From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 590F5C2D0D1 for ; Sun, 29 Dec 2019 18:08:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 34F1C207FD for ; Sun, 29 Dec 2019 18:08:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1577642930; bh=gh4zcnNIyWIMJrFu26zdLw3eaIby5AewDYGnPymTE7g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=SnCQOaAL/eLcMYE5IuCG2cl1A23hVWWAz+VuWKpHR9HLEMQNOzvak8chdKAzTPiGZ s4RGourpov/nJfz4cXKz8gOtmdmhkIzQvig7iOkknH94SFmAMUJfO0sV17dgoB7wiY Vxseo+ZmBdIYeZIk2STjKu2dTigOC/qUaKIr5R7k= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731165AbfL2Rq4 (ORCPT ); Sun, 29 Dec 2019 12:46:56 -0500 Received: from mail.kernel.org ([198.145.29.99]:57128 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731161AbfL2Rqz (ORCPT ); Sun, 29 Dec 2019 12:46:55 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8C6DC20718; Sun, 29 Dec 2019 17:46:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1577641615; bh=gh4zcnNIyWIMJrFu26zdLw3eaIby5AewDYGnPymTE7g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=II7W7afVXFVTBtc+KYMU0G070A/IEd9A0E1W4xI44EFqEnW3mZ5LBAJovLd6id3j1 1P5Vr86qjiHdQrWQKrc9jOsRR2Uqlu6g/CLiryHNwa7De5qw+szsRzKHf3buF7Cdit 0NCEvaH4MhlJObsAPDrw57aeMnbo2124ShIBj324= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, David Galiffi , Jun Lei , Bhawanpreet Lakha , Alex Deucher , Sasha Levin Subject: [PATCH 5.4 138/434] drm/amd/display: Fix dongle_caps containing stale information. Date: Sun, 29 Dec 2019 18:23:11 +0100 Message-Id: <20191229172710.891593989@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20191229172702.393141737@linuxfoundation.org> References: <20191229172702.393141737@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: David Galiffi [ Upstream commit dd998291dbe92106d8c4a7581c409b356928d711 ] [WHY] During detection: function: get_active_converter_info populates link->dpcd_caps.dongle_caps only when dpcd_rev >= DPCD_REV_11 and DWN_STRM_PORTX_TYPE is DOWN_STREAM_DETAILED_HDMI or DOWN_STREAM_DETAILED_DP_PLUS_PLUS. Otherwise, it is not cleared, and stale information remains. During mode validation: function: dp_active_dongle_validate_timing reads link->dpcd_caps.dongle_caps->dongle_type to determine the maximum pixel clock to support. This information is now stale and no longer valid. [HOW] dp_active_dongle_validate_timing should be using link->dpcd_caps->dongle_type instead. Signed-off-by: David Galiffi Reviewed-by: Jun Lei Acked-by: Bhawanpreet Lakha Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/display/dc/core/dc_link.c | 2 +- drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 1 + 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c index de1b61595ffb..efc1d30544bb 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c @@ -2219,7 +2219,7 @@ static bool dp_active_dongle_validate_timing( break; } - if (dongle_caps->dongle_type != DISPLAY_DONGLE_DP_HDMI_CONVERTER || + if (dpcd_caps->dongle_type != DISPLAY_DONGLE_DP_HDMI_CONVERTER || dongle_caps->extendedCapValid == false) return true; diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c index 9e261dbf2e49..5a583707d198 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c @@ -2545,6 +2545,7 @@ static void get_active_converter_info( uint8_t data, struct dc_link *link) { union dp_downstream_port_present ds_port = { .byte = data }; + memset(&link->dpcd_caps.dongle_caps, 0, sizeof(link->dpcd_caps.dongle_caps)); /* decode converter info*/ if (!ds_port.fields.PORT_PRESENT) { -- 2.20.1