From patchwork Wed Aug 4 15:51:01 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuogee Hsieh X-Patchwork-Id: 492344 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 6A544C4338F for ; Wed, 4 Aug 2021 15:51:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4A69960F94 for ; Wed, 4 Aug 2021 15:51:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239212AbhHDPvq (ORCPT ); Wed, 4 Aug 2021 11:51:46 -0400 Received: from so254-9.mailgun.net ([198.61.254.9]:54792 "EHLO so254-9.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233011AbhHDPvp (ORCPT ); Wed, 4 Aug 2021 11:51:45 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1628092293; h=Message-Id: Date: Subject: Cc: To: From: Sender; bh=rA+vddmtsJ7Rtq3lbQ5qIf/Jl6SUyZWzSinop5veS4Y=; b=QH3qz/dIq4MjQ1h2ml1qK472gXxYilGC9M3aCsAdPzjTFPGGGcyRXj3rGrYgawgjHx8+Ay8b 7AkHHAgmIKAf7iiqA3ie1Q1ahCfhhrQjkemZSBi7lqYsHFU9cHtqBV/mATr5tvYRAZA+6xSC 82iXZxheGjNBfsJOKugvIrkKdao= 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-n05.prod.us-west-2.postgun.com with SMTP id 610ab776bcdc32aad384fcf4 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Wed, 04 Aug 2021 15:51:18 GMT Sender: khsieh=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 447B6C43460; Wed, 4 Aug 2021 15:51:18 +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 C1C61C433F1; Wed, 4 Aug 2021 15:51:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org C1C61C433F1 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 v4] drm/msm/dp: update is_connected status base on sink count at dp_pm_resume() Date: Wed, 4 Aug 2021 08:51:01 -0700 Message-Id: <1628092261-32346-1-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() Changes in v4: -- delete un necessary comment at 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 | 17 ++++++++++++++--- 1 file changed, 14 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..25fb4f8 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 +1327,25 @@ 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 (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;