On Wed, Apr 28, 2010 at 7:36 PM, Nishanth Menon <nm@xxxxxx> wrote: > 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. FTR, this is the conversation... I don't understand what PWM is, hopefully somebody else does: <av500> felipec: ping <felipec> av500: pong <av500> dspbridge uses GPT8 which is one of the PWM capable ones <av500> which is not so nice as my hw guy uses that PWM <av500> otoh, only GPT5-8 can deliver IRQ to DSP <av500> so I see code that handles 5-8, but somehow only GPT6 and GPT8 seem to be really used <felipec> av500: you are wondering if it could use GPT7 or something? <av500> yup <av500> GPT8 is unfortunately in the DSP and the PWM set <av500> DSP 5-8, PWM 8-11 <felipec> av500: I've no idea =/ <av500> felipec: ok, and who could? <felipec> that's for the mailing list I guess <av500> l-o? <felipec> yup <av500> k, thx <felipec> orbarron maybe <av500> orbarron: ^^^^^^^ Cheers. -- Felipe Contreras -- 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
