From patchwork Fri Apr 16 20:27:57 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuogee Hsieh X-Patchwork-Id: 12208743 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=-16.7 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 1203FC43460 for ; Fri, 16 Apr 2021 20:28:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CEF80613CE for ; Fri, 16 Apr 2021 20:28:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244908AbhDPU2k (ORCPT ); Fri, 16 Apr 2021 16:28:40 -0400 Received: from so254-9.mailgun.net ([198.61.254.9]:38094 "EHLO so254-9.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244249AbhDPU2i (ORCPT ); Fri, 16 Apr 2021 16:28:38 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1618604893; h=Message-Id: Date: Subject: Cc: To: From: Sender; bh=Z5idBwlQhEZLRZOuOyizkreWC2NX+mI+QplQa1hscsI=; b=tdRYmcOC/inCdp9Z0RoRwZcR5xICAk64SMB0aeD+dPlYoHpbSKcY3hl6XlgZsh96g7QLXi+r sPVVkVKbNoa3UJXOhCcEfrQS31rsjF5TcGVmt6puunVu/2CboVETmn7fOHhKmJfvpAjbT/8f 2zyBNYnh9HR51Q44hePGwIVDjw0= 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-n04.prod.us-west-2.postgun.com with SMTP id 6079f35c2cc44d3aea4c9a9b (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Fri, 16 Apr 2021 20:28:12 GMT Sender: khsieh=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 76AE4C433CA; Fri, 16 Apr 2021 20:28:12 +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 E6AB3C433C6; Fri, 16 Apr 2021 20:28:10 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org E6AB3C433C6 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 Cc: abhinavk@codeaurora.org, aravindh@codeaurora.org, khsieh@codeaurora.org, airlied@linux.ie, daniel@ffwll.ch, linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/2] drm/msm/dp: service only one irq_hpd if there are multiple irq_hpd pending Date: Fri, 16 Apr 2021 13:27:57 -0700 Message-Id: <1618604877-28297-1-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 Some dongle may generate more than one irq_hpd events in a short period of time. This patch will treat those irq_hpd events as single one and service only one irq_hpd event. Signed-off-by: Kuogee Hsieh --- drivers/gpu/drm/msm/dp/dp_display.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index 5a39da6..0a7d383 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -707,6 +707,9 @@ static int dp_irq_hpd_handle(struct dp_display_private *dp, u32 data) return 0; } + /* only handle first irq_hpd in case of multiple irs_hpd pending */ + dp_del_event(dp, EV_IRQ_HPD_INT); + ret = dp_display_usbpd_attention_cb(&dp->pdev->dev); if (ret == -ECONNRESET) { /* cable unplugged */ dp->core_initialized = false; @@ -1300,6 +1303,9 @@ static int dp_pm_suspend(struct device *dev) /* host_init will be called at pm_resume */ dp->core_initialized = false; + /* system suspended, delete pending irq_hdps */ + dp_del_event(dp, EV_IRQ_HPD_INT); + mutex_unlock(&dp->event_mutex); return 0; @@ -1496,6 +1502,9 @@ int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder *encoder) /* stop sentinel checking */ dp_del_event(dp_display, EV_DISCONNECT_PENDING_TIMEOUT); + /* link is down, delete pending irq_hdps */ + dp_del_event(dp_display, EV_IRQ_HPD_INT); + dp_display_disable(dp_display, 0); rc = dp_display_unprepare(dp);