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Date: Sat, 29 Nov 2014 19:27:52 +0100 From: Gabriele Mazzotta <gabriele.mzt@...il.com> To: Pali Rohár <pali.rohar@...il.com> Cc: Guenter Roeck <linux@...ck-us.net>, Arnd Bergmann <arnd@...db.de>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Steven Honeyman <stevenhoneyman@...il.com>, linux-kernel@...r.kernel.org Subject: Re: [PATCH] i8k: Add support for temperature sensor labels On Saturday 29 November 2014 18:18:18 Pali Rohár wrote: > On Saturday 29 November 2014 18:07:19 Gabriele Mazzotta wrote: > > On Saturday 29 November 2014 17:09:35 Pali Rohár wrote: > > > On Saturday 29 November 2014 17:04:07 Pali Rohár wrote: > > > > This patch adds labels for temperature sensors if SMM > > > > function with EAX register 0x11a3 reports it. These > > > > informations was taken from DOS binary NBSVC.MDM. > > > > > > > > Signed-off-by: Pali Rohár <pali.rohar@...il.com> > > > > --- > > > > > > > > drivers/char/i8k.c | 110 > > > > > > > > +++++++++++++++++++++++++++++++++++++++++----------- 1 > > > > file changed, 88 insertions(+), 22 deletions(-) > > > > > > I tested patch on Latitude E6440 and i8k CPU & GPU temps > > > match intel coretemp & amd radeion temps. > > > > > > But I would like if somebody with other Dell laptop can test > > > if temperature labels are correct... > > > > I tested it on my XPS13 9333, here what sensors outputs: > > > > acpitz-virtual-0 > > Adapter: Virtual device > > temp1: +27.8°C (crit = +105.0°C) > > temp2: +29.8°C (crit = +105.0°C) > > > > coretemp-isa-0000 > > Adapter: ISA adapter > > Physical id 0: +62.0°C (high = +100.0°C, crit = +100.0°C) > > Core 0: +62.0°C (high = +100.0°C, crit = +100.0°C) > > Core 1: +61.0°C (high = +100.0°C, crit = +100.0°C) > > > > i8k-virtual-0 > > Adapter: Virtual device > > fan2: 0 RPM > > CPU: +62.0°C > > Ambient: +49.0°C > > SODIMM: +46.0°C > > temp4: N/A > > > > CPU seems to be correct, but I can't say anything on Ambient > > and SODIMM. temp4 is constantly equal to SODIMM without this > > patch, so I'd say N/A is correct. > > > > > > Gabriele > > It is unknown for me how to directly read Ambient and SODIMM > temperatures (without Dell SMM functions). So we can only trust > Dell SMM that it reporting correct values and type is really > Ambient and SODIMM. > > And about temp4: > > Label is not set when SMM function fails. Original DOS NBSVC.MDM > just ignore all sensors for which SMM type function fails. > > This patch should not disable any sensor, so if you previously > had some value (<= 128°C) and now not, then there is some bug. > > Can you test this patch? > https://git.kernel.org/cgit/linux/kernel/git/gregkh/char-misc.git/comm > it/?h=char-misc-testing&id=723493ca59c8d81fed3e7f261165fee493a29ffa > > It is possible that same value is caused by incorrect use of > prev[] array which should be fixed by above patch. > > Can you test i8k with and without above patch? I did some more tests. What I think is happening is that temp4_label returns -22, so I sensors prints N/A without actually reading temp4_input. I'm doing some tests to understand what's going on with temp4_input. It reports the value of the last temp*_input I read. If I read it right after I loaded i8k, I get an error (-22). The same doesn't happen for temp3_label, which constantly returns -22. I already had https://git.kernel.org/cgit/linux/kernel/git/gregkh/char-misc.git/commit/?h=char-misc-testing&id=723493ca59c8d81fed3e7f261165fee493a29ffa applied. Without it, things seem not to change much. I either get an error (-22) or some incorrect values (for now always 1000) when I read temp4_input right after i8k was loaded. Once I read some other temp*_input, I always get the last value read. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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