From owner-freebsd-bugs@FreeBSD.ORG Wed Nov 12 12:35:08 2014 Return-Path: Delivered-To: freebsd-bugs@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 186966FB for ; Wed, 12 Nov 2014 12:35:08 +0000 (UTC) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id DA779A93 for ; Wed, 12 Nov 2014 12:35:07 +0000 (UTC) Received: from bugs.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.14.9/8.14.9) with ESMTP id sACCZ7Rc074590 for ; Wed, 12 Nov 2014 12:35:07 GMT (envelope-from bugzilla-noreply@freebsd.org) From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 194966] New: Radeon KMS driver lack power and clocks management support Date: Wed, 12 Nov 2014 12:35:07 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 10.1-RC2 X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Many People X-Bugzilla-Who: zuborg@gmail.com X-Bugzilla-Status: Needs Triage X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-bugs@FreeBSD.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter attachments.created Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 12 Nov 2014 12:35:08 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=194966 Bug ID: 194966 Summary: Radeon KMS driver lack power and clocks management support Product: Base System Version: 10.1-RC2 Hardware: Any OS: Any Status: Needs Triage Severity: Affects Many People Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: zuborg@gmail.com Created attachment 149319 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=149319&action=edit Patch /sys/dev/drm2/. radeonkms driver change device sclk and mclk when initializing according to drm.force_sclk and drm.force_mclk loader.conf tuneables Radeon KMS driver initialize hardware in default 'performance' mode, which cause significant noise and power consumption. Following patch adds rudimentary support of engine/memory clocks management. Immediately after initialization driver looks at value of drm.force_sclk and drm.force_mclk variables (tuneable via loader.conf). If non-zero value specified driver call radeon_set_engine_clock()/radeon_set_memory_clock() to adjust clocks setting. Boundary checks are not performed, it should be used with care! Actually it would be significantly better to add direct support of clocks/voltage values by `sysctl` on the fly, not only via loader.conf as in proposed patch. Patch was tested, values (in MHz) drm.force_sclk=250 drm.force_mclk=250 reduce noise of card fan very noticeable. -- You are receiving this mail because: You are the assignee for the bug.