Em Thu, 13 Jul 2017 18:02:20 +0100 Kieran Bingham <kieran.bingham@xxxxxxxxxxxxxxxx> escreveu: > Hi Laurent, > > On 26/06/17 19:12, Laurent Pinchart wrote: > > When the display start interrupt occurs, we know that the hardware has > > finished loading the active display list. The driver then proceeds to > > recycle the list, assuming it won't be needed anymore. > > > > This assumption holds true for headerless display lists, as the VSP > > doesn't reload the list for the next frame if it hasn't changed. > > However, this isn't true anymore for header display lists, as they are > > loaded at every frame start regardless of whether they have been > > updated. > > > > To prepare for header display lists usage in display pipelines, we need > > to postpone recycling the list until it gets replaced by a new one > > through a page flip. The driver already does so in the frame end > > interrupt handler, so all we need is to skip list recycling in the > > display start interrupt handler. > > > > While the active list can be recycled at display start for headerless > > display lists, there's no real harm in postponing that to the frame end > > interrupt handler in all cases. This simplifies interrupt handling as we > > don't need to process the display start interrupt anymore. > > > > Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx> > > Ok, I had skipped this one as I was concerned about its effects in relation to > 11/14 but I see how that's working now. > > Reviewed-by: Kieran Bingham <kieran.bingham+renesas@xxxxxxxxxxxxxxxx> Acked-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxxx> Thanks, Mauro
