[PATCHv6 1/3] ARM:dt-bindings Intel FPGA Video and Image Processing Suite

[Ong, Hean Loong]

Hi Laurent,

On Thu, 2017-08-24 at 12:39 +0300, Laurent Pinchart wrote:
> Hi Hean Loong,
> 
> On Thursday, 24 August 2017 08:41:50 EEST Ong, Hean Loong wrote:
> > 
> > Hi Laurent,
> > 
> > I removed the examples for the HDMI in the draft below. The
> > connections
> > between the VIP and Display Port IP or any display connector are
> > determined by HW logic. There are currently no SW defined encoders
> > or
> > connectors that is connected to the AVALON-ST other than the Intel
> > VIP
> > Frame Buffer II. Therefore there are no examples for the Display
> > Port
> > encoder and connector.
> But there must be an encoder, even if its default configuration makes
> it 
> usable without a softwarer driver at the moment. As the encoder is
> there in 
> hardware, it should be described in DT.
> 
I attach some links regarding the simple example designs for the
Display Port IP

The link below has a example design of how the VIP is built along with
the Display Port IP 
into the FPGA connected to the DDR RAM accessed by ARM or any
controller. Please look at the
Introduction section of the link below
http://www.alterawiki.com/wiki/DisplayPort_Design_Example_14.0_(RX_and_
TX)#DisplayPort_IP_Core

The proposed design in the link above and the design we are
implementing are almost the same (FPGA part)
That the Intel(Altera) FPGA VIP is the sole interface for the ARM
controller to connect to via memory mapping
on the DDR

Please go to Source Functional Description section in the PDF below. It
has information
on how the encoder is built for the FPGA design of the Display Port
https://www.altera.com/ja_JP/pdfs/literature/ug/ug_displayport.pdf

More information on the Display Port IP encoder could be found in the
link below.
The Tx Transceiver interface has some information on how the source
clocks works in
the FPGA tranceiver
https://www.altera.com/documentation/hco1410462777019.html#hco141046232
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