[PATCH] drm: lcdif: change burst size to 256B

Marco Felsch m.felsch at pengutronix.de
Thu Oct 27 08:16:06 UTC 2022


On 22-10-27, Marek Vasut wrote:
> On 10/27/22 10:04, Marco Felsch wrote:
> > Hi Marek,
> 
> Hi,
> 
> > On 22-10-26, Marek Vasut wrote:
> > > On 7/26/22 11:43, Marco Felsch wrote:
> > > > FIFO underruns are seen if a AXI bus master with a higher priority do a
> > > > lot of memory access. Increase the burst size to 256B to avoid such
> > > > underruns and to improve the memory access efficiency.
> > > > 
> > > > Signed-off-by: Marco Felsch <m.felsch at pengutronix.de>
> > > 
> > > Uh, this fell through the cracks, sorry.
> > > 
> > > Can you please collect my RB, add:
> > > 
> > > Fixes: 9db35bb349a0 ("drm: lcdif: Add support for i.MX8MP LCDIF variant")
> > > 
> > > and send V2 ?
> > > 
> > > btw. the Panic mode seems to work on this IP with 4k displays and HDMI.
> > 
> > Sounds interesting, how did you verified that?
> 
> I plugged in a 4k panel into MX8MP HDMI port and saw this flicker, with the
> panic regs programmed correctly, there is no more flicker, see the commit
> messages of patch I posted yesterday for details, you were on CC:
> 
> [PATCH] drm: lcdif: Set and enable FIFO Panic threshold

Yes, this was later in my inbox.. sorry for the noise.

Regards,
  Marco


More information about the dri-devel mailing list