On Mon, 2010-04-12 at 13:47 +0200, ext Hiremath, Vaibhav wrote: > > -----Original Message----- > > From: Tomi Valkeinen [mailto:tomi.valkeinen@xxxxxxxxx] > > Sent: Thursday, April 01, 2010 7:12 PM > > To: Hiremath, Vaibhav > > Cc: linux-omap@xxxxxxxxxxxxxxx > > Subject: Re: [PATCH] OMAP: DSS2: GFX FIFO UNDERFLOW issue fixed > > > > On Mon, 2010-03-22 at 14:09 +0100, ext hvaibhav@xxxxxx wrote: > > > From: Vaibhav Hiremath <hvaibhav@xxxxxx> > > > > > > In case of 720P with 90/270 degree rotation, the system reports > > > GFX_FIFO_UNDERFLOW error which usually happens if DSS DMA is not able to > > fill > > > the FIFO as per requirement. > > > > > > In TRM (section 11.2.6.1.3), where is has been clearly mentioned that, > > > > > > "To improve the performance on 90 degree rotation, split the data access > > on > > > write side and not read side." > > > > > > That means, read should always happen on 0 degree and write should go to > > > respective rotation view. > > > > I haven't had time to look at this patch yet. I'll try to do it next > > week. > [Hiremath, Vaibhav] Tomi, > > Have you had a chance to look at this patch/issue? Sorry, no I haven't. It's on my list. But did you consider my explanation? Does your implementation support changing the rotation dynamically? 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
