topic Re: mx6ul platform sii902x hdmi in i.MX Processors

mx6ul platform sii902x hdmi

bingking88 — Thu, 03 Dec 2015 07:05:20 GMT

Hi fsl

in imx6ul-14x14-ddr3-arm2.dts

sii902x config:

sii902x_reset: sii902x-reset {

compatible = "gpio-reset";

reset-gpios = <&gpio1 23 0>;

reset-delay-us = <2000000>;

#reset-cells = <0>;

};

&i2c2 {

clock_frequency = <100000>;

pinctrl-names = "default";

pinctrl-0 = <&pinctrl_i2c2>;

status = "okay";

sii902x@39 {

compatible = "SiI,sii902x";

reg = <0x39>;

interrupt-parent = <&gpio1>;

interrupts = <18 2>;

mode_str ="1024x768M@60";

bits-per-pixel = <16>;

resets = <&sii902x_reset>;

};

i2c pin config:

pinctrl_i2c1: i2c1grp {

fsl,pins = <

MX6UL_PAD_GPIO1_IO03__I2C1_SDA 0x4001b8b1

MX6UL_PAD_GPIO1_IO02__I2C1_SCL 0x4001b8b1

};

pinctrl_i2c2: i2c2grp {

fsl,pins = <

MX6UL_PAD_CSI_HSYNC__I2C2_SCL 0x4001b8b0

MX6UL_PAD_CSI_VSYNC__I2C2_SDA 0x4001b8b0

};

system log print:

sii902x 1-0039: Sii902x: cound not find device

the drivers/video/mxc/mxsfb_sii902x.c

/* Set 902x in hardware TPI mode on and jump out of D3 state */

if (i2c_smbus_write_byte_data(sii902x.client, 0xc7, 0x00) < 0) {

dev_err(&sii902x.client->dev,

" Sii902x: cound not find device\n");

return -ENODEV;

}

hardware test power supply reset were normal

can you give some advice

tks!

Re: mx6ul platform sii902x hdmi

igorpadykov — Thu, 03 Dec 2015 08:48:48 GMT

Hi bingking

please refer to attached i.MX 6UltraLite EVK Board Hardware

User’s Guide sect.2.21 HDMI display connector (J1001) how to

use hdmi.

Best regards

igor

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Re: mx6ul platform sii902x hdmi

bingking88 — Thu, 03 Dec 2015 09:45:53 GMT

hello igorpadykov

the board is our custom made ,chip has welding, signals test are normal !

i2c test is ok

but if (i2c_smbus_write_byte_data(sii902x.client, 0xc7, 0x00) < 0) error!

whether in the public version of the transplanted over sii902x code?

thank you very much！

Re: mx6ul platform sii902x hdmi

igorpadykov — Thu, 03 Dec 2015 09:50:18 GMT

based on error: Sii902x: cound not find device\n"

seems device is not found, you can check i2c signals with oscilloscope

~igor

Re: mx6ul platform sii902x hdmi

bingking88 — Thu, 03 Dec 2015 09:58:28 GMT

hardware signals no problem，Can not determine whether the software config OK

the above dts config

tks!