From owner-freebsd-current@freebsd.org  Mon Dec 21 05:03:42 2015
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Date: Mon, 21 Dec 2015 00:03:41 -0500
Message-ID: <CABquGzWp2cT=z5ftHvvJ1WDUBcN+qO38DmwyTY+W4+WDUHkorw@mail.gmail.com>
Subject: failure to enumerate AMD Carrizo boost states
From: Johannes Dieterich <dieterich.joh@gmail.com>
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Dear all,

I run CURRENT on a laptop with an AMD Carrizo (A12-8800B) which should
have multiple boost states (Pb) according to the official
specifications (see [1] and [2] pages 59 and 63). CURRENT fails to
enumerate them and therefore only runs at base clock.

A thread on freebsd-acpi [3] did unfortunately not help much, so I am
hoping that the wider audience here may help?

Thanks a lot for your time!

Johannes

[1] http://products.amd.com/en-us/search/APU/AMD-PRO-A-Series-Processors/AMD-PRO-A-Series-A12-APU-for-Laptops/AMD-PRO-A12-8800B-with-Radeon%E2%84%A2-R7-Graphics/164
[2] http://support.amd.com/TechDocs/50742_15h_Models_60h-6Fh_BKDG.pdf
[3] http://freebsd.1045724.n5.nabble.com/AMD-A12-8800B-ACPI-questions-turbo-mode-temp-zones-td6059935.html