From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755303AbaBGMZ4 (ORCPT ); Fri, 7 Feb 2014 07:25:56 -0500 Received: from youngberry.canonical.com ([91.189.89.112]:42132 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752910AbaBGLvM (ORCPT ); Fri, 7 Feb 2014 06:51:12 -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 3.11 151/233] drm/radeon/dpm: disable mclk switching on desktop RV770 Date: Fri, 7 Feb 2014 11:46:10 +0000 Message-Id: <1391773652-25214-152-git-send-email-luis.henriques@canonical.com> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1391773652-25214-1-git-send-email-luis.henriques@canonical.com> References: <1391773652-25214-1-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 3.11.10.4 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Alex Deucher commit 8097d94116d0c17e774ba4c8256e774018dc2a46 upstream. Mclk switching doesn't seem to work reliably on these cards. Most RV770 boards specify the same mclk for all performance levels anyway so in most cases, this has no affect. Bug: https://bugs.freedesktop.org/show_bug.cgi?id=73067 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 4f17b31..a923ba9 100644 --- a/drivers/gpu/drm/radeon/rv770_dpm.c +++ b/drivers/gpu/drm/radeon/rv770_dpm.c @@ -2536,6 +2536,12 @@ bool rv770_dpm_vblank_too_short(struct radeon_device *rdev) (rdev->pdev->subsystem_device == 0x1c42)) switch_limit = 200; + /* RV770 */ + /* mclk switching doesn't seem to work reliably on desktop RV770s */ + if ((rdev->family == CHIP_RV770) && + !(rdev->flags & RADEON_IS_MOBILITY)) + switch_limit = 0xffffffff; /* disable mclk switching */ + if (vblank_time < switch_limit) return true; else -- 1.8.3.2