2012/5/9 Eugeni Dodonov <eugeni.dodonov at linux.intel.com>: > > Without this, I am getting a nice black screen though . But the latest > theory is that perhaps we just need to send any infoframe for the hardware > to catch up and work in HDMI mode? > I finally tested this :) I don't think anymore this is the case since the ddi_func_ctl register seems correct. Lots of theories: - Without this patch, you just run cpt_write_infoframe, which can be messing with a lot of registers that are not DIP registers on HSW - With the patch, you set the control register to 0 at the HDMI init time, which disables any DIP that might be sending bad data and causing the black screen - On my machine, with this patch, after booting and doing everything, the dip control register is 0x00110000, which is totally not what we set/want :) -- Paulo Zanoni
