegrated GT911, you don’t need to modify anything.
if you hardware is reference to our doc, the touchupanel will work properly.

jax.zhang · November 11, 2019, 9:01am

If you don’t mind you can send this file to me.
kernel/arch/arm/boot/dts/qcom/msm8909-mtp.dtsi

jax.zhang · November 12, 2019, 2:18am

power-gpios = <&msm_gpio 33 0x0>;
You have modified the power-gpio. Quectel use gpio23. So please check your hardware design.

richucj · November 12, 2019, 4:42am

Hi jax,
We are using gpio33.so modified.

jax.zhang · November 12, 2019, 8:20am

Befor you replaced the config data, did the touchpanel can work properly?
You test the touchpanel on Quectel’s EVB or your device?
If on your device, can you send me the hardware design.

jax.zhang · November 13, 2019, 6:54am

Can you send me complete bootup log.
if you use original config, Whether the touchpanel can work properly?

richucj · November 13, 2019, 9:31am

Asked display vendor about the issue and tp uses 2.8V or 3.3V logic level.And we designed it for 1.8V so we level converted pins to 2.8V using wires.
now the timeout error has been gone but i2c is showing noisy bus error .Since wired the i2c communication distance has been increased.Can it cause that error?

i2c-msm-v2 78b9000.i2c: msm_bus_scale_register_client(mstr-id:86):0x8 (ok)
[ 3.827973] i2c-msm-v2 78b9000.i2c: BUS ERROR:noisy bus/unexpected start/stop tag: msgs(n:1 cur:0 tx) bc(rx:0 tx:4) mode:FIFO slv_addr:0x5d MSTR_STS:0x041121c4 OPER:0x00000080
[ 3.867629] i2c-msm-v2 78b9000.i2c: error timeout on polling for valid state. check core_clk
[ 3.875164] i2c-msm-v2 78b9000.i2c: BUS ERROR:noisy bus/unexpected start/stop tag: msgs(n:1 cur:0 tx) bc(rx:0 tx:4) mode:FIFO slv_addr:0x5d MSTR_STS:0x041121c4 OPER:0x00000080

jax.zhang · November 29, 2019, 2:11am

hi richucj:
this is a normal log. you don’t need care this.
if the issue caused by voltage, why the touchpanel can work properly befor you update config data?

richucj · November 29, 2019, 4:28am

hi jax,
issue has been solved it was because of logic level issue.
thanks for the support…

richucj · November 29, 2019, 10:43am

Hi jax,
how can i change the screen orientation?
to rotate 180 degree…

jax.zhang · November 29, 2019, 10:57am

hi rihucj:
I will colse this issue, if you have other issue, please create a new topic.