Hi David,
On Thu, 29 Nov 2012 11:00:21 -0700, David Hubbard wrote:
> Hi Jean,
>
> On Thu, Nov 29, 2012 at 4:48 AM, Jean Delvare <khali@xxxxxxxxxxxx> wrote:
> > On Thu, 29 Nov 2012 03:09:01 -0700, David Hubbard wrote:
> >> + * at all, not sure about the IT8728F or IT8603E
> >> + * (IT8603E - "hwmon_vid: Unknown VRM version of your x86 CPU"
> >> + * and cpu0_vid reads as 0)
> >
> > This has nothing to do with the IT8603E but only with your CPU. Which
> > kernel version are you running, and can we see (one entry in)
> > your /proc/cpuinfo?
>
> Yes. I am most interested in the datasheet, but I appreciate your help
> to tweak the it87 driver as a fallback.
>
> $ uname -a
> Linux f2a85 3.6.6-gentoo #13 SMP Wed Nov 28 22:29:55 MST 2012 x86_64
> AMD A10-5800K APU with Radeon(tm) HD Graphics AuthenticAMD GNU/Linux
>
> $ cat /proc/cpuinfo
> processor : 0
> vendor_id : AuthenticAMD
> cpu family : 21
> model : 16
> model name : AMD A10-5800K APU with Radeon(tm) HD Graphics
> stepping : 1
We do not support any VID decoding since family 10h CPUs for AMD:
{X86_VENDOR_AMD, 0x10, 0x0, ANY, ANY, 25}, /* NPT family 10h */
Starting with family 11h CPUs, AMD has given up on parallel VID in
favor of serial VID which uses only 2 pins. I know that the IT8720F has
support for this, but I did not find any trace in other ITE datasheets.
The serial VID uses 7-bit codes which are incompatible with the
previous 6-bit parallel VID codes used by family 10h CPUs. BTW the
family 10h CPUs already supported serial VID, and I have no idea how to
support that properly as hwmon-vid has no idea whether the code came
from the serial or parallel VID interface.
The following should at least get rid of the warning in the kernel logs:
* * * * *
Since family 11h processors, AMD is exclusively using 7-bit VID codes
transmitted using a serial protocol over two pins (clock and data.)
Signed-off-by: Jean Delvare <khali@xxxxxxxxxxxx>
---
drivers/hwmon/hwmon-vid.c | 10 ++++++++++
1 file changed, 10 insertions(+)
--- linux-3.7-rc8.orig/drivers/hwmon/hwmon-vid.c 2012-10-20 21:11:32.000000000 +0200
+++ linux-3.7-rc8/drivers/hwmon/hwmon-vid.c 2012-12-12 15:36:36.309882929 +0100
@@ -115,6 +115,12 @@ int vid_from_reg(int val, u8 vrm)
return (val < 32) ? 1550 - 25 * val
: 775 - (25 * (val - 31)) / 2;
+ case 26: /* AMD family 10h to 15h, serial VID */
+ val &= 0x7f;
+ if (val >= 0x7c)
+ return 0;
+ return DIV_ROUND_CLOSEST(15500 - 125 * val, 10);
+
case 91: /* VRM 9.1 */
case 90: /* VRM 9.0 */
val &= 0x1f;
@@ -195,6 +201,10 @@ static struct vrm_model vrm_models[] = {
{X86_VENDOR_AMD, 0xF, 0x40, 0x7F, ANY, 24}, /* NPT family 0Fh */
{X86_VENDOR_AMD, 0xF, 0x80, ANY, ANY, 25}, /* future fam. 0Fh */
{X86_VENDOR_AMD, 0x10, 0x0, ANY, ANY, 25}, /* NPT family 10h */
+ {X86_VENDOR_AMD, 0x11, 0x0, ANY, ANY, 26}, /* family 11h */
+ {X86_VENDOR_AMD, 0x12, 0x0, ANY, ANY, 26}, /* family 12h */
+ {X86_VENDOR_AMD, 0x14, 0x0, ANY, ANY, 26}, /* family 14h */
+ {X86_VENDOR_AMD, 0x15, 0x0, ANY, ANY, 26}, /* family 15h */
{X86_VENDOR_INTEL, 0x6, 0x0, 0x6, ANY, 82}, /* Pentium Pro,
* Pentium II, Xeon,
Also available as a standalone driver at:
http://khali.linux-fr.org/devel/misc/hwmon-vid/
--
Jean Delvare
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