Re: [PATCH 2/3] [media] tc358743: Increase FIFO level to 300.

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Em Tue, 19 Sep 2017 17:24:45 +0200
Philipp Zabel <p.zabel@xxxxxxxxxxxxxx> escreveu:

> Hi Dave,
> 
> On Tue, 2017-09-19 at 14:08 +0100, Dave Stevenson wrote:
> > The existing fixed value of 16 worked for UYVY 720P60 over
> > 2 lanes at 594MHz, or UYVY 1080P60 over 4 lanes. (RGB888
> > 1080P60 needs 6 lanes at 594MHz).
> > It doesn't allow for lower resolutions to work as the FIFO
> > underflows.
> > 
> > Using a value of 300 works for all resolutions down to VGA60,
> > and the increase in frame delay is <4usecs for 1080P60 UYVY
> > (2.55usecs for RGB888).
> > 
> > Signed-off-by: Dave Stevenson <dave.stevenson@xxxxxxxxxxxxxxx>  
> 
> Can we increase this to 320? This would also allow
> 720p60 at 594 Mbps / 4 lanes, according to the xls.

Hmm... if this is dependent on the resolution and frame rate, wouldn't
it be better to dynamically adjust it accordingly?

Regards,
Maur

Thanks,
Mauro



[Index of Archives]     [Linux Input]     [Video for Linux]     [Gstreamer Embedded]     [Mplayer Users]     [Linux USB Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [Yosemite Backpacking]
  Powered by Linux