From: Dominik Brodowski <linux@brodo.de>
To: Hiroshi Miura <miura@da-cha.org>
Cc: Ducrot Bruno <ducrot@arm.linux.org.uk>, cpufreq@www.linux.org.uk
Subject: Re: [new] event mode on speedstep-smi.
Date: Fri, 5 Sep 2003 01:25:55 +0200 [thread overview]
Message-ID: <20030904232555.GA8650@brodo.de> (raw)
In-Reply-To: <87ekywzjvm.wl%miura@da-cha.org>
On Thu, Sep 04, 2003 at 11:52:13PM +0900, Hiroshi Miura wrote:
> Hi,
>
> from some BIOS document
> http://support.twinhead.com/CSD/CDROM/driver/p98TF/Bios/P98TF07.doc
> google cache
> http://www.google.co.jp/search?q=cache:_RdlAmnkI4wJ:support.twinhead.com/CSD/CDROM/driver/p98TF/Bios/P98TF07.doc
>
> "The modem wouldn't connect most of the time and if it did connect ,
> whenever a power status event happened with the speedstep applet,
> it would cause the modem to disconnect with the IST applet loaded."
>
> I find from this that IST SMI has some 'power status event' call.
>
> "Intel says that we need to implement an Event Port option in the
> BIOS to cut down on the amount of SMI events. Resolution
> 1.Upgrade the Registry, The IST polling mode will change from SMI mode
> to Event Port mode."
>
> This said we can use "Event Port mode" other than "SMI power status event".
>
> we are already has data about Event Port mode, that is
>
> from dmesgs,
> Panasonic Let's Note.
> IST_SMI: signature:0x47534943 command:0x008200b2 event:0x000f104a perf_level:0x07d00000
> SONY VAIO PCG-Z505VR/K
> IST_SMI: signature:0x47534943 command:0x008000b2 event:0x000000b3 perf_level:0x07d00100
> IBM ThinkPad T21 TYPE 2647-G2J
> IST_SMI: signature:0x47534943 command:0x008200b2 event:0x00c000b3 perf_level:0x07d00000
>
> I found that "event" low 16bit is io-port (in).
>
> perf_level: high 16bit is 0x07d0. this is 2000 in decimal.
> I think this means polling interval is 2000ms.
>
> This code is based on my original one.
> Ducrot, How about this?
Actually, I much preferred the original version of your driver. This "event"
stuff can either be done as a seperate governor (different file), or in
userspace (as Bruno has pointed out).
What do you think about the patches for your driver I sent you?
Dominik
next prev parent reply other threads:[~2003-09-04 23:25 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-04 14:52 [new] event mode on speedstep-smi Hiroshi Miura
2003-09-04 15:30 ` Ducrot Bruno
2003-09-04 23:40 ` Hiroshi Miura
2003-09-05 6:56 ` Dominik Brodowski
2003-09-05 13:07 ` Ducrot Bruno
2003-09-04 23:25 ` Dominik Brodowski [this message]
2003-09-04 23:53 ` Hiroshi Miura
2003-09-05 6:54 ` speedstep-smi into -ac ? Dominik Brodowski
2003-09-05 8:46 ` Ducrot Bruno
2003-09-07 18:55 ` Dominik Brodowski
2003-09-08 8:32 ` Ducrot Bruno
2003-09-08 9:23 ` Dominik Brodowski
2003-09-08 12:30 ` Ducrot Bruno
2003-09-05 14:51 ` [new] event mode on speedstep-smi Ducrot Bruno
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