From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tobias Jakobi Subject: Re: [PATCHv3 0/8] devfreq: Add generic exynos memory-bus frequency driver Date: Wed, 18 Feb 2015 21:59:44 +0100 Message-ID: <54E4FD40.8020206@gmx.net> References: <1420681257-3078-1-git-send-email-cw00.choi@samsung.com> <54DFE797.1020008@math.uni-bielefeld.de> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Return-path: Received: from mout.gmx.net ([212.227.17.22]:58804 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751649AbbBRVAD (ORCPT ); Wed, 18 Feb 2015 16:00:03 -0500 In-Reply-To: <54DFE797.1020008@math.uni-bielefeld.de> Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: Tobias Jakobi , Chanwoo Choi , myungjoo.ham@samsung.com, kgene@kernel.org Cc: kyungmin.park@samsung.com, rafael.j.wysocki@intel.com, mark.rutland@arm.com, a.kesavan@samsung.com, tomasz.figa@gmail.com, k.kozlowski@samsung.com, b.zolnierkie@samsung.com, robh+dt@kernel.org, inki.dae@samsung.com, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org Hello again, Tobias Jakobi wrote > I've tested the series on my Odroid-X2 (by adapting the TRATS2 changes), > and so far I haven't seen any issues. With the system being idle one can > see that the 'simple_ondemand' devfreq governor clocks down both memory > busses to the lowest state. looks I was too hasty the last time. Actually this series breaks HDMI output for me (or at least with 'simple_ondemand' governor, haven't tried with performance yet). I tried to run some simple application, but it hangs in uninterruptible sleep immediately, probably before the first page flip. Going to check this more thoroughly. Maybe some parts of the hdmi subsystem don't like the lower clocks? With best wishes, Tobias From mboxrd@z Thu Jan 1 00:00:00 1970 From: liquid.acid@gmx.net (Tobias Jakobi) Date: Wed, 18 Feb 2015 21:59:44 +0100 Subject: [PATCHv3 0/8] devfreq: Add generic exynos memory-bus frequency driver In-Reply-To: <54DFE797.1020008@math.uni-bielefeld.de> References: <1420681257-3078-1-git-send-email-cw00.choi@samsung.com> <54DFE797.1020008@math.uni-bielefeld.de> Message-ID: <54E4FD40.8020206@gmx.net> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hello again, Tobias Jakobi wrote > I've tested the series on my Odroid-X2 (by adapting the TRATS2 changes), > and so far I haven't seen any issues. With the system being idle one can > see that the 'simple_ondemand' devfreq governor clocks down both memory > busses to the lowest state. looks I was too hasty the last time. Actually this series breaks HDMI output for me (or at least with 'simple_ondemand' governor, haven't tried with performance yet). I tried to run some simple application, but it hangs in uninterruptible sleep immediately, probably before the first page flip. Going to check this more thoroughly. Maybe some parts of the hdmi subsystem don't like the lower clocks? With best wishes, Tobias