On 09/22/2012 10:19 AM, Eric Nelson wrote:
On 09/22/2012 10:02 AM, Fabio Estevam wrote:
Hi Eric,
On Sat, Sep 22, 2012 at 1:51 PM, Eric Nelson eric.nelson@boundarydevices.com wrote:
Interestingly, I saw U-Boot display on HDMI during my testing, so I'm pretty certain that all we need is the HDMI transmitter initialization sequence.
Excellent, could you please share the HDMI transmitter init sequence?
Hi Fabio,
I haven't worked through the details, but I'm sure they're in here ;)
https://github.com/boundarydevices/linux-imx6/blob/boundary-L3.0.35_MX6DQ_ER...
This may be easier than I thought (a set of writes to a single register).
I did a little digging, and it seems that the power-on defaults for the HDMI transmitter work pretty well with my display (many thanks to the chip designers!).
Without some more digging, I'm not very confident that the clocks are all getting set up properly, but the attached patch allows me to get 1080P video over HDMI.
It also highlights some issues in the I2C detection structure (two parallel arrays that I hacked), but it gives me a lot more confidence that HDMI is achievable in the short term for at least one display.
Regards,
Eric