My platform is Bay trail -I E3845 D0, BIOS is coreboot + intel FSP3, test OS is WIN7.
on WIN7 device control manager have HDA, use HDMI interface Video have
output, but audio no, from reltek codedec alc886 connect to earphone have output.
I check code, I find FSP look like to write verbtable fail, so after fsp initial, I rewrite
verb table again its success, but HDA still no output.
below is I check result,
1. VGA ROM pass its leavage from AMI mp project.
2. verbtable pass, I rewrite.
3. HDA device is on pass.
4. i2s fail. device manager should be show correct monitor model name, but just show pnp monitor.
5. reltek codec earphone pass.
I want know
1. Intel have porting guide for HDA?
2. have other point I not yet to check?
We are searching for a possible reason why the HDMI is not working properly.
In the meanwhile please review the http://www.intel.com/content/www/us/en/standards/high-definition-audio-specification.html High Definition Audio Specification document.
Please disable the reltek codedec acl886 and just try with the HDA in the HDMI to test.
It looks as if the graphics driver is not installed since your HDMI monitor is not detected.
There is another audio driver that comes along with the graphic driver package which should get this setup working.
Here a link to get the driver package for both Windows 32bit & 64bit.
https://downloadcenter.intel.com/Detail_Desc.aspx?agr=Y&DwnldID=23584 Intel® Embedded Media and Graphics Driver for Windows* 7 (build # 1064) v36.15.0 (32bit) and v37.15.0 (64bit)
We would to hear more about your issue, have you managed to find a solution?
If not please let us know so we could find further solutions.
Have a nice day!