[U-Boot] [PATCH] imx: nitrogen6x: mx6qsabrelite: Add support for DVI monitors

Eric Nelson eric.nelson at boundarydevices.com
Wed Jul 24 00:12:33 CEST 2013


Hi Fabio,

On 07/23/2013 02:46 PM, Fabio Estevam wrote:
> Hi Eric,
>
> On Tue, Jul 23, 2013 at 6:43 PM, Eric Nelson
> <eric.nelson at boundarydevices.com> wrote:
>
>> A little background is probably appropriate for this patch.
>>
>> Since "the beginning" of usage of the SABRE Lite and Nitrogen6x
>> boards, DVI detection has been somewhat broken.
>>
>> Some (most) DVI monitors don't produce the "HPD" bit in
>> the PHY_STAT0 register, but do show proper toggling of the
>> RX_SENSE0..3 bits.
>>
>> Creating a new the bit-mask to include all five bits and
>> modifying the 'hdmidet' command and internal detection
>> routines allows these monitors to function properly in U-Boot.
>>
>> A related patch to our kernels allows things to work under
>> Linux:
>>
>> https://github.com/boundarydevices/linux-imx6/commit/7d8752905c118af9063738a533227de0b2f6ecd4
>
> Thanks for the excellent explanation and for finding the root cause!
>
> It would be really nice if Robert could send a v2 adding your text
> into the commit log.
>

Seems to be already done.

Also note that this patch will be smaller with a V3 of your patch
collapsing SABRE Lite into the nitrogen6x/ tree (nudge nudge)...

Regards,


Eric


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