> -----Original Message----- > From: Hiremath, Vaibhav > Sent: Friday, November 26, 2010 5:34 PM > To: 'Måns Rullgård'; [email protected] > Subject: RE: OMAP:DSS: possible bug in WAITFOR_VSYNC ioctl > > > -----Original Message----- > > From: [email protected] [mailto:linux-omap- > > [email protected]] On Behalf Of Måns Rullgård > > Sent: Friday, November 26, 2010 2:09 PM > > To: [email protected] > > Subject: Re: OMAP:DSS: possible bug in WAITFOR_VSYNC ioctl > > > > "Hiremath, Vaibhav" <[email protected]> writes: > > > > >> -----Original Message----- > > >> From: Ville Syrjälä [mailto:[email protected]] > > >> Sent: Wednesday, November 24, 2010 10:01 PM > > >> To: Hiremath, Vaibhav > > >> Cc: Tomi Valkeinen; [email protected] > > >> Subject: Re: OMAP:DSS: possible bug in WAITFOR_VSYNC ioctl > > >> > > >> On Wed, Nov 24, 2010 at 03:39:44PM +0530, ext Hiremath, Vaibhav > wrote: > > >> > > > >> > > -----Original Message----- > > >> > > From: Tomi Valkeinen [mailto:[email protected]] > > >> > > Sent: Wednesday, November 24, 2010 2:28 PM > > >> > > To: Hiremath, Vaibhav > > >> > > Cc: [email protected] > > >> > > Subject: Re: OMAP:DSS: possible bug in WAITFOR_VSYNC ioctl > > >> > > > > >> > > On Tue, 2010-11-23 at 23:46 +0530, ext Hiremath, Vaibhav wrote: > > >> > > > Hi, > > > <snip> > > >> > <snip..> > > > > As far as WAITFORGO is concerned, I think GO bit concept is > > > something OMAP notion/term and doesn't make sense to standardize > > > it. Atleast I am not aware of any other architecture having GO bit. > > > > Naming is minor detail. Feel free to suggest a better one. > > > [Hiremath, Vaibhav] If I fail to convince on this, then I think the only > left option is to make WAITFORGO ioctl generic. And put a disclaimer on > WAITFORVSYNC, it must not be used in panning use-case. > > [Hiremath, Vaibhav] Also let me bring another point here,
If I understand correctly most of the application libraries (DirectFB, X, etc..) does use FBIO_WAITFORVSYNC to synchronize with HW, and manage ping pong mechanism. With this finding, in case of OMAP3 we have to use OMAPFB_WAITFORGO (breaking standard applications). Thanks, Vaibhav > > -- > > Måns Rullgård > > [email protected] > > > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-omap" in > > the body of a message to [email protected] > > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
