Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761075AbaJDAMd (ORCPT ); Fri, 3 Oct 2014 20:12:33 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:45712 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756048AbaJCVxO (ORCPT ); Fri, 3 Oct 2014 17:53:14 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Alex Deucher Subject: [PATCH 3.14 021/238] drm/radeon: enable bapm by default on desktop TN/RL boards Date: Fri, 3 Oct 2014 14:28:56 -0700 Message-Id: <20141003212914.338692309@linuxfoundation.org> X-Mailer: git-send-email 2.1.2 In-Reply-To: <20141003212913.680985295@linuxfoundation.org> References: <20141003212913.680985295@linuxfoundation.org> User-Agent: quilt/0.63-1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Alex Deucher commit 0c78a44964db3d483b0c09a8236e0fe123aa9cfc upstream. bapm enabled the GPU and CPU to share TDP headroom. It was disabled by default since some laptops hung when it was enabled in conjunction with dpm. It seems to be stable on desktop boards and fixes hangs on boot with dpm enabled on certain boards, so enable it by default on desktop boards. bug: https://bugs.freedesktop.org/show_bug.cgi?id=72921 Signed-off-by: Alex Deucher Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/radeon/trinity_dpm.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) --- a/drivers/gpu/drm/radeon/trinity_dpm.c +++ b/drivers/gpu/drm/radeon/trinity_dpm.c @@ -1877,7 +1877,15 @@ int trinity_dpm_init(struct radeon_devic for (i = 0; i < SUMO_MAX_HARDWARE_POWERLEVELS; i++) pi->at[i] = TRINITY_AT_DFLT; - pi->enable_bapm = false; + /* There are stability issues reported on latops with + * bapm installed when switching between AC and battery + * power. At the same time, some desktop boards hang + * if it's not enabled and dpm is enabled. + */ + if (rdev->flags & RADEON_IS_MOBILITY) + pi->enable_bapm = false; + else + pi->enable_bapm = true; pi->enable_nbps_policy = true; pi->enable_sclk_ds = true; pi->enable_gfx_power_gating = true; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/