Hi, On Fri, Oct 3, 2014 at 3:29 AM, [email protected] <[email protected]> wrote: > I > > On Thu, Oct 2, 2014 at 1:19 PM, Christian Ege <[email protected]> wrote: >> During a quick search I had not been able to find any HDMI CEC driver. In >> the docs available there is only one Register about CEC. >> >> I thought about implementation of an driver and libcec support for the A20. > > I believe CEC is just I2C on the HDMI connector. > > So maybe --- it is one of the I2C devices. Then that bit enables it > onto the HDMI pin? Just a guess. > > EDID works the same way. How is it implemented?
You are referring to DDC. The HDMI block has a separate DDC controller. IIRC, the DDC pins also have standard TWI muxed on them, so you could use either one. But this is entirely irrelevant to the original question. As Christian stated, the HDMI block does have a register named HDMI_HDP_CEC. However it does not contain any useful descriptions. Also the SoC does have a pin for HDMI CEC. Best ask Allwinner for some help. ChenYu -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
