From patchwork Tue Jul 6 17:20:18 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuogee Hsieh X-Patchwork-Id: 470510 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=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, 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 46874C07E9C for ; Tue, 6 Jul 2021 17:21:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2DB0661C74 for ; Tue, 6 Jul 2021 17:21:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230479AbhGFRXu (ORCPT ); Tue, 6 Jul 2021 13:23:50 -0400 Received: from so254-9.mailgun.net ([198.61.254.9]:42780 "EHLO so254-9.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230442AbhGFRXt (ORCPT ); Tue, 6 Jul 2021 13:23:49 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1625592071; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=QT0rCAMjsSGPZ3jKRP4o9QdSlxRce5w6tIBucvgc3v4=; b=eLYyYy5sPufXdPuMletXSOBWxris/qBWI60thqEvSByBdKSxoK7sXw558kxbEFUkKbxIWGxG yRK/cMwa+s/FecOk8BQqWuW2LKAbllYUBnwUtorMtiVypTJ5HHN3oJLTpS1YS3XbaLAwAHM4 PTax0Epkfecon4w8FA11R6N7cbE= X-Mailgun-Sending-Ip: 198.61.254.9 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n07.prod.us-east-1.postgun.com with SMTP id 60e490f05e3e57240bcf4c6d (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Tue, 06 Jul 2021 17:20:48 GMT Sender: khsieh=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 35891C43145; Tue, 6 Jul 2021 17:20:48 +0000 (UTC) Received: from khsieh-linux1.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: khsieh) by smtp.codeaurora.org (Postfix) with ESMTPSA id BC46CC43149; Tue, 6 Jul 2021 17:20:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org BC46CC43149 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=fail smtp.mailfrom=khsieh@codeaurora.org From: Kuogee Hsieh To: dri-devel@lists.freedesktop.org, robdclark@gmail.com, sean@poorly.run, swboyd@chromium.org Cc: Kuogee Hsieh , abhinavk@codeaurora.org, aravindh@codeaurora.org, airlied@linux.ie, daniel@ffwll.ch, bjorn.andersson@linaro.org, linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [PATCH 5/7] drm/msm/dp: return correct edid checksum after corrupted edid checksum read Date: Tue, 6 Jul 2021 10:20:18 -0700 Message-Id: <1625592020-22658-6-git-send-email-khsieh@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1625592020-22658-1-git-send-email-khsieh@codeaurora.org> References: <1625592020-22658-1-git-send-email-khsieh@codeaurora.org> Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Response with correct edid checksum saved at connector after corrupted edid checksum read. This fixes Link Layer CTS cases 4.2.2.3, 4.2.2.6. Signed-off-by: Kuogee Hsieh --- drivers/gpu/drm/msm/dp/dp_panel.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/msm/dp/dp_panel.c b/drivers/gpu/drm/msm/dp/dp_panel.c index 88196f7..0fdb551 100644 --- a/drivers/gpu/drm/msm/dp/dp_panel.c +++ b/drivers/gpu/drm/msm/dp/dp_panel.c @@ -271,7 +271,7 @@ static u8 dp_panel_get_edid_checksum(struct edid *edid) { struct edid *last_block; u8 *raw_edid; - bool is_edid_corrupt; + bool is_edid_corrupt = false; if (!edid) { DRM_ERROR("invalid edid input\n"); @@ -303,7 +303,12 @@ void dp_panel_handle_sink_request(struct dp_panel *dp_panel) panel = container_of(dp_panel, struct dp_panel_private, dp_panel); if (panel->link->sink_request & DP_TEST_LINK_EDID_READ) { - u8 checksum = dp_panel_get_edid_checksum(dp_panel->edid); + u8 checksum; + + if (dp_panel->edid) + checksum = dp_panel_get_edid_checksum(dp_panel->edid); + else + checksum = dp_panel->connector->real_edid_checksum; dp_link_send_edid_checksum(panel->link, checksum); dp_link_send_test_response(panel->link);