From patchwork Wed Jul 28 21:30:54 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuogee Hsieh X-Patchwork-Id: 12406797 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=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 8EBD1C4338F for ; Wed, 28 Jul 2021 21:31:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7699C6103E for ; Wed, 28 Jul 2021 21:31:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231585AbhG1VbL (ORCPT ); Wed, 28 Jul 2021 17:31:11 -0400 Received: from so254-9.mailgun.net ([198.61.254.9]:17678 "EHLO so254-9.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231829AbhG1VbL (ORCPT ); Wed, 28 Jul 2021 17:31:11 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1627507869; h=Message-Id: Date: Subject: Cc: To: From: Sender; bh=8GU+vW43+wxy/H5qJZhHIaz/iH3IimVPeFMIf+S1X7A=; b=FlvDZsaAQZb5uhhkjB6+Uc5wJiQql3SqcS7TYggmLyIxhEp3GkaMKCgUMYl/+TwHCcUMQq8o r1SEdtDASx1IbaN0/qDVPuY2jc7a16upJFv8ZWGPm4HA/cutb7sLXZSigUIhTbX1gkKExdn1 5BVYXv0ejaJGJhIJcqy3QzflQC8= 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 6101cc99e31d882d183fbee4 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Wed, 28 Jul 2021 21:31:05 GMT Sender: khsieh=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id B36D7C433F1; Wed, 28 Jul 2021 21:31:04 +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 19695C433F1; Wed, 28 Jul 2021 21:31:02 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 19695C433F1 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: robdclark@gmail.com, sean@poorly.run, swboyd@chromium.org, vkoul@kernel.org, agross@kernel.org, bjorn.andersson@linaro.org Cc: abhinavk@codeaurora.org, aravindh@codeaurora.org, khsieh@codeaurora.org, freedreno@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] drm/msm/dp: update is_connected status base on sink count at dp_pm_resume() Date: Wed, 28 Jul 2021 14:30:54 -0700 Message-Id: <1627507854-16733-1-git-send-email-khsieh@codeaurora.org> X-Mailer: git-send-email 2.7.4 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Currently at dp_pm_resume() is_connected state is decided base on hpd connection status only. This will put is_connected in wrongly "true" state at the scenario that dongle attached to DUT but without hmdi cable connecting to it. Fix this problem by adding read sink count from dongle and decided is_connected state base on both sink count and hpd connection status. Signed-off-by: Kuogee Hsieh --- drivers/gpu/drm/msm/dp/dp_display.c | 23 +++++++++++++++++++++-- 1 file changed, 21 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index 2b660e9..9bcb261 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -1308,6 +1308,17 @@ static int dp_display_remove(struct platform_device *pdev) return 0; } +static int dp_get_sink_count(struct dp_display_private *dp) +{ + u8 sink_count; + + sink_count = drm_dp_read_sink_count(dp->aux); + if (sink_count < 0) + return 0; + + return sink_count; +} + static int dp_pm_resume(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); @@ -1327,14 +1338,22 @@ static int dp_pm_resume(struct device *dev) dp_catalog_ctrl_hpd_config(dp->catalog); - status = dp_catalog_link_is_connected(dp->catalog); + /* + * set sink to normal operation mode -- D0 + * before dpcd read + */ + dp_link_psm_config(dp->link, &dp->panel->link_info, false); + if ((status = dp_catalog_link_is_connected(dp->catalog))) + dp->link->sink_count = dp_get_sink_count(dp); + else + dp->link->sink_count = 0; /* * can not declared display is connected unless * HDMI cable is plugged in and sink_count of * dongle become 1 */ - if (status && dp->link->sink_count) + if (dp->link->sink_count) dp->dp_display.is_connected = true; else dp->dp_display.is_connected = false;