Dear All,
imx6 sabresdq:
android 4.2.2 kernel:3.0.35
MX6Q_PAD_KEY_COL3__HDMI_TX_DDC_SCL
MX6Q_PAD_KEY_ROW3__HDMI_TX_DDC_SDA
as plugin hdmi cable, show 'unable to read EDID block' always, zero array edid data get from "cat edid", no i2c signal output from DDC_SCL and DDC_SDA.
Where is problem?
must use HDMI_TX_DDC_SCL and HDMI_TX_DDC_SDA and can not use I2C2_SCL and I2C2_SDA to get edid?
thanks.
Hi echo
I2C2_SCL and I2C2_SDA also can be used. Do you use "true" HDMI or just a
HDMI - DVI adapter ? "True" HDMI display with special HDMI cable should be used.
Just for test one can try uboot logo with hdmi (check i2c signals with oscilloscope) :
Best regards
igor
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Dear igor,
I use HDMI-VGA adapter(it68913).
I only focus how to get edit array now.
I found functions hdmi_enable_ddc_pin never be call in mxc_hdmi driver. As enable hdp pin high level input, just call hdmi_disable_ddc_pin. hdmi_disable_ddc_pin funciton just use MX6Q_PAD_KEY_COL3__I2C2_SCL and MX6Q_PAD_KEY_ROW3__I2C2_SDA as i2c communication line. but unfortunately no clk and data output from two lines.