From patchwork Thu Aug 5 20:44:54 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuogee Hsieh X-Patchwork-Id: 12422073 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 8724BC4320A for ; Thu, 5 Aug 2021 20:45:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6AA8B61154 for ; Thu, 5 Aug 2021 20:45:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241261AbhHEUqI (ORCPT ); Thu, 5 Aug 2021 16:46:08 -0400 Received: from so254-9.mailgun.net ([198.61.254.9]:27582 "EHLO so254-9.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241259AbhHEUqH (ORCPT ); Thu, 5 Aug 2021 16:46:07 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1628196353; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=QT0rCAMjsSGPZ3jKRP4o9QdSlxRce5w6tIBucvgc3v4=; b=QsffWjL9drUffP5X+J+5EDCP4u5k5WnDxKVvBbMdhr/craTLwV5Ufl08vzWqYTqMqtlTMTyk kFTb+NFYF4EMHc/D7F6oyUu9j0yWjMHzRtJ3tPc+qlskCEjx1nGm6uKDF49D3812vXavQq6U T8Zpia0ynzqMMfFhLs/t0bFtGBY= 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-n01.prod.us-west-2.postgun.com with SMTP id 610c4dff3f14248172a2aa03 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Thu, 05 Aug 2021 20:45:51 GMT Sender: khsieh=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 25ECFC43148; Thu, 5 Aug 2021 20:45:50 +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 292FFC433F1; Thu, 5 Aug 2021 20:45:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 292FFC433F1 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 v3 5/6] drm/msm/dp: return correct edid checksum after corrupted edid checksum read Date: Thu, 5 Aug 2021 13:44:54 -0700 Message-Id: <1628196295-7382-6-git-send-email-khsieh@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1628196295-7382-1-git-send-email-khsieh@codeaurora.org> References: <1628196295-7382-1-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 Reviewed-by: Stephen Boyd --- 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);