2009/12/28 Luca Tettamanti <kronos...@gmail.com>:
> 2009/12/28 Alex Deucher <alexdeuc...@gmail.com>:
>> On Mon, Dec 28, 2009 at 5:53 AM, Luca Tettamanti <kronos...@gmail.com> wrote:
>>> On Sun, Dec 27, 2009 at 1:55 AM, Rafał Miłecki <zaj...@gmail.com> wrote:
>>>> W dniu 26 grudnia 2009 20:08 użytkownik Alex Deucher
>>>> <alexdeuc...@gmail.com> napisał:
>>>>> It may be that the engine doesn't like to be reclocked while it's
>>>>> running.  Perhaps we should use the GUI idle interrupt rather than
>>>>> vblanks to reclock the engine.
>>>>
>>>> Could you say something more about GUI idle interrupt, please?
>>>
>>> It's mentioned in the documentation of the IH (see r600.c); I guess
>>> it's enabled by GUI_IDLE_INT_ENABLE.
>>>
>>>> What is this, do we already have code for that?
>>>
>>> Unless there are more subtleties all is needed it to enabled the
>>> interrupt and catch it in r600_irq_process.
>>
>> That's pretty much it.  Pre-r6xx asics have a GUI interrupt as well.
>> I can look up the details for that if they are not already documented.
>
> I can't find a way to ack the interrupt; I see
> RADEON_GUI_IDLE_INT_TEST_ACK but I think it's for pre-r6xx cards,
> right?

You don't have to ACK it as the CP generates the interrupt in
software; similar to the sw interrupts used for fences.

Alex

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