Date: Wed, 18 Oct 2017 12:42:42 +0100 From: tech-lists <tech-lists@zyxst.net> To: freebsd-hardware@freebsd.org, freebsd-mobile@freebsd.org Subject: Re: problems getting AMD C-70 APU working with powerd/cpufreq Message-ID: <20171018114241.GA991@desktop.parsley.growveg.org> In-Reply-To: <b11ac2c5-eb75-363a-33b2-6580ed05e79f@yahoo.com> References: <20171013123721.GA27736@acer.zyxst.net> <20171014215317.K34192@sola.nimnet.asn.au> <20171014212602.GB92751@acer.zyxst.net> <20171016013155.I34192@sola.nimnet.asn.au> <20171016121735.GA73795@acer.zyxst.net> <b11ac2c5-eb75-363a-33b2-6580ed05e79f@yahoo.com>
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On Tue, Oct 17, 2017 at 06:23:06PM -0400, Anthony Jenkins wrote: >cpufreq(4) does not support AMD processor family 0x14 (20), which I >believe your dmesg showed your processor to be. aha! >I had added support for controlling the frequency on some later AMD >families last year, but the AMD documentation for the 0x14 family is >pretty complicated for my tiny brain. The other families control >processor frequency with a single register, but AFACT you use P-states >on family 0x14. You can have up to 8 P-states, each of which specifies >a power/frequency configuration. If someone could point me to a >reference for controlling the frequency for this family, I could submit >something for review...no idea what Linux does for this family. Would it help if I were to get hardware output from booting temporarily to linux mint? many thanks, -- J.
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