From patchwork Tue Aug 3 16:25:13 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuogee Hsieh X-Patchwork-Id: 12416743 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,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 D2D2AC4338F for ; Tue, 3 Aug 2021 16:25:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B3C6C61037 for ; Tue, 3 Aug 2021 16:25:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233358AbhHCQZr (ORCPT ); Tue, 3 Aug 2021 12:25:47 -0400 Received: from so254-9.mailgun.net ([198.61.254.9]:51190 "EHLO so254-9.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233344AbhHCQZr (ORCPT ); Tue, 3 Aug 2021 12:25:47 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1628007936; h=Message-Id: Date: Subject: Cc: To: From: Sender; bh=lUeOCPrR13OHTaYKCt/w/DFsAJkjHb7mUobM2Op+tQE=; b=KCM2hHf8+fLebokymdj4gh0ZsEMsqPWStJ2KFqdDpaN/iATe318CvO2sqhPjZkKF/+OZBTeT mxRdNn1d1C2jVp16mqsrqI5bXHEoB1y5KD0h5OgkMTM71UUfzYBhGN+jnVJM5fL2gYV96Hqr mH+GyU4OhJtnY6bzyPqrtUmQjnI= 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 61096df2dc54451a533dd64f (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Tue, 03 Aug 2021 16:25:22 GMT Sender: khsieh=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 3BBA6C43144; Tue, 3 Aug 2021 16:25:22 +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 73DBBC433F1; Tue, 3 Aug 2021 16:25:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 73DBBC433F1 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 v3] drm/msm/dp: update is_connected status base on sink count at dp_pm_resume() Date: Tue, 3 Aug 2021 09:25:13 -0700 Message-Id: <1628007913-29892-1-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. Changes in v2: -- remove dp_get_sink_count() cand call drm_dp_read_sink_count() Changes in v3: -- delete status local variable from dp_pm_resume() Fixes: d9aa6571b28ba ("drm/msm/dp: check sink_count before update is_connected status") Signed-off-by: Kuogee Hsieh --- drivers/gpu/drm/msm/dp/dp_display.c | 18 +++++++++++++++--- 1 file changed, 15 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index 78c5301..0f39256 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -1313,7 +1313,7 @@ static int dp_pm_resume(struct device *dev) struct platform_device *pdev = to_platform_device(dev); struct msm_dp *dp_display = platform_get_drvdata(pdev); struct dp_display_private *dp; - u32 status; + int sink_count = 0; dp = container_of(dp_display, struct dp_display_private, dp_display); @@ -1327,14 +1327,26 @@ 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 sink conencted, do dpcd read sink count */ + if (dp_catalog_link_is_connected(dp->catalog)) { + sink_count = drm_dp_read_sink_count(dp->aux); + if (sink_count < 0) + sink_count = 0; + } + dp->link->sink_count = sink_count; /* * 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;