From patchwork Mon Mar 29 07:56:13 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 412660 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 82489C433E6 for ; Mon, 29 Mar 2021 08:19:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 439DE6197C for ; Mon, 29 Mar 2021 08:19:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232979AbhC2IS5 (ORCPT ); Mon, 29 Mar 2021 04:18:57 -0400 Received: from mail.kernel.org ([198.145.29.99]:34262 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232731AbhC2IST (ORCPT ); Mon, 29 Mar 2021 04:18:19 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id BBA7961964; Mon, 29 Mar 2021 08:18:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1617005889; bh=7Sc1OyOci1CHmpOtVP7j7g8RKp0UJBJvi7kFlrNny1o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gu872omYUwdbA9UKZ61DqlNENdX2rsq8vGewNQwl3jgb3kQ/nmYs7kmje3NsS065D yjo7oJb2shYk3BTF4OvBZWnBVoesoMThUOKqfCQD7iXTXQDLZGtwFPflDjIKTZM9ey osACrW3UlosVqJwbHYEUxT6Fps6DEXogi3rD31O0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Daniel Wheeler , Sung Lee , Haonan Wang , Eryk Brol , Alex Deucher , Sasha Levin Subject: [PATCH 5.10 042/221] drm/amd/display: Revert dram_clock_change_latency for DCN2.1 Date: Mon, 29 Mar 2021 09:56:13 +0200 Message-Id: <20210329075630.584403283@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210329075629.172032742@linuxfoundation.org> References: <20210329075629.172032742@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Sung Lee [ Upstream commit b0075d114c33580f5c9fa9cee8e13d06db41471b ] [WHY & HOW] Using values provided by DF for latency may cause hangs in multi display configurations. Revert change to previous value. Tested-by: Daniel Wheeler Signed-off-by: Sung Lee Reviewed-by: Haonan Wang Acked-by: Eryk Brol Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c index b5fe2a008bd4..7ed4d7c8734f 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c @@ -295,7 +295,7 @@ struct _vcs_dpi_soc_bounding_box_st dcn2_1_soc = { .num_banks = 8, .num_chans = 4, .vmm_page_size_bytes = 4096, - .dram_clock_change_latency_us = 11.72, + .dram_clock_change_latency_us = 23.84, .return_bus_width_bytes = 64, .dispclk_dppclk_vco_speed_mhz = 3600, .xfc_bus_transport_time_us = 4,