hdmi on 4430 (kernel 3.4)

hdmi on 4430 (kernel 3.4)

[Federico Fuga]

Hi Everybody,

I am working on a custom OMAP4430 board with HDMI support. I am using the latest omapzoom ubuntu-integration kernel (3.4.0-1487.6) 
I tested the same on the pandaboard with the same cpu, with the same result. Both are lacking the "HDMI Companion chip" (U6 on pandaboard with 4430), because on our custom board we don't need EDID support (we are using an HDMI to VGA chip converter), for testing purpose it was removed from the pandaboard.
I am unable to make HDMI working. 
I was assured that this kernel is correctly working with HDMI on pandaboard, so I'd guess that the problem is due to the missing edid, but I am not 100% sure.
For simplicity, I removed the DVI configuration on the panda board file, by removing the DVI display configuration, and changing the default device to HDMI.
The hdmi interface seems to be configured correctly , the overlay/manager/display chain is correctly setup and enabled, but no signal is detected by the monitor, and the screen is black.
No errors are present in the logs - I'll send a copy of it with omapdss.debug=y tomorrow, eventually.
I wanted to check the HDMI registers, but I didn't find the hdmi registers table on the TRM.
Does someone have some hint, comment or previous experience on that? 
Where can I find the hdmi registers list on the manual or other documentation?
Note that as far as i know, the 2.6.35 kernel was working correctly (I can't check right now, unfortunately).
Thank you.

best regards


Federico Fuga

Re: hdmi on 4430 (kernel 3.4)

[John Tobias]

You need to contact your TI sales rep or tech support to sign an NDA
to get the HDMI documentation. Also, take note that your company
should be listed in HDMI.org in order the TI releases the said
document.

regards,

john

On Mon, Nov 5, 2012 at 1:59 PM, Federico Fuga <ml@studiofuga.com> wrote:
> Hi Everybody,
>
> I am working on a custom OMAP4430 board with HDMI support. I am using the latest omapzoom ubuntu-integration kernel (3.4.0-1487.6)
> I tested the same on the pandaboard with the same cpu, with the same result. Both are lacking the "HDMI Companion chip" (U6 on pandaboard with 4430), because on our custom board we don't need EDID support (we are using an HDMI to VGA chip converter), for testing purpose it was removed from the pandaboard.
> I am unable to make HDMI working.
> I was assured that this kernel is correctly working with HDMI on pandaboard, so I'd guess that the problem is due to the missing edid, but I am not 100% sure.
> For simplicity, I removed the DVI configuration on the panda board file, by removing the DVI display configuration, and changing the default device to HDMI.
> The hdmi interface seems to be configured correctly , the overlay/manager/display chain is correctly setup and enabled, but no signal is detected by the monitor, and the screen is black.
> No errors are present in the logs - I'll send a copy of it with omapdss.debug=y tomorrow, eventually.
> I wanted to check the HDMI registers, but I didn't find the hdmi registers table on the TRM.
> Does someone have some hint, comment or previous experience on that?
> Where can I find the hdmi registers list on the manual or other documentation?
> Note that as far as i know, the 2.6.35 kernel was working correctly (I can't check right now, unfortunately).
> Thank you.
>
> best regards
>
>
> Federico Fuga
>
>
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Re: hdmi on 4430 (kernel 3.4)

[Jon Hunter]

On 11/05/2012 03:59 PM, Federico Fuga wrote:
> Hi Everybody,
> 
> I am working on a custom OMAP4430 board with HDMI support. I am using the latest omapzoom ubuntu-integration kernel (3.4.0-1487.6) 
> I tested the same on the pandaboard with the same cpu, with the same result. Both are lacking the "HDMI Companion chip" (U6 on pandaboard with 4430), because on our custom board we don't need EDID support (we are using an HDMI to VGA chip converter), for testing purpose it was removed from the pandaboard.
> I am unable to make HDMI working. 
> I was assured that this kernel is correctly working with HDMI on pandaboard, so I'd guess that the problem is due to the missing edid, but I am not 100% sure.
> For simplicity, I removed the DVI configuration on the panda board file, by removing the DVI display configuration, and changing the default device to HDMI.
> The hdmi interface seems to be configured correctly , the overlay/manager/display chain is correctly setup and enabled, but no signal is detected by the monitor, and the screen is black.
> No errors are present in the logs - I'll send a copy of it with omapdss.debug=y tomorrow, eventually.
> I wanted to check the HDMI registers, but I didn't find the hdmi registers table on the TRM.
> Does someone have some hint, comment or previous experience on that? 
> Where can I find the hdmi registers list on the manual or other documentation?
> Note that as far as i know, the 2.6.35 kernel was working correctly (I can't check right now, unfortunately).
> Thank you.

I would recommend posting this query on the TI E2E forum for Linux [1].
You may get better help there seeing that this is with regard to a
specific TI development kernel branch.

Cheers
Jon

[1] http://e2e.ti.com/support/embedded/linux/default.aspx

Re: hdmi on 4430 (kernel 3.4)

[Federico Fuga]

Hi Jon,


Il giorno 06/nov/2012, alle ore 00:21, Jon Hunter <jon-hunter@ti.com> ha scritto:

>> I wanted to check the HDMI registers, but I didn't find the hdmi registers table on the TRM.
>> Does someone have some hint, comment or previous experience on that? 
>> Where can I find the hdmi registers list on the manual or other documentation?
>> Note that as far as i know, the 2.6.35 kernel was working correctly (I can't check right now, unfortunately).
>> Thank you.
> 
> I would recommend posting this query on the TI E2E forum for Linux [1].
> You may get better help there seeing that this is with regard to a
> specific TI development kernel branch.
> 


Thank you very much for the suggestion! I'll post there.
Can you confirm that the kernel version I am using works without problem with HDMI-1080p? 
Thanks 
Cheers

Federico

Re: hdmi on 4430 (kernel 3.4)

[Jon Hunter]

On 11/06/2012 03:05 AM, Federico Fuga wrote:
> Hi Jon,
> 
> 
> Il giorno 06/nov/2012, alle ore 00:21, Jon Hunter <jon-hunter@ti.com> ha scritto:
> 
>>> I wanted to check the HDMI registers, but I didn't find the hdmi registers table on the TRM.
>>> Does someone have some hint, comment or previous experience on that? 
>>> Where can I find the hdmi registers list on the manual or other documentation?
>>> Note that as far as i know, the 2.6.35 kernel was working correctly (I can't check right now, unfortunately).
>>> Thank you.
>>
>> I would recommend posting this query on the TI E2E forum for Linux [1].
>> You may get better help there seeing that this is with regard to a
>> specific TI development kernel branch.
>>
> 
> 
> Thank you very much for the suggestion! I'll post there.
> Can you confirm that the kernel version I am using works without problem with HDMI-1080p? 

Sorry, I have not tried. However, hopefully someone from the forum can help.

Cheers
Jon