> -----Original Message----- > From: Tomi Valkeinen [mailto:tomi.valkeinen@xxxxxxxxx] > Sent: Friday, March 05, 2010 9:25 AM > To: Aguirre, Sergio > Cc: Syrjala Ville (Nokia-D/Helsinki); linux-fbdev@xxxxxxxxxxxxxxx; linux- > omap@xxxxxxxxxxxxxxx > Subject: RE: [PATCH 4/4] DSS2: clear spurious SYNC_LOST_DIGIT interrupts > > On Fri, 2010-03-05 at 16:19 +0100, ext Aguirre, Sergio wrote: > > Hi Ville, > > > > > -----Original Message----- > > > From: linux-omap-owner@xxxxxxxxxxxxxxx [mailto:linux-omap- > > > owner@xxxxxxxxxxxxxxx] On Behalf Of ville.syrjala@xxxxxxxxx > > > Sent: Friday, March 05, 2010 7:26 AM > > > To: Tomi Valkeinen > > > Cc: linux-fbdev@xxxxxxxxxxxxxxx; linux-omap@xxxxxxxxxxxxxxx; Ville > Syrjälä > > > Subject: [PATCH 4/4] DSS2: clear spurious SYNC_LOST_DIGIT interrupts > > > > > > From: Ville Syrjälä <ville.syrjala@xxxxxxxxx> > > > > > > When DSS transitions from off mode to on VENC may generate a spurious > > > SYNC_LOST_DIGIT error. Just ack it when restoring the context. Also > > > restore IRQENABLE last to avoid triggering interrupts before the > > > context is fully restored. > > > > (Tomi or anyone can correct me if I'm wrong) > > > > AFAIK, The solution for spurious interrupts is to flush posted bus > writes during interrupt handling, which can be achieved by reading the > same register just after you have written it. > > > > Tomi, what do you think? > > That's a different spurious interrupt =). > > In this case the IRQ mechanism from CPU side is working fine, but VENC > is just spamming the error interrupts, for unknown reason. Ohh ok, I see. Thanks for clarifying. And sorry for the noise. I'm trying to learn about DSS subsystem, but I'm just a n00b for the moment :) Regards, Sergio > > Tomi > -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
