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[23.128.96.18]) by mx.google.com with ESMTP id y6si12755192ilu.49.2021.11.01.02.47.02; Mon, 01 Nov 2021 02:47:13 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@linuxfoundation.org header.s=korg header.b=aN+uJ75G; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linuxfoundation.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234349AbhKAJsC (ORCPT + 99 others); Mon, 1 Nov 2021 05:48:02 -0400 Received: from mail.kernel.org ([198.145.29.99]:47992 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234069AbhKAJoD (ORCPT ); Mon, 1 Nov 2021 05:44:03 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 10997613A1; Mon, 1 Nov 2021 09:29:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1635758954; bh=4V7qoFImzIn0NxruFr6anX4bfZWvBmk8A0gaz+IFVx0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aN+uJ75GzZD4vFl7Xxhnw4960vN1lcakuLdg9IrELvpip7PcPAO5CY4xlngDvtlAh AJgy7AhR0LjI8F2AjZ6H+ccDHwE1JQFlH1pl5HMWDuW0qvVv/FG+4fDhZEddybtnlX +c6ZhCPFeZ74J+w4ddixCUYjHhBuLrYBkAmjWNUU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Nicholas Kazlauskas , Agustin Gutierrez Sanchez , Eric Yang , Daniel Wheeler , Alex Deucher Subject: [PATCH 5.14 052/125] drm/amd/display: increase Z9 latency to workaround underflow in Z9 Date: Mon, 1 Nov 2021 10:17:05 +0100 Message-Id: <20211101082543.040866268@linuxfoundation.org> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211101082533.618411490@linuxfoundation.org> References: <20211101082533.618411490@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Eric Yang commit 4835ea6c173a8d8dfbfdbb21c4cd987d12681610 upstream. [Why] Z9 latency is higher than when we originally tuned the watermark parameters, causing underflow. Increasing the value until the latency issues is resolved. Reviewed-by: Nicholas Kazlauskas Acked-by: Agustin Gutierrez Sanchez Signed-off-by: Eric Yang Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c @@ -217,8 +217,8 @@ struct _vcs_dpi_soc_bounding_box_st dcn3 .num_states = 5, .sr_exit_time_us = 9.0, .sr_enter_plus_exit_time_us = 11.0, - .sr_exit_z8_time_us = 402.0, - .sr_enter_plus_exit_z8_time_us = 520.0, + .sr_exit_z8_time_us = 442.0, + .sr_enter_plus_exit_z8_time_us = 560.0, .writeback_latency_us = 12.0, .dram_channel_width_bytes = 4, .round_trip_ping_latency_dcfclk_cycles = 106,