Re: DSS2: Simultaneous DSI and DPI panels

[Archit Taneja <archit@ti.com>]

Hi,

On Friday 13 May 2011 12:46 AM, Juha Kuikka wrote:
> Hello,
>
> I was wondering if it would be possible to run DPI and DSI interfaces
> simultaneously with OMAP3 (DM3730).
>
> Limitations:
> - DSI would have to be in video mode (data to DSI phy through video
> port with H/VSYNC signaling, OMAP_DSS_PARALLELMODE_BYPASS)
> - DSI PLL would need to be used for clock source
> - Both the DPI and DSI panels would have to accept identical clocking
> (PCLK, blanking intervals etc).
> - Data lane # must match.
> - And of course same data would go to both
>
> I realize the current SW does not support this, but I'm more wondering
> if it is possible from the HW point of view because it seems to me
> that data out from DISPC is pretty much identical in both cases.

I don't think this is possible on OMAP3, there is one LCD manager in 
OMAP3 which can either feed pixels to DPI or DSI.

The only way you could run 2 panels is by routing LCD manager's content 
to DPI, and use DSI's capability to do a system DMA directly and send 
the data to the panel(bypassing DISPC), I don't think the system DMA 
method will work with a video mode panel, only command mode panels will 
do here.

Archit
>
>   - Juha
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