From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:56164 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751957AbdFLHyc (ORCPT ); Mon, 12 Jun 2017 03:54:32 -0400 Subject: Patch "drm/amdgpu/ci: disable mclk switching for high refresh rates (v2)" has been added to the 4.11-stable tree To: alexander.deucher@amd.com, christian.koenig@amd.com, gregkh@linuxfoundation.org Cc: , From: Date: Mon, 12 Jun 2017 09:54:20 +0200 Message-ID: <149725406021470@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled drm/amdgpu/ci: disable mclk switching for high refresh rates (v2) to the 4.11-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: drm-amdgpu-ci-disable-mclk-switching-for-high-refresh-rates-v2.patch and it can be found in the queue-4.11 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 0a646f331db0eb9efc8d3a95a44872036d441d58 Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Thu, 11 May 2017 13:10:02 -0400 Subject: drm/amdgpu/ci: disable mclk switching for high refresh rates (v2) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Alex Deucher commit 0a646f331db0eb9efc8d3a95a44872036d441d58 upstream. Even if the vblank period would allow it, it still seems to be problematic on some cards. v2: fix logic inversion (Nils) bug: https://bugs.freedesktop.org/show_bug.cgi?id=96868 Acked-by: Christian König Signed-off-by: Alex Deucher Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/amd/amdgpu/ci_dpm.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/drivers/gpu/drm/amd/amdgpu/ci_dpm.c +++ b/drivers/gpu/drm/amd/amdgpu/ci_dpm.c @@ -906,6 +906,12 @@ static bool ci_dpm_vblank_too_short(stru u32 vblank_time = amdgpu_dpm_get_vblank_time(adev); u32 switch_limit = adev->mc.vram_type == AMDGPU_VRAM_TYPE_GDDR5 ? 450 : 300; + /* disable mclk switching if the refresh is >120Hz, even if the + * blanking period would allow it + */ + if (amdgpu_dpm_get_vrefresh(adev) > 120) + return true; + if (vblank_time < switch_limit) return true; else Patches currently in stable-queue which might be from alexander.deucher@amd.com are queue-4.11/drm-amdgpu-ci-disable-mclk-switching-for-high-refresh-rates-v2.patch