From patchwork Mon Apr 12 17:03:23 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuogee Hsieh X-Patchwork-Id: 12198541 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 ADDD7C43470 for ; Mon, 12 Apr 2021 17:04:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 791A8610CA for ; Mon, 12 Apr 2021 17:04:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243785AbhDLRFI (ORCPT ); Mon, 12 Apr 2021 13:05:08 -0400 Received: from so254-9.mailgun.net ([198.61.254.9]:63408 "EHLO so254-9.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244125AbhDLREI (ORCPT ); Mon, 12 Apr 2021 13:04:08 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1618247030; h=Message-Id: Date: Subject: Cc: To: From: Sender; bh=3l8HW1rNzvaQs+RTHspb+EbKaL0TMdVmEqx1yLOrbCU=; b=jpC0+pNAizsb5moltP/ym8jelDDaIlWhbzSMbOkXhQxMgVjZORSrAsijEyuK3bbuMWTzhAVb wubNCaA/bh+jkn5mC2dkPRurBAOihMy6gCCjfXc3qeV4kg/nD2ynNJW6zTY0fkj8buk/jEhc 1RCaFeYAPu+h8/TvMM8DN/keZHY= 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-east-1.postgun.com with SMTP id 60747d648166b7eff75d6e0b (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Mon, 12 Apr 2021 17:03:32 GMT Sender: khsieh=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 76E3AC43465; Mon, 12 Apr 2021 17:03:31 +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 932BFC43461; Mon, 12 Apr 2021 17:03:29 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 932BFC43461 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: tanmay@codeaurora.org, 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 2/2] drm/msm/dp: do not re initialize of audio_comp Date: Mon, 12 Apr 2021 10:03:23 -0700 Message-Id: <1618247003-28821-1-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 At dp_display_disable(), do not re initialize audio_comp if hdp_state == ST_DISCONNECT_PENDING (unplug event) to avoid race condition which cause 5 second timeout expired. Also add abort mechanism to reduce time spinning at dp_aux_transfer() during dpcd read if type-c connection had been broken. Signed-off-by: Kuogee Hsieh --- drivers/gpu/drm/msm/dp/dp_aux.c | 18 ++++++++++++++++++ drivers/gpu/drm/msm/dp/dp_aux.h | 1 + drivers/gpu/drm/msm/dp/dp_display.c | 16 ++++++++++++---- drivers/gpu/drm/msm/dp/dp_link.c | 20 +++++++++++++++----- 4 files changed, 46 insertions(+), 9 deletions(-) diff --git a/drivers/gpu/drm/msm/dp/dp_aux.c b/drivers/gpu/drm/msm/dp/dp_aux.c index 7c22bfe..e5ece8c 100644 --- a/drivers/gpu/drm/msm/dp/dp_aux.c +++ b/drivers/gpu/drm/msm/dp/dp_aux.c @@ -28,6 +28,7 @@ struct dp_aux_private { u32 offset; u32 segment; u32 isr; + atomic_t aborted; struct drm_dp_aux dp_aux; }; @@ -343,6 +344,11 @@ static ssize_t dp_aux_transfer(struct drm_dp_aux *dp_aux, mutex_lock(&aux->mutex); + if (atomic_read(&aux->aborted)) { + ret = -ETIMEDOUT; + goto unlock_exit; + } + aux->native = msg->request & (DP_AUX_NATIVE_WRITE & DP_AUX_NATIVE_READ); /* Ignore address only message */ @@ -533,3 +539,15 @@ void dp_aux_put(struct drm_dp_aux *dp_aux) devm_kfree(aux->dev, aux); } + +void dp_aux_abort(struct drm_dp_aux *dp_aux, bool abort) +{ + struct dp_aux_private *aux; + + if (!dp_aux) + return; + + aux = container_of(dp_aux, struct dp_aux_private, dp_aux); + + atomic_set(&aux->aborted, abort); +} diff --git a/drivers/gpu/drm/msm/dp/dp_aux.h b/drivers/gpu/drm/msm/dp/dp_aux.h index f8b8ba9..c17df7f 100644 --- a/drivers/gpu/drm/msm/dp/dp_aux.h +++ b/drivers/gpu/drm/msm/dp/dp_aux.h @@ -23,6 +23,7 @@ void dp_aux_isr(struct drm_dp_aux *dp_aux); void dp_aux_init(struct drm_dp_aux *dp_aux); void dp_aux_deinit(struct drm_dp_aux *dp_aux); void dp_aux_reconfig(struct drm_dp_aux *dp_aux); +void dp_aux_abort(struct drm_dp_aux *dp_aux, bool abort); struct drm_dp_aux *dp_aux_get(struct device *dev, struct dp_catalog *catalog); void dp_aux_put(struct drm_dp_aux *aux); diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index 4992a049..8960333 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -898,8 +898,10 @@ static int dp_display_disable(struct dp_display_private *dp, u32 data) /* wait only if audio was enabled */ if (dp_display->audio_enabled) { /* signal the disconnect event */ - reinit_completion(&dp->audio_comp); - dp_display_handle_plugged_change(dp_display, false); + if (dp->hpd_state != ST_DISCONNECT_PENDING) { + reinit_completion(&dp->audio_comp); + dp_display_handle_plugged_change(dp_display, false); + } if (!wait_for_completion_timeout(&dp->audio_comp, HZ * 5)) DRM_ERROR("audio comp timeout\n"); @@ -1137,20 +1139,26 @@ static irqreturn_t dp_display_irq_handler(int irq, void *dev_id) /* hpd related interrupts */ if (hpd_isr_status & DP_DP_HPD_PLUG_INT_MASK || hpd_isr_status & DP_DP_HPD_REPLUG_INT_MASK) { + dp_aux_abort(dp->aux, false); dp_add_event(dp, EV_HPD_PLUG_INT, 0, 0); } if (hpd_isr_status & DP_DP_IRQ_HPD_INT_MASK) { /* stop sentinel connect pending checking */ + dp_aux_abort(dp->aux, false); dp_del_event(dp, EV_CONNECT_PENDING_TIMEOUT); dp_add_event(dp, EV_IRQ_HPD_INT, 0, 0); } - if (hpd_isr_status & DP_DP_HPD_REPLUG_INT_MASK) + if (hpd_isr_status & DP_DP_HPD_REPLUG_INT_MASK) { + dp_aux_abort(dp->aux, false); dp_add_event(dp, EV_HPD_REPLUG_INT, 0, 0); + } - if (hpd_isr_status & DP_DP_HPD_UNPLUG_INT_MASK) + if (hpd_isr_status & DP_DP_HPD_UNPLUG_INT_MASK) { + dp_aux_abort(dp->aux, true); dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0); + } } /* DP controller isr */ diff --git a/drivers/gpu/drm/msm/dp/dp_link.c b/drivers/gpu/drm/msm/dp/dp_link.c index be986da..d35b18e 100644 --- a/drivers/gpu/drm/msm/dp/dp_link.c +++ b/drivers/gpu/drm/msm/dp/dp_link.c @@ -737,18 +737,25 @@ static int dp_link_parse_sink_count(struct dp_link *dp_link) return 0; } -static void dp_link_parse_sink_status_field(struct dp_link_private *link) +static int dp_link_parse_sink_status_field(struct dp_link_private *link) { int len = 0; link->prev_sink_count = link->dp_link.sink_count; - dp_link_parse_sink_count(&link->dp_link); + len = dp_link_parse_sink_count(&link->dp_link); + if (len < 0) { + DRM_ERROR("DP lparse sink count failed\n"); + return len; + } len = drm_dp_dpcd_read_link_status(link->aux, link->link_status); - if (len < DP_LINK_STATUS_SIZE) + if (len < DP_LINK_STATUS_SIZE) { DRM_ERROR("DP link status read failed\n"); - dp_link_parse_request(link); + return len; + } + + return dp_link_parse_request(link); } /** @@ -1032,7 +1039,10 @@ int dp_link_process_request(struct dp_link *dp_link) dp_link_reset_data(link); - dp_link_parse_sink_status_field(link); + ret = dp_link_parse_sink_status_field(link); + if (ret) { + return ret; + } if (link->request.test_requested == DP_TEST_LINK_EDID_READ) { dp_link->sink_request |= DP_TEST_LINK_EDID_READ;