[PATCH] OMAP4: PandaBoard: Adding DVI support

[Bryan Wu]

On Wed, Feb 9, 2011 at 10:08 PM, Gadiyar, Anand <gadiyar at ti.com> wrote:
> On Wed, Feb 9, 2011 at 7:25 PM, Raghuveer Murthy
> <raghuveer.murthy at ti.com> wrote:
>> Adding DVI support to OMAP4 PandaBoard.
>>
>> PandaBoard uses TFP410 DVI Framer chip
>> http://focus.ti.com/lit/ds/symlink/tfp410.pdf
>>
>> The TFP410 gets its power enable and display data over GPIO lines muxed
>> in from OMAP4430. PandaBoard supports other LCD displays through expansion
>> connectors, following board rework. This will disable the DVI interface.
>> However, the existing mux settings remain the same
>>
>> PandaBoard additionally supports display over HDMI interface. It is
>> mutually exclusive to display over DVI. Hence the mux settings need to be
>> configured seperately, as and when HDMI is enabled
>>
>> Also, I2C3 bus used for reading EDID data from DVI Monitors is
>> registered here. Since the design is similar to BeagleBoard, the code
>> for the same is taken from the kernel.org commit e3333f48dd5cb21
>> (omap: Adding beagle i2c eeprom driver to read EDID)
>>
>> Reviewed-by: Manjunath G Kondaiah <manjugk at ti.com>
>> Reviewed-by: Anand Gadiyar <gadiyar at ti.com>
>
> I've also tested it on the Panda, and gone through this and most
> of the other patches in the series. So if you like, you could
> consider this an:
>
> Acked-by: Anand Gadiyar <gadiyar at ti.com>
>
>> Reviewed-by: Nishanth Menon <nm at ti.com>
>> Reviewed-by: Sumit Semwal <sumit.semwal at ti.com>
>> Signed-off-by: Raghuveer Murthy <raghuveer.murthy at ti.com>
>> ---
>>
>> Base
>> ====
>> url =
>> git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
>> branch "master"
>> commit 100b33c8bd8a3235fd0b7948338d6cbb3db3c63d
>> tag 2.6.38-rc4
>>
>
> To make it easier for someone to test, I've extracted this
> and the 6 dependent series from patchwork, and hosted
> them in a branch on my devel tree. They are available
> against v2.6.38-rc4 here:
>
> git://dev.omapzoom.org/pub/scm/anand/linux-omap-usb.git
>
> in the display-patches-for-v2.6.38-rc4 branch if someone
> wants to take a look.

I fetched this branch which contains 35 patches on top of 2.6.38-rc4.
After fixing some conflict, I applied these 35 patches on our Ubuntu
ti-omap-dev kernel. With built-in the DSS2 driver and GENERIC_DPI
driver, kernel boots fine on my Panda with Ubuntu GUI. But I have to
set the kernel boot command args with omapfb.mode=dvi:1024x768MR-24 at 60
omapdss.def_disp=dvi, pointed out by Sebastien. Without this bootargs,
no graphic at all. so as Robert concerned, EDID detection doesn't
work. Does that related to I2C driver? I2C driver always tell me
timeout in dmesg.

Thanks a lot,
-- 
Bryan Wu <bryan.wu at canonical.com>
Kernel Developer    +86.138-1617-6545 Mobile
Ubuntu Kernel Team
Canonical Ltd.      www.canonical.com
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