From patchwork Tue Nov 3 22:53:35 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuogee Hsieh X-Patchwork-Id: 11879225 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 662BF15E6 for ; Tue, 3 Nov 2020 22:54:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 285A820756 for ; Tue, 3 Nov 2020 22:54:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="hrj3z5n4" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728821AbgKCWx7 (ORCPT ); Tue, 3 Nov 2020 17:53:59 -0500 Received: from m42-4.mailgun.net ([69.72.42.4]:29194 "EHLO m42-4.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728972AbgKCWx6 (ORCPT ); Tue, 3 Nov 2020 17:53:58 -0500 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1604444036; h=Content-Transfer-Encoding: MIME-Version: References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=p6jBB6DTNSauSoRE8yElWxlvMCp7zGTsWZCl5mMT8WM=; b=hrj3z5n4Jx3stNF65d9LbZWhL1NU9JtW+VVdrP4Uhn4hlVe462eF9tNwM4EqM0ICnKndv26P 0hrT/WuKoLv+X1mDEPwd3K8B0BIdDhdCDb2kMPuL4KrKtsaPYPOu8kqObsnnYp8xqPxSi+7c c0TDH8FzLypEHAr9y4io1h9av7o= 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-n07.prod.us-west-2.postgun.com with SMTP id 5fa1df84d8a9d167f3736401 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Tue, 03 Nov 2020 22:53:56 GMT Sender: khsieh=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 0CCF2C433FF; Tue, 3 Nov 2020 22:53:56 +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 8D983C433C6; Tue, 3 Nov 2020 22:53:53 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 8D983C433C6 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: dri-devel@lists.freedesktop.org, robdclark@gmail.com, sean@poorly.run, swboyd@chromium.org Cc: Kuogee Hsieh , tanmay@codeaurora.org, abhinavk@codeaurora.org, aravindh@codeaurora.org, airlied@linux.ie, daniel@ffwll.ch, linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 1/2] drm/msm/dp: return correct connection status after suspend Date: Tue, 3 Nov 2020 14:53:35 -0800 Message-Id: <20201103225336.17141-2-khsieh@codeaurora.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20201103225336.17141-1-khsieh@codeaurora.org> References: <20201103225336.17141-1-khsieh@codeaurora.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org During suspend, dp host controller and hpd block are disabled due to both ahb and aux clock are disabled. Therefore hpd plug/unplug interrupts will not be generated. At dp_pm_resume(), reinitialize both dp host controller and hpd block so that hpd plug/unplug interrupts will be generated and handled by driver so that hpd connection state is updated correctly. This patch will fix link training flaky issues. Changes in v2: -- use container_of to cast correct dp_display_private pointer at both dp_pm_suspend() and dp_pm_resume(). Changes in v3: -- replace hpd_state atomic_t with u32 Changes in v4 -- call dp_display_host_deinit() at dp_pm_suspend() -- call dp_display_host_init() at msm_dp_display_enable() -- fix phy->init_count unbalance which causes link training failed Changes in v5 -- add Fixes tag Fixes: 8ede2ecc3e5e (drm/msm/dp: Add DP compliance tests on Snapdragon Chipsets) Tested-by: Stephen Boyd Signed-off-by: Kuogee Hsieh --- drivers/gpu/drm/msm/dp/dp_catalog.c | 13 +++ drivers/gpu/drm/msm/dp/dp_catalog.h | 1 + drivers/gpu/drm/msm/dp/dp_ctrl.c | 5 + drivers/gpu/drm/msm/dp/dp_display.c | 144 +++++++++++++++------------- drivers/gpu/drm/msm/dp/dp_reg.h | 2 + 5 files changed, 97 insertions(+), 68 deletions(-) diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c index b15b4ce4ba35..4963bfe6a472 100644 --- a/drivers/gpu/drm/msm/dp/dp_catalog.c +++ b/drivers/gpu/drm/msm/dp/dp_catalog.c @@ -572,6 +572,19 @@ void dp_catalog_ctrl_hpd_config(struct dp_catalog *dp_catalog) dp_write_aux(catalog, REG_DP_DP_HPD_CTRL, DP_DP_HPD_CTRL_HPD_EN); } +u32 dp_catalog_hpd_get_state_status(struct dp_catalog *dp_catalog) +{ + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + u32 status; + + status = dp_read_aux(catalog, REG_DP_DP_HPD_INT_STATUS); + status >>= DP_DP_HPD_STATE_STATUS_BITS_SHIFT; + status &= DP_DP_HPD_STATE_STATUS_BITS_MASK; + + return status; +} + u32 dp_catalog_hpd_get_intr_status(struct dp_catalog *dp_catalog) { struct dp_catalog_private *catalog = container_of(dp_catalog, diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.h b/drivers/gpu/drm/msm/dp/dp_catalog.h index 4b7666f1fe6f..6d257dbebf29 100644 --- a/drivers/gpu/drm/msm/dp/dp_catalog.h +++ b/drivers/gpu/drm/msm/dp/dp_catalog.h @@ -97,6 +97,7 @@ void dp_catalog_ctrl_enable_irq(struct dp_catalog *dp_catalog, bool enable); void dp_catalog_hpd_config_intr(struct dp_catalog *dp_catalog, u32 intr_mask, bool en); void dp_catalog_ctrl_hpd_config(struct dp_catalog *dp_catalog); +u32 dp_catalog_hpd_get_state_status(struct dp_catalog *dp_catalog); u32 dp_catalog_hpd_get_intr_status(struct dp_catalog *dp_catalog); void dp_catalog_ctrl_phy_reset(struct dp_catalog *dp_catalog); int dp_catalog_ctrl_update_vx_px(struct dp_catalog *dp_catalog, u8 v_level, diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c index 7572264a7156..aa40429cad42 100644 --- a/drivers/gpu/drm/msm/dp/dp_ctrl.c +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c @@ -1403,6 +1403,8 @@ int dp_ctrl_host_init(struct dp_ctrl *dp_ctrl, bool flip) void dp_ctrl_host_deinit(struct dp_ctrl *dp_ctrl) { struct dp_ctrl_private *ctrl; + struct dp_io *dp_io; + struct phy *phy; if (!dp_ctrl) { DRM_ERROR("Invalid input data\n"); @@ -1410,8 +1412,11 @@ void dp_ctrl_host_deinit(struct dp_ctrl *dp_ctrl) } ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl); + dp_io = &ctrl->parser->io; + phy = dp_io->phy; dp_catalog_ctrl_enable_irq(ctrl->catalog, false); + phy_exit(phy); DRM_DEBUG_DP("Host deinitialized successfully\n"); } diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index 871a69f8f9d0..b5e7df481fc5 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -108,14 +108,12 @@ struct dp_display_private { /* event related only access by event thread */ struct mutex event_mutex; wait_queue_head_t event_q; - atomic_t hpd_state; + u32 hpd_state; u32 event_pndx; u32 event_gndx; struct dp_event event_list[DP_EVENT_Q_MAX]; spinlock_t event_lock; - struct completion resume_comp; - struct dp_audio *audio; }; @@ -367,6 +365,20 @@ static void dp_display_host_init(struct dp_display_private *dp) dp->core_initialized = true; } +static void dp_display_host_deinit(struct dp_display_private *dp) +{ + if (!dp->core_initialized) { + DRM_DEBUG_DP("DP core not initialized\n"); + return; + } + + dp_ctrl_host_deinit(dp->ctrl); + dp_aux_deinit(dp->aux); + dp_power_deinit(dp->power); + + dp->core_initialized = false; +} + static int dp_display_usbpd_configure_cb(struct device *dev) { int rc = 0; @@ -491,7 +503,7 @@ static int dp_hpd_plug_handle(struct dp_display_private *dp, u32 data) mutex_lock(&dp->event_mutex); - state = atomic_read(&dp->hpd_state); + state = dp->hpd_state; if (state == ST_SUSPEND_PENDING) { mutex_unlock(&dp->event_mutex); return 0; @@ -509,17 +521,14 @@ static int dp_hpd_plug_handle(struct dp_display_private *dp, u32 data) return 0; } - if (state == ST_SUSPENDED) - tout = DP_TIMEOUT_NONE; - - atomic_set(&dp->hpd_state, ST_CONNECT_PENDING); + dp->hpd_state = ST_CONNECT_PENDING; hpd->hpd_high = 1; ret = dp_display_usbpd_configure_cb(&dp->pdev->dev); if (ret) { /* failed */ hpd->hpd_high = 0; - atomic_set(&dp->hpd_state, ST_DISCONNECTED); + dp->hpd_state = ST_DISCONNECTED; } /* start sanity checking */ @@ -540,10 +549,10 @@ static int dp_connect_pending_timeout(struct dp_display_private *dp, u32 data) mutex_lock(&dp->event_mutex); - state = atomic_read(&dp->hpd_state); + state = dp->hpd_state; if (state == ST_CONNECT_PENDING) { dp_display_enable(dp, 0); - atomic_set(&dp->hpd_state, ST_CONNECTED); + dp->hpd_state = ST_CONNECTED; } mutex_unlock(&dp->event_mutex); @@ -576,7 +585,7 @@ static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data) mutex_lock(&dp->event_mutex); - state = atomic_read(&dp->hpd_state); + state = dp->hpd_state; if (state == ST_SUSPEND_PENDING) { mutex_unlock(&dp->event_mutex); return 0; @@ -594,7 +603,7 @@ static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data) return 0; } - atomic_set(&dp->hpd_state, ST_DISCONNECT_PENDING); + dp->hpd_state = ST_DISCONNECT_PENDING; /* disable HPD plug interrupt until disconnect is done */ dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK @@ -629,10 +638,10 @@ static int dp_disconnect_pending_timeout(struct dp_display_private *dp, u32 data mutex_lock(&dp->event_mutex); - state = atomic_read(&dp->hpd_state); + state = dp->hpd_state; if (state == ST_DISCONNECT_PENDING) { dp_display_disable(dp, 0); - atomic_set(&dp->hpd_state, ST_DISCONNECTED); + dp->hpd_state = ST_DISCONNECTED; } mutex_unlock(&dp->event_mutex); @@ -647,7 +656,7 @@ static int dp_irq_hpd_handle(struct dp_display_private *dp, u32 data) mutex_lock(&dp->event_mutex); /* irq_hpd can happen at either connected or disconnected state */ - state = atomic_read(&dp->hpd_state); + state = dp->hpd_state; if (state == ST_SUSPEND_PENDING) { mutex_unlock(&dp->event_mutex); return 0; @@ -798,17 +807,10 @@ static int dp_display_enable(struct dp_display_private *dp, u32 data) dp_display = g_dp_display; - if (dp_display->power_on) { - DRM_DEBUG_DP("Link already setup, return\n"); - return 0; - } - rc = dp_ctrl_on_stream(dp->ctrl); if (!rc) dp_display->power_on = true; - /* complete resume_comp regardless it is armed or not */ - complete(&dp->resume_comp); return rc; } @@ -837,9 +839,6 @@ static int dp_display_disable(struct dp_display_private *dp, u32 data) dp_display = g_dp_display; - if (!dp_display->power_on) - return -EINVAL; - /* wait only if audio was enabled */ if (dp_display->audio_enabled) { if (!wait_for_completion_timeout(&dp->audio_comp, @@ -1160,9 +1159,6 @@ static int dp_display_probe(struct platform_device *pdev) } mutex_init(&dp->event_mutex); - - init_completion(&dp->resume_comp); - g_dp_display = &dp->dp_display; /* Store DP audio handle inside DP display */ @@ -1198,20 +1194,54 @@ static int dp_display_remove(struct platform_device *pdev) 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; + + dp = container_of(dp_display, struct dp_display_private, dp_display); + + mutex_lock(&dp->event_mutex); + + /* start from disconnected state */ + dp->hpd_state = ST_DISCONNECTED; + + /* turn on dp ctrl/phy */ + dp_display_host_init(dp); + + dp_catalog_ctrl_hpd_config(dp->catalog); + + status = dp_catalog_hpd_get_state_status(dp->catalog); + + if (status) { + dp->dp_display.is_connected = true; + } else { + dp->dp_display.is_connected = false; + /* make sure next resume host_init be called */ + dp->core_initialized = false; + } + + mutex_unlock(&dp->event_mutex); + return 0; } static int dp_pm_suspend(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); - struct dp_display_private *dp = platform_get_drvdata(pdev); + struct msm_dp *dp_display = platform_get_drvdata(pdev); + struct dp_display_private *dp; - if (!dp) { - DRM_ERROR("DP driver bind failed. Invalid driver data\n"); - return -EINVAL; - } + dp = container_of(dp_display, struct dp_display_private, dp_display); - atomic_set(&dp->hpd_state, ST_SUSPENDED); + mutex_lock(&dp->event_mutex); + + if (dp->core_initialized == true) + dp_display_host_deinit(dp); + + dp->hpd_state = ST_SUSPENDED; + + mutex_unlock(&dp->event_mutex); return 0; } @@ -1326,19 +1356,6 @@ int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev, return 0; } -static int dp_display_wait4resume_done(struct dp_display_private *dp) -{ - int ret = 0; - - reinit_completion(&dp->resume_comp); - if (!wait_for_completion_timeout(&dp->resume_comp, - WAIT_FOR_RESUME_TIMEOUT_JIFFIES)) { - DRM_ERROR("wait4resume_done timedout\n"); - ret = -ETIMEDOUT; - } - return ret; -} - int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder) { int rc = 0; @@ -1353,6 +1370,8 @@ int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder) mutex_lock(&dp_display->event_mutex); + dp_del_event(dp_display, EV_CONNECT_PENDING_TIMEOUT); + rc = dp_display_set_mode(dp, &dp_display->dp_mode); if (rc) { DRM_ERROR("Failed to perform a mode set, rc=%d\n", rc); @@ -1367,15 +1386,10 @@ int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder) return rc; } - state = atomic_read(&dp_display->hpd_state); - if (state == ST_SUSPENDED) { - /* start link training */ - dp_add_event(dp_display, EV_HPD_PLUG_INT, 0, 0); - mutex_unlock(&dp_display->event_mutex); + state = dp_display->hpd_state; - /* wait until dp interface is up */ - goto resume_done; - } + if (state == ST_SUSPEND_PENDING) + dp_display_host_init(dp_display); dp_display_enable(dp_display, 0); @@ -1386,21 +1400,15 @@ int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder) dp_display_unprepare(dp); } - dp_del_event(dp_display, EV_CONNECT_PENDING_TIMEOUT); - if (state == ST_SUSPEND_PENDING) dp_add_event(dp_display, EV_IRQ_HPD_INT, 0, 0); /* completed connection */ - atomic_set(&dp_display->hpd_state, ST_CONNECTED); + dp_display->hpd_state = ST_CONNECTED; mutex_unlock(&dp_display->event_mutex); return rc; - -resume_done: - dp_display_wait4resume_done(dp_display); - return rc; } int msm_dp_display_pre_disable(struct msm_dp *dp, struct drm_encoder *encoder) @@ -1424,20 +1432,20 @@ int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder *encoder) mutex_lock(&dp_display->event_mutex); + dp_del_event(dp_display, EV_DISCONNECT_PENDING_TIMEOUT); + dp_display_disable(dp_display, 0); rc = dp_display_unprepare(dp); if (rc) DRM_ERROR("DP display unprepare failed, rc=%d\n", rc); - dp_del_event(dp_display, EV_DISCONNECT_PENDING_TIMEOUT); - - state = atomic_read(&dp_display->hpd_state); + state = dp_display->hpd_state; if (state == ST_DISCONNECT_PENDING) { /* completed disconnection */ - atomic_set(&dp_display->hpd_state, ST_DISCONNECTED); + dp_display->hpd_state = ST_DISCONNECTED; } else { - atomic_set(&dp_display->hpd_state, ST_SUSPEND_PENDING); + dp_display->hpd_state = ST_SUSPEND_PENDING; } mutex_unlock(&dp_display->event_mutex); diff --git a/drivers/gpu/drm/msm/dp/dp_reg.h b/drivers/gpu/drm/msm/dp/dp_reg.h index 43042ff90a19..268602803d9a 100644 --- a/drivers/gpu/drm/msm/dp/dp_reg.h +++ b/drivers/gpu/drm/msm/dp/dp_reg.h @@ -32,6 +32,8 @@ #define DP_DP_IRQ_HPD_INT_ACK (0x00000002) #define DP_DP_HPD_REPLUG_INT_ACK (0x00000004) #define DP_DP_HPD_UNPLUG_INT_ACK (0x00000008) +#define DP_DP_HPD_STATE_STATUS_BITS_MASK (0x0000000F) +#define DP_DP_HPD_STATE_STATUS_BITS_SHIFT (0x1C) #define REG_DP_DP_HPD_INT_MASK (0x0000000C) #define DP_DP_HPD_PLUG_INT_MASK (0x00000001) From patchwork Tue Nov 3 22:53:36 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuogee Hsieh X-Patchwork-Id: 11879227 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 4D15415E6 for ; Tue, 3 Nov 2020 22:54:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 209DC20756 for ; Tue, 3 Nov 2020 22:54:03 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="t7bFwfeR" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730792AbgKCWyC (ORCPT ); Tue, 3 Nov 2020 17:54:02 -0500 Received: from z5.mailgun.us ([104.130.96.5]:15553 "EHLO z5.mailgun.us" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728972AbgKCWyC (ORCPT ); Tue, 3 Nov 2020 17:54:02 -0500 DKIM-Signature: a=rsa-sha256; v=1; 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Tue, 3 Nov 2020 22:53:57 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 08F45C433C6 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: dri-devel@lists.freedesktop.org, robdclark@gmail.com, sean@poorly.run, swboyd@chromium.org Cc: Kuogee Hsieh , tanmay@codeaurora.org, abhinavk@codeaurora.org, aravindh@codeaurora.org, airlied@linux.ie, daniel@ffwll.ch, linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 2/2] drm/msm/dp: fixes wrong connection state caused by failure of link train Date: Tue, 3 Nov 2020 14:53:36 -0800 Message-Id: <20201103225336.17141-3-khsieh@codeaurora.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20201103225336.17141-1-khsieh@codeaurora.org> References: <20201103225336.17141-1-khsieh@codeaurora.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Connection state is not set correctly happen when either failure of link train due to cable unplugged in the middle of aux channel reading or cable plugged in while in suspended state. This patch fixes these problems. This patch also replace ST_SUSPEND_PENDING with ST_DISPLAY_OFF. Changes in V2: -- Add more information to commit message. Changes in V3: -- change base Changes in V4: -- add Fixes tag Fixes: 22688d4067f6 (drm/msm/dp: return correct connection status after suspend) Signed-off-by: Kuogee Hsieh --- drivers/gpu/drm/msm/dp/dp_display.c | 42 ++++++++++++++--------------- drivers/gpu/drm/msm/dp/dp_panel.c | 5 ++++ 2 files changed, 25 insertions(+), 22 deletions(-) diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index b5e7df481fc5..6e8640f8c69b 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -45,7 +45,7 @@ enum { ST_CONNECT_PENDING, ST_CONNECTED, ST_DISCONNECT_PENDING, - ST_SUSPEND_PENDING, + ST_DISPLAY_OFF, ST_SUSPENDED, }; @@ -504,7 +504,7 @@ static int dp_hpd_plug_handle(struct dp_display_private *dp, u32 data) mutex_lock(&dp->event_mutex); state = dp->hpd_state; - if (state == ST_SUSPEND_PENDING) { + if (state == ST_DISPLAY_OFF || state == ST_SUSPENDED) { mutex_unlock(&dp->event_mutex); return 0; } @@ -526,14 +526,14 @@ static int dp_hpd_plug_handle(struct dp_display_private *dp, u32 data) hpd->hpd_high = 1; ret = dp_display_usbpd_configure_cb(&dp->pdev->dev); - if (ret) { /* failed */ + if (ret) { /* link train failed */ hpd->hpd_high = 0; dp->hpd_state = ST_DISCONNECTED; + } else { + /* start sentinel checking in case of missing uevent */ + dp_add_event(dp, EV_CONNECT_PENDING_TIMEOUT, 0, tout); } - /* start sanity checking */ - dp_add_event(dp, EV_CONNECT_PENDING_TIMEOUT, 0, tout); - mutex_unlock(&dp->event_mutex); /* uevent will complete connection part */ @@ -586,11 +586,6 @@ static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data) mutex_lock(&dp->event_mutex); state = dp->hpd_state; - if (state == ST_SUSPEND_PENDING) { - mutex_unlock(&dp->event_mutex); - return 0; - } - if (state == ST_DISCONNECT_PENDING || state == ST_DISCONNECTED) { mutex_unlock(&dp->event_mutex); return 0; @@ -617,7 +612,7 @@ static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data) */ dp_display_usbpd_disconnect_cb(&dp->pdev->dev); - /* start sanity checking */ + /* start sentinel checking in case of missing uevent */ dp_add_event(dp, EV_DISCONNECT_PENDING_TIMEOUT, 0, DP_TIMEOUT_5_SECOND); /* signal the disconnect event early to ensure proper teardown */ @@ -657,7 +652,7 @@ static int dp_irq_hpd_handle(struct dp_display_private *dp, u32 data) /* irq_hpd can happen at either connected or disconnected state */ state = dp->hpd_state; - if (state == ST_SUSPEND_PENDING) { + if (state == ST_DISPLAY_OFF) { mutex_unlock(&dp->event_mutex); return 0; } @@ -1082,7 +1077,7 @@ static irqreturn_t dp_display_irq_handler(int irq, void *dev_id) } if (hpd_isr_status & DP_DP_IRQ_HPD_INT_MASK) { - /* delete connect pending event first */ + /* stop sentinel connect pending checking */ dp_del_event(dp, EV_CONNECT_PENDING_TIMEOUT); dp_add_event(dp, EV_IRQ_HPD_INT, 0, 0); } @@ -1213,13 +1208,10 @@ static int dp_pm_resume(struct device *dev) status = dp_catalog_hpd_get_state_status(dp->catalog); - if (status) { + if (status) dp->dp_display.is_connected = true; - } else { + else dp->dp_display.is_connected = false; - /* make sure next resume host_init be called */ - dp->core_initialized = false; - } mutex_unlock(&dp->event_mutex); @@ -1241,6 +1233,9 @@ static int dp_pm_suspend(struct device *dev) dp->hpd_state = ST_SUSPENDED; + /* host_init will be called at pm_resume */ + dp->core_initialized = false; + mutex_unlock(&dp->event_mutex); return 0; @@ -1370,6 +1365,7 @@ int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder) mutex_lock(&dp_display->event_mutex); + /* stop sentinel checking */ dp_del_event(dp_display, EV_CONNECT_PENDING_TIMEOUT); rc = dp_display_set_mode(dp, &dp_display->dp_mode); @@ -1388,7 +1384,7 @@ int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder) state = dp_display->hpd_state; - if (state == ST_SUSPEND_PENDING) + if (state == ST_DISPLAY_OFF) dp_display_host_init(dp_display); dp_display_enable(dp_display, 0); @@ -1400,7 +1396,8 @@ int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder) dp_display_unprepare(dp); } - if (state == ST_SUSPEND_PENDING) + /* manual kick off plug event to train link */ + if (state == ST_DISPLAY_OFF) dp_add_event(dp_display, EV_IRQ_HPD_INT, 0, 0); /* completed connection */ @@ -1432,6 +1429,7 @@ int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder *encoder) mutex_lock(&dp_display->event_mutex); + /* stop sentinel checking */ dp_del_event(dp_display, EV_DISCONNECT_PENDING_TIMEOUT); dp_display_disable(dp_display, 0); @@ -1445,7 +1443,7 @@ int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder *encoder) /* completed disconnection */ dp_display->hpd_state = ST_DISCONNECTED; } else { - dp_display->hpd_state = ST_SUSPEND_PENDING; + dp_display->hpd_state = ST_DISPLAY_OFF; } mutex_unlock(&dp_display->event_mutex); diff --git a/drivers/gpu/drm/msm/dp/dp_panel.c b/drivers/gpu/drm/msm/dp/dp_panel.c index 18cec4fc5e0b..1b7a20dc2d8e 100644 --- a/drivers/gpu/drm/msm/dp/dp_panel.c +++ b/drivers/gpu/drm/msm/dp/dp_panel.c @@ -196,6 +196,11 @@ int dp_panel_read_sink_caps(struct dp_panel *dp_panel, &panel->aux->ddc); if (!dp_panel->edid) { DRM_ERROR("panel edid read failed\n"); + /* check edid read fail is due to unplug */ + if (!dp_catalog_hpd_get_state_status(panel->catalog)) { + rc = -ETIMEDOUT; + goto end; + } /* fail safe edid */ mutex_lock(&connector->dev->mode_config.mutex);