From patchwork Fri Nov 13 22:26:39 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuogee Hsieh X-Patchwork-Id: 11905019 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B017A1391 for ; Fri, 13 Nov 2020 22:26:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 91BAD22256 for ; Fri, 13 Nov 2020 22:26:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="L/FyYN5x" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726090AbgKMW05 (ORCPT ); Fri, 13 Nov 2020 17:26:57 -0500 Received: from m42-4.mailgun.net ([69.72.42.4]:52980 "EHLO m42-4.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725866AbgKMW0x (ORCPT ); Fri, 13 Nov 2020 17:26:53 -0500 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1605306411; h=Content-Transfer-Encoding: MIME-Version: Message-Id: Date: Subject: Cc: To: From: Sender; bh=MxIz1PS/QYcvKUyybnMX0F8kTF31tCq+qC/fv7RjJlc=; b=L/FyYN5xGrhFM3AdWn8OeRab9TmHK7AYsNQCSMhW8KMtehUL1q8KwdDmYI2YGeVCL9RvCH6F wlZsboU1C4PGxnzT+idUkZND9D5vFJaooFXJ6P5L/mjvZzn1QkzIT5bBfm57oeWt69j0qisa +21VbGNSy1lFel5dqoha/mYe4AU= X-Mailgun-Sending-Ip: 69.72.42.4 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-n08.prod.us-east-1.postgun.com with SMTP id 5faf082bf34fcfd5e52180e7 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Fri, 13 Nov 2020 22:26:51 GMT Sender: khsieh=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 850CBC43387; Fri, 13 Nov 2020 22:26:50 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=ALL_TRUSTED,BAYES_00,SPF_FAIL, URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 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 DB71EC433C9; Fri, 13 Nov 2020 22:26:48 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org DB71EC433C9 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] drm/msm/dp: fix connect/disconnect handled at ir_hdp Date: Fri, 13 Nov 2020 14:26:39 -0800 Message-Id: <20201113222639.18786-1-khsieh@codeaurora.org> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Some usb type-c dongle use irq_hpd request to perform device connect and disconnect. This patch add handling of both connection and disconnection are based on hpd_state and sink_count. Fixes: 6c6e8b2e04d5 ("drm/msm/dp: promote irq_hpd handle to handle link training correctly") Signed-off-by: Kuogee Hsieh Reported-by: kernel test robot --- drivers/gpu/drm/msm/dp/dp_display.c | 78 +++++++++++++++++------------ 1 file changed, 45 insertions(+), 33 deletions(-) base-commit: 6c6e8b2e04d537f42b5ebb8b8b0b31a39b44ccf4 diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index 27e7e27b8b90..4e84f500b721 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -279,13 +279,25 @@ static void dp_display_send_hpd_event(struct msm_dp *dp_display) drm_helper_hpd_irq_event(connector->dev); } -static int dp_display_send_hpd_notification(struct dp_display_private *dp, - bool hpd) + +static void dp_display_set_encoder_mode(struct dp_display_private *dp) { - static bool encoder_mode_set; struct msm_drm_private *priv = dp->dp_display.drm_dev->dev_private; struct msm_kms *kms = priv->kms; + static bool encoder_mode_set; + + if (!encoder_mode_set && dp->dp_display.encoder && + kms->funcs->set_encoder_mode) { + kms->funcs->set_encoder_mode(kms, + dp->dp_display.encoder, false); + encoder_mode_set = true; + } +} + +static int dp_display_send_hpd_notification(struct dp_display_private *dp, + bool hpd) +{ if ((hpd && dp->dp_display.is_connected) || (!hpd && !dp->dp_display.is_connected)) { DRM_DEBUG_DP("HPD already %s\n", (hpd ? "on" : "off")); @@ -298,15 +310,6 @@ static int dp_display_send_hpd_notification(struct dp_display_private *dp, dp->dp_display.is_connected = hpd; - if (dp->dp_display.is_connected && dp->dp_display.encoder - && !encoder_mode_set - && kms->funcs->set_encoder_mode) { - kms->funcs->set_encoder_mode(kms, - dp->dp_display.encoder, false); - DRM_DEBUG_DP("set_encoder_mode() Completed\n"); - encoder_mode_set = true; - } - dp_display_send_hpd_event(&dp->dp_display); return 0; @@ -359,6 +362,8 @@ static void dp_display_host_init(struct dp_display_private *dp) if (dp->usbpd->orientation == ORIENTATION_CC2) flip = true; + dp_display_set_encoder_mode(dp); + dp_power_init(dp->power, flip); dp_ctrl_host_init(dp->ctrl, flip); dp_aux_init(dp->aux); @@ -448,15 +453,6 @@ static int dp_display_handle_irq_hpd(struct dp_display_private *dp) sink_request = dp->link->sink_request; - if (sink_request & DS_PORT_STATUS_CHANGED) { - if (dp_display_is_sink_count_zero(dp)) { - DRM_DEBUG_DP("sink count is zero, nothing to do\n"); - return -ENOTCONN; - } - - return dp_display_process_hpd_high(dp); - } - dp_ctrl_handle_sink_request(dp->ctrl); if (dp->link->sink_request & DP_TEST_LINK_VIDEO_PATTERN) @@ -491,17 +487,29 @@ static int dp_display_usbpd_attention_cb(struct device *dev) if (!rc) { sink_request = dp->link->sink_request; if (sink_request & DS_PORT_STATUS_CHANGED) { - /* same as unplugged */ - hpd->hpd_high = 0; - dp->hpd_state = ST_DISCONNECT_PENDING; - dp_add_event(dp, EV_USER_NOTIFICATION, false, 0); - } - - rc = dp_display_handle_irq_hpd(dp); - - if (!rc && (sink_request & DS_PORT_STATUS_CHANGED)) { - hpd->hpd_high = 1; - dp->hpd_state = ST_CONNECT_PENDING; + if (dp_display_is_sink_count_zero(dp)) { + DRM_DEBUG_DP("sink count is zero, nothing to do\n"); + if (dp->hpd_state != ST_DISCONNECTED) { + hpd->hpd_high = 0; + dp->hpd_state = ST_DISCONNECT_PENDING; + dp_add_event(dp, EV_USER_NOTIFICATION, false, 0); + } + rc = -ENOTCONN; + } else { + if (dp->hpd_state == ST_DISCONNECTED) { + hpd->hpd_high = 1; + dp->hpd_state = ST_CONNECT_PENDING; + + rc = dp_display_process_hpd_high(dp); + if (rc) { + hpd->hpd_high = 0; + dp->hpd_state = ST_DISCONNECTED; + } + } + } + } else { + if (!dp_display_is_ds_bridge(dp->panel)) + rc = dp_display_handle_irq_hpd(dp); } } @@ -661,6 +669,7 @@ static int dp_disconnect_pending_timeout(struct dp_display_private *dp, u32 data static int dp_irq_hpd_handle(struct dp_display_private *dp, u32 data) { u32 state; + int ret; mutex_lock(&dp->event_mutex); @@ -671,7 +680,10 @@ static int dp_irq_hpd_handle(struct dp_display_private *dp, u32 data) return 0; } - dp_display_usbpd_attention_cb(&dp->pdev->dev); + ret = dp_display_usbpd_attention_cb(&dp->pdev->dev); + if (ret == -ECONNRESET) { /* cable unplugged */ + dp->core_initialized = false; + } mutex_unlock(&dp->event_mutex);