From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ben Widawsky Subject: Re: [RFC] Unified DRM GPU frequency knobs Date: Sun, 9 Sep 2012 12:59:20 -0700 Message-ID: <20120909125920.5816b189@bwidawsk.net> References: <20120909124255.288864aa@bwidawsk.net> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20120909124255.288864aa@bwidawsk.net> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org Errors-To: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org To: DRI Devel Cc: Intel GFX , jacob.jun.pan@linux.intel.com, arjan@linux.intel.com List-Id: dri-devel@lists.freedesktop.org On Sun, 9 Sep 2012 12:42:55 -0700 Ben Widawsky wrote: > On the Intel driver we've developed and reviewed some patches which > enable GPU frequency settings in sysfs. Similar interfaces have > existed for some time in our debugfs, but now we're getting interest > from users like PowerTOP and have decided to formalize it. Most > likely other DRM drivers have similar features; and perhaps similar > proposals have gone out in the past. > > Boiling down what we've exposed in our patches: > read current GPU frequency > read/write min frequency > read/write max frequency > read HW support lowest frequency (we call this RPn) > read HW supported highest frequency (we call this RP0) > read HW recommended low frequnecy (we call this RP1) > > If no interest is perceived we will move forward with these as Intel > only sysfs interfaces. > > The Intel specific patches which are ready to go are here: > http://lists.freedesktop.org/archives/intel-gfx/2012-September/020342.html > > Thanks. > I was called out for not being clear. I'm asking if there is interest in making unified knobs in DRM as opposed to driver specific knobs. Is that even a good idea, and/or make sense to do? -- Ben Widawsky, Intel Open Source Technology Center