topic Would it work while I use i2c3 for hdmi in i.MX Processors

Would it work while I use i2c3 for hdmi

jiejia — Fri, 10 Apr 2015 09:34:30 GMT

I am trying to install Linux on our custom board similar to the I.MX6Q Sabresd board. Linux version: 3.0.35.

On the Sabresd board HDMI uses I2C2, and on our custom board HDMI uses I2C3.

In arch/arm/mx6/board_mx6q_sabresd.c:

static struct fsl_mxc_hdmi_platform_data hdmi_data = {

.init = hdmi_init,

.enable_pins = hdmi_enable_ddc_pin,

.disable_pins = hdmi_disable_ddc_pin,

};

The function of hdmi_enable_ddc_pin would set the IOMUX:MX6DL_PAD_KEY_COL3__HDMI_TX_DDC_SCL,MX6DL_PAD_KEY_ROW3__HDMI_TX_DDC_SDA. However, I can not set the IOMUX, while i use the i2c3. Would it be ok while i use i2c3?

Re: Would it work while I use i2c3 for hdmi

igorpadykov — Tue, 14 Apr 2015 00:13:00 GMT

Hi jie

you are right, i2c3 also should work fine.

Best regards

igor

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Re: Would it work while I use i2c3 for hdmi

jiejia — Tue, 14 Apr 2015 00:48:21 GMT

Hi,igorpadykov

If i2c3 work fine, what should I change for the function of hdmi_enable_ddc_pin?

static iomux_v3_cfg_t mx6q_sabresd_hdmi_ddc_pads[] = {

MX6Q_PAD_KEY_COL3__HDMI_TX_DDC_SCL, /* HDMI DDC SCL */

MX6Q_PAD_KEY_ROW3__HDMI_TX_DDC_SDA, /* HDMI DDC SDA */

};

static void hdmi_enable_ddc_pin(void)

{

if (cpu_is_mx6dl())

mxc_iomux_v3_setup_multiple_pads(mx6dl_sabresd_hdmi_ddc_pads,

ARRAY_SIZE(mx6dl_sabresd_hdmi_ddc_pads));

else

mxc_iomux_v3_setup_multiple_pads(mx6q_sabresd_hdmi_ddc_pads,

ARRAY_SIZE(mx6q_sabresd_hdmi_ddc_pads));

}