Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753755AbaAMQCj (ORCPT ); Mon, 13 Jan 2014 11:02:39 -0500 Received: from youngberry.canonical.com ([91.189.89.112]:53065 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753591AbaAMQCP (ORCPT ); Mon, 13 Jan 2014 11:02:15 -0500 From: Luis Henriques To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Alex Deucher , Luis Henriques Subject: [PATCH 3.11 058/208] drm/radeon/dpm: disable ss on Cayman Date: Mon, 13 Jan 2014 15:58:19 +0000 Message-Id: <1389628849-1614-59-git-send-email-luis.henriques@canonical.com> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1389628849-1614-1-git-send-email-luis.henriques@canonical.com> References: <1389628849-1614-1-git-send-email-luis.henriques@canonical.com> X-Extended-Stable: 3.11 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.11.10.3 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Alex Deucher commit c745fe611ca42295c9d91d8e305d27983e9132ef upstream. Spread spectrum seems to cause hangs when dynamic clock switching is enabled. Disable it for now. This does not affect performance or the amount of power saved. Tracked down by Martin Andersson. bug: https://bugs.freedesktop.org/show_bug.cgi?id=69723 Signed-off-by: Alex Deucher Signed-off-by: Luis Henriques --- drivers/gpu/drm/radeon/rv770_dpm.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/gpu/drm/radeon/rv770_dpm.c b/drivers/gpu/drm/radeon/rv770_dpm.c index 4d50ca3..4f17b31 100644 --- a/drivers/gpu/drm/radeon/rv770_dpm.c +++ b/drivers/gpu/drm/radeon/rv770_dpm.c @@ -2333,6 +2333,12 @@ void rv770_get_engine_memory_ss(struct radeon_device *rdev) pi->mclk_ss = radeon_atombios_get_asic_ss_info(rdev, &ss, ASIC_INTERNAL_MEMORY_SS, 0); + /* disable ss, causes hangs on some cayman boards */ + if (rdev->family == CHIP_CAYMAN) { + pi->sclk_ss = false; + pi->mclk_ss = false; + } + if (pi->sclk_ss || pi->mclk_ss) pi->dynamic_ss = true; else -- 1.8.3.2 -- 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/