patch: add support for CustomEDID to radeon

[Alex Deucher]

On Fri, Sep 11, 2009 at 12:04 AM, Dave Airlie<airlied at gmail.com> wrote:
> On Fri, Sep 11, 2009 at 1:46 PM, Alex Deucher <alexdeucher at gmail.com> wrote:
>> 2009/9/10 Csillag Kristof <csillag.kristof at united-consult.hu>:
>>> Hi all,
>>>
>>> As I have mentioned a few days earlier, I have encountered a Samsung
>>> 214T monitor,
>>> which is unable to properly use DDC when connected via DVI, but works
>>> fine via VGA.
>>>
>>> I could not get it to work with the Radeon driver, but the proprietary
>>> NVIDIA driver
>>> had an option to force-feed the driver with custom EDID data from a
>>> file, instead of DDC,
>>> so I could use the monitor with NVIDIA.
>>>
>>> However, I wanted the Radeon driver, so I have added the same option to
>>> the radeon driver.
>>> It works for me; if you consider this useful, please add to the official
>>> branch.
>>>
>>>    * * *
>>>
>>> Here is how I use it:
>>>
>>> 1. Connect the monitor to the PC using VGA
>>> 2. get-edid > /root/Samsung_214T.edid
>>> 3. add to xorg.conf:     Option      "CustomEDID"
>>> "DVI-0:/root/Samsung_214T.edid"
>>> 4. Connect the monitor to the PC using DVI
>>> 5. Restart X
>>>
>>>
>>> ... and it work.s
>>>
>>> As far as I can tell, there is no other way to make this monitor work
>>> with this driver,
>>> so this is very important to me; however, I am not sure how many people are
>>> blessed with such broken hardware, so I can not estimate the real importance
>>> of the problem.
>>>
>>>    * * *
>>>
>>> Please let me know what do you think!
>>
>> Great patch!  thanks for doing this.  I've made some small
>> improvements to it.  Please test this patch and let me know and I'll
>> go ahead and commit it.
>>
>
> /me wonders if this could be in the server at all.
>

Should be pretty easy to just pull RADEONGetHardCodedEDIDFromFile()
into the xserver.  Wouldn't even need to match the output name since
it would be per-monitor section.

Alex


> Dave.
>
>> Thanks,
>>
>> Alex
>>
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>