Hi, > -----Original Message----- > From: linux-omap-owner@xxxxxxxxxxxxxxx [mailto:linux-omap- > owner@xxxxxxxxxxxxxxx] On Behalf Of Menon, Nishanth > Sent: Wednesday, April 28, 2010 11:36 AM > To: Kevin Hilman > Cc: Ramirez Luna, Omar; Felipe Contreras; linux-omap; Ameya Palande; > Hiroshi Doyu; Felipe Contreras; Omar Ramirez Luna > Subject: Re: [PATCH v2] DSPBRIDGE: use dm timer framework for gpt timers > > Kevin Hilman had written, on 04/28/2010 11:29 AM, the following: > > Omar Ramirez Luna <omar.ramirez@xxxxxx> writes: > > > >> On 4/28/2010 2:46 AM, Felipe Contreras wrote: > >>> On Wed, Apr 28, 2010 at 4:29 AM, Omar Ramirez > Luna<omar.ramirez@xxxxxx> wrote: > >>>> This patch switches to use DM timer framework instead of > >>>> a custom one for GPT timers, currently dsp can make use of > >>>> gpt 5, 6, 7 or 8. > >>> I heard someone that was using gpt 8 for something else. Is it > >>> possible to configure dsp-bridge to not use it? > >>> > >> There are two scenarios: > >> > >> 1. The request comes from the DSP side (afaik for video use case), the > >> change should be in the DSP side binaries to request some other gpt > >> instead. I don't know how possible is to get this changed. > >> > >> 2. bridge driver also requests gpt8 whenever a mmu fault is triggered, > >> this to set a timer to interrupt the dsp after the mmu fault dump has > >> been finished, I think this can be easily replaced in bridge to use > >> some other gpt, but "1" is still there. (besides a new patch is needed > >> to remove direct access to dm timer inside ue_deh and make it to go > >> through dsp-clock) > > > > Why does Bridge care at all which specific timers it requests? They > > are all the same, with the exception of GPT1 which is in the WKUP > > powerdomain and already used as the kernel clocksource. > > > > Bridge should just use the generic _request() instead of > > _request_specific() > > > trouble I believe is that DSP BIOS uses a specific timer. DSP/BIOS uses GPT5 on bridge boot up, after that the GPT5 is released. The GPT6 is used in DSP Bridge for DSP CPU Load Monitoring. Regards, Armando. -- 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
